SG6741SZ

高度集成绿色模式PWM控制器 Highly-Integrated Green-Mode PWM Controller

Description

The highly integrated SG6741 PWM controller provides several features to enhance the performance of flyback

converters.

The highly integrated SG6741 series of PWM controllers provides several features to enhance the performance of flyback converters.

Features

ƒ  High-Voltage Startup

ƒ  Low Operating Current: 4mA

ƒ  Linearly Decreasing PWM Frequency to 22kHz

ƒ  Frequency Hopping to Reduce EMI Emission

ƒ  Peak-Current-Mode Control

ƒ  Cycle-by-Cycle Current Limiting

ƒ  Leading-Edge Blanking

ƒ  Synchronized Slope Compensation

ƒ  Gate Output Maximum Voltage Clamp: 18V

ƒ  VDDOver-Voltage Protection Auto Restart

ƒ  VDDUnder-Voltage Lockout UVLO

ƒ  Internal Open-Loop Protection

ƒ  Constant Power Limit Full AC Input Range

Applications

General-purpose switch-mode power supplies and flyback power converters, including:

ƒ  Power Adapters

ƒ  Open-Frame SMPS