Isolation Regulated Power Supply Circuit of NE555

Published:2011/7/16 21:55:00 Author:Michel | Keyword: Regulated Power Supply Circuit | From:SeekIC

The picture is isolation regulated power supply circuit of NE555.In the circuit,R1 and R2 adjust and drive the conduction and off time of VT1.When R1 = R2,feet 3 of NE555 outputs rectangular wave with 50% dutyfactor but actually VT1 conduction is a little late, thus it needs to be adjusted lightly.VT1 conduction time is determined by R2 and C1 and the deadline depends on C1 and R1.When output voltage is high PWL,the charging time is t1 and the dischrging time is t2 when it is low PWL and t1=0.693R2C1(s)，t2=0.693R1C1(s).



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/Isolation__Regulated_Power_Supply_Circuit_of_NE555.html

Print this Page | Comments | Reading(3)