Design Example Report
Title
14 W Non-Dim m able, High Efficiency
(>86% ), P ow er Factor Corrected I solated
Flyback LED Driver Using LYTSw itch TM -5
LYT5226D
Specification
90 VAC – 265 VAC Input;
20 VMIN – 40 VMAX, 350 mATYP Output
Application
Down Light
Author
Applications Engineering Department
Document
Number
DER-528
Date
March 09, 2016
Revision
1.0
Summary and Features
• Single-stage power factor corrected, PF >0.9
• Wide output LED voltage range (20 VMIN - 40 VMAX) with accurate current regulation, ±5%
• Highly energy efficient, >86% at 115 V / 230 V
• Low cost and low component count for compact PCB solution
• Integrated protection features
• No-load and output short-circuit protection
• Input and output OVP
• Thermal foldback protection
• Over temperature protection
• No damage during line brown-out or brown-in conditions
• Meets IEC 2.5 kV ring wave, 1 kV differential surge
• Meets EN55015 conducted EMI with LED heat sink grounded
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
PATENT INFORMATION
The products and applications illustrated herein (including transformer construction and circuits external to the products) may
be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned
to Power Integrations. A complete list of Power Integrations' patents may be found at www.powerint.com. Power Integrations
grants its customers a license under certain patent rights as set forth at <http://www.powerint.com/ip.htm>.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 2 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Table of Contents
1
2
3
4
Introduction .........................................................................................................5
Power Supply Specification ...................................................................................8
Schematic ............................................................................................................9
Circuit Description .............................................................................................. 10
4.1
Input Stage ................................................................................................. 10
4.2
EMI Filters ................................................................................................... 10
4.3
LYTSwitch-5 Primary Control Circuit .............................................................. 10
5 PCB Layout ........................................................................................................ 12
6 Bill of Materials .................................................................................................. 13
7 Inductor Specification ......................................................................................... 14
7.1
Electrical Diagram ........................................................................................ 14
7.2
Electrical Specifications ................................................................................ 14
7.3
Material List ................................................................................................ 14
7.4
Inductor Build Diagram ................................................................................ 15
7.5
Inductor Construction .................................................................................. 15
7.6
Winding Illustrations .................................................................................... 16
8 Inductor Design Spreadsheet .............................................................................. 21
9 Performance Data .............................................................................................. 24
9.1
Efficiency .................................................................................................... 24
9.2
Line Regulation............................................................................................ 25
9.3
Power Factor ............................................................................................... 26
9.4
%ATHD ...................................................................................................... 27
9.5
Power Input Difference Between 120 V to 230 V ........................................... 28
9.6
Individual Harmonics Content ....................................................................... 29
10
Test Data ....................................................................................................... 35
10.1 Test Data, 40 V LED Load ............................................................................ 35
10.2 Test Data, 35 V LED Load ............................................................................ 35
10.3 Test Data, 30 V LED Load ............................................................................ 36
10.4 Test Data, 25 V LED Load ............................................................................ 36
10.5 Test Data, 20 V LED Load ............................................................................ 37
10.6 Test Data, Power Input Difference Between 120 V and 230 V......................... 37
10.7 Test Data, Harmonic Content at 230 VAC with 40 V LED Load ........................ 38
10.8 Test Data, Harmonic Content at 115 VAC with 40 V LED Load ........................ 39
10.9 Test Data, Harmonic Content at 230 VAC with 30 V LED Load ........................ 40
10.10
Test Data, Harmonic Content at 115 VAC with 30 V LED Load ..................... 41
10.11
Test Data, Harmonic Content at 230 VAC with 20 V LED Load ..................... 42
10.12
Test Data, Harmonic Content at 115 VAC with 20 V LED Load ..................... 43
11
Thermal Performance ...................................................................................... 44
11.1 Thermal Performance Scan – Open Frame Unit ............................................. 44
11.1.1 Thermal Scan ....................................................................................... 45
11.1.2 Thermal Scan at the Top Side ................................................................ 47
11.2 Thermal Performance at 85 ºC ..................................................................... 48
Page 3 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
11.2.1 Thermal Performance at 230 VAC with a 40 V LED Load .......................... 49
11.2.2 Thermal Performance at 120 VAC with a 40 V LED Load .......................... 50
12
Waveforms ..................................................................................................... 51
12.1 Input Voltage and Input Current Waveforms ................................................. 51
12.2 Output Current Rise ..................................................................................... 54
12.3 Output Current Fall ...................................................................................... 58
12.4 Drain Voltage and Current in Normal Operation ............................................. 60
12.5 Drain Voltage and Current Start-up Profile..................................................... 64
12.6 Drain Voltage and Current during Output Short-Circuit Condition .................... 66
12.7 Output Diode Voltage and Current in Normal Operation ................................. 67
12.8 Output Voltage and Current – Open LED Load ............................................... 68
12.9 Output Voltage and Current – Start-up with Open Load ................................. 68
12.10
Output Ripple Current............................................................................... 69
13
AC Cycling Test ............................................................................................... 70
14
Conducted EMI ............................................................................................... 72
14.1 Test Set-up ................................................................................................. 72
14.1.1 Equipment and Load Used ..................................................................... 72
14.2 EMI Test Result ........................................................................................... 73
15
Line Surge ...................................................................................................... 75
16
Brown-in/Brown-out Test ................................................................................ 76
17
Revision History .............................................................................................. 77
Important Note: Although this board is designed to satisfy safety isolation requirements, the engineering
prototype has not been agency approved. Therefore, all testing should be performed using an isolation
transformer to provide the AC input to the prototype board.
Power Integrations, Inc.
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Page 4 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
1 Introduction
This engineering report describes a non-dimmable, isolated flyback LED driver designed
to drive a 20 V to 40 V LED voltage string at 350 mA from an input voltage range of 90
VAC to 265 VAC. The LED driver utilizes the LYT5226D from the LYTSwitch-5 family of
devices.
LYTSwitch-5 is a non-dimmable LED driver IC with single stage PFC function and
accurate LED current control. LYTSwitch-5 incorporates a high-voltage power MOSFET
and discontinuous mode, variable frequency, variable on-time controller. The controller
also provides fast (cycle-by-cycle) current limit, input and output OVP, plus advanced
thermal management circuitry.
DER-528 provides a 350 mA nominal constant current output within 20 VMIN – 40 VMAX
output LED voltage ranges. The key design goals were high efficiency and constant
current regulation throughout a wide input and output voltage range.
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, design spreadsheet and performance
data.
Figure 1 – Populated Circuit Board.
Page 5 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 2 – Populated Circuit Board, Top View.
Power Integrations, Inc.
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Page 6 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 3 – Populated Circuit Board, Bottom View.
Note: The following component locations were unstuffed (not populated): R12, R1, R5, C3, and C9
Page 7 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
2 Power Supply Specification
The table below represents the minimum acceptable performance of the design. Actual
performance is listed in the results section.
Description
Input
Voltage
Frequency
Output
Output Voltage
Output Current
Total Output Power
Continuous Output Power
Efficiency
Full Load
Symbol
Min
Typ
Max
Units
Comment
VIN
fLINE
90
115/230
60/50
265
VAC
Hz
2 Wire – no P.E.
VOUT
IOUT
20
30
350
40
V
mA
POUT
14
W
η
86
%
115 V / 60 Hz and 230 V /
50 Hz at 25 ºC.
Environmental
Conducted EMI
CISPR 15B / EN55015B
Safety
Isolated
Ring Wave (100 kHz)
2.5
kV
Differential Mode (L1-L2)
1.0
kV
Power Factor
0.9
Ambient Temperature
TAMB
Power Integrations, Inc.
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Measured at 230 VAC / 50 Hz
and 115 VAC / 60 Hz.
