FEATURES

• 10- to 120-V Input Range

• Current-Mode Control

• On-Chip 200-V, 5-W MOSFET Switch

• SHUTDOWN and RESET

• High Efficiency Operation (>80)

• Internal Start-Up Circuit

• Internal Oscillator (1 MHz)

DESCRIPTION

The Si9104 high-voltage switchmode regulator is a monolithic

BiC/DMOS integrated circuit which contains most of the

components necessary to implement a high-efficiency dc-todc

converter up to 3 watts. It can either be operated from a

low-voltage dc supply, or directly from a 10- to 120-V

unregulated dc power source.

This device may be used with an appropriate transformer to

implement most single-ended isolated power converter

topologies (i.e., flyback and forward).

The Si9104 is available in a 16-pin wide-body SOIC and is

specified over the D suffix (-40 to 85°C) temperature range.