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International Conference on Electronics, Information and Communication Engineering (EICE 2012)

Garry Lee
Garry Lee
Information Engineering Research Institute
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Boost converter can reduce the output current and output capacitance with the rated power, which is applied widely in switching power supply. It has the advantages of zero-current turn-off characteristic, small inductance and simple control circuit when it operates in discontinuous current mode (DCM), and it is suitable for the miniwatt active power factor correction (APFC) circuit. Mathematic models of Boost converter operating in DCM and critical mode (CRM) are built up, the influence of the different inductance value on the DCM is analyzed, and the characteristic formulas are deduced. The DCM pattern electric circuit characteristic is simulated by Pspice software, and the correctness of characteristic formula is validated.

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