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公开(公告)号：US20170104417A1
公开(公告)日：2017-04-13
申请号：US14879146
申请日：2015-10-09
申请人： DELL PRODUCTS, L.P.
发明人： Tsai-Fu Hung , Yu-Hung Lai , Shih-Chieh Wang , Feng-Yu Wu
CPC分类号： H02M3/33546 , H02M1/14 , H02M1/42 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： Systems and methods for reducing the line frequency ripple in a resonant converter are described. In some embodiments, a power supply includes a switching network; an LLC resonant tank coupled to the switching network; a rectifier coupled to the LLC resonant tank; and a control circuit coupled to the switching network and to the rectifier, where the control circuit is configured to modify an operating frequency of the switching network to reduce a line frequency ripple at an output of the rectifier.
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2.发明申请公开(公告)号：US20170063239A1
公开(公告)日：2017-03-02
申请号：US14841669
申请日：2015-08-31
申请人： DELL PRODUCTS, L.P.
发明人： Feng-Yu WU , Tsai-Fu Hung , Shin-Chen Wang , Shiguo Luo , Kejiu Zhang
IPC分类号： H02M3/158
CPC分类号： H02M3/1584 , G06F1/26 , H02M2001/0009 , H02M2003/1586
摘要： A method and an information handling system (IHS) perform current calibration of a multi-phase voltage regulator (VR) by using a calibrated operating phase to calibrate an unknown operating phase. A calibration controller, using a pulse width modulation (PWM) controller, enables a first unknown operating phase within a first converter sub-circuit in the multiphase VR. The calibration controller enables a calibrated circuit component electronically coupled to the first unknown operating phase. The calibration controller determines a target voltage for the first unknown operating phase based on sense component specifications. The calibration controller determines, for the first unknown operating phase, a sense voltage that identifies the first unknown operating phase as a first evaluated operating phase. The calibration controller performs calibration of operating phases of the multi-phase VR, including the first evaluated operating phase, based on a respective difference between a sense voltage and a corresponding target voltage for each operating phase.
摘要翻译： 方法和信息处理系统（IHS）通过使用经校准的操作阶段来校准未知的操作阶段来执行多相电压调节器（VR）的当前校准。 使用脉冲宽度调制（PWM）控制器的校准控制器使多相VR中的第一转换器子电路内的第一未知操作相位能够实现。 校准控制器使得能够电连接到第一未知操作阶段的经校准的电路部件。 校准控制器基于感测部件规格确定用于第一未知操作阶段的目标电压。 校准控制器在第一未知操作阶段确定将第一未知操作阶段识别为第一评估操作阶段的感测电压。 基于每个操作阶段的感测电压和相应的目标电压之间的相应差异，校准控制器执行包括第一评估的操作阶段的多相VR的操作阶段的校准。
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公开(公告)号：US09735690B2
公开(公告)日：2017-08-15
申请号：US14879146
申请日：2015-10-09
申请人： Dell Products, L.P.
发明人： Tsai-Fu Hung , Yu-Hung Lai , Shih-Chieh Wang , Feng-Yu Wu
CPC分类号： H02M3/33546 , H02M1/14 , H02M1/42 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： Systems and methods for reducing the line frequency ripple in a resonant converter are described. In some embodiments, a power supply includes a switching network; an LLC resonant tank coupled to the switching network; a rectifier coupled to the LLC resonant tank; and a control circuit coupled to the switching network and to the rectifier, where the control circuit is configured to modify an operating frequency of the switching network to reduce a line frequency ripple at an output of the rectifier.
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公开(公告)号：US20170033677A1
公开(公告)日：2017-02-02
申请号：US14810694
申请日：2015-07-28
申请人： Dell Products L.P.
发明人： Feng-Yu Wu , Tsai-Fu Hung
CPC分类号： H02M1/08 , H02M3/07 , H02M3/158 , H02M3/1588
摘要： Systems and methods for operating a switching converter are disclosed. The switching converter includes a high-side transistor coupled between a voltage input and a switching node and a low-side transistor coupled between the switching node and ground. The switching converter also includes a high-side driver coupled to drive a gate of the high-side transistor, a charge pump coupled to the high-side driver, and a bootstrap circuit, which includes a pass transistor coupled between the charge pump and the switching node, and a pull-down transistor coupled between the charge pump and ground.
摘要翻译： 公开了用于操作开关转换器的系统和方法。 开关转换器包括耦合在电压输入和开关节点之间的高侧晶体管和耦合在开关节点和地之间的低侧晶体管。 开关转换器还包括耦合以驱动高侧晶体管的栅极的高侧驱动器，耦合到高侧驱动器的电荷泵和自举电路，其包括耦合在电荷泵和电荷泵之间的通过晶体管 开关节点和耦合在电荷泵和地之间的下拉晶体管。
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5.发明申请公开(公告)号：US20170060213A1
公开(公告)日：2017-03-02
申请号：US14841676
申请日：2015-08-31
申请人： DELL PRODUCTS, L.P.
