LD7523

2

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7523-DS-00

June 2009

Pin Configuration

SOP-8 & DIP-8(TOP VIEW)

1

8

2

3

4

7

6

5

TOP MAR K

YYWWPP

YY

: Year code (D: 2004, E: 2005… ..)

WW : Week code

##

: Production code

Ordering Information

Part number

Package

TOP MARK

Shipping

LD7523 GS

SOP-8

Green Package

LD7523GS

2500 /tape & reel

LD7523 GN

DIP-8

Green Package

LD7523GN

3600/tube /carton

The LD7523 is ROHS Complaint/ Green Package.

Pin Descriptions

PIN

NAME

FUNCTION

1

BNO

Brownout Protection Pin. Connect a resistor divider between this pin and bulk

capacitor voltage to set the brownout level and line compensation. When the

voltage of this pin fall below threshold voltage, the PWM output will be shut off.

2

COMP

Voltage feedback pin (same as the COMP pin in UC384X). Connect it with a

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

3

NC

NC

4

CS

Current sense pin, connect to sense the MOSFET current

5

GND

Ground

6

OUT

Gate drive output to drive the external MOSFET

7

VCC

Supply voltage pin

8

OVP

This pin is active-high to provide the OVP function.

Connecting a zener or a

resistor voltage divider to Vcc will set the OVP level.

Once the voltage rise

above 2.5V, the OVP will be tripped and the gate drive off.

Short this pin to

ground to disable the OVP function.