5V 2A PC standby power supply circuit composed of TNY255P

Published:2011/5/16 4:59:00 Author:Rebekka | Keyword: PC standby power supply | From:SeekIC

A 5V, 2A PC standby power supply circuit composed of TNY255P for PC is shown as above. Its input voltage Ui uses PC main power supply. The snubber circuit is composed of Rl, C2 and VDl. It can limit the spike voltage produced by TNY255P drain off mode in the safe range. The switching frequency of TNY255P is 130kHz. It is 3 times of TNY253P. So EE16 core can meet the standard of the 10W power output. The secondary voltage passes the VD2, C4, L and C5 rectifier filter and gains +5 V regulator output.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/5V_2A_PC_standby_power_supply_circuit_composed_of_TNY255P.html

Print this Page | Comments | Reading(3)