| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor power amplifier, capable of always uniformizing the partial voltage charge of elements, even when the elements and gate drivers have variation in characteristics without reducing power conversion efficiency. SOLUTION: Delay time generating circuits T1 to Tn delay gate signal which are applied to IGBT1 to IGBTn(insulated gate bipolar transistor) and a delay time controller CNT detects allotted voltages v1 to vn, when the respective elements turn off and increases the delay times of next gate signals of the delay time generating circuits for elements other than the element having the lowest voltage on the basis of the element, thereby automatically correcting the unbalance among the voltages allotted. |
