| 摘要 |
PURPOSE:To reduce a through current and to reduce a switching loss by inserting a switching element between the base and the emitter of a PNP transistor TR and turning on the switching element when the PNP TR is turned off. CONSTITUTION:When the high level is given to a terminal in, an NPN TR 15 is turned on, and then, a PNP TR 1 is turned on. Since the gate of an NMQS 13 is in the low level and it is turned off in this case, the high level is outputted to a terminal OUT. When the low level is given to the terminal in and the high level is given to a terminal Soff, the NMQS 13 is turned on and the NPN TR 15 is turned off, and therefore, the PNP TR 1 is turned off. Since a turning- off signal is given to an NPN TR 14, a PNP TR 2 is turned on. Thus, the turning-on time of the PNP TR 1 is shortened to reduce the through current. |
