Circuit structure and method capable of reducing oscillation of semiconductor circuit for power conversion
A technology for converting circuits and semiconductors, which is applied in the direction of output power conversion devices, DC power input conversion to DC power output, and conversion equipment without intermediate conversion to AC power.
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[0042] enter figure 2 Shown in A is a schematic diagram of the circuit structure of the voltage converter 100 of the present invention. Similar to the voltage converter 10 in the background art, the voltage converter 100 includes a high-side MOSFET 105, which is presented with a body diode 108 and a low-side MOSFET 100, which Accompanied by a body diode 112 present. The drain terminal of the low-side MOSFET 110 is connected to the source of the high-side MOSFET 105 at a central connection point 115 . The method for reducing the ringing oscillation is to prevent the loop reverse recovery energy of the body diode 112 from passing through the parasitic inductance such as Lser and the parasitic capacitance. This is achieved by reversing most of the reverse current back to the DC input supply, which is connected to the drain terminal of the high side Mosfet 105 and the source terminal of the low side Mosfet 110 . To achieve this purpose, the fast-start diode 120 represented by ...
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