FSCQ0565RT Fairchild Semiconductor, FSCQ0565RT Datasheet - Page 24

• Manufacturer Part Number: FSCQ0565RT
• Description: A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared to conventional hard-switched converter with a fixed switching frequency
• Manufacturer: Fairchild Semiconductor

FSCQ-Series Rev. 1.1.2
FSCQ0765RT Typical Application Circuit
Features
1. Schematic
High Efficiency (>83% at 90 Vac 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)
BD101
Application
275VAC
LF101
330nF
C101
C-TV
RT101
5D-9
100k
0.25W
R101
220 F
UF4007
C102
400V
D104
FUSE
250V
2.0A
ZD101
18V
1W
150k
0.25W
R102
3
C103
10 F
50V
Output Power
Vcc
2
FSCQ0765RT
GND
Drai n
IC101
1
83W
4
FB
SYNC
C106
47nF
50V
BEAD101
5
1.5k
R106
1W
1N4148
0.25W
D103
C104
10 F
R105
470
50V
0.25W
1.5k
R104
1N4937
3.9nF
C105
D102
50V
1N4937
D101
Input Voltage
Universal input
(90–270 Vac)
24
0.25W
R103
5.1
OPTO101
FOD817A
Key Design Notes
1
C107
2.2nF
3
4
7
1nF
1kV
6
C301
ZD201
EER3540
24V output is designed to drop to around 8V in
standby mode
T1
13
17
10
11
12
18
14
15
16
KA431
Q201
0.25W
R201
1k
EGP20D
EGP20D
EGP20J
EGP20D
D204
D203
470pF
470pF
470pF
D202
470pF
D205
C210
C209
C208
C207
1kV
1kV
1kV
1kV
0.25W
R202
1k
C206
22nF
50V
Output Voltage (Max Current)
220k
0.25W
R205
0.25W
1000 F
1000 F
R203
39k
1000 F
100 F
C205
C203
C201
160V
C204
35V
35V
35V
0.25W
4.7k
R204
BEAD
L201
125V (0.4A)
18V (0.5A)
24V (0.5A)
VR201
D201
30k
12V (1A)
KSC945
Q202
C202
47 F
160V
0.25W
R208
ZD202
1k
0.5W
5.1V
0.25W
0.25W
5.1k
5.1k
R206
R207
www.fairchildsemi.com
SW201
18V, 0.3A
12V, 0.5A
125V, 0.3A
24V, 0.4A
Standby
Normal