FSCQ-SERIES
FSCQ1565RP Typical Application Circuit
Application
Output Power
Input Voltage
Output Voltage (Max Current)
8.5V (1A)
Universal input
(90-270Vac)
15V (1A)
C-TV
198W
140V (0.9A)
24V (2A)
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
T1
D205
EER4942
EGP20D
15V, 1A
10
RT101
6D-22
1
3
C204
1000uF
35V
C210
470pF
1kV
11
C102
470uF
400V
D204
EGP20D
BEAD101
R102
150kΩ
0.25W
8.5V, 1A
4
13
12
R101
100kΩ
0.25W
C205
1000uF
35V
C107
1nF
1kV
BD101
C209
470pF
1kV
R106 C104
1kΩ 10uF
1W 50V
D105
1N4937
1
Drain
D202
EGP30J
SYNC
3
Vcc
5
IC101
FSCQ1565RP
140V, 0.9A
ZD102
18V
1W
6
R104
1.5kΩ
0.25W
R103
5.1Ω
0.25W
D106
1N4148
14
15
D103
1N4937
L202
BEAD
C202
100uF
160V
GND FB
C201
220uF
160V
C207
470pF
1kV
2
4
16
C105
2.7nF
50V
C103
10uF
50V
R105
470Ω
0.25W
C106
47nF
50V
D203
EGP30D
24V, 2A
17
18
7
C203
2200uF
35V
C208
470pF
1kV
LF101
VR201
30kΩ
R201
1kΩ
0.25W
OPTO101
FOD817A
ZD201
5.1V
0.5W
R208
1kΩ
R202
1kΩ
0.25W
R203
39kΩ
0.25W
C101
330nF
275VAC
C206
22nF
50V
R205
240kΩ D201
0.25W 1N4148
SW201
R207
5.1kΩ
FUSE
250V
5.0A
0.25W
0.25W
C301
3.3nF
Q202
KSC945
Q201
KA431
LZ
R204
4.7kΩ
0.25W
R206
10kΩ
0.25W
38
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
