Microsemi

Linfinity Microelectronics Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 8

Copyright

© 2000

Rev. 1.1b,2005-03-09

LX1681/1682

Voltage-Mode PWM Controllers

TM

®

TY PI CAL APPLI CATI O N

LX1681

0.1µF

Q

1

D

2

L

1

C

2

R

1

R

2

R

SET

R

SE NS E

C

1

C

3

V

FB

C

SS

N.C.

GND

TDRV

V

C1

CS

V

C2

V

BO O ST

12V

V

IN

5V

V

OUT

SS

LX1682

0.1µF

Q

1

D

2

L

1

C

2

R

1

R

2

R

SET

C

1

V

FB

C

SS

BDRV

GND

TDRV

V

C1

CS

V

C2

V

IN

5V

V

OUT

SS

Q

2

C

4