AN- EVAL- 3 RBR06 65 JZ
30W 12V SMPS e va l uat ion boar d
wit h I CE3RB R0665J Z
Appl icat ion Not e AN - EVAL- 3RB R0665JZ
V1. 0 , 2014- 07- 22
Po wer Manag em ent & Mult im ar k et
Edition 2014-07-22
Published by Infineon Technologies AG,
81726 Munich, Germany.
© 2014 Infineon Technologies AG
All Rights Reserved.
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Information
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Trademarks of Infineon Technologies AG
AURIX™, C6 6™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™,
CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™, EconoBRIDGE™, EconoDUAL™,
EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™,
ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™, ORIGA™,
POWERCODE™; PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™,
ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™,
TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™.
Other Trademarks
Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™,
PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by
AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum.
COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™
of Epcos AG. FLEXGO™ of Microsoft Corporation. FlexRay™ is licensed by FlexRay Consortium.
HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale. IrDA™
of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR
STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc.
MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS
Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of
Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc. Openwave™ Openwave Systems
Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Satellite Radio Inc.
SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software
Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc.
TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™
of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™
of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.
Last Trademarks Update 2011-11-11
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Revision History
ANEVAL_201406_PL21_003
Major changes since previous revision
Date
Version
Changed By
Change Description
22 Jul 2014
1.0
Kyaw Zin Min
Release of final version
We Listen to Your Comments
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Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Table of Contents
Revision History .............................................................................................................................................. 4
Table of Contents ............................................................................................................................................ 5
1
Abstract ........................................................................................................................................ 7
2
Evaluation board .......................................................................................................................... 7
3
Evaluation board specification .................................................................................................... 8
4
List of feature (ICE3RBR0665JZ) ................................................................................................. 8
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
Circuit description ....................................................................................................................... 9
Introduction .................................................................................................................................... 9
Line input ....................................................................................................................................... 9
Start up .......................................................................................................................................... 9
Operation mode ............................................................................................................................. 9
Soft start ........................................................................................................................................ 9
DZD clamper circuit........................................................................................................................ 9
Peak current control of primary current ........................................................................................... 9
Output stage .................................................................................................................................. 9
Feedback and regulation .............................................................................................................. 10
Blanking window for load jump ..................................................................................................... 10
Active burst mode ........................................................................................................................ 10
Jitter mode ................................................................................................................................... 10
Protection modes ......................................................................................................................... 10
6
Circuit diagram........................................................................................................................... 12
7
7.1
7.2
PCB layout.................................................................................................................................. 13
Top side ....................................................................................................................................... 13
Bottom side .................................................................................................................................. 13
8
Component list ........................................................................................................................... 14
9
Transformer construction .......................................................................................................... 15
10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
Test results................................................................................................................................. 16
Efficiency ..................................................................................................................................... 16
Input standby power ..................................................................................................................... 17
