Switched Voltage Regulator ICâ€s Part 1

The Si9102 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 Si9102 is available in both standard and lead (Pb)-free 14-pin plastic DIP and 20-pin PLCC packages which are specified to operate over the industrial temperature range of - 40 °C to 85 °C.

• 10 to 120 V Input Range
• Current-Mode Control
• On-chip 200 V, 7 ? MOSFET Switch
• SHUTDOWN and RESET
• High Efficiency Operation (> 80 %)
• Internal Start-Up Circuit
• Internal Oscillator (1 MHz)