Half bridge type converter power supply circuit

Published:2011/7/12 3:42:00 Author:TaoXi | Keyword: Half bridge type, converter, power supply | From:SeekIC

In the high voltage switch power supply, we usually use the half bridge type converter circuit if the output power is large. The circuit is as shown in the figure. It is composed of two capacitances and two high voltage transistors. When the two transistors are cut-off, if the capacities of the two capacitances are the same and the circuit is symmetrical, the voltage of the capacitance midpoint A is the half of the input voltage. When the VTl is conduction, the capacitance C01 discharges through the VTl and the primary winding N1 of the transformer; at the same time, the capacitance C02 charges through the input power supply, the VTl and the original edge winding N1 of T1. In the process of charging and discharging, the electric potential of midpoint A will reduce exponentially.



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