85
o
C
Free Convection, Sea Level.
Page 8 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
3 Schematic
Figure 4 – Schematic.
Page 9 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
4 Circuit Description
The LYTSwitch-5 device (U1-LYT5226D) combines a high-voltage power MOSFET and a
power supply controller in a single SO16 package. IC U1 is configured to drive a 14 W
isolated flyback LED driver throughout a wide input (90 V – 265 V) and output voltage
(20 VMIN – 40 VMAX) range.
4.1 I nput Stage
Fuse F1 provides safety protection from component failures. Varistor RV1 acts as a
voltage clamp that limits the voltage spike on the primary during line transient voltage
surge events. A 275 VAC rated part was selected, being slightly above the maximum
specified operating voltage (265 VAC).
The AC input is full wave rectified by BR1 to achieve good power factor and low THD.
4.2 EM I Filters
The differential choke L2, together with the input filter capacitor C8 and C4 work as an
EMI π filter. The π filter together with common mode choke L1, Y-capacitor C2 and the
LYTSwitch-5 frequency jittering feature ensure compliance with the EN55015 Class B
emission limit.
4.3 LYTSw itch-5 P rim ary Control Circuit
The topology is an isolated flyback. The primary winding finish terminal (no dot end) of
the transformer (T1) is connected to the DC bus and the start (dotted end) terminal to
the DRAIN (D) pin of the LYTSwitch-5 IC. During the on-time of the power MOSFET,
current ramps through the primary winding, storing energy which is then delivered to the
output load via output diode D3 during the power MOSFET off-time.
During the power MOSFET off time RCD snubber D2, R2, R4 and C1 clamp the leakage
voltage spike to a safe level. Output capacitor C5 provides output voltage filtering
minimizing the output LED ripple current with R7 acting as preload.
Diode D4 and C7 deliver the primary bias supply for U1 from transformer auxiliary
winding. For a wide output LED voltage application, the bias voltage is set to 30 V at
maximum LED output voltage. The use of an external bias supply (via R11) is
recommended to give the lowest device dissipation and provide sufficient supply to U1 at
low LED voltage. Resistor R8 is added to dampen the leakage ring from the bias winding
that could mis-trigger the device output OVP function.
Capacitor C10 provides local decoupling for the BYPASS (BP) pin of U1, which is the
supply pin for the IC. During start-up, the bypass capacitor C10 is charged to ~5.25 V
from IC internal high-voltage current source connected to the D pin.
Power Integrations, Inc.
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Page 10 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
To provide input line voltage information to U1, the input AC voltage is sensed directly
after the bridge rectifier diode through sampling resistors R6 and R10. The device input
OVP function is activated when line sense current exceeds the OVP threshold. With
reference to the FEEDBACK (FB) pin threshold of 300 mV, R17 and R16 senses the
output LED current through U1 drain current and is then fed into the U1 DRIVER
CURRENT SENSE (DS) pin via R13 to maintain the output constant current regulation.
When the detected signal is above or below the preset average VFB threshold voltage, the
controller will adjust the frequency and/or on-time to maintain regulation. Capacitor C12
and R18 provide voltage filtering and input line compensation to the sense resistor for a
more optimized output current regulation throughout the input range. The IC U1
OUTPUT COMPENSATION (OC) pin senses the output voltage through the bias winding
via R9 (ROC) for the output OVP function at open load and for an optimized LED current
regulation throughout the output voltage range. When the OC pin current exceeds the
OV threshold, output OVP is activated with the IC latching off. This will prevent the
output voltage from rising further. An AC recycle is needed to reset this protection mode
once triggered. For wide-output LED applications, the ROC resistor (value) should be
centered between IOUV (output undervoltage) and IOOV (output overvoltage).
Page 11 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
5 PCB Layout
Figure 5 – Top Side.
Figure 6 – Bottom Side.
Note: The following component locations were unstuffed (not populated): R12, R1, R5, C3, and C9.
Power Integrations, Inc.
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Page 12 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
6 Bill of Materials
Item
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Ref
Des
BR1
C1
C2
C4
C5
C6
C7
C8
C10
C11
C12
D1
D2
D3
D4
F1
JP1
L1
L2
R2
R3
R4
R6
R7
R8
R9
R10
R11
R13
R14
R15
R16
33
1
R17
34
35
36
37
1
1
1
1
R18
RV1
T1
U1
Page 13 of 78
Description
1000 V, 0.8 A, Bridge Rectifier, SMD, MBS-1, 4-SOIC
1 nF, 1000 V, Ceramic, X7R, 0805
2.2 nF, Ceramic, Y1
220 nF, 450 V, Film
470 µF, 50 V, Electrolytic, Gen. Purpose, (12.5 x 20)
2.2 µF, 400 V, Electrolytic, (6.3 x 11)
10 µF, 50 V, Electrolytic, Gen. Purpose, (5 x 11)
100 nF, 400 V, Film
CAP, CER, 1 µF, 16V, X7R, 0805
150 nF, 25 V, Ceramic, X7R, 0603
10 µF, 10 V, Ceramic, X7R, 0805
800 V, 1 A, Fast Recovery, 250 ns, SMA
800 V, 1 A, Fast Recovery, 250 ns, SMA
300 V, 2 A, Ultrafast Recovery, 50 ns, SMB Case
600 V, 1 A, Rectifier, Glass Passivated, POWERDI123
5 A, 250 V, Fast, Microfuse, Axial
Wire Jumper, Non-insulated, #22 AWG, 0.5 in
5 mH, 0.3 A, Common Mode Choke
1.5 mH, 0.23 A, Ferrite Core
RES, 200 kΩ, 5%, 1/4 W, Thick Film, 1206
RES, 680 kΩ, 5%, 1/4 W, Thick Film, 1206
RES, 10 Ω, 5%, 1/4 W, Thick Film, 1206
RES, 2.00 MΩ, 1%, 1/4 W, Thick Film, 1206
RES, 51 kΩ, 5%, 1/4 W, Thick Film, 1206
RES, 10 Ω, 5%, 1/8 W, Thick Film, 0805
RES, 221 kΩ, 1%, 1/16 W, Thick Film, 0603
RES, 2.00 MΩ, 1%, 1/4 W, Metal Film
RES, 30.1 kΩ, 1%, 1/8 W, Thick Film, 0805
RES, 6.04 kΩ, 1%, 1/4 W, Thick Film, 1206
RES, 6.04 kΩ, 1%, 1/16 W, Thick Film, 0603
RES, 37.4 kΩ, 1%, 1/16 W, Thick Film, 0603
RES, 17.4 Ω, 1%, 1/8 W, Thick Film, 0805
RES, SMD, 3.6 Ω, 1%, 200 ppm, 1/2 W, 1206,
Automotive, AEC-Q200, Current Sense
RES, SMD, 4.75 Ω, 1%, 1/10 W, ±200 ppm/°C, 0603
275 V, 23 J, 7 mm, RADIAL
Bobbin, EE1621, Vertical, 8 pins, 4pri, 4sec
LYTSwitch-5, SO-16B, High voltage
Mfg Part Number
Manufacturer
B10S-G
C0805C102KDRACTU
440LD22-R
MEXXF32204JJ
UPW1H471MHD
TAB2GM2R2E110
EKMG500ELL100ME11D
ECQ-E4104KF
GRM21BR71C105KA01K
C1608X7R1E154K080AA
C2012X7R1A106M
RS1K-13-F
RS1K-13-F
ES2F-E3/52T
DFLR1600-7
0263005.MXL
298
SU9V-03050
CTCH895F-152K
ERJ-8GEYJ204V
ERJ-8GEYJ684V
ERJ-8GEYJ100V
ERJ-8ENF2004V
ERJ-8GEYJ513V
ERJ-6GEYJ100V
ERJ-3EKF2213V
RNF14FTD2M00
ERJ-6ENF3012V
ERJ-8ENF6041V
ERJ-3EKF6041V
ERJ-3EKF3742V
ERJ-6ENF17R4V
Comchip
Kemet
Vishay
Duratech
Nichicon
Ltec
Nippon Chemi-Con
Panasonic
Murata Electronics
TDK
TDK
Diodes, Inc.
