SG6846LDZ Datasheet PDF - Fairchild

●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