Line regulation ............................................................................................................................. 18
Load regulation ............................................................................................................................ 18
Maximum input power .................................................................................................................. 19
Electrostatic discharge/ESD test (EN6100-4-2)............................................................................. 19
Surge/Lightning strike test (EN61000-4-5) .................................................................................... 19
Conducted emissions (EN55022 class-B) ..................................................................................... 20
Thermal measurement ................................................................................................................. 22
11
11.1
11.2
11.3
11.4
11.5
Waveforms and scope plots ...................................................................................................... 23
Start up at low and high AC line input voltage and maximum load................................................. 23
Soft start at low AC line input voltage and maximum load ............................................................. 23
Frequency jittering........................................................................................................................ 24
Drain voltage and current @ maximum load ................................................................................. 24
Load transient response (Dynamic load from 10% to 100%) ......................................................... 25
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
11.6
11.7
11.8
11.9
11.10
11.11
11.12
Output ripple voltage at maximum load......................................................................................... 25
Output ripple voltage during burst mode at 1 W load..................................................................... 26
Active burst mode operation ......................................................................................................... 26
Vcc overvoltage protection ........................................................................................................... 27
Over load protection (built-in + extended blanking time) ................................................................ 27
VCC under voltage/Short optocoupler protection ............................................................................ 28
Auto restart enable ....................................................................................................................... 28
12
References ................................................................................................................................. 29
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Abstract
1
Abstract
This document is an engineering report of a universal input 12V 30W off-line flyback converter power supply
utilizing F3R CoolSET™ ICE3RBR0665JZ. The application evaluation board is operated in Discontinuous
Conduction Mode (DCM) and is running at 65 kHz switching frequency. It has a one output voltage with
secondary side control regulation. It is especially suitable for small power supply such as DVD player, set-top
box, game console, charger and auxiliary power of high power system, etc. The ICE3RBR0665JZ is the latest
version of the CoolSET™. Besides having the basic features of the F3R CoolSET™ such as Active Burst Mode,
propagation delay compensation, soft gate drive, auto restart protection for serious fault (Vcc over voltage
protection, Vcc under voltage protection, over temperature, over-load, open loop and short opto-coupler), it also
has the BiCMOS technology design, built-in soft start time, built-in and extendable blanking time, frequency jitter
feature with built-in jitter period and external auto-restart enable, etc. The particular features needs to be
stressed are the best in class low standby power and the good EMI performance.
2
Evaluation board
Figure 1 – EVAL-3RBR0665JZ [Dimensions L x W x H: 105mm x 52mm x 27mm (4.13" x 2.04" x 1.06")]
This document contains the list of features, the power supply specification, schematic, bill of material and the
transformer construction documentation. Typical operating characteristics such as performance curve and
scope waveforms are showed at the rear of the report.
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Evaluation board specification
3
Evaluation board specification
Input voltage
Input frequency
Output voltage
Output current
Output power
Maximum input power(Peak Power) for full input
range
85VAC~265VAC
50~60Hz
12V
2.5A
30W
Maximum output ripple voltage @ full load
No-load power consumption
< 30mV
< 50mW (comply with EU CoC Version 5, Tier 1)
Active mode four point average
(25%,50%,75% & 100%load)
Active mode at 10% load efficiency
< ±2% of average maximum input power
>86% (comply with EU CoC Version 5, Tier 1)
efficiency
>84% (comply with EU CoC Version 5, Tier 1)
105mm x 52mm x 27mm (4.13" x 2.04" x 1.06")
Form factor case size (L x W x H)
4
List of feature (ICE3RBR0665JZ)
650V avalanche rugged CoolMOS™ with built-in Startup Cell
Active Burst Mode for lowest Standby Power
Fast load jump response in Active Burst Mode
65 kHz internally fixed switching frequency
Auto Restart Protection Mode for Overload, Open Loop, Vcc Undervoltage, Overtemperature & Vcc
Overvoltage
Built-in Soft Start
Built-in blanking window with extendable blanking time for short duration high current
External auto-restart enable pin
Max Duty Cycle 75%
Overall tolerance of Current Limiting < ±5%
Internal PWM Leading Edge Blanking
BiCMOS technology provides wide VCC range
Built-in Frequency jitter feature and soft driving for low EMI
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Circuit description
5
Circuit description
5.1
Introduction
The EVAL-3RBR0665JZ evaluation board is a low cost off line flyback switch mode power supply ( SMPS )
using the ICE3RBR0665JZ integrated power IC from the CoolSET™-F3R family. The circuit, shown in Figure 2,
details a 12V, 30W power supply that operates from an AC line input voltage range of 85Vac to 265Vac,
suitable for applications in open frame supply or enclosed adapter.
5.2
Line input
The AC line input side comprises the input fuse F1 as over-current protection. The choke L11, X-capacitor
C11,C14 and Y-capacitor C12 act as EMI suppressors. Optional surge absorber device SA1, SA2 and varistor
VAR can absorb high voltage stress during lightning surge test. A rectified DC voltage (120V ~ 374V) is
obtained through the bridge rectifier BR1 and the input bulk capacitor C13.
