LD7750E View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

LD7750E

High Voltage Green-Mode PWM Controller with Over Temperature Protection

Unspecified 

LD7750E

02/29/2012

High Voltage Green-Mode PWM Controller with

Over Temperature Protection

Rev. 00

General Description

The LD7750E integrates several functions of protections,

and EMI-improved solution in a SOP-7, SOP-8 or DIP-8

package to minimize the component counts and the circuit

space.

The device provides functions of low startup current,

green-mode power-saving operation, leading-edge

blanking of the current sensing and internal slope

compensation. Also, the LD7750E features more

protections like OLP (Over Load Protection), OVP (Over

Voltage Protection), and OTP (Over Temperature

Protection) to prevent the circuit being damaged under the

abnormal conditions. The LD7750E features built-in

auto-recovery function for OVP on Vcc pin and OLP.

Features

z High-Voltage (500V) Startup Circuit

z Current Mode Control

z Green Mode Control

z UVLO (Under Voltage Lockout)

z LEB (Leading-Edge Blanking) on CS Pin

z Internal Frequency Swapping

z Internal Slope Compensation

z Internal Over Current Protection

z OVP (Over Voltage Protection) on Vcc

z OLP (Over Load Protection)

z External OTP through a NTC

z 500mA Driving Capability

Applications

z Switching AC/DC Adaptor and Battery Charger

z Open Frame Switching Power Supply

z LCD Monitor/TV Power

Typical Application

AC

input

EMI

Filter

*

HV VCC OUT

*

LD7750E

OTP

CS

GND COMP

photocoupler

Leadtrend Technology Corporation

LD7750E-DS-00 February 2012

1

www.leadtrend.com.tw

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