General Description

The LD7765 is a Green Mode PWM IC, featuring X-cap

discharge functions to reduce the discharge resistor loss

in less component counts.

The LD7765 provides HV start-up, green-mode

power-saving operation, internal slope compensation and

Soft-start functions which could minimize the power loss

and enhance the system performance.

With complete protection as OLP/ OVP/ OTP and

brown-in/out, this chip prevents the circuit from being

damaged in abnormal conditions

Features

 High-Voltage (500V) Startup Circuit on HV pin

 Brown-in/out Function on HV pin

 X-Cap Discharge function on HV pin

 Frequency Trembling for EMI improve

 Green Mode Control for Power Saving

 Current Mode control with Slope Compensation

 OVP (Over Voltage Protection) on Vcc

 OLP (Over Load Protection)

 OTP (Over temperature protection)

 Soft Start

 Soft Driving

 +500mA/-800mA Driving Capability

Applications

 Switching AC/DC Adaptor and Battery Charger

 Open Frame Switching Power Supply

 LCD Monitor/TV Power