LD7552B

2

Leadtrend Technology Corporation

LD7552B-DS-01a January 2008

Pin Configuration

SOP-8 & DIP-8 (TOP VIEW)

YY: Year code (D: 2004, E: 2005…..)

WW: week code

PP: production code

1

8

2

3

4

7

6

5

TOP MARK

YYWWPP

Ordering Information

Part number

Package

TOP MARK

Shipping

LD7552B PS

SOP-8

PB Free

LD7552BPS

2500 /tape & reel

LD7552B GS

SOP-8

Green Package

LD7552BGS

2500 /tape & reel

LD7552B PN

DIP-8

PB Free

LD7552BPN

3600 /tube /carton

The LD7552B is ROHS Compliant/ Green Package.

Pin Descriptions

PIN

NAME

FUNCTION

1

GND

Ground

2

COMP

Voltage feedback pin (same as the COMP pin in UC384X), By connecting a

photo-coupler to close the control loop and achieve the regulation.

3

VCC

Supply voltage pin

4

RT

This pin is to program the switching frequency.

By connecting a resistor to ground

to set the switching frequency.

5

NC

Unconnected pin

6

CS

Current sense pin, connect to sense the MOSFET current

7

VCC

Supply voltage pin

8

OUT

Gate drive output to drive the external MOSFET