5.3
Start up
Since there is a built-in startup cell in the ICE3RBR0665JZ, there is no need for external start up resistors. The
startup cell is connecting the drain pin of the IC. Once the voltage is built up at the Drain pin of the
ICE3RBR0665JZ, the startup cell will charge up the Vcc capacitor C16 and C17. When the Vcc voltage exceeds
the UVLO at 18V, the IC starts up. Then the Vcc voltage is bootstrapped by the auxiliary winding to sustain the
operation.
5.4
Operation mode
During operation, the Vcc pin is supplied via a separate transformer winding with associated rectification D12
and buffering C16, C17. Resistor R12 is used for current limiting. In order not to exceed the maximum voltage at
Vcc pin, an external zener diode ZD11 and resistor R13 can be added.
5.5
Soft start
The Soft-Start is a built-in function and is set at 20ms.
5.6
DZD clamper circuit
While turns off the CoolMOS™, the clamper circuit DZD11 absorbs the current caused by transformer leakage
inductance once the voltage exceeds DZD11 clamp voltage. Finally drain-source voltage of CoolMOS™ is lower
than maximum break down voltage of CoolMOS™.
5.7
Peak current control of primary current
The CoolMOS™ drain source current is sensed via external shunt resistors R14 and R14A which determine the
tolerance of the current limit control. Since ICE3RBR0665JZ is a current mode controller, it would have a cycleby-cycle primary current and feedback voltage control and can make sure the maximum power of the converter
is controlled in every switching cycle. Besides, the patented propagation delay compensation is implemented to
ensure the maximum input power can be controlled in an even tighter manner throughout the wide range input
voltage. The evaluation board shows approximately +/-0.53% (refer to Figure 11).
5.8
Output stage
On the secondary side the power is coupled out by a schottky diode D21. The capacitor C22, C23 provide
energy buffering following with the LC filter L21 and C24 to reduce the output voltage ripple considerably.
Storage capacitor C22, C23 is selected to have an internal resistance as small as possible (ESR) to minimize
the output voltage ripple.
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Circuit description
5.9
Feedback and regulation
The output voltage is controlled using a TL431 (IC21). This device incorporates the voltage reference as well as
the error amplifier and a driver stage. Compensation network C25, C26, R24, R25, R25A and R26 constitutes
the external circuitry of the error amplifier of IC21. This circuitry allows the feedback to be precisely matched to
dynamically varying load conditions and provides stable control. The maximum current through the optocoupler
diode and the voltage reference is set by using resistors R22 and R23. Optocoupler IC12 is used for floating
transmission of the control signal to the “Feedback” input via capacitor C18 of the ICE3RBR0665JZ control
device. The optocoupler used meets DIN VDE 884 requirements for a wider creepage distance.
5.10
Blanking window for load jump
In case of Load Jumps the Controller provides a Blanking Window before activating the Over Load Protection
and entering the Auto Restart Mode. The blanking time is built-in at 20ms. If a longer blanking time is required, a
capacitor, C19 can be added to BA pin to extend it. The extended time can be achieved by an internal 13µA
constant current at BA pin to charge C19 ( CBK =100nF) from 0.9V to 4.0V. Thus the overall blanking time is the
addition of 20ms and the extended time. The voltage at Feedback pin can rise above 4.0V without switching off
due to over load protection within this blanking time frame. During the operation the transferred power is limited
to the maximum peak current defined by the value of the current sense resistor, R14 and R14A.
Tblanking  Basic  Extended  20ms 
5.11
(4.0  0.9)*CBK
 20ms  238461.5 * CBK  23.8ms
IBK
Active burst mode
At light load condition, the SMPS enters into Active Burst Mode. At this start, the controller is always active and
thus the VCC must always be kept above the switch off threshold VCCoff ≥ 10.5V. During active burst mode, the
efficiency increases significantly and at the same time it supports low ripple on V OUT and fast response on load
jump. When the voltage level at FB falls below 1.35V, the internal blanking timer starts to count. When it
reaches the built-in 20ms blanking time, it will enter Active Burst Mode. The Blanking Window is generated to
avoid sudden entering of Burst Mode due to load jump.
