Application circuit example of transistor switch stabilized voltage supply

Published:2011/4/23 4:16:00 Author:May | Keyword: transistor switch, stabilized voltage supply | From:SeekIC

The application of transistor switch stabilized voltage supply is rather widespread. The diagram is a specific circuit example. In the diagram, transformer T, diode VD1~VD4 and capacitor C5 make up rectifying and wave-filtering circuit; sampling circuit is series by resistor R7, R8 and potentiometer R9;transistor Vr4 is error amplifier; switch adjuster is complex consisting of transistor Vr2, Vr3; Vt1 is pulse width adjuster; self oscillation circuit consists ofVT1, VT2, VT3 and R3, C3; reference voltage source consists of resistor R6 and constant voltage diode; VD5 is fly-wheel diode; L is energy storage induction; output filter consists of VD5, L and C12; the loop composed of R5 and C10 can make fly-wheel diode having better restitution property. Bridge rectifier outputs DC voltage after breaking over AC network source switch S. Its positive end is connected with emitter of VT2 tube. Its negative end offers bias to Vr2 by resistor R2. It can make complex switch adjuster saturation and breaking over. Output current can generate induced voltage which the left is positive and the right is negative when it is passing energy storage induction L.



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

Print this Page | Comments | Reading(3)