LD7591

3

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7591-DS-00 March 2010

Pin Configuration

YY:

Year code (D:2004, E:2005…)

WW:

Week code

PP:

Production code

1

8

2

3

4

7

6

5

TOP MARK

YYWWPP

SOP-8 & DIP-8 (TOP VIEW)

Ordering Information

Part number

Package

Top Mark

Shipping

LD7591 GS

SOP-8

Green package

LD7591GS

2500 /tape & reel

LD7591 GN

DIP-8

Green package

LD7591GN

3600 /tube /Carton

Pin Descriptions

Pin

NAME

FUNCTION

1

INV

Output voltage feed back control

2

COMP

Output of the error amplifier for voltage loop compensation to achieve stable

3

RAMP

Ramp generator, connecting a resistor to GND pin to set the saw tooth signal

4

CS

Current sense pin, connect to sense the MOSFET current for OCP

5

ZCD

Detecting zero crossing of input signal

6

GND

Ground

7

OUT

Gate drive output to drive the external MOSFET

8

VCC

Power source VCC pin

Recommended Operating Conditions

Item

Min.

Max.

Unit

Vcc pin capacitor

22

47

μF

Comp pin capacitor

0.1

4.7

μF

RAMP pin resistor

4.7k

100k

Ω