Fairchild FL6961, FL6300A service manual
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Application
Fairchild Device
Input Voltage
Range
Rated Output
Power
Output Voltage
(Rated Current)
LED Illumination
FL6961, FL6300A
90VAC - 277VAC
70W
24V (2.9A)
Fairchild Reference Design
The following Reference Design supports the demonstration kit for the FL6961
and FL6300A. It should be used in conjunction with the FL6961 and FL6300A
datasheet as well as Fairchild’s application notes and technical support team.
Please visit Fairchild’s website at www.fairchildsemi.com
Key Features of FL6961
Boundary Mode PFC Controller
Low Input Current THD
Controlled On-time PWM
Zero Current Detection
Cycle-by-cycle Current Limiting
Leading-edge blanking instead of RC filtering
Low Start-up Current: 10uA (typical)
Low Operating Current: 4.5mA (typical)
Feedback Open-Loop Protection
Programmable Maximum On-Time (MOT)
Output Over-Voltage Clamping Protection
Clamped Gate Output Voltage 16.5V
© 2011 Fairchild Semiconductor Corporation 1 RD-L008_FL6961 + FL6300A • Rev.1.0.1
Key Features of FL6300A
Internal high-voltage start-up
Quasi-resonant operation
Cycle-by-cycle current limiting
Peak current mode control
Leading-edge blanking
Internal minimum t
OFF
Internal 2ms soft-start
Over-power compensation
Gate output maximum voltage
Auto-recovery short-circuit protection (FB pin)
Auto-recovery open-loop protection (FB pin)
VDD pin & output voltage(DET pin) latch OVP
www.fairchildsemi.com
R131
433/3216
D205
LL4148
C210
105/2012
L201
10uH
C206
33uF/50V
Q201
MMBT2222A
ZD201
15B
C207
104/2012
R205
392/2012
C202
1000uF/35V
R202
152/2012
R118
100/3216
C203
1000uF/35V
R122
0R2 2W
Q102
FQPF8N80
C112
200/2012
R119
4R7/3216
D105
LL4148
R120
151/3216
R130
103/3216
C110
47uF/450V
R124
203/3216
R123
224/3216
R117
150K/2W
D108
RS1M
C117
200/2012
R111
0R2 2W
C204
1000uF/35V
C205
1000uF/35V
R105
433/3216
R106
433/3216
R107
433/3216
R213
153/3216
R129
103/3216
C103
472(Y)
C104
472(Y)
U201
KA431S
2
3
1
R214
153/3216
R101
473/3216
T2
EER3124 (V10P)
4
3
1
5
6
910
7
R102
473/3216
R103
473/3216
R207
473/2012C101 684/275V
C106
33uF/50V
C201
1000uF/35V
C107
104/2012
D103
EGP30J
F101
220V/2A
D101
KBL06
D203
LL4148
C211
222(Y)
R128
473/3216
U102
FL6300
VDD
6
DET
1
FB
2
CS
3
HV
8
GATE
5
GND
4
NC
7
L101
EI2820 (V10P)
610
15
D104
RS1M
R212
392/2012
R210
183/2012
R211
133/2012
R204
753/2012
R208
302/2012
N L
C102 334/275V
C111
222 1kV
R116
150K/2W
R203
513/2012
R112
394/3216
R104
473/3216
R113
394/3216
R114
394/3216
U202 LM2904
IN2(-)
6
IN(+)
3
GND4IN2(+)
5
IN(-)
2
OUT1
1
Vcc
8
OUT2
7
R115
682/3216
U101
FL6961
COMP
2
INV
1
MOT
3
CS
4
Vcc
8
OUT
7
GND
6
ZCD
5
C105
224/275V
U203
FOD817
12
34
D204
LL4148
24V/3A
GND
C208
474/2012
R209
473/2012
D201
FFPF20U P30DN
FG
LF101
45mH
1 3
2 4
C209
474/2012
D106
RS1M
R201
0.1/5W
C108
105/2102
D202
FFPF20U P30DN
C116
104/2012
ZD103
24B 1W
LF102
45mH
1 3
2 4
D107
RS1M
R125
430/3216
R126
430/3216
R206
133/2012
R108
203/3216
R127
203/3216
C113
104/2012
t
RT1
5D-9
C114
33uF/50V
RV1 10D471
t
RT2
5D-9
C212
102/3216
C109
105/2102
Q101
FCPF16N 60
R216
163/2012
C213
102/3216
R109
100/3216
R110
4R7/3216
D102
LL4148
1. Schematics
© 2011 Fairchild Semiconductor Corporation 2 RD-L008_FL6961 + FL6300A • Rev.1.0.1
Figure 1. Schematic
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Primary
2
1/2Np
2
Naux
2
3
1
5
6
Secondary
0.45φ * 1
20T
6
0.40φ * 1
6T
0.65φ * 2
8T
4
1/2Np
0.45φ * 1
20T
Tape 3T
4
5
Ns1
Naux
1/2Np
9
3mm
3mm
3
1
7
910
10
7
1/2Np
Ns1
Ns1
No
Winding
Pin(SF)
Wire
Turns
Winding Method
1
1/2Np
3 → 2
0.12φ×25
20 Ts
Solenoid winding
Insulation : Polyester Tape t = 0.025mm, 3Layers
2
Ns1
6 → 9
0.1φ×60
8 Ts
Solenoid winding Insulation : Polyester Tape t = 0.025mm, 1Layers
3
Ns2
7 → 10
0.1φ×60
8 Ts
Solenoid winding
Insulation : Polyester Tape t = 0.025mm, 3Layers
4
1/2Np
2→ 1
0.12φ×25
20 Ts
Solenoid winding Insulation : Polyester Tape t = 0.025mm, 2Layers
6
Naux
5 → 4
0.1φ×12
6 Ts
Solenoid winding Insulation : Polyester Tape t = 0.025mm, 3Layers
Pin
Spec.
Remark
Inductance
1– 3
500 uH ±7%
1kHz, 1V
Leakage
1– 3
14 uH Max
Short all output pins
2. Transformer and Inductor specification
Transformer
Core : EER3124
Bobbin : 10pin
Figure 2. Transformer specifications & construction. [EER3124]
Table 1. Winding specifications.
© 2011 Fairchild Semiconductor Corporation 3 RD-L008_FL6961 + FL6300A • Rev.1.0.1
Table 2. Electrical Characteristics.
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