Diodes, Inc.
Vishay
Diodes, Inc.
Littlefuse
Alpha
Tokin
CTParts
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Stackpole
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
ERJ-8BQF3R6V
Panasonic
RC0603FR-074R75L
V275LA4P
EE-1621
LYT5226D
Yageo
Littlefuse
Shen Zhen Xin Yu Jia Tech
Power Integrations
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
7 Inductor Specification
7.1 Electrical Diagram
4
FL1
17.5T
#31 AWG
8
18T
#28 TIW
FL2
38.5T
#31 AWG
3
1
13T
2X #34 AWG
2
Figure 7 – Inductor Electrical Diagram.
7.2 Electrical Specifications
Parameter
Nominal Primary
Inductance
Tolerance
Condition
Measured at 1 VPK-PK, 100 kHz switching frequency, between pin
1 and pin 2, with all other windings open.
Tolerance of primary inductance.
Spec.
420 µH
±5%
7.3 M aterial List
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
Description
Core: EE1621.
Bobbin, EE1621, Horizontal, 10 pins, Part no. 25-01044-00.
Magnet Wire: #31 AWG.
Magnet Wire: #34 AWG.
Triple Insulated Wire: #28 AWG.
Polyester Tape: 5.5 mm.
Transformer Tape: 6 mm.
Non-insulated Wire: #30 AWG.
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Page 14 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
7.4 I nductor Build Diagram
Finish (P4)
17.5 Turns
1 X AWG31
Start (P8)
Finish (FL2)
18 Turns
1 x TIW28
Start (FL1)
Finish (P2)
13 Turns
2 x AWG34
Start (P1)
Finish (P8)
38.5 Turns
1 x AWG31
Start (P3)
Figure 8 – Transformer Build Diagram.
7.5 I nductor Construction
Bobbin Modification
Winding Directions
Winding 1
Insulation
Winding 2
Insulation
Winding 3
Insulation
Winding 4
Insulation
Core Grinding
Assemble Core
Pins
Finish
Page 15 of 78
Cut the bobbin extension as shown on figure below.
Bobbin placed on winder jig such that terminal pin 1-4 is in the left side. The
winding direction is clockwise.
Use wire item [3], start at pin 3 and wind 38.5 turns in 2 layers, then finish the
winding on pin 8.
Add 1 layer of tape, item [6], for insulation.
Use wire item [4] in bifilar, start at pin 1 and wind 13 turns evenly from left to
right, then finish the winding on pin 2.
Add 1 layer of tape, item [6], for insulation.
Use wire item [5], allot 25 mm length for fly lead wire no.1 (mark as FL1) then
wind 18 turns from left to right, finished the winding with 25 mm length fly lead
wire no. 2 (mark as FL2).
Add 1 layer of tape, item [7], for insulation.
Use wire item [3], start at pin 8 and wind 17.5 turns in 1 layer, then finish the
winding on pin 4.
Add 1 layer of tape, item [6], for insulation.
Grind the center leg of one core until it meets the nominal inductance of 420 µH
with ±5% inductance tolerance.
Assemble the 2 cores on the bobbin with the gapped core place on top side of
the bobbin and the un-gapped core at the bottom side. Wrap the cores with tin
wire and terminate it to pin 4. Wrap the 2 cores with 2 layer of tape, item (6).
Pull out terminal pin no. 7
Dip the transformer assembly in varnish.
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
7.6 W inding I llustrations
Bobbin Modification
Cut the bobbin extension as shown in
the figure.
Winding Directions
Bobbin placed on winder jig such that
terminal pin 1-4 is in the left side. The
winding direction is clockwise.
Pin 1
Pin 3
Winding 1
Pin 4
Use wire item [3], start at pin 3 and
wind 38.5 turns in 2 layers, then finish
the winding on pin 8.
Insulation
Add 1 layer of tape, item [6], for
insulation.
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Page 16 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Winding 2
Use wire item [4] in bifilar, start at pin
1 and wind 13 turns evenly from left to
right, then finish the winding on pin 2.
Pin 1
Pin 2
Insulation
Add 1 layer of tape, item [6], for
insulation.
Page 17 of 78
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DER-528 14 W LED Driver Using LYT5226D
Winding 3
09-Mar-16
25 mm
Use wire item [5], allot 25 mm length
for fly lead wire no.1 (mark as FL1)
then wind 18 turns from left to right,
finish the winding with 25 mm Length
fly lead wire no. 2 (mark as FL2).
FL1- Start
FL2-Finished
FL1-Start
Insulation
Add 1 layer of tape, item [7], for
insulation.
Power Integrations, Inc.
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Page 18 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Winding 4
Use wire item [3], start at pin 8 and
wind 17.5 turns in 1 layer, then finish
the winding on pin 4.
Pin 8
Pin 4
Insulation
Add 1 layer of tape, item [6], for
insulation.
Page 19 of 78
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DER-528 14 W LED Driver Using LYT5226D
Assemble Core
09-Mar-16
Gapped Core
Assemble the 2 cores on the bobbin
with the gapped core placed on top
side of the bobbin and the un-gapped
core at the bottom side.
Pin 4
Wrap the cores with tin wire (item 8)
and terminate it to pin 4. Wrap the 2
cores with 2 layers of tape, item (7).
Finish
Dip the transformer assembly in 2:1
thinner and varnish solution.
Power Integrations, Inc.
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Page 20 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
8 Inductor Design Spreadsheet
ACDC LYTSwitch5
IsolatedFlyback
011916; Rev.1.0;
INPUT
INFO
Copyright Power
Integrations 2016
ENTER APPLICATION VARIABLES
VACMIN
90.0
VACNOM
VACMAX
265.0
FL
OUTPUT
UNITS
90.0
177.5
265.0
50
Volts RMS
Volts RMS
Volts RMS
Hertz
36.0
Volts DC
40.0
Volts DC
VO_OVP_MIN
52.7
Volts DC
IO
350.0
EFFICIENCY
0.87
Z
PO
LYTSwitch-5 DESIGN VARIABLES
BREAKDOWN
725
VOLTAGE
GENERIC DEVICE
LYT52X6D
ACTUAL DEVICE
ILIMITMIN
ILIMITTYP
ILIMITMAX
IP_MOSFET
TON_MIN
TON_MAX
IAVG_MOSFET
IRMS_MOSFET
350.0
0.87
0.50
14.00
m-Amperes
Dimensionless
Dimensionless
Watts
725
Volts DC
VO_MIN
VO
40.0
LYT52X6D
LYT5226D
1.767
1.900
2.033
1.319
1.327
3.887
0.167
0.320
Amperes
Amperes
Amperes
Amperes
u-seconds
u-seconds
Amperes
Amperes
KDP
1.123
Dimensionless
VDRAIN
DEVICE PROGRAMMING PARAMETERS
RDO
529.8
Volts DC
6
k-ohms
6
k-ohms
RDS
ENTER TRANSFORMER CONSTRUCTION VARIABLES
CORE TYPE
EE1621
EE1621
AE
33.77
33.77
LE
29.00
29.00
AL
2600
2600
VE
980
980
AW
15.00
15.00
BW
5.00
5.00
MARGIN
TRANSFORMER DESIGN PARAMETERS
Primary winding parameters
LP
420
LP_TOL
5
LP_MIN
LP_MAX
NP
ALG
BM
BP
Warning
Page 21 of 78
mm^2
mm
nH/T^2
mm^3
mm^2
mm
0.00
mm
420
5
399
441
56
133.93
3075
4741
u-Henrys
%
u-Henrys
u-Henrys
Turns
nH/T^2
Gauss
Gauss
LYTSwitch-5 Isolated Flyback Design
Spreadsheet
Minimum AC line voltage.
