HV9120P PDF – SMPS Controller

HV9120P is a Switch-Mode Power Supply (SMPS) controller manufactured by Supertex, which is now part of Microchip Technology.

Part Number: HV9120, HV9120P-G

Function: High-Voltage, Current-Mode, PWM Controller

Package: DIP, SOP 16 Pin Type

Manufacturer: Supertex, Microchip Technology


HV9120P datasheet pdf


HV9120 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 240V AC 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).

A unique input circuit allows the HV9120P to self-start directly from a high voltage input, and subsequently take the power to operate from one of the outputs of the converter it is controlling, allowing very efficient operation while maintaining input-to-output galvanic isolation limited in voltage only by the insulation system of the associated magnetic assembly. A ±2% internal bandgap reference, internal operational amplifier, very high speed comparator, and output buffer allow production of rugged, high performance, high efficiency power supplies of 50W or more, which can still be over 80% efficient at outputs of 1.0W or less.


1. 10 to 450V input voltage range

2. <1.3mA supply current >1.0MHz clock

3. >20:1 dynamic range @ 500KHz

4. 49% Maximum duty cycle version

5. Low internal noise


HV9120P-G pinout controller


• 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

HV9120P Datasheet PDF