FSCQ FAIRCHILD [Fairchild Semiconductor], FSCQ Datasheet - Page 29

• Manufacturer Part Number: FSCQ
• Description: Green Mode Fairchild Power Switch (FPS)
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FSCQ1265RT Typical Application Circuit
Features
• High Efficiency (>83% at 90Vac Input)
• Wider Load Range through the Extended Quasi-Resonant Operation
• Low Standby Mode Power Consumption (<1W)
• Low Component Count
• Enhanced System Reliability Through Various Protection Functions
• Internal Soft-Start (20ms)
Key Design Notes
• 24V output is designed to drop to around 8V in standby mode
1. Schematic
BD101
Application
275VAC
LF101
330nF
C101
C-TV
100kΩ
0.25W
R101
RT101
5D-11
330uF
C102
400V
FUSE
250V
5.0A
ZD102
18V
1W
150kΩ
0.25W
R102
3
C103
10uF
50V
Vcc
Output Power
2
FSCQ1265RT
GND
Drain
IC101
1
132W
4
FB
SYNC
C106
47nF
50V
BEAD101
5
R106
1kΩ
1W
1N4148
0.25W
C104
D106
470Ω
10uF
R105
50V
0.25W
1.5kΩ
R104
1N4937
3.3nF
C105
D105
50V
1N4937
D103
Universal input
Input Voltage
(90-270Vac)
0.25W
R103
5.1Ω
C107
1nF
1kV
1
3
4
7
6
OPTO101
FOD817A
EER4042
3.3nF
C301
T1
13
17
10
11
12
18
14
15
16
KA431
Q201
LZ
EGP20D
EGP30D
EGP30J
EGP20D
0.25W
D204
D203
R201
470pF
470pF
470pF
D202
470pF
1kΩ
D205
C210
C209
C208
C207
1kV
1kV
1kV
1kV
0.25W
R202
1kΩ
Output Voltage (Max Current)
1000uF
1000uF
150nF
C206
1000uF
150uF
50V
C205
C203
C201
160V
C204
35V
35V
35V
BEAD
L202
0.25W
39kΩ
R203
140V (0.6A)
8.5V (0.5A)
15V (0.5A)
24V (1.5A)
240kΩ
C202
68uF
160V
0.25W
0.25W
R205
4.7kΩ
R204
VR201
30kΩ
1N4148
D201
KSC945
Q202
0.25W
R208
ZD201
1kΩ
0.5W
FSCQ-SERIES
5.1V
15V, 0.5A
140V, 0.6A
24V, 1.5A
8.5V, 0.5A
0.25W
0.25W
5.1kΩ
R206
10kΩ
R207
SW201
29