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    • 97. 发明申请
    • POWER SUPPLY CIRCUIT
    • 电源电路
    • US20120250381A1
    • 2012-10-04
    • US13435993
    • 2012-03-30
    • Yukio Takahashi
    • Yukio Takahashi
    • H02M7/06
    • H02M1/4225H02M2001/0032Y02B70/126Y02B70/16Y02P80/112
    • A power-supply circuit includes: a rectification circuit to output a rectified voltage obtained by rectifying an AC voltage; an inductor to be applied with the rectified voltage;a transistor to increase an inductor current when turned on; a diode to output the inductor current when the transistor is turned off; a capacitor to generate a DC voltage; a detection circuit to detect the inductor current; and a switching control circuit to perform switching of the transistor, when the detected current is smaller than a reference current, and stop switching of the transistor when the detected current is larger than the reference current, the target level corresponding to a level at which the diode is turned on when the rectified voltage rises, when the diode is turned on, the inductor and the capacitor respectively having inductance and capacitance values for allowing the inductor current larger than the reference current to flow.
    • 电源电路包括:整流电路,输出通过对AC电压进行整流而得到的整流电压; 应用整流电压的电感器; 一个晶体管,当开启时增加电感电流; 当晶体管截止时,二极管输出电感电流; 用于产生直流电压的电容器; 用于检测电感电流的检测电路; 以及开关控制电路,当所检测的电流小于参考电流时,进行晶体管的切换,并且当所检测的电流大于所述基准电流时,停止所述晶体管的切换,所述目标电平对应于 当整流电压上升时,二极管导通,二极管导通时,电感和电容分别具有电感和电容值,允许电感电流大于参考电流。