LD7576JPS Просмотр технического описания (PDF) - Unspecified

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Компоненты Описание

производитель

LD7576JPS

Green-Mode PWM Controller

Unspecified 

Pin Descriptions

LD7576/76H/76J/76K

PIN

NAME

FUNCTION

This pin is to program the frequency of the low frequency timer. By connecting a

capacitor to ground to set the OLP delay time.

1

CT

And this pin can be used for latch mode protection. By pulling this pin lower than 0.8

V, the controller will be entered latch mode until the AC power-on recycling.

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

2

COMP photo-coupler to close the control loop and achieve the regulation. A high quality

ceramic capacitor (X7R) is required for general applications (102pF at least).

3

CS

Current sense pin, connect to sense the MOSFET current

4

GND Ground

5

OUT Gate drive output to drive the external MOSFET

6

VCC Supply voltage pin

7

NC Unconnected Pin

Connect this pin to positive terminal of bulk capacitor to provide the startup current

8

HV

for the controller. When Vcc voltage trips the UVLO(on), this HV loop will be off to

save the power loss on the startup circuit.

Leadtrend Technology Corporation

LD7576-DS-03 December 2007

3

www.leadtrend.com.tw

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