During Active Burst Mode the current sense voltage limit is reduced from 1.03V to 0.34V so as to reduce the
conduction losses and audible noise. All the internal circuits are switched off except the reference and bias
voltages to reduce the total VCC current consumption to below 450µA. At burst mode, the FB voltage is changing
like a saw tooth between 3 and 3.5V. To leave Burst Mode, FB voltage must exceed 4V. It will reset the Active
Burst Mode and turn the SMPS into Normal Operating Mode. Maximum current can then be provided to stabilize
VOUT.
5.12
Jitter mode
The ICE3RBR0665JZ has frequency jittering feature to reduce the EMI noise. The jitter frequency is internally
set at 65 kHz (+/- 2.6 kHz) and the jitter period is set at 4ms.
5.13
Protection modes
Protection is one of the major factors to determine whether the system is safe and robust. Therefore sufficient
protection is necessary. ICE3RBR0665JZ provides all the necessary protections to ensure the system is
operating safely. The protections include Vcc overvoltage, overtemperature, overload, open loop, Vcc
undervoltage, short optocoupler, etc. When those faults are found, the system will go into auto restart which
means the system will stop for a short period of time and restart again. If the fault persists, the system will stop
again. It is then until the fault is removed, the system resumes to normal operation. A list of protections and the
failure conditions are showed in the below table.
Application Note AN-EVAL-3RBR0665JZ
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V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Circuit description
Protection function
Failure condition
Protection Mode
Vcc Overvoltage
1. Vcc > 20.5V & FB > 4.0V & during soft start period
2. Vcc > 25.5V
Auto Restart
Overtemperature
(controller junction)
TJ > 130°C
Auto Restart
VFB>4V & last for 20ms & VBA>4V & last for 30µs
Overload / Open loop
(Blanking time counted from charging VBA from 0.9V to
4.0V )
Auto Restart
Vcc Undervoltage / Short
Optocoupler
Vcc < 10.5V
Auto Restart
Auto-restart enable
VBA < 0.33V
Auto Restart
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Circuit diagram
6
Circuit diagram
Figure 2 – 30W 12V ICE3RBR0665JZ power supply schematic
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
PCB layout
N.B. : In order to get the optimized performance of the CoolSET™, the grounding of the PCB layout must be
connected very carefully. From the circuit diagram above, it indicates that the grounding for the CoolSET™can
be split into several groups; signal ground, Vcc ground, Current sense resistor ground and EMI return ground.
All the split grounds should be connected to the bulk capacitor ground separately.
Signal ground includes all small signal grounds connecting to the CoolSET™GND pin such as filter capacitor
ground, C17, C18, C19 and opto-coupler ground.
Vcc ground includes the Vcc capacitor ground, C16 and the auxiliary winding ground, pin 2 of the power
transformer.
Current Sense resistor ground includes current sense resistor R14 and R14A.
EMI return ground includes Y capacitor, C12.
