General Description

The Supertex HV9123 is a Switch Mode Power Supply (SMPS) controller subsystem that can start and run directly from almost any DC input, from a 12V battery to a rectified and filtered 240VAC line. It contains all the elements required to build a single-switch converter except for the switch, magnetic assembly, output rectifier(s) and filter(s).

Features

► 10 to450V input voltage range

► <1.3mA supply current

►>1.0MHz clock

►>20:1 dynamic range @ 500KHz

►99% Maximum duty cycle version

►Low internal noise

Applications

► Off-line high frequency power supplies

► Universal input power supplies

► High density power supplies

► Very high efficiency power supplies

► Extra wide load range power supplies