General Description

The LD7592 is a voltage mode PFC controller operating on

transition mode, with several integrated functions of

protection, such as OVP, OCP, and Brown-in protection. It

reduces the components counts and is available in a

SOP-8 or DIP-8 package. Those make it an ideal design

for low cost applications.

It provides functions of low startup current, over voltage

protection, open feedback protection, disable function,

over current protection, under voltage lockout and

integrated LEB of current sensing. The LD7592 adopts

transition mode for power factor correction and realizes

high efficiency and a low switching noise by zero current

switching.

特性 Features

? Transition Mode of PFC Pre-Regulator

? Voltage Mode Control

? Programmable Max. On-Time

? ZCD Auxiliary Winding is Unnecessary

? Low Startup Current (<1?A)

? UVLO (Under Voltage Lockout)

? LEB (Leading-Edge Blanking) on CS pin

? VCC OVP (Over Voltage Protection) on VCC pin

? VO OVP (Over Voltage Protection) on INV pin

? Bulk Cap OVP (Over Voltage Protection) on OVP pin

? OCP (Cycle by Cycle Current Limit)

? 900/-1200mA Driving Capability

? Internal OTP (Over Temperature Protection)

Applications

? Adaptor of Output above 75W.

? LCD TV Power Supply