Capacitance-used Soft Start Circuit

Published:2011/5/7 3:54:00 Author:Joyce | Keyword: Capacitance-used, Soft Start | From:SeekIC

The following graph is the capacitance-used soft start circuit.At the sudden moment when C2 is supplied with power, VTwill be offset by R2, R3 and become power on, resulting in short circuit of R1, which equalsthat the adjustment end of LM317 is connected to the ground. The power output is 1.25 V, and with the charge of C2 going on, the output voltage will rise gradually.According to the component parameters in the graph, it takes 3s for it to reach the rated output voltage.The function of VD is to discharge the electricity of C2 after the power supply is cut off,so as to guarantee the proper soft start next time.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/Capacitance_used_Soft_Start_Circuit.html

Print this Page | Comments | Reading(3)