[Leadtrend Technology Corporation]

General Description

The LD7552 is a low cost, low startup current, current mode PWM controller with green-mode power-saving operation. 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.

Features

High-Voltage CMOS Process with Excellent ESD Protection

Very Low Startup Current (Typical 5µA)

Under Voltage Lockout (UVLO)

Current Mode Control with Cycle-by-Cycle Peak Current Limiting

Leading-Edge Blanking on CS Pin

Programmable Switching Frequency

Internal Slope Compensation

Proprietary Green-Mode Control for Power Saving

Non-audible-noise Green Mode Control

500mA Driving Capability