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    • 11. 发明公开
    • A switched mode power supply circuit
    • 开关模式电源电路
    • EP3029471A1
    • 2016-06-08
    • EP14196404.9
    • 2014-12-04
    • ROHM CO., LTD.
    • Mladenova, Irina
    • G01R15/20H02M3/335
    • H02M3/33507G01R15/202H02M3/33523
    • A switched mode power supply, SMPS, circuit (1) comprising a transformer (4) configured to convert an input voltage (Vin) applied to a primary winding (5) of the transformer (4) into an output voltage at a secondary winding (6) of the transformer (4), a galvanic isolated feedback circuit (10) configured to control the output voltage at the secondary winding (6) of the transformer (4), wherein the galvanic isolated feedback circuit (10) comprises an inductor (13) to which the output voltage of the secondary winding (6) of the transformer (4) is applied to generate a magnetic field measured by a Hall sensor (13) of that galvanic isolated feedback circuit (10) to provide a control voltage used to control the output voltage at the secondary winding (6) of the transformer (4). The output voltage at the secondary winding can be constant, but changing the duty cycle controls the output voltage of the whole device.
    • 一种包括变压器(4)的开关模式电源SMPS电路(1),变压器(4)被配置为将施加到变压器(4)的初级绕组(5)的输入电压(Vin)转换为次级绕组 所述电流隔离反馈电路(10)包括电感器(6),所述电流隔离反馈电路(10)被配置为控制所述变压器(4)的所述次级绕组(6)处的输出电压, 13),施加变压器(4)的次级绕组(6)的输出电压以产生由该电流隔离反馈电路(10)的霍尔传感器(13)测量的磁场,以提供使用的控制电压 以控制变压器(4)的次级绕组(6)处的输出电压。 次级绕组的输出电压可以保持恒定,但改变占空比可以控制整个器件的输出电压。