Nominal AC line voltage.
Maximum AC line voltage.
AC line frequency.
Guaranteed minimum VO that maintains output
regulation.
Worst case normal operating output voltage.
Minimum Voltage at which output voltage
protection may be activated.
Average output current specification.
Total power supply efficiency.
Loss allocation factor.
Output power.
Choose between 650V and 725V.
Chosen LYTSwitch-5 generic device.
Chosen LYTSwitch-5 device code.
Minimum device current limit.
Typical Current Limit.
Maximum Current Limit.
Worst case peak drain current of the MOSFET.
Worst case minimum on-time of the MOSFET.
Worst case maximum on-time of the MOSFET.
Worst case average drain current of the MOSFET.
Worst case maximum RMS current of the MOSFET.
Ratio between off-time of the MOSFET and on-time
of the secondary diode.
Estimated worst case drain voltage of the MOSFET.
DO pin resistor.
Current sense programming resistor connected to
the DS pin for the isolated flyback converter.
Core type.
Core effective cross sectional area.
Core effective path length.
Ungapped core effective inductance.
Core volume.
Window area of the bobbin.
Bobbin physical winding width.
Safety Margin Width (Half the Primary to Secondary
Creepage Distance)
Typical value of the primary inductance.
Tolerance of the primary inductance.
Minimum value of the primary inductance.
Maximum value of the primary inductance.
Number of primary turns.
Gapped core effective inductance.
Maximum flux density.
The peak flux density is higher than 4200 Gauss.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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DER-528 14 W LED Driver Using LYT5226D
BAC
LG
LAYERS_PRIMARY_D
ESIRED
AWG_PRIMARY
OD_PRIMARY_INSUL
ATED
31
09-Mar-16
1538
Gauss
0.3
mm
4
Dimensionless
31
AWG
0.272
mm
OD_PRIMARY_BARE
0.227
mm
IRMS_PRIMARY
0.320
Amperes
CMA_PRIMARY
J_PRIMARY
Secondary winding parameters
249
7.92
mils^2/Amperes
Amperes/mm^2
VOR
125
125
Volts DC
NS
AWG_SECONDARY
OD_SECONDARY_IN
SULATED
OD_SECONDARY_BA
RE
18
18
27
Dimensionless
Dimensionless
0.418
mm
0.361
mm
IRMS_SECONDARY
0.979
Amperes
CMA_SECONDARY
J_SECONDARY
Bias winding parameters
VD_BIAS
BIAS TURNS
206
9.59
mils^2/Amperes
Amperes/mm^2
0.70
13
Volts DC
Turns
VBIAS
28.0
Volts DC
PIVBS
132.4
Volts DC
CBIAS
22.0
u-Farads
RBP
25.00
k-Ohms
2.2
u-Farads
0.7
Volts DC
IRMS_DIODE
0.979
Amperes
IP_DIODE
4.103
Amperes
28.0
CBP
SECONDARY DIODE PARAMETERS
VF_DIODE
PIV_DIODE
190.4
Volts DC
FEEDBACK AND PROTECTION PARAMETERS WITH FINE TUNING
RL
4.00
4.00
M-Ohms
OVP_LINE
339.4
Volts RMS
RDC_THEORETICAL
RDC
2.40
2.43
Ohms
Ohms
CDC
10.0
u-Farads
30.0
Volts DC
VO_MEASURED
ROC
IO_ACTUAL
40.0
280.0
350.0
Volts DC
k-Ohms
m-Amperes
RFB_THEORETICAL
39.5
k-Ohms
VBIAS_MEASURED
30.0
Power Integrations, Inc.
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Increase the number of primary winding turns to
avoid core saturation.
Worst case AC Flux Density for Core Loss Curves
(0.5 X Peak to Peak).
Core gap length.
Desired number of primary layers.
Primary wire gauge.
Outer diameter of the primary winding wire with
insulation.
Outer diameter of the primary winding wire without
insulation.
Maximum RMS current flowing through the primary
winding.
Primary winding CMA.
Primary winding current density.
Output voltage reflected to the primary winding
when the MOSFET is off.
Number of secondary turns.
Secondary wire gauge.
Outer diameter of the secondary winding wire with
insulation.
Outer diameter of the secondary winding wire
without insulation.
Maximum RMS current flowing through the
secondary winding.
Secondary winding CMA.
Secondary winding current density.
Bias winding diode forward drop voltage.
Number of bias winding turns.
Bias Voltage. Check performance at minimum VO
and VACMAX.
Output Rectifier Maximum Peak Inverse Voltage
(calculated at VACMAX)
Bias winding rectification capacitor.
Bias supply resistor assuming 1mA current
necessary to supply the BP pin.
Minimum BP pin capacitance.
Output diode forward voltage drop.
Diode RMS current at LP_MIN, VACMIN and
PO_MAX.
Diode peak current at LP_MIN ,VACMAX and
PO_MAX.
Peak Inverse Voltage at VO_MAX on output diode.
Standard (E96 / 1%) L pin resistor.
Line overvoltage based on the actual L pin resistor
used.
Theoretical DS pin sense resistor.
Standard (E96 / 1%) DS pin sense resistor.
Standard capacitor connected in parallel with the
DS pin sense resistor.
Actual bias voltage (across the bias capacitor)
measured on the bench.
Actual load voltage measured on the bench.
Standard (E96 / 1%) OC pin resistor.
Actual output current seen on the bench.
Calculated value of RFB, using standard values for
RDS, ROVP, and RL
Page 22 of 78
09-Mar-16
RFB
CFB
Page 23 of 78
DER-528 14 W LED Driver Using LYT5226D
39.2
150.0
k-Ohms
n-Farads
Standard (E96 / 1%) F pin resistor.
Standard capacitor connected to the F pin.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
9 Performance Data
All measurements were performed at room temperature using LED load string. 1 minute
soak time was applied before measurement with AC source turned-off for 5 seconds
every succeeding input line measurement.
9.1 Efficiency
90
40 V LED
30 V LED
20 V LED
89
35 V LED
25 V LED
Efficiency (%)
88
87
86
85
84
83
82
80
100
120
140
160
180
200
220
240
260
280
Input Voltage (VAC)
Figure 9 – Efficiency vs. Line and LED Load.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 24 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
9.2 Line R egulation
370
40 V LED
30 V LED
20 V LED
366
35 V LED
25 V LED
5%
4%
Output Current (mA)
3%
362
2%
1%
358
0%
354
-1%
-2%
350
-3%
346
-4%
-5%
342
80
100
120
140
160
180
200
220
240
260
Input Voltage (VAC)
Figure 10 – Regulation vs. Line and LED Load.
Page 25 of 78
Power Integrations
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280
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
9.3 P ow er Factor
1.00
40 V LED
30 V LED
20 V LED
0.98
35 V LED
25 V LED
0.96
Power Factor
0.94
0.92
0.90
0.88
0.86
0.84
0.82
0.80
80
100
120
140
160
180
200
220
240
260
280
Input Voltage (VAC)
Figure 11 – Power Factor vs. Line and LED Load.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 26 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
9.4 % ATHD
36
40 V LED
30 V LED
20 V LED
32
35 V LED
25 V LED
28
ATHD (%)
24
20
16
12
8
4
0
80
100
120
140
160
180
200
220
240
260
Input Voltage (VAC)
Figure 12 – %ATHD vs. Line and LED Load.
