SI9104

Si9104 Vishay Siliconix High-Voltage Switchmode Regulator FEATURES 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) 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. FUNCTIONAL BLOCK DIAGRAM FaxBack 408-970-5600, request 70002 www.siliconix.com S-60752—Rev. E, 05-Apr-99 1 Si9104 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Voltages Referenced to -VIN (VCC < +VIN + 0.3 V) VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V +VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 V VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V ID (Peak) (300 µs pulse, 2% duty cycle). . . . . . . . . . . . . . . . . . . . . 2 A ID (rms) . . . . . . . . ....