Closed-loop control circuit of switching converter of frequency control

摘要

(57) Abstract (Modified) Topic As for switching power supply of frequency control, oscillating circuitWhen it is like the CMOS555 die timer, the circuitBecause the flow of being full and discharging is bidirectional, feedback is difficultYou applied. SolutionsBidirectional flow in bridge diode D₁Depending, rectifying, try to change into the unidirectional flow. maIt is, replacing to D₁, the phototransistor of the photo couplerWay, phototransistor in Ptr₁ and each other it becomes converse direction,Making line up, to be able to give bidirectional propertyIt is.