7
PCB layout
7.1
Top side
Figure 3 – Top side component legend
7.2
Bottom side
Figure 4 – Bottom side copper and component legend
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Component list
Component list
8
No. Designator
Component Description
Footprint
Part Number
Manufacturer
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
Connector
600V/2A
220nF/305V
47pF/1kV
2.2nF/250V,Y1
82uF/450V
100nF/305V
22uF/50V
100nF/50V
1nF/50V
1200uF/16V
200V/0.2A
100V/30A
145V/200W
300V/1.6A
HS TO220
ICE3RBR0665JZ
SFH617 A3(Optocoupler)
TL431
Jumper
39mH/0.7A
691102710002
D2SB60A
B32922C3224
DEA1X3A470JC1B
DE1E3KX222MA4BN01F
450BXW82MEFC16X35
B329221C3104
50PX22MEFC5X11
WURTH ELECTRONICS
SHINDENGEN
EPCOS
MURATA
MURATA
RUBYCON
EPCOS
RUBYCON
MURATA
MURATA
RUBYCON
10R
0R
1R1/0.75W
1R/0.75W
820R
1.2k
330k
75k
1k
20k
Con2
Bridge(2S)
MKT8/18/15
MKT2/7/5
MKT2/13/10
RB16X36Horizontal
MKT5/18/15
RB5.5
0603
0603
RB10
DIODE0.3
ITO-220AB
DIODE0.4
MKT4.3/8.4/5
HS TO220
DIP7
DIP4
TO92-TL431AXIAL0.3
EMI_C_U21
Axial 0.4_V_FB
0603
0603
1206R
1206R
0603
0603
0603
AXIAL0.3
0603
0603
368µH(48:8:12)
250V/0.25W
EF25/10H
MKT3.5/7.5/5
750342158
B72207S0251K101
+12V Com,L N
BR1
C11
C110
C12
C13
C14
C16
C17,C19,C25
C18,C26
C22,C23 & C24
D12
D21
DZD11
F1
HS1
IC11
IC12
IC21
J1,J2,J3,J4
L11
L21
R12
R12A
R14
R14A
R22
R23
R24
R25
R25A
R26
33 TR1
34 VAR
Application Note AN-EVAL-3RBR0665JZ
14
GRM188R71H104KA93D
GRM188R71H102KA01D
16ZLK1200M10X20
1N485B
STPS30M100SFP
ST02D-140
36911600000
574502B03300G
ICE3RBR0665JZ
SFH617 A3
B82732R2701B030
2743002111
Quantity
SHINDENGEN
INFINEON
EPCOS
ERJB2BF1R1V
ERJB2BF1R0V
WURTH ELECTRONICS
MIDCOM
EPCOS
2
1
1
1
1
1
1
1
3
2
3
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
V1.0, 2014-07-22
30W 12V SMPS evaluation board with ICE3RBR0665JZ
Transformer construction
9
Transformer construction
Core and material: EE25/13/7(EF25), TP4A (TDG)
Bobbin: 070-2607(10-Pin, THT, Horizontal version)
Primary Inductance, Lp=368μH (±10%), measured between pin 4 and pin 5
Manufacturer and part number: Wurth Electronics Midcom (750342158, Rev01)
Transformer specifications:
Figure 5 – Transformer structure
Application Note AN-EVAL-3RBR0665JZ
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
10
Test results
10.1
Efficiency
VOut_ripple_p
Vin(Vac)
85
115
230
265
Pin(W)
Vo(Vdc)
Io(A)
k_pk
0.0035
3.4400
8.6500
17.4400
25.4900
35.8500
0.0363
3.4800
8.6300
17.2400
25.9700
34.9200
0.0439
3.5400
8.8500
17.3200
25.8700
34.4500
0.0480
3.5800
9.0300
17.4000
25.9400
34.4800
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
12.02
0.00
0.25
0.625
1.250
1.875
2.500
0.00
0.25
0.625
1.250
1.875
2.500
0.00
0.25
0.625
1.250
1.875
2.500
0.00
0.25
0.625
1.250
1.875
2.500
(mV)
35.20
47.00
9.50
13.00
18.40
26.60
35.70
48.00
10.00
12.70
18.30
23.80
38.80
51.50
9.80
12.90
18.30
24.20
39.90
53.40
9.70
13.10
18.60
26.50
Po(W)
η
(%)
3.01
7.51
15.03
22.54
30.05
87.35
86.85
86.15
88.42
83.82
3.01
7.51
15.03
22.54
30.05
86.35
87.05
87.15
86.78
86.05
3.01
7.51
15.03
22.54
30.05
84.89
84.89
86.75
87.12
87.23
3.01
7.51
15.03
22.54
30.05
83.94
83.19
86.35
86.88
87.15
Average η
(%)
OLP Pin
(W)
OLP Iout
(A)
47.10
3.27
46.85
3.33
46.80
3.41
47.30
3.45
86.31
86.76
86.50
85.90
Figure 6 – Efficiency Vs. AC line input voltage
