US3702

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

9 of 9

www.unisonic.com.tw

QW-R119-022.c



TYPICAL APPLICATION CIRCUIT

F1

LINE

NEUT

8

9

10

1

2

3

4

L2

5V/2.4A

GND

1

4

7

IC1

6

7

4

3

1

2

L1

1

2

3

4

T1

IC3

IC2

BD1

t

°

ZNR1

1

2

3

4

TR1

SGND

DRAIN

DRAIN

FB

8

3

XC1

R1

R2

C1

R4

R3

D1

C2

YC1

R5

C8

C4

D2

C5

C10

C7

D3

C3

R6

C9

R12

R7

R8

R9

6

DRAIN

PGND

2

C11

Fig.10 UTC US3702 Typical Application Circuit

Table1. Components reference description for UTC US3702 application circuit

DESIGNATOR

PART TYPE

DESIGNATOR

PART TYPE

DESIGNATOR

PART TYPE

C1

33μF

R1

2.2MΩ

D1

FR107

C2

202pF

R2

2.2MΩ

D2

SB540

C3

22μF

R3

100KΩ

D3

RS1D

C4

470μF

R4

1MΩ

IC1

US3702

C5

470μF

R5

15Ω

IC2

PC-817

C6

0.1μF

R6

820Ω

IC3

TL431

C7

102pF

R7

1KΩ

YC1

222

C8

0.001μF

R8

22KΩ

T1

EE25

C9

0.1μF

R9

22KΩ

L1

UU10.5

C10

220μF

R10

15~25MΩ

L2

2μH

C11

1μF (Optional)

R11

68KΩ

F1

2A/250V

R12

2KΩ

ZNR1

7D471K

TR1

SCK102R55A

XC1

334/275V

BD1

KBP205

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exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

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presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.