SG6846LDZ

IC CTLR PWM HI INTEGRATED 8-DIP

Description

The highly integrated SG6846 series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby-power consumption,a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency under light-load conditions. Under zero-load conditions, the power supply enters burst-mode. This completely shuts off PWM output.

Features

  Low Startup Current: 8µA

  Low Operating Current: 3.7mA

  Peak-Current Mode of Operation with Cycle-by Cycle Current Limiting

  PWM Frequency Continuously Decreasing with Burst Mode at Light Loads

  VDDOver-Voltage Protection OVP

  AC Input Brownout Protection with Hysteresis

  Constant Output-Power Limit Full AC Input Range

  Internal Latch Circuit for OVP, OTP, and OCP

  Two-level Over-Current Protection OCP with 96ms Delay Time

  Very Few External Components

  Programmable Over-Temperature Protection OTP

Applications

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

Power Adapters

Open-Frame SMPS

SMPS with Surge-Current Output, such as for Printers, Scanners, Motor Drivers