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
Figure 7 – Efficiency Vs. output power @ 115Vac and 230Vac
10.2
Input standby power
Figure 8 – Input standby power @ no load Vs. AC line input voltage ( measured by Yokogawa WT210 power
meter - integration mode )
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
10.3
Line regulation
Figure 9 – Line regulation Vout @ full load vs. AC line input voltage
10.4
Load regulation
Figure 10 – Load regulation Vout vs. output power
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Test results
10.5
Maximum input power
Figure 11 – Maximum input power ( before overload protection ) vs. AC line input voltage
10.6
Electrostatic discharge/ESD test (EN6100-4-2)
Pass [level 4, 8kV (contact discharge)]
10.7
Surge/Lightning strike test (EN61000-4-5)
Pass [Installation class 3, 2kV (line to earth) & 1kV (line to line)]
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
10.8
Conducted emissions (EN55022 class-B)
The conducted emissions was measured by Schaffner (SMR4503) and followed the test standard of EN55022
(CISPR 22) class B. The evaluation board was set up at maximum load (30W) with input voltage of 115Vac and
230Vac.
Figure 12 – Maximum load (30W) with 115 Vac (Line)
Figure 13 – Maximum load (30W) with 115 Vac (Neutral)
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
Figure 14 – Maximum load (30W) with 230 Vac (Line)
Figure 15 – Maximum load (30W) with 230 Vac (Neutral)
Pass conducted emissions EN55022 (CISPR 22) class B with > 10dB margin.
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Test results
10.9
Thermal measurement
The thermal test of open frame evaluation board was done using an infrared thermography camera (TVS500EX) at ambient temperature 25⁰C. The measurements were taken after two hours running at full load (30W).
No. Major component
85Vac (°C) 115Vac (°C) 230Vac (°C) 265Vac (°C)
1
IC11 (ICE3RBR0665JZ)
57.6
52.6
65.6
66.7
2
DZD11
56.9
54.5
58.7
58.4
3
BR1
58.8
49.1
39.4
37.9
4
TR1
54.5
55.0
59.0
59.4
5
D21
65.2
65.2
65.1
65.1
6
L11
94.2
68.8
41.2
39.1
85Vac, 30W load, 25⁰C ambient
115Vac, 30W load, 25⁰C ambient
230Vac, 30W load, 25⁰C ambient
265Vac, 30W load, 25⁰C ambient
Figure 16 – Infrared Thermography of open frame evaluation board
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11
Waveforms and scope plots
All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope
11.1
Start up at low and high AC line input voltage and maximum load
487ms
487ms
Channel 1; C1 : Drain voltage (VDrain)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Start up time = 487ms
Figure 17 – Startup @ 85Vac & max. load
11.2
Channel 1; C1 : Drain voltage (VDrain)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Start up time = 487ms
Figure 18 – Startup @ 265Vac & max. load
Soft start at low AC line input voltage and maximum load
19ms
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Soft start time = 19ms
Figure 19 – Startup @ 85Vac & max. load
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.3
Frequency jittering
67kHz
67kHz
3.9ms
3.9ms
62kHz
62kHz
Channel 1; C1 : Drain voltage (VD)
Channel F2 : Frequency track of C1
Frequency jittering from 62 kHz ~ 67kHz, Jitter
period is 3.9ms
Figure 20 – Frequency jittering @ 85Vac and max.
