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Fairchild Reference Design
This guide supports the reference design for the FL7730. It should be used in conjunction
with the FL7730 datasheet as well as Fairchild’s application notes and technical support
team. Please visit Fairchild’s website at www.fairchildsemi.com.
Application
Fairchild Device
Input Voltage Range
Output
Power
Output Voltage
(Rated Current)
LED Bulb
FL7730
90 ~ 140 VAC
16.8 W
24 V (0.7 A)
Key Features










Compatible with Traditional TRIAC Control
Cost-Effective Solution without Input Bulk Capacitor and Feedback Circuitry
Power Factor Correction (PFC)
Accurate Constant-Current (CC) Control
Linear Frequency Control for Better Efficiency and Easy Design
Constant Current Regulation vs. Output Voltage Change (11 ~ 26 V): < ± 5%
Constant Current Regulation vs. Line Voltage Change (90 ~ 140 VAC): < ± 5%
Output Open / Short-Circuit Protection with Auto Restart
System Efficiency up to 86%
PF and THD at Nominal Voltages (110 ~ 120 VAC): PF (> 0.98), THD (< 10%)
© 2013 Fairchild Semiconductor Corporation
1
RD-L021L_FL7730 • Rev. 1.0.0
www.fairchildsemi.com
1. Schematic
Figure 1.
© 2013 Fairchild Semiconductor Corporation
Schematic
2
RD-L021L_FL7730 • Rev. 1.0.0
www.fairchildsemi.com
2. Bill of Materials
Item
No.
Part
Reference
Part Number
Qty.
Description
1
Q1
DF06S
1
Bridge Diode
2
Q2
FQPF2N60C
1
2 A / 600 V Active Damper MOSFET
3
Q3
FL7730_F116
1
Main Controller
4
Q4
FDD5N60NZ
1
4 A / 600 V Main Switch
5
6
7
8
F1
L1, L2
D1
D2
Fuse
R10402KT00
FR107DITR-ND
12 V/ 0.5 W
1
2
1
1
1 A / 250 V Fuse
4 mH Filter Inductor
1 A / 1000 V Diode
12 V Zener Diode
9
D3
1N4003
1
1 A / 200 V General Purpose Rectifiers
10
D4
1N4007
1
1 A / 1000 V Diode
11
D5
SB5100
1
5 A / 100 V Fast Rectifier
1
2
1
1
1
1
1
1
1
1
22 nF / 275 VAC X Capacitor
330 nF / 450 V Film Capacitor
220 nF / 25 V SMD Capacitor 3216
2.2 µF / 25 V SMD Capacitor 3216
10 pF / 50 V SMD Capacitor 2012
2.2 µF / 50 V SMD Capacitor 2012
100 nF / 50 V SMD Capacitor 2012
47 µF / 50 V Electrolytic Capacitor
1 nF / 1 kV SMD Capacitor 3216
4.7 nF Y Capacitor
3
680 µF / 35 V Electrolytic Capacitor
Nichicon
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
100 nF / 35 V SMD Capacitor 3216
500 Ω / 2 W Metal Resistor
100 Ω / 2 W Metal Resistor
20 kΩ SMD Resistor 3216
1 MΩ SMD Resistor 3216
100 kΩ SMD Resistor 2012
82 kΩ SMD Resistor 2012
91 kΩ SMD Resistor 2012
12 kΩ SMD Resistor 2012
100 kΩ / 1W Metal Resistor
510 kΩ SMD Resistor 3216
100 Ω SMD Resistor 2012
5.1 Ω SMD Resistor 3216
0.5 Ω SMD Resistor 3216
300 Ω SMD Resistor 2012
51 kΩ SMD Resistor 3216
Yageo
Stackpole
Yageo
ELCODIS
Yageo
Vishay
Yageo
Yageo
Vishay
Yageo
Yageo
Rohm
Rohm
Stackpole
Panasonic
Vishay
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
C1
223K/275VACP
C2, C3
MTF 334J450V
C4
CC1206KRX7R8BB224
C5
1206F225Z250CT
C6
0805N100J500NT
C7
C2012Y5V1H225Z
C8
C0805X104K050T
C9
SK-47UF/50V
C10
C1206C102KDRAC
C11
DE2E3KH472M
C12, C13,
UHE1V681MPD
C14
C15
CC1206MRY5V9BB104
R1
RMCF1206JG1K10-ND
R2
MCP200JR-100R
R3
RMCF1206FG20K0
R4
RC1206JR-071ML
R5
CRCW080575K0JNEAHP
R6
RT0805WRB0762KL
R8
9C08052A9102JLHFT
R9
CRCW080512K0JNEA
R10
RSF100JB-100K
R11, R12
RT1206CRD07510KL
R13
MCR10EZPJ101
R14
MCR18EZHJ5R1
R15
RMCF1206JTR500
R16
ERJ-6GEYJ301V
R17
CRCW120651K0JNEA
© 2013 Fairchild Semiconductor Corporation
3
Manufacturer
Fairchild
Semiconductor
Fairchild
Semiconductor
Fairchild
Semiconductor
Fairchild
Semiconductor
SLEEK
Bosung
CP
RENESAS
Fairchild
Semiconductor
Fairchild
Semiconductor
Fairchild
Semiconductor
CARL
CARL
Yageo
WALSIN
Yageo
TDK Corporation
HEC
Su'scon
KEMET
Murata
RD-L021L_FL7730 • Rev. 1.0.0
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3. Transformer
RM8
8
12
Ns 12T
Np1 33T
7
1
5
Np2 27T
Naux 10T
2
6
Figure 2.
Pin Configuration
Tape 2T
Naux:6→5
Naux
Np2:1→2
Ns:7→8
Np
Ns
Np1:12→1
Np
Figure 3.
