特性 Features

High-Voltage (500V) Startup Circuit

Current Mode Control

Green Mode Control

UVLO (Under Voltage Lockout)

LEB (Leading-Edge Blanking) on CS Pin

Internal Frequency Swapping

Internal Slope Compensation

Internal Over Current Protection

OVP (Over Voltage Protection) on Vcc

OLP (Over Load Protection)

External OTP through a NTC

500mA Driving Capability

Applications

Switching AC/DC Adaptor and Battery Charger

Open Frame Switching Power Supply

LCD Monitor/TV Power

General Description

The LD7750R 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 LD7750R 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 LD7750R features built-in

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