load
11.4
Channel 1; C1 : Drain voltage (VD)
Channel F2 : Frequency track of C1
Frequency jittering from 62 kHz ~ 67kHz, Jitter
period is 3.9ms
Figure 21 – Frequency jittering @ 265Vac and
max. load
Drain voltage & Vcs @ maximum load
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Current sense voltage (VCS)
VDS_peak=302V
Figure 22 – Operation @ Vin = 85Vac and max.
load
Application Note AN-EVAL-3RBR0665JZ
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Current sense voltage (VCS)
VDS_peak=572V
Figure 23 – Operation @ Vin = 265Vac and max.
load
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Waveforms and scope plots
11.5
Load transient response (Dynamic load from 10% to 100%)
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk=116mV (Load change from10% to
100%,100Hz,0.4A/μS slew rate)
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk=118mV (Load change from10% to
100%,100Hz,0.4A/μS slew rate)
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 24 – Load transient response @ 85Vac
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 25 – Load transient response @ 265Vac
11.6
Output ripple voltage at maximum load
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk=26.6mV
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk=26.5mV
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 26 – AC output ripple @ Vin=85Vac and
max. load
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 27 – AC output ripple @ Vin=265Vac and
max. load
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.7
Output ripple voltage during burst mode at 1 W load
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk=41mV
Channel 1; C1 : Output ripple Voltage ( Vo )
Channel 2; C2 : Output Current ( Io )
Vripple_pk_pk = 49mV
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 28 – AC output ripple @ 85Vac and 1W
load
Probe terminal end with decoupling capacitor of
0.1uF(ceramic) & 1uF(Electrolytic), 20MHz filter
Figure 29 – AC output ripple @ 265Vac and 1W
load
11.8
Active burst mode operation
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VFB<1.35V & last for 20ms
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VFB>4V
(load change form full load to 1W load)
Figure 30 – Entering active burst mode @ 85Vac
(load change form 1W load to full load)
Figure 31 – Leaving active burst mode @ 85Vac
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.9
Vcc overvoltage protection
VCC OVP2
VCC OVP1
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VCC>25.5 & last for 150µs
VCC>20.5 & VFB>4V & during soft start &
last for 30µs
(J4 disconnected during system operating at no
load)
Figure 32 – Vcc overvoltage protection @ 85Vac
11.10
Over load protection (built-in + extended blanking time)
Extended
20ms built in
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VFB>4V & last for 20ms & VBA>4V & last
for 30µs
(output load change from 2.5A to 3.5A)
Figure 33 – Over load protection with
built-in+extended blanking time @ 85Vac
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
Waveforms and scope plots
11.11
VCC under voltage/Short optocoupler protection
VCC under voltage
underunderOVP2
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VCC<10.5V
(short the transistor of optocoupler during system
operating @ full load and release)
Figure 34 – Vcc under voltage/short optocoupler
protection @ 85Vac
11.12
Auto restart enable
Enter auto restart
Exit auto restart
Channel 1; C1 : Drain voltage ( VD )
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
Condition: VBAC<0.33V
(short BA pin to Gnd by 10Ω resistor & open)
Figure 35 – External protection enable @ 85Vac
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30W 12V SMPS evaluation board with ICE3RBR0665JZ
References
12
References
[1]
Infineon Technologies, Datasheet “CoolSET™-F3R ICE3RBR0665JZ Off-Line SMPS Current Mode
Controller with Integrated 650V CoolMOS™ and Startup cell ( frequency jitter Mode ) in Dip-7”
[2]
Kyaw Zin Min, Kok Siu Kam Eric, Infineon Technologies, Application Note “CoolSET™-F3R (DIP-8, DIP-7
& DSO-16/12) new Jitter version Design Guide”
[3]
Harald Zoellinger, Rainer Kling, Infineon Technologies, Application Note “AN-SMPS-ICE2xXXX-1,
CoolSET™. ICE2xXXXX for Off-Line Switching Mode Power supply (SMPS )”
Application Note AN-EVAL-3RBR0665JZ
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Published by Infineon Technologies AG