发明授权
US08912777B2 Control circuit and control method for switching power supply, and switching power supply and electronic apparatus using control circuit and control method
有权
用于开关电源的控制电路和控制方法，以及使用控制电路和控制方法的开关电源和电子设备
- 专利标题： Control circuit and control method for switching power supply, and switching power supply and electronic apparatus using control circuit and control method
- 专利标题（中）： 用于开关电源的控制电路和控制方法，以及使用控制电路和控制方法的开关电源和电子设备
-
申请号： US13586289申请日： 2012-08-15
-
公开(公告)号： US08912777B2公开(公告)日： 2014-12-16
- 发明人: Tsutomu Ishino
- 申请人： Tsutomu Ishino
- 申请人地址： JP
- 专利权人： Rohm Co., Ltd.
- 当前专利权人： Rohm Co., Ltd.
- 当前专利权人地址： JP
- 代理机构： Cantor Colburn LLP
- 优先权： JP2011-179149 20110818
- 主分类号： G05F1/00
- IPC分类号： G05F1/00 ; H02M3/156 ; H02M1/00
摘要：
The present invention improves the efficiency of a switching power supply in a light load. A control circuit is configured to repeat a driving duration enabling the switching element to be switched and a stop duration stopping the switching in a light load state. A pulse signal generating portion generates a driving pulse signal, in which the driving pulse signal at least includes a pulse in the driving duration, and the lighter a load is, the less the number of pulses in the driving duration is. A first driver drives a first switching transistor according to the at least one pulse in the driving pulse signal other than predetermined K pulses (K is a natural number). The K pulses are in the driving pulse signal when the number of the pulses is reduced to K.
公开/授权文献
信息查询
IPC分类:
