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Q0170R View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
View to exact match
Q0170R
Fairchild
Fairchild Semiconductor Fairchild
Q0170R Datasheet PDF : 17 Pages
First Prev 11 12 13 14 15 16 17
Typical Application Circuit
Application
PC Auxiliary Power Supply
(Using FSQ0270RNA)
Output power
15W
Input Voltage
Universal input
(85-265 VAC)
Output Voltage (Max. Current)
5V (3A)
Features
„ High efficiency (> 78% at 115 VAC and 230 VAC input)
„ Low standby mode power consumption (< 0.8W at 230 VAC input and 0.5W load)
„ Enhanced system reliability through various protection functions
„ Internal soft-start (10ms)
„ Line UVLO function can be achieved using external component
Key Design Notes
„ The delay time for overload protection is designed to be about 30ms with C8 of 47nF. If faster/slower triggering of
OLP is required, C8 can be changed to a smaller/larger value (e.g. 100nF for about 60ms).
„ ZP1, DL1, RL1, RL2, RL3, RL4, RL5, RL7, QL1, QL2, and CL9 build a Line Under-Voltage Lockout block (UVLO).
The Zener voltage of ZP1 determines the input voltage that makes FPS turn on. RL5 and DL1 provide a reference
voltage from VCC. If the input voltage divided by RL1, RL2, and RL4 is lower than the Zener voltage of DL1, QL1 and
QL2 turn on and pull down VFB to ground.
„ An evaluation board and corresponding test report can be provided.
1. Schematic
C1
2.2nF
AC250V
RS1 CS1
9 1.5nF
L1
330μH
CON1
1
R6
2.4 1W
2
3
Input
D2
D3
1N4007 1N4007
R2
4.7k
C2
22μF
400V
D4
D5
1N4007 1N4007
R8
open
C3
22μF
400V
C10
1nF
250V
ZP1
1N4762
ZDS1
P6KE180A
R14
30
DS1
1N4007
T1
EE2229
1
6,7
D1
SB540
3 9, 10
C4
1000μF
16V
R3
R4
560 100
C9
1000μF
16V
1
U1A
FOD817A
2
L2
1μH
J4
0
R5
1.25k
1%
CON2
1
2
Output
C5
470μF
10V
L3
0
J1
FB
RL1 1M
DL1
RL5
RL2
1N5233B 30k
1M
U3
FSQ0270RNA
8765
4
D6 R10
1N4007 2
5
3
C6
47nF
R9
10k
U2
1
TL431A
2
R11
1.2k
1%
QL1
KSP2907A
J3
open
RL4
120k
RL3
1k
J2
0
4
CL9
10μF
50V
RL7
3
40k
QL2
U1B
KSP2222A FOD817A
1234
ZD2 C8
open 47nF
R13
open
ZR1
C7
80
47μF
25V
R12
open
ZD1
1N4745
FSQ0x70RNA Rev. 1.12
Figure 21. Demo Circuit
© 2006 Fairchild Semiconductor Corporation
FSQ0170RNA, FSQ0270RNA, FSQ0370RNA Rev. 1.0.2
12
www.fairchildsemi.com
 

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