Page 27 of 78
Power Integrations
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280
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
9.5 P ow er I nput Difference Betw een 120 V to 230 V
0.20
Input Power Difference (W)
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
20
22
24
26
28
30
32
34
36
38
40
Output LED Voltage (V)
Figure 13 – Power Input Difference between 120 V and 230 V.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 28 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
9.6 I ndividual Harm onics Content
60
Harmonic Content
Class C Limit
Harmonic Content (mA)
50
40
30
20
10
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 14 – 40 V LED Load Input Current Harmonics at 230 VAC, 50 Hz.
Page 29 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
120
09-Mar-16
Harmonic Content
Class C Limit
Harmonic Content (mA)
100
80
60
40
20
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 15 – 40 V LED Load Input Current Harmonics at 115 VAC, 60 Hz.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 30 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
45
Harmonic Content
Class C Limit
40
Harmonic Content (mA)
35
30
25
20
15
10
5
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 16 – 30 V LED Load Input Current Harmonics at 230 VAC, 50 Hz.
Page 31 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
90
Harmonic Content
Class C Limit
80
Harmonic Content (mA)
09-Mar-16
70
60
50
40
30
20
10
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 17 – 30 V LED Load Input Current Harmonics at 115 VAC, 60 Hz.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 32 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
35
Harmonic Content
Class C Limit
Harmonic Content (mA)
30
25
20
15
10
5
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 18 – 20 V LED Load Input Current Harmonics at 230 VAC, 50 Hz.
Page 33 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
70
09-Mar-16
Harmonic Content
Class C Limit
Harmonic Content (mA)
60
50
40
30
20
10
0
3
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39
Odd Harmonic Content
Figure 19 – 20 V LED Load Input Current Harmonics at 115 VAC, 60 Hz.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 34 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
10 Test Data
10.1 Test Data, 40 V LED Load
Input
VAC
Freq
(VRMS) (Hz)
90
60
100
60
115
60
120
60
132
60
195
50
200
50
220
50
230
50
240
50
265
50
VIN
(VRMS)
89.86
99.87
114.87
119.91
131.92
194.93
199.89
219.93
229.95
239.97
264.98
Input Measurement
IIN
PIN
PF %ATHD
(mARMS) (W)
186.90
16.70 0.99
6.50
165.30
16.40 0.99
5.82
144.68
16.47 0.99
6.04
137.82
16.37 0.99
5.54
125.31
16.33 0.99
5.91
86.18
16.30 0.97
8.03
84.15
16.28 0.97
8.37
77.32
16.27 0.96
9.98
74.33
16.25 0.95
11.17
71.77
16.27 0.94
12.24
66.23
16.27 0.93
15.38
LED Load Measurement
VOUT
IOUT
POUT
(VDC)
(mADC)
(W)
40.09
355.81
14.28
39.92
353.41
14.13
39.98
356.77
14.28
39.95
355.87
14.24
39.96
356.40
14.26
39.99
358.37
14.36
39.98
358.03
14.34
39.98
358.24
14.35
39.97
357.84
14.33
39.98
358.14
14.34
39.97
357.93
14.33
Efficiency
(%)
85.52
86.11
86.74
86.99
87.33
88.12
88.09
88.19
88.18
88.16
88.08
10.2 Test Data, 35 V LED Load
Input
VAC
Freq
(VRMS) (Hz)
90
60
100
60
115
60
120
60
132
60
195
50
200
50
220
50
230
50
240
50
265
50
Page 35 of 78
VIN
(VRMS)
89.81
99.83
114.89
119.94
131.92
194.93
199.90
219.93
229.95
239.97
264.98
Input Measurement
IIN
PIN
PF %ATHD
(mARMS) (W)
167.14
14.92 0.99
6.43
148.61
14.73 0.99
5.70
129.48
14.72 0.99
5.86
123.67
14.66 0.99
5.61
112.47
14.62 0.99
5.81
77.70
14.60 0.96
8.69
75.90
14.58 0.96
9.15
69.99
14.60 0.95
11.24
67.33
14.57 0.94
12.60
65.12
14.61 0.93
13.74
60.25
14.60 0.91
17.40
LED Load Measurement
VOUT
IOUT
POUT
(VDC)
(mADC)
(W)
35.78
356.46
12.78
35.69
355.13
12.69
35.71
357.09
12.78
35.70
356.79
12.76
35.69
356.86
12.76
35.72
358.35
12.83
35.71
358.18
12.82
35.71
358.36
12.83
35.69
357.89
12.80
35.70
358.53
12.83
35.69
358.05
12.81
Efficiency
(%)
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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85.65
86.19
86.78
87.00
87.28
87.88
87.92
87.85
87.87
87.82
87.73
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
10.3 Test Data, 30 V LED Load
Input
VAC
Freq
(VRMS) (Hz)
90
60
100
60
115
60
120
60
132
60
195
50
200
50
220
50
230
50
240
50
265
50
VIN
(VRMS)
89.83
99.85
114.86
119.90
131.91
194.93
199.91
219.94
229.96
239.97
264.99
Input Measurement
IIN
PIN
PF %ATHD
(mARMS) (W)
143.60
12.81 0.99
5.55
127.46
12.61 0.99
5.42
110.47
12.52 0.99
5.85
105.68
12.48 0.99
5.74
95.92
12.41 0.98
6.40
66.95
12.43 0.95
10.17
65.47
12.41 0.95
10.90
60.39
12.40 0.93
13.56
58.46
12.44 0.93
15.02
56.40
12.40 0.92
16.63
52.59
12.44 0.89
20.82
LED Load Measurement
VOUT
IOUT
POUT
(VDC)
(mADC)
(W)
30.42
359.93
10.98
30.28
357.80
10.86
30.26
357.80
10.85
30.24
357.43
10.83
30.21
356.55
10.80
30.22
358.01
10.86
30.21
357.76
10.84
30.19
357.28
10.82
30.20
358.20
10.85
30.17
357.07
10.81
30.18
357.52
10.82
Efficiency
(%)
85.71
86.13
86.69
86.79
87.03
87.34
87.38
87.27
87.25
87.17
87.00
10.4 Test Data, 25 V LED Load
Input
VAC
Freq
(VRMS) (Hz)
90
60
100
60
115
60
120
60
132
60
195
50
200
50
220
50
230
50
240
50
265
50
VIN
(VRMS)
89.89
99.91
114.90
119.96
131.94
194.95
199.91
219.95
229.96
239.98
265.00
Input Measurement
IIN
PIN
PF %ATHD
(mARMS) (W)
118.21
10.53 0.99
5.15
105.90
10.45 0.99
5.41
91.85
10.36 0.98
5.75
88.09
10.35 0.98
6.27
80.24
10.30 0.97
7.02
56.80
10.36 0.94
12.48
55.66
10.37 0.93
13.36
51.67
10.37 0.91
16.73
49.95
10.36 0.90
18.51
48.53
10.39 0.89
20.30
45.39
10.40 0.86
25.18
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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LED Load Measurement
VOUT
IOUT
POUT
(VDC)
(mADC)
(W)
25.10
357.19
9.00
25.05
357.07
8.98
25.02
355.81
8.93
25.02
355.79
8.93
25.01
355.34
8.92
25.02
356.88
8.97
25.02
357.06
8.98
25.01
356.67
8.96
