SWITCHING_REGULATOR_OPERATING_AT_200_kHz

Published:2009/6/28 21:12:00 Author:May | From:SeekIC

This circuit provides a regulated dc with less than 100 mV of ripple for microprocessor applications. Necessary operating voltages are taken from the bleeder resistor network connected across the unregulated 28 V supply. The output of the LM710 comparator (actually an oscillator running at 200 kHz) is fed through a level-shifting circuit to the base ofbipolar transistor Q2. This transistor is part of a bootstrap circuit necessary to turn the power MOSFET full on in totem-pole MOSFET arrays.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/SWITCHING_REGULATOR_OPERATING_AT_200_kHz.html

Print this Page | Comments | Reading(3)