公开(公告)号：US08823335B2

公开(公告)日：2014-09-02

申请号：US13269703

申请日：2011-10-10

申请人： Takeki Sugahara ,  Masao Ueno

发明人： Takeki Sugahara ,  Masao Ueno

IPC分类号： G05F5/00

CPC分类号： H02M1/4208 ,  Y02B70/126 ,  Y02P80/112

摘要： A switching power supply is provided to supply an AC input voltage. The supply includes a control circuit configured to detect a voltage of the AC power source in a voltage waveform, and switch elements in a synchronous rectification switching mode in synchronization with polarities of the voltage waveform when the AC input voltage is equal to or greater than a predetermined voltage value. The control unit also operates the switching without synchronization with the polarities when the AC input voltage is smaller than the predetermined voltage value.

摘要翻译： 提供开关电源以提供AC输入电压。 该电源包括：控制电路，被配置为当AC输入电压等于或大于一个时，与电压波形的极性同步地检测电压波形中的交流电源的电压和同步整流切换模式的开关元件 预定电压值。 当交流输入电压小于预定电压值时，控制单元也可以在不与极性同步的情况下操作开关。

公开(公告)号：US08766604B2

公开(公告)日：2014-07-01

申请号：US13269703

申请日：2011-10-10

申请人： Takeki Sugahara ,  Masao Ueno

发明人： Takeki Sugahara ,  Masao Ueno

IPC分类号： G05F5/00

摘要： A switching power supply is provided to supply an AC input voltage. The supply includes a control circuit configured to detect a voltage of the AC power source in a voltage waveform, and switch elements in a synchronous rectification switching mode in synchronization with polarities of the voltage waveform when the AC input voltage is equal to or greater than a predetermined voltage value. The control unit also operates the switching without synchronization with the polarities when the AC input voltage is smaller than the predetermined voltage value.