公开(公告)号：US06259615B1

公开(公告)日：2001-07-10

申请号：US09437081

申请日：1999-11-09

Applicant: Yung-Lin Lin

Inventor： Yung-Lin Lin

IPC: H02M3335

CPC classification number: H02M7/523 ,  H02M7/5387 ,  H02M2001/0048 ,  H02M2007/4815 ,  H05B41/2828 ,  H05B41/2855 ,  H05B41/3927 ,  Y02B20/185 ,  Y02B70/1441 ,  Y02B70/1491

Abstract: A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasitic capacitance in the resonant tank circuit. Additionally, the circuit is self-learning and is adapted to determine the optimum operating frequency for the circuit with a given load. An over-voltage protection circuit can also be provided to ensure that the circuit components are protected in the case of open-lamp condition.