U3848 Datasheet, PDF (9/12 Pages) Unisonic Technologies – HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

UC3848
„ TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT

BD1
AC IN
TH1
F1
CX1
D3
D1
L3
R12
TR1
C8
CD1 ^RD1
+
+ C5
C9
IC3
R6
Q1
D2
4
5
3 _UTC 6
2 UC3848 7
R
C15
1
8
R11 _C3
C14
+ C4
R17
R5
R2
IC1
RF
C2
IC2
R4
R3
+
5V 3A
GND
CY1
FIG.12 UC3848 Typical Application Circuit






Table1 Components Reference description for UC3848 application circuit
C12 CC 10nF/1000V
D3 _Diode
UF1007
C14 CC
100nF/50V
IC1 IC
PC817
C2 CC
33nF/50V
IC2 IC
TL431CLP
CX1
104/275V
IC3 IC
UC3848
C5 EC 1000uF/15V
L3
L
1.2uH
C4 CC
22uF/50V
Q1 MOS
4N60
C8 EC
68uF/400V
C9 EC 1000uF/16V
R17 R
1.2Ω/1W
1/8W
CD1 CC
1nF/1KV
R2
R
680Ω
1/8W
CY1 CC
4.7nF/250V
R3
R
ADJ
1/8W
D1 Diode
C63-004
R4
R
5.6KΩ
1/8W
D2 Diode
1N4148
R5
R
5.6KΩ
1/8W
NoteğC5 and C9 are lower ESR capacitors.


RR
TH1
BD1 R
RD1 R
R12 R
TR1
RF R
C15 CC
470KΩ
SCK-103
KBP-208
10Ω
3.3kΩ
optional
4.7kΩ
0.1µF/50V
1/8W
1/8W
1/8W
1/8W
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R103-033,C