25.01
356.28
8.95
25.01
356.53
8.96
25.00
356.35
8.95
Efficiency
(%)
85.48
85.91
86.24
86.33
86.55
86.58
86.56
86.42
86.38
86.19
86.03
Page 36 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
10.5 Test Data, 20 V LED Load
Input
VAC
Freq
(VRMS) (Hz)
90
60
100
60
115
60
120
60
132
60
195
50
200
50
220
50
230
50
240
50
265
50
VIN
(VRMS)
89.88
99.91
114.90
119.95
131.93
194.94
199.91
219.94
229.96
239.98
264.99
Input Measurement
IIN
PIN
PF %ATHD
(mARMS) (W)
97.92
8.69 0.99
4.88
87.44
8.58 0.98
5.70
75.99
8.51 0.97
6.66
73.05
8.51 0.97
6.94
66.87
8.49 0.96
8.11
47.94
8.54 0.91
15.80
47.02
8.54 0.91
16.62
43.86
8.54 0.89
20.72
42.62
8.56 0.87
22.88
41.42
8.56 0.86
25.07
38.96
8.58 0.83
30.47
LED Load Measurement
VOUT
IOUT
POUT
(VDC)
(mADC)
(W)
20.44
359.07
7.38
20.36
357.62
7.32
20.34
355.82
7.28
20.33
356.13
7.28
20.33
355.82
7.27
20.33
35645
7.30
20.33
356.35
7.30
20.32
355.83
7.28
20.32
356.26
7.29
20.31
355.69
7.27
20.31
355.63
7.27
Efficiency
(%)
10.6 Test Data, P ow er I nput Difference Betw een 120 V and 230 V
Page 37 of 78
LED Voltage
(V)
Input Power Difference
(W)
42.00
0.03
39.00
0.01
35.00
0.01
32.00
0.00
28.00
0.12
25.00
0.12
21.00
0.15
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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84.94
85.34
85.54
85.59
85.71
85.45
85.43
85.26
85.15
84.98
84.72
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
10.7 Test Data, Harm onic Content at 230 VAC w ith 40 V LED Load
VIN
(VRMS)
230
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Freq
50
mA
Content
73.25
0.08
3.71
3.48
3.05
2.75
2.31
1.73
1.59
1.24
0.93
0.64
1.27
0.59
0.91
0.50
1.10
1.28
0.76
0.57
0.56
IIN
(mARMS)
73.24
%
Content
PIN
(W)
15.986
mA Limit
<25 W
0.11%
5.06%
4.75%
4.16%
3.75%
3.15%
2.36%
2.17%
1.69%
1.27%
0.87%
1.73%
0.81%
1.24%
0.68%
1.50%
1.75%
1.04%
0.78%
0.76%
55.25
30.88
16.25
8.13
5.69
4.81
4.17
3.68
3.29
2.98
2.72
2.50
2.32
2.16
2.02
1.90
1.79
1.69
1.60
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
%THD
11.377
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Page 38 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
10.8 Test Data, Harm onic Content at 115 VAC w ith 40 V LED Load
VIN
(VRMS)
115
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Page 39 of 78
Freq
60
mA
Content
136.89
0.16
1.19
1.70
1.34
1.59
2.65
1.65
0.98
0.92
1.37
0.96
1.00
1.20
0.86
1.05
2.40
2.83
1.02
0.79
1.05
IIN
(mARMS)
144.68
%
Content
PIN
(W)
16.468
mA Limit
<25 W
0.12%
0.87%
1.24%
0.98%
1.16%
1.94%
1.21%
0.72%
0.67%
1.00%
0.70%
0.73%
0.88%
0.63%
0.77%
1.75%
2.07%
0.75%
0.58%
0.77%
111.98
62.58
32.94
16.47
11.53
9.75
8.45
7.46
6.67
6.04
5.51
5.07
4.70
4.37
4.09
3.84
3.62
3.43
3.25
%THD
6.04
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
10.9 Test Data, Harm onic Content at 230 VAC w ith 30 V LED Load
VIN
(VRMS)
230
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Freq
50
mA
Content
57.14
0.06
4.63
4.16
3.40
2.64
1.99
1.41
1.21
1.10
1.12
0.66
1.19
0.66
0.85
0.54
0.84
0.94
0.60
0.61
0.47
IIN
(mARMS)
58.49
%
Content
PIN
(W)
12.440
mA Limit
<25 W
0.11%
8.10%
7.28%
5.95%
4.62%
3.48%
2.47%
2.12%
1.93%
1.96%
1.16%
2.08%
1.16%
1.49%
0.95%
1.47%
1.65%
1.05%
1.07%
0.82%
42.30
23.64
12.44
6.22
4.35
3.68
3.19
2.82
2.52
2.28
2.08
1.92
1.77
1.65
1.54
1.45
1.37
1.29
1.23
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
%THD
15.015
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Page 40 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
10.10 Test Data, Harm onic Content at 115 VAC w ith 30 V LED Load
VIN
(VRMS)
115
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Page 41 of 78
Freq
60
mA
Content
109.34
0.19
1.25
2.11
2.03
0.84
2.09
1.22
1.80
1.56
0.90
0.83
0.45
0.61
1.04
0.32
2.25
1.77
0.84
0.48
0.28
IIN
(mARMS)
110.26
%
Content
PIN
(W)
12.498
mA Limit
<25 W
0.17%
1.14%
1.93%
1.86%
0.77%
1.91%
1.12%
1.65%
1.43%
0.82%
0.76%
0.41%
0.56%
0.95%
0.29%
2.06%
1.62%
0.77%
0.44%
0.26%
84.99
47.49
25.00
12.50
8.75
7.40
6.42
5.66
5.06
4.58
4.18
3.85
3.56
3.32
3.10
2.92
2.75
2.60
2.47
%THD
5.825
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
10.11 Test Data, Harm onic Content at 230 VAC w ith 20 V LED Load
VIN
(VRMS)
230
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Freq
50
mA
Content
40.70
0.04
6.10
4.83
3.23
2.05
1.73
1.26
1.57
0.94
1.18
0.71
0.96
0.81
0.67
0.74
0.51
0.92
0.40
0.67
0.39
IIN
(mARMS)
42.63
%
Content
PIN
(W)
8.560
mA Limit
<25 W
0.10%
14.99%
11.87%
7.94%
5.04%
4.25%
3.10%
3.86%
2.31%
2.90%
1.74%
2.36%
1.99%
1.65%
1.82%
1.25%
2.26%
0.98%
1.65%
0.96%
29.10
16.26
8.56
4.28
3.00
2.54
2.20
1.94
1.73
1.57
1.43
1.32
1.22
1.14
1.06
1.00
0.94
0.89
0.85
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
%THD
22.82
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Page 42 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
10.12 Test Data, Harm onic Content at 115 VAC w ith 20 V LED Load
VIN
(VRMS)
115
nth
Order
1
2
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Page 43 of 78
Freq
60
mA
Content
74.99
0.10
1.59
1.58
1.28
1.64
1.08
1.04
1.21
0.50
1.08
1.41
0.29
0.44
0.93
0.70
1.45
1.12
0.55
0.46
0.36
IIN
(mARMS)
75.97
%
Content
PIN
(W)
8.503
mA Limit
<25 W
0.13%
2.12%
2.11%
1.71%
2.19%
1.44%
1.39%
1.61%
0.67%
1.44%
1.88%
0.39%
0.59%
1.24%
0.93%
1.93%
1.49%
0.73%
0.61%
0.48%
57.82
32.31
17.01
8.50
5.95
5.04
4.36
3.85
3.45
3.12
2.85
2.62
2.42
2.26
2.11
1.98
1.87
1.77
1.68
%THD
6.588
Remarks
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
11 Thermal Performance
11.1 Thermal Performance Scan – Open Frame Unit
Figure 20 – Test Set-up Picture - Open Frame.
Unit in open frame was placed inside an acrylic enclosure to prevent airflow that might
affect the thermal measurements. Temperature was measured using FLIR thermal
camera.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 44 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
11.1.1 Thermal Scan
Figure 21 – 230 VAC, 40 V LED Load.
