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SI9104
High-Voltage Switchmode Regulator
Si9104 Vishay Siliconix
High-V oltage Switchmode Regulator
FEATURES
DESCRIPTIONThe 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-to-
dc 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.
FUNCTIONAL BLOCK DIAGRAM 10- to 120-V Input Range Current-Mode Control On-Chip 200-V, 5-Ω MOSFET Switch SHUTDOWN and RESET High Efficiency Operation (>80%) Internal Start-Up Circuit Internal Oscillator (1 MHz)
