UC3848

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

9 of 11

www.unisonic.com.tw

QW-R103-033.F

TYPICAL APPLICATION CIRCUIT

F1

LINE

NEUT

8

9

10

1

2

3

4

L2

12V/1.25A

GND

5

3

2

6

IC1

6

7

4

3

1

2

L1

1

2

34

T1

IC3

IC2

BD1

t

°

ZNR1

1

2

3

4

15W

TR1

SS

GND

OUT

FB

CS

4

1

7

XC1

R1

R2

C1

R5

R3

R4

D1

C2

YC1

R6

C8

C4

D2

C5

R11

LD1

C10

R12

C6

C7

R13

D3

C3

R7

C9

R14

R8

R9

R10

1

2

3

4

L3

M1

FIG.12 UC3848 Typical Application Circuit

Table1 Components Reference description for UC3848 application circuit

DESIGNATOR

PART TYPE

DESIGNATOR

PART TYPE

DESIGNATOR

PART TYPE

C1

33μF

R1

2.2MΩ

D1

FR107

C2

0.001μF

R2

2.2MΩ

D2

SB5100

C3

22μF

R3

68KΩ

D3

RS1D

C4

470μF

R4

100Ω

IC1

UC3848

C5

470μF

R5

1MΩ

IC2

PC-817

C6

0.1μF

R6

15Ω

IC3

TL431

C7

0.01μF

R7

560Ω

YC1

222

C8

0.001μF

R8

1KΩ

T1

EE25

C9

0.1μF

R9

3.9KΩ

L1

UU10.5

C10

220μF

R10

15KΩ

L2

2μH

R11

10KΩ

L3

Ring Choke

R12

1.5MΩ~4MΩ

LD1

LED

R13

1.0Ω

F1

2A/250V

R14

1.8KΩ

ZNR1

7D471K

TR1

SCK102R55A

XC1

334/275V

BD1

KBP205