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