公开(公告)号：US09455637B2

公开(公告)日：2016-09-27

申请号：US14588228

申请日：2014-12-31

申请人： Dell Products, L.P.

发明人： Tsai-Fu Hung ,  Hung-Hsun Tsai ,  Yu-Hung Lai ,  Kuang-Hao Chou

IPC分类号： H02M5/10 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M3/285 ,  H02M3/33576 ,  H02M3/3378 ,  H02M5/12 ,  H02M2001/0058 ,  H02M2001/0096 ,  Y02B70/1491

摘要： In one embodiment a method of extending power supply hold-up time by controlling a transformer turn ratio may include an input capacitor receiving an input voltage of a transformer unit. A first control transistor may switch a first transformer winding to an on state in response to the input voltage being above a voltage threshold level. The first control transistor may switch the first transformer winding to an off state in response to the input voltage being below the voltage threshold level. A second control transistor may switch a second transformer winding to an on state in response to the input voltage being below the voltage threshold level, wherein the first transformer winding and the second transformer winding may include separate windings located on a same side of a magnetic core of the transformer unit. In an embodiment the transformer unit may include a power supply unit.

摘要翻译： 在一个实施例中，通过控制变压器匝数比来延长电源保持时间的方法可以包括接收变压器单元的输入电压的输入电容器。 响应于输入电压高于电压阈值电平，第一控制晶体管可以将第一变压器绕组切换到接通状态。 第一控制晶体管可以响应于输入电压低于电压阈值电平而将第一变压器绕组切换到断开状态。 第二控制晶体管可以响应于输入电压低于电压阈值电平而将第二变压器绕组切换到接通状态，其中第一变压器绕组和第二变压器绕组可以包括位于磁芯的同一侧上的单独绕组 的变压器单元。 在一个实施例中，变压器单元可以包括电源单元。

公开(公告)号：US10338658B2

公开(公告)日：2019-07-02

申请号：US15154450

申请日：2016-05-13

申请人： DELL PRODUCTS, L.P.

发明人： Tsai-Fu Hung ,  Shih-Chieh Wang ,  Kuang-Hao Chou ,  Dennis A. Martin

IPC分类号： G06F1/30 ,  H02M1/08 ,  H02M1/42 ,  H02M1/44 ,  H02M3/04 ,  H02M1/00 ,  H02M7/06 ,  H02M1/36 ,  H02M3/158

摘要： A power supply for an information handling system includes a rectifier circuit that is coupled to a power factor correction circuit. The power factor correction circuit includes a bulk capacitor. An extended hold-up capacitor is coupled in parallel to the bulk capacitor, via an electronic switch. The electronic switch has a first terminal coupled to the bulk capacitor and a second terminal coupled to the extended hold-up capacitor. A control circuit is coupled to a third terminal of the electronic switch and controls the operation of the electronic switch. An extended hold-up circuit is coupled to the extended hold-up capacitor and an output terminal of the power factor correction circuit. A digital signal controller is coupled to the extended hold-up circuit. The digital signal controller controls the operation of the extended hold-up circuit, and a DC to DC converter is coupled to the extended hold-up circuit.

公开(公告)号：US20160190934A1

公开(公告)日：2016-06-30

申请号：US14588228

申请日：2014-12-31

申请人： Dell Products, L.P.

发明人： Tsai-Fu Hung ,  Hung-Hsun Tsai ,  Yu-Hung Lai ,  Kuang-Hao Chou

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M3/285 ,  H02M3/33576 ,  H02M3/3378 ,  H02M5/12 ,  H02M2001/0058 ,  H02M2001/0096 ,  Y02B70/1491

摘要： In one embodiment a method of extending power supply hold-up time by controlling a transformer turn ratio may include an input capacitor receiving an input voltage of a transformer unit. A first control transistor may switch a first transformer winding to an on state in response to the input voltage being above a voltage threshold level. The first control transistor may switch the first transformer winding to an off state in response to the input voltage being below the voltage threshold level. A second control transistor may switch a second transformer winding to an on state in response to the input voltage being below the voltage threshold level, wherein the first transformer winding and the second transformer winding may include separate windings located on a same side of a magnetic core of the transformer unit. In an embodiment the transformer unit may include a power supply unit.

摘要翻译： 在一个实施例中，通过控制变压器匝数比来延长电源保持时间的方法可以包括接收变压器单元的输入电压的输入电容器。 响应于输入电压高于电压阈值电平，第一控制晶体管可以将第一变压器绕组切换到接通状态。 第一控制晶体管可以响应于输入电压低于电压阈值电平而将第一变压器绕组切换到断开状态。 第二控制晶体管可以响应于输入电压低于电压阈值电平而将第二变压器绕组切换到接通状态，其中第一变压器绕组和第二变压器绕组可以包括位于磁芯的同一侧上的单独绕组 的变压器单元。 在一个实施例中，变压器单元可以包括电源单元。