Spot 1: LYT5226D (U1): 75.1 ºC.
Figure 22 – 115 VAC, 40 V LED Load.
Spot 1: LYT5226D (U1): 81.7 ºC.
Figure 23 – 230 VAC, 40 V LED Load.
Spot 1: Output Diode (D3): 66.4 ºC.
Figure 24 – 115 VAC, 40 V LED Load.
Spot 1: Output Diode (D3): 65.5 ºC.
Page 45 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 25 – 230 VAC, 40 V LED Load.
Spot 1: Snubber Diode (D2): 69.9 ºC.
Figure 26 – 115 VAC, 40 V LED Load.
Spot 1: Snubber Diode (D2): 71.6 ºC.
Figure 27 – 230 VAC, 40 V LED Load.
Spot 1: Bridge Diode (BR1): 42.9 ºC.
Figure 28 – 115 VAC, 40 V LED Load.
Spot 1: Bridge Diode (BR1): 52.5 ºC.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 46 of 78
09-Mar-16
Figure 29 – 230 VAC, 40 V LED Load.
Spot 1: Bias Diode (D4): 64.1 ºC.
DER-528 14 W LED Driver Using LYT5226D
Figure 30 – 115 VAC, 40 V LED Load.
Spot 1: Bias Diode (D4): 64.8 ºC.
11.1.2 Thermal Scan at the Top Side
Figure 31 – 230 VAC, 40 V LED Load.
Spot 1: Transformer (T1): 66.6 ºC.
Page 47 of 78
Figure 32 –115 VAC, 40 V LED Load.
Spot 1: Transformer (T1): 65.4 ºC.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
11.2 Thermal Performance at 85 ºC
Figure 33 – Test Set-up Picture Thermal at 85 ºC Ambient - Open Frame.
Unit in open frame was placed inside the enclosure to prevent airflow that might affect
the thermal measurements. Ambient temperature inside enclosure is 85 ºC. Temperature
was measured using Type T thermocouple.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 48 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Temperature (0C)
11.2.1 Thermal Performance at 230 VAC with a 40 V LED Load
150
145
140
135
130
125
120
115
110
105
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
LYT5
D2
T1
D3
Ambient
0
20
40
60
80
Burn-in Time (Min)
Figure 34 – Component Temperature at 230 VAC, 85 ºC Ambient
Page 49 of 78
Measurement
Ambient
D2
T1
LYTSwitch-5
D3
Maximum (ºC)
86.0
120.6
115.9
128.8
109.6
Final (ºC)
85.8
120.4
115.8
128.6
109.5
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
11.2.2 Thermal Performance at 120 VAC with a 40 V LED Load
150
140
130
Temperature (0C)
120
110
100
90
80
70
60
50
LYT5
D2
40
T1
D3
30
Ambient
20
0
20
40
60
80
Burn-in Time (Min)
Figure 35 – Component Temperature at 230VAC, 85 ºC Ambient.
Measurement
Ambient
D2
T1
LYTSwitch-5
D3
Maximum (ºC)
85.4
120.3
116.2
128.9
109.9
Final (ºC)
85.0
120.1
116.1
128.6
109.9
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 50 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
12 Waveforms
12.1 I nput Voltage and I nput Current W aveform s
Figure 36 – 90 VAC, 40 V LED Load.
Upper: IIN, 100 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 37 – 115 VAC, 40 V LED Load.
Upper: IIN, 100 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 38 – 230 VAC, 40 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 39 – 265 VAC, 40 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Page 51 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 40 – 90 VAC, 32 V LED Load.
Upper: IIN, 100 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 41 – 115 VAC, 32 V LED Load.
Upper: IIN, 100 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 42 – 230 VAC, 32 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 43 – 265 VAC, 32 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 52 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 44 – 90 VAC, 21 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 45 – 115 VAC, 21 V LED Load.
Upper: IIN, 50 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 46 – 230 VAC, 20 V LED Load.
Upper: IIN, 40 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Figure 47 – 265 VAC, 20 V LED Load.
Upper: IIN, 40 mA / div.
Lower: VIN, 100 V / div., 10 ms / div.
Page 53 of 78
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.2 Output Current R ise
Figure 48 – 90 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 49 – 90 VAC, 40 V LED Load, Zoom View.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 50 – 115 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 51 – 115 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 54 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 52 – 230 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 53 – 230 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 54 – 265 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 55 – 265 VAC, 40 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Page 55 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 56 – 90 VAC, 20 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 57 – 115 VAC, 20 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 58 – 115 VAC, 20 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 59 – 115 VAC, 20 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 56 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 60 – 230 VAC, 21 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 61 – 230 VAC, 21 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 62 – 265 VAC, 21 V LED Load, Output Rise.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 500 ms / div.
Figure 63 – 265 VAC, 21 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Page 57 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.3 Output Current Fall
Figure 64 – 90 VAC, 40 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 65 – 115 VAC, 40 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 66 – 230 VAC, 40 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 67 – 265 VAC, 40 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 58 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 68 – 90 VAC, 21 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 69 – 115 VAC, 21 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 70 – 230 VAC, 21 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Figure 71 – 265 VAC, 21 V LED Load, Output Fall.
Upper: IOUT, 100 mA / div.
Lower: VIN, 100 V / div., 100 ms / div.
Page 59 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.4 Drain Voltage and Current in Norm al Operation
Figure 72 – 90 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 73 – 90 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Figure 74 – 115 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 75 – 115 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
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Page 60 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 76 – 230 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 77 – 230 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Figure 78 – 265 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 79 – 265 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Page 61 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 80 – 90 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 81 – 90 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Figure 82 – 115 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 83 – 115 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.power.com
Page 62 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 84 – 230 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 85 – 230 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Figure 86 – 265 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 ms / div.
Figure 87 – 265 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 100 V / div., 4 µs / div.
Page 63 of 78
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.5 Drain Voltage and Current Start-up P rofile
Figure 88 – 90 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 50 V / div., 40 ms /div.
Figure 89 – 90 VAC, 40 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 50 V / div., 4 µs /div.
Figure 90 – 265 VAC, 40 V LED Load.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 100 V / div., 40 ms /div.
Figure 91 – 265 VAC, 40 V LED Load.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 100 V / div., 5 µs /div.
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09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 92 – 90 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 50 V / div., 40 ms /div.
Figure 93 – 90 VAC, 20 V LED Load.
Upper: IDRAIN, 200 mA / div.
Lower: VDRAIN, 50 V / div., 4 µs /div.
Figure 94 – 265 VAC, 20 V LED Load.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 100 V / div., 40 ms /div.
Figure 95 – 265 VAC, 20 V LED Load.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 100 V / div., 5 µs /div.
Page 65 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.6 Drain Voltage and Current during Output Short-Circuit Condition
Figure 96 – 90 VAC, Output Short.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 50 V / div., 1 s / div.
Figure 97 – 90 VAC, Output Short.
Upper: IDRAIN, 400 mA / div.
Lower: VDRAIN, 50 V / div., 1 µs / div.
Figure 98 – 265 VAC, Output Short.
Upper: IDRAIN, 500 mA / div.
Lower: VDRAIN, 100 V / div., 1 s / div.
Figure 99 – 265 VAC, Output Short.
Upper: IDRAIN, 500 mA / div.
Lower: VDRAIN, 100 V / div., 1 µs / div.
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Page 66 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
12.7 Output Diode Voltage and Current in Norm al Operation
Figure 100 – 90 VAC, 40 V LED Load.
Upper: ID3, 1 A / div.
Lower: VD3, 20 V / div., 4 ms / div.
Figure 101 – 90 VAC, 40 V LED Load.
