LD7575 datasheet(1/17 Pages) LEADTREND

Part #	LD7575

Description	Green-Mode PWM Controller with High-Voltage Start-Up Circuit

PDF	17 Pages

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Manufacturer	LEADTREND [Leadtrend Technology]

Direct Link	https://www.leadtrend.com.tw/

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LD7575

6/16/2008

1

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD7575-DS-04b November 2009

Green-Mode PWM Controller with High-Voltage

Start-Up Circuit

REV: 04b

General Description

The LD7575 is a current-mode PWM controller with

excellent power-saving operation.

It features a high-

voltage current source to directly supply the startup

current from bulk capacitor and further to provide a

lossless startup circuit. The integrated functions such as

the leading-edge blanking of the current sensing, internal

slope compensation, and the small package provide the

users a high efficiency, minimum external component

counts, and low cost solution for AC/DC power

applications.

Furthermore, the embedded over voltage protection, over

load protection and the special green-mode control

provide the solution for users to design a high

performance power circuit easily. The LD7575 is offered

in both SOP-8 and DIP-8 package.

Features

High-Voltage (500V) Startup Circuit

Current Mode Control

Non-Audible-Noise Green Mode Control

UVLO (Under Voltage Lockout)

LEB (Leading-Edge Blanking) on CS Pin

Programmable Switching Frequency

Internal Slope Compensation

OVP (Over Voltage Protection) on Vcc

OLP (Over Load Protection)

500mA Driving Capability

Applications

Switching AC/DC Adapter and Battery Charger

Open Frame Switching Power Supply

LCD Monitor/TV Power

Typical Application

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