Table 1.
Tape 2T
Tape 2T
Tape 2T
Transformer Winding Structure
Winding Specifications
No
Winding
Pin (S  F)
Wire
Turns
Winding Method
1
Np1
12  1
0.25Ø
33 Ts
Solenoid Winding
2
Insulation: Polyester Tape t = 0.025 mm, 2-Layer
3
Ns
78
4
0.35Ø X2
12 Ts
Solenoid Winding
Insulation: Polyester Tape t = 0.025 mm, 2-Layer
5
Np
12
6
0.25Ø
27 Ts
Solenoid Winding
Insulation: Polyester Tape t = 0.025 mm, 2-Layer
7
Naux
65
0.2Ø
10 Ts
Solenoid Winding
8
Insulation: Polyester Tape t = 0.025 mm, 2-Layer
9
Copper-Foil (Shielding), Closed Loop
10
Insulation: Polyester Tape t = 0.025 mm, 2-Layer
Table 2.
Electrical Characteristics
Pin
Specification
Remark
Inductance
2 – 12
0.9 mH ±10%
50 kHz, 1 V
Leakage
2 – 12
< 10 µH
50 kHz, 1 V Short All Output Pins
© 2013 Fairchild Semiconductor Corporation
4
RD-L021L_FL7730 • Rev. 1.0.0
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4. Performance
VOUT
[V]
Output Current
Figure 4.
Table 3.
Constant Current Regulation – Measured by E-Load [CR Mode]
Constant Current Regulation by Output Voltage Change (11 ~ 26 V)
Input Voltage
Min Current
Max Current
Tolerance
90 VAC / 60 Hz
720 mA
745 mA
±1.7%
110 VAC / 60 Hz
742 mA
787 mA
±2.9%
120 VAC / 60 Hz
744 mA
795 mA
±3.3%
140 VAC / 60 Hz
755 mA
794 mA
±2.5%
Table 4.
Constant Current Regulation by Line Voltage Change (90 ~ 140 VAC)
Output
Voltage
90 VAC
110 VAC
120 VAC
140 VAC
Tolerance
20 V
720 mA
752 mA
774 mA
778 mA
±3.9%
22 V
726 mA
787 mA
744 mA
766 mA
±4.0%
24 V
730 mA
744 mA
795 mA
776 mA
±4.3%
© 2013 Fairchild Semiconductor Corporation
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RD-L021L_FL7730 • Rev. 1.0.0
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Efficiency
Input Voltage
Figure 5.
Table 5.
System Efficiency
System Efficiency
Input Voltage
Input
Power
Output
Current
Output
Voltage
Output
Power
Efficiency
90 VAC
21.73 W
735 mA
24.44 V
17.96 W
82.67%
110 VAC
22.14 W
763 mA
24.59 V
18.76 W
84.74%
120 VAC
23.05 W
794 mA
24.75 V
19.65 W
85.25%
140 VAC
22.43 W
783 mA
24.65 V
19.30 W
86.05%
PF
THD
Input Voltage
Figure 6.
© 2013 Fairchild Semiconductor Corporation
Power Factor & Total Harmonic Distortion (60 Hz)
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RD-L021L_FL7730 • Rev. 1.0.0
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Table 6.
Power Factor & Total Harmonic Distortion (60 Hz)
Input Voltage
PF
THD
90 VAC / 60 Hz
729 mA
23.91 V
0.994
9.62%
110 VAC / 60 Hz
752 mA
24.05 V
0.990
8.77%
120 VAC / 60 Hz
799 mA
24.25 V
0.987
8.58%
140 VAC / 60 Hz
777 mA
24.14 V
0.976
10.18%
Table 7.
Power Factor & Total Harmonic Distortion (50 Hz)
Input Voltage
Figure 7.
Output Current Output Voltage
PF
THD
90 VAC / 50 Hz
Output Current Output Voltage
726 mA
24.20 V
0.994
8.79%
110 VAC / 50 Hz
745 mA
24.28 V
0.991
8.28%
120 VAC / 50 Hz
787 mA
24.52 V
0.988
8.02%
140 VAC / 50 Hz
774 mA
24.43 V
0.977
9.66%
Dimming Curve (Effective RMS Input Voltage vs. Output Current) – Line Voltage [120 VAC]
Table 8.
Dimmer Compatibility
Manufacturer
Dimmer
Condition
Max. Current
Min. Current
Flicker
LEVITON
6633
120 V / 60 Hz
742 mA
2 mA (0.3%)
No
LUTRON
AY-600P
120 V / 60 Hz
604 mA
19 mA (3.1%)
No
LUTRON
S-600
120 V / 60 Hz
690 mA
11 mA (1.6%)
No
LUTRON
DV-600P
120 V / 60 Hz
614 mA
9 mA (1.4%)
No
LUTRON
TG-603PG
120 V / 60 Hz
466 mA
11 mA (2.4%)
No
LUTRON
S-600P
120 V / 60 Hz
629 mA
7 mA (1.1%)
No
LUTRON
CN-600PHW
120 V / 60 Hz
616 mA
20 mA (3.2%)
No
LUTRON
GL-600H
120 V / 60 Hz
729 mA
10 mA (1.4%)
No
© 2013 Fairchild Semiconductor Corporation
7
RD-L021L_FL7730 • Rev. 1.0.0
www.fairchildsemi.com
5. Related Resources
FL7730 — Dimmable Single-Stage PFC PSR Offline LED Driver
Reference Designs — http://www.fairchildsemi.com/referencedesign/
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© 2013 Fairchild Semiconductor Corporation
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RD-L021L_FL7730 • Rev. 1.0.0