產品應用：

LD7575- Green-Mode PWM Controller with High-Voltage Start-Up Circuit

General Description

The LD7575 is a current-mode PWM controller with excellent power-saving operation. It features a high- voltage current source to directly supply the startup current from bulk capacitor and further to provide a lossless startup circuit. 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.

Furthermore, the embedded over voltage protection, over load protection and the special green-mode control provide the solution for users to design a high performance power circuit easily. The LD7575 is offered in both SOP-8 and DIP-8 package

Features

• High-Voltage (500V) Startup Circuit

• Current Mode Control

• Non-Audible-Noise Green Mode Control

• UVLO (Under Voltage Lockout)

• LEB (Leading-Edge Blanking) on CS Pin

• Programmable Switching Frequency

• Internal Slope Compensation

• OVP (Over Voltage Protection) on Vcc

• OLP (Over Load Protection)

• 500mA Driving Capability

Applications

• Switching AC/DC Adaptor and Battery Charger
  
• Open Frame Switching Power Supply
  
• LCD Monitor/TV Power

Typical Application