发明人： Feng-Yu WU , Tsai-Fu Hung , Shin-Chen Wang , Shiguo Luo , Kejiu Zhang
摘要： An information handling system (IHS) performs current calibration of a multi-phase VR using leakage current as a reference current. The IHS includes a multi-phase voltage regulator (VR) module coupled to an output port of a power supply unit (PSU). The VR module includes: a multi-phase VR having an integrated power stage that provides pulse width modulation (PWM) functionality for controlling operating phases of VR current in the multi-phase VR; and a digital controller coupled to the multi-phase VR. The controller: enables a known, high accuracy operating phase as loading calibrator for offset training; records a leakage current value as a reference current; enables a first unknown, low accuracy operating phase; determines, for the unknown operating phase, an offset value that provides a specified target current accuracy; updates an offset register for the unknown operating phase with the corresponding offset value; and disables the unknown operating phase.
摘要翻译： 信息处理系统（IHS）使用泄漏电流作为参考电流来执行多相VR的电流校准。 IHS包括耦合到电源单元（PSU）的输出端口的多相电压调节器（VR）模块。 VR模块包括：具有集成功率级的多相VR，其提供用于控制多相VR中的VR电流的工作相位的脉宽调制（PWM）功能; 以及耦合到多相VR的数字控制器。 控制器：使已知的高精度工作阶段成为校正校正器的偏移量; 记录泄漏电流值作为参考电流; 启用第一个未知，低精度的操作阶段; 为未知运行阶段确定提供指定目标电流精度的偏移值; 使用相应的偏移值更新未知运行阶段的偏移量寄存器; 并禁用未知的操作阶段。
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公开(公告)号：US20160134108A1
公开(公告)日：2016-05-12
申请号：US14534317
申请日：2014-11-06
申请人： Dell Products L.P.
发明人： Tsai-Fu Hung , Shih-Chieh Wang , Yi-Chiao Hsu , Chung-Fu Lai
摘要： Active droop current sharing among power supply units may regulate output currents of power supply units supplying shared current to a common load. The regulation may employ a combination of droop control and active current control. The shared current may be regulated such that each power supply unit provides a substantially equal share of the total current supplied. A current difference between two power supplies may be regulated to be within a desired maximum threshold for current difference.
摘要翻译： 电源单元之间的主动下降电流共享可以调节向公共负载提供共享电流的电源单元的输出电流。 该调节可以采用下垂控制和有功电流控制的组合。 可以调节共享电流，使得每个电源单元提供所提供的总电流的基本相等的份额。 可以将两个电源之间的电流差调节到用于电流差的期望的最大阈值内。
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公开(公告)号：US09971389B2
公开(公告)日：2018-05-15
申请号：US14841676
申请日：2015-08-31
申请人： DELL PRODUCTS, L.P.
发明人： Feng-Yu Wu , Tsai-Fu Hung , Shin-Chen Wang , Shiguo Luo , Kejiu Zhang
摘要： An information handling system (IHS) performs current calibration of a multi-phase VR using leakage current as a reference current. The IHS includes a multi-phase voltage regulator (VR) module coupled to an output port of a power supply unit (PSU). The VR module includes: a multi-phase VR having an integrated power stage that provides pulse width modulation (PWM) functionality for controlling operating phases of VR current in the multi-phase VR; and a digital controller coupled to the multi-phase VR. The controller: enables a known, high accuracy operating phase as loading calibrator for offset training; records a leakage current value as a reference current; enables a first unknown, low accuracy operating phase; determines, for the unknown operating phase, an offset value that provides a specified target current accuracy; updates an offset register for the unknown operating phase with the corresponding offset value; and disables the unknown operating phase.
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公开(公告)号：US09853447B2
公开(公告)日：2017-12-26
申请号：US14534317
申请日：2014-11-06
申请人： Dell Products L.P.
发明人： Tsai-Fu Hung , Shih-Chieh Wang , Yi-Chiao Hsu , Chung-Fu Lai
摘要： Active droop current sharing among power supply units may regulate output currents of power supply units supplying shared current to a common load. The regulation may employ a combination of droop control and active current control. The shared current may be regulated such that each power supply unit provides a substantially equal share of the total current supplied. A current difference between two power supplies may be regulated to be within a desired maximum threshold for current difference.
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公开(公告)号：US09577505B1
公开(公告)日：2017-02-21
申请号：US14810694
申请日：2015-07-28
申请人： Dell Products L.P.
发明人： Feng-Yu Wu , Tsai-Fu Hung
CPC分类号： H02M1/08 , H02M3/07 , H02M3/158 , H02M3/1588
摘要： Systems and methods for operating a switching converter are disclosed. The switching converter includes a high-side transistor coupled between a voltage input and a switching node and a low-side transistor coupled between the switching node and ground. The switching converter also includes a high-side driver coupled to drive a gate of the high-side transistor, a charge pump coupled to the high-side driver, and a bootstrap circuit, which includes a pass transistor coupled between the charge pump and the switching node, and a pull-down transistor coupled between the charge pump and ground.
摘要翻译： 公开了用于操作开关转换器的系统和方法。 开关转换器包括耦合在电压输入和开关节点之间的高侧晶体管和耦合在开关节点和地之间的低侧晶体管。 开关转换器还包括耦合以驱动高侧晶体管的栅极的高侧驱动器，耦合到高侧驱动器的电荷泵和自举电路，其包括耦合在电荷泵和电荷泵之间的通过晶体管 开关节点和耦合在电荷泵和地之间的下拉晶体管。
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10.发明授权Method for extending power supply hold-up time by controlling a transformer turn ratio 有权通过控制变压器匝数比来延长电源保持时间的方法公开(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
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。
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