Low Riple Power Supply

Published:2013/3/20 1:28:00 Author:Ecco | Keyword: Low Riple, Power Supply | From:SeekIC

This Low riple power supply circuit can be used in which a high current is needed with a low ripple voltage (for example in a high powered class AB amplifier when high quality reproduction is required). Q1, Q2, and R2 may be considered as a power darlington transistor. ZD1 and R1 give a reference voltage at the base of Q1. ZD1 should be selected thus: ZDl = Vow-1.2. C2 can be picked for the degree of smoothness as its value is effectively multiplied by the combined gains of Q1/Q2, if 100 µF is chosen for C2, assuming minimum hfe for Q l and Q2, C = 100 x 15(Q1) x 25(Q2) = 37,000 uF.



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

Print this Page | Comments | Reading(3)