The absolutely available switch power supply: Sanyo 80P power supply

Published:2011/6/10 3:47:00 Author:Seven | Keyword: power supply, Sanyo | From:SeekIC

Oscillating process:The 300v voltage is imposed on the B pole of switch Q504 by R518 and R519, and Q504 starts to conduct. The 9- and 10-pin of T501 are positive feedback coil, the voltage polarity of 9-pin is positive, while 10-pin is negative. Due to the positive feedback which consists of the B and E pole, R516, R515 and D509, Q504 is saturated quickly.After Q504 is saturated, the current in the primary coil of T501 rises up linearly, the current generates a sawtooth-wave step-down voltage on R514, the voltage is delivered to the B pole of Q502 by R505 and C507, and the sawtooth wave voltage is added on the 6.8V DC voltage of Q502B.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/The_absolutely_available_switch_power_supply__Sanyo_80P_power_supply.html

Print this Page | Comments | Reading(3)