Upper: ID3, 1A / div.
Lower: VD3, 20 V / div., 4 µs / div.
Figure 102 – 265 VAC, 40 V LED Load.
Upper: ID3, 1 A / div.
Lower: VD3, 40 V / div., 4 ms / div.
Figure 103 – 265 VAC, 40 V LED Load.
Upper: IDRAIN, 1A / div.
Lower: VDRAIN, 40 V / div., 4 µs / div.
Page 67 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
12.8 Output Voltage and Current – Open LED Load
Figure 104 – 90 VAC, 40 V LED Load,
Running Open Load.
Upper: IOUT, 50 mA / div.
Lower: VOUT, 10 V / div., 10 s / div.
Figure 105 – 265 VAC, 40 V LED Load,
Running Open Load.
Upper: IOUT, 50 mA / div.
Lower: VOUT, 10 V / div., 10 s / div.
12.9 Output Voltage and Current – Start-up w ith Open Load
Figure 106 – 90 VAC, Open Load,
Open Load Start-up.
Upper: IOUT, 50 mA / div.
Lower: VOUT, 10 V / div., 10 s / div.
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Figure 107 – 265 VAC, Open Load
Open Load Start-up.
Upper: IOUT, 50 mA / div.
Lower: VOUT, 10 V / div., 10 s / div.
Page 68 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
12.10 Output R ipple Current
Figure 108 – 90 VAC, 50 Hz, 40 V LED Load.
Upper: IOUT, 50 mA / div., 5 ms / div.
Figure 109 – 115 VAC, 60 Hz, 40 V LED Load.
Upper: IOUT, 50 mA / div., 5 ms / div.
Figure 110 – 230 VAC, 50 Hz, 40 V LED Load.
Upper: IOUT, 50 mA / div., 5 ms / div.
Figure 111 – 265 VAC, 50 Hz, 40 V LED Load.
Upper: IOUT, 50 mA / div., 5 ms / div.
VIN
IO(MAX)
(mA)
IO(MIN)
(mA)
IMEAN
Ripple Ratio
(IRP-P/IMEAN)
90 VAC
115 VAC
230 VAC
265 VAC
400.58
398.6
408.49
406.51
311.65
311.65
309.67
307.7
352.23
351.23
355.31
354.08
0.25
0.25
0.28
0.28
Page 69 of 78
% Flicker
100 x (IRP-P /
IO(MAX)+IO(MIN))
12.49
12.24
13.76
13.83
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
13 AC Cycling Test
No output current overshoot was observed during on - off cycling.
Figure 112 – 115 VAC, 40 V LED Load.
1 s On – 1 s Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 50 V / div., 4 s / div.
Figure 113 – 115 VAC, 40 V LED Load.
500 ms On – 500 ms Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 50 V / div., 2 s / div.
Figure 114 – 115 VAC, 20 V LED Load.
1 s On – 1 s Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 50 V / div., 4 s / div.
Figure 115 – 115 VAC, 20 V LED Load.
500 ms On – 500 ms Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 50 V / div., 2 s / div.
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Page 70 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
Figure 116 – 230 VAC, 40 V LED Load.
1 s On – 1 s Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 100 V / div., 4 s / div.
Figure 117 – 230 VAC, 40 V LED Load.
500 ms On – 500 ms Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 100 V / div., 2 s / div.
Figure 118 – 230 VAC, 20 V LED Load.
1 s On – 1 s Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 100 V / div., 4 s / div.
Figure 119 – 230 VAC, 20 V LED Load.
500 ms On – 500 ms Off.
Upper: IOUT, 50 mA / div.
Lower: VIN, 100 V / div., 2 s / div.
Page 71 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
14 Conducted EMI
14.1 Test Set-up
14.1.1 Equipment and Load Used
1. Rohde and Schwarz ENV216 two line V-network.
2. Rohde and Schwarz ESRP EMI test receiver.
3. Hioki 3322 power hitester.
4. Chroma measurement test fixture.
5. LED load string
Figure 120 – Conducted EMI Test Set-up.
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09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
14.2 EM I Test R esult
Figure 121 – Conducted EMI QP Scan at 40 V LED Load, 230 VAC, 50 Hz, and EN55015 B Limits.
Figure 122 – Conducted EMI QP Data at 40 V LED Load, 230 V / 50 Hz.
Page 73 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
Figure 123 – Conducted EMI QP Scan at 40 V LED Load, 115 VAC, 50 Hz, and EN55015 B Limits.
Figure 124 – Conducted EMI QP Data at 40 V LED Load, 115 V / 50 Hz.
Power Integrations, Inc.
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Page 74 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
15 Line Surge
The unit was subjected to ±2500 V, 100 kHz ring wave and ±1000 V differential surge
using 10 strikes at each condition. A test failure was defined as a non-recoverable
interruption of output requiring repair or recycling of input voltage.
Surge
Level (V)
+1000
-1000
+1000
-1000
Surge
Level (V)
+2500
-2500
+2500
-2500
Input
Voltage
(VAC)
230
230
230
230
Input
Voltage
(VAC)
230
230
230
230
Injection
Location
L
L
L
L
to
to
to
to
N
N
N
N
Injection
Location
L
L
L
L
to
to
to
to
N
N
N
N
Injection
Phase (°)
Test Result
(Pass/Fail)
0
0
90
90
Pass
Pass
Pass
Pass
Injection
Phase (°)
Test Result
(Pass/Fail)
0
0
90
90
Pass
Pass
Pass
Pass
Figure 125 – +1000 kV Differential Surge, 90º Phase Angle
Lower: VDRAIN, 100 V / div., 5 µs / div.
Peak VDRAIN: 671.6 V.
Page 75 of 78
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
16 Brown-in/Brown-out Test
No failure of any component was seen during brownout test AC cut-in and cut-off.
Figure 126 – Brown-in Test at 0.5 V / s. The Unit is
Able to Operate Normally Without Any
Failure and Without Flicker.
Ch4: VIN, 100 V / div.
Ch3: IOUT, 50 mA / div.
Time Scale: 50 s / div.
Figure 127 – Brown-out Test at 0.5 V / s. The Unit is
Able to Operate Normally Without Any
Failure and Without Flicker.
Ch4: VIN, 100 V / div.
Ch3: IOUT, 50 mA / div.
Time Scale: 50 s / div.
Figure 128 – Brown-in Test at 1 V / s. The Unit is
Able to Operate Normally Without Any
Failure and Without Flicker.
Ch4: VIN, 100 V / div.
Ch3: IOUT, 50 mA / div.
Time Scale: 40 s / div.
Figure 129 – Brown-out Test at 1 V / s. The Unit is
Able to Operate Normally Without Any
Failure and Without Flicker.
Ch4: VIN, 100 V / div.
Ch3: IOUT, 50 mA / div.
Time Scale: 40 s / div.
Power Integrations, Inc.
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Page 76 of 78
09-Mar-16
DER-528 14 W LED Driver Using LYT5226D
17 Revision History
Date
05-March-16
Page 77 of 78
Author
MGM
Revision
1.0
Description and Changes
Initial release
Reviewed
Apps & Mktg
Power Integrations
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DER-528 14 W LED Driver Using LYT5226D
09-Mar-16
For the latest updates, visit our website: www.power.com
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power
Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES
NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
Patent Information
The products and applications illustrated herein (including transformer construction and circuits’ external to the products) may be covered
by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations.
A complete list of Power Integrations’ patents may be found at www.power.com. Power Integrations grants its customers a license under
certain patent rights as set forth at http://www.power.com/ip.htm.
The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, LYTSwitch, InnoSwtich, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS,
Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, FluxLink, StackFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks
are property of their respective companies. ©Copyright 2015 Power Integrations, Inc.
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Page 78 of 78