Power Conversion Circuit Of Switching Regulator Power

Published:2011/8/23 23:40:00 Author:Robert | Keyword: Power, Conversion, Switching, Regulator | From:SeekIC

The power conversion circuit of switching regulator power has many types such as push-pull, full-bridge, half-bridge and single-ended flyback and single-ended forward and other types. The picture shows the push-pull type power conversion circuit. The control circuit would control the base electrode of the transistors VT1 and VT2. The VT1 and VT2 would be alternately connected and disconnected with PWM excitation method. Then they would convert the input DC voltage to the high-frequency square-wave AC voltage. When the VT1 is conducted, the input power voltage Ui would be through VT1 and then it is added the high-frequency transformer T1's primary winding N1. Because T1 has two main windings N1 with equal number of turns, so when the VT1 is conducted, it adds twice power voltage 2UI onto the transistor VT2 which is in disconnected mode.



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