300kHz 600W ZVT--PWM boost converter

Published:2011/7/12 20:55:00 Author:TaoXi | Keyword: 300kHz, 600W, ZVT--PWM, boost converter | From:SeekIC

The power stage circuit is as shown in the figure, you can design the switching voltage stabilization power supply with the 300kHz switching frequency, 600W output power and 300V output voltage by using the ZVT--PWM boost converter. The input voltage is 150～200V. The Ls is the saturable reactor, it can be used to eliminate the ringing between the Lr and the VT1 output capacitance, it uses the Toshiba spike killer SAl0×6×4.5 magnetic core, the circle number is five. You can use the rapid recovery diode VD2 to stop the conduction of the VTl ontology diode. If there is no diode, the VTl will conduct the current to supply power to the resonance between the Lr and the VTl output capacitance. So when the VT1 is closing, it will bear the reverse recovery problem.



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