公开(公告)号：US20110101951A1

公开(公告)日：2011-05-05

申请号：US12610097

申请日：2009-10-30

申请人： Zhiliang Zhang ,  Yan-Fei Liu

发明人： Zhiliang Zhang ,  Yan-Fei Liu

IPC分类号： G05F3/08

CPC分类号： H02M3/3376 ,  H02M3/33592 ,  H02M2001/0064 ,  Y02B70/1475

摘要： non-isolated full bridge (FB) converters have self-driven synchronous rectifier (SR) MOSFETs in the current doubler rectifier (CDR). The gate terminals of the SR MOSFETs are connected to the bridge leg midpoints of the FB converter. The primary side of the FB converter shares the same ground of the secondary side, which provides the gate drive path for the SRs. The asymmetrical control featuring zero-voltage-switching (ZVS) capability is applied to the two bridge legs of the FB converter respectively. This creates the right gate drive voltage waveforms for the SRs. The energy of the leakage inductance of the transformer is used to achieve SR gate energy recovery. High gate drive voltages can be used to reduce the on-resistance of SRs and the conduction loss. In this way, no additional gate driver circuitry is needed for the SRs compared to the conventional external drive circuitry for SRs. In this invention, the above features provide high conversion efficiency with high switching frequency. This can help to achieve high power density and fast dynamic response accordingly. The invented power circuits are suitable to low voltage and high current application.

摘要翻译： 非隔离全桥（FB）转换器在电流倍增整流器（CDR）中具有自驱动同步整流（SR）MOSFET。 SR MOSFET的栅极端子连接到FB转换器的桥脚中点。 FB转换器的初级侧共享二次侧相同的地，为SR提供栅极驱动路径。 具有零电压切换（ZVS）能力的非对称控制分别应用于FB转换器的两个桥臂。 这为SR创建了正确的栅极驱动电压波形。 变压器漏电的能量用于实现SR栅极能量回收。 可以使用高栅极驱动电压来降低SR的导通电阻和导通损耗。 以这种方式，与用于SR的常规外部驱动电路相比，SR不需要额外的栅极驱动器电路。 在本发明中，上述特征提供了高切换频率的高转换效率。 这有助于相应地实现高功率密度和快速的动态响应。 本发明的电源电路适用于低电压和高电流应用。

公开(公告)号：US20120068683A1

公开(公告)日：2012-03-22

申请号：US13234241

申请日：2011-09-16

申请人： Yan-Fei LIU ,  Zhiliang ZHANG ,  Jizhen FU

发明人： Yan-Fei LIU ,  Zhiliang ZHANG ,  Jizhen FU

IPC分类号： G05F3/08

CPC分类号： H02M1/08

摘要： Described herein are methods and circuits for driving a power switching device of a power converter. The methods and circuits include providing a negative gate to source voltage to the power switching device during an off transition of the power switching device, wherein the negative gate to source voltage is provided independent of one or more switching element for driving the power switching device; wherein body diode conduction by the one or more switching element is mitigated; wherein a circuit connected in parallel with the gate and source of the power switching device is used to set or define the negative gate to source voltage.

摘要翻译： 这里描述了用于驱动功率转换器的功率开关装置的方法和电路。 所述方法和电路包括在功率开关器件的断开转换期间向功率开关器件提供负栅极至源极电压，其中负栅极至源极电压独立于用于驱动功率开关器件的一个或多个开关元件而提供; 其中通过所述一个或多个开关元件的体二极管导通被减轻; 其中使用与电源开关器件的栅极和源极并联连接的电路来设置或限定负栅极到源极电压。

公开(公告)号：US08085083B2

公开(公告)日：2011-12-27

申请号：US12379481

申请日：2009-02-23

申请人： Zhiliang Zhang ,  Yan-Fei Liu

发明人： Zhiliang Zhang ,  Yan-Fei Liu

IPC分类号： H03K17/687

CPC分类号： H03K17/145 ,  H03K2217/0036

摘要： Provided is a current-source gate driver for use with a switching device having a gate capacitance, including an input terminal for receiving a DC voltage; a first switch connected between the input terminal and an output terminal; a second switch connected between the output terminal and a circuit common; a series circuit comprising a first capacitor and an inductor, the series circuit connected between the input terminal and the output terminal; wherein the gate capacitance of the switching device is connected between the output terminal and the circuit common. The current-source gate driver improves efficiency of the power switching devices of a voltage regulator module or other switching converter.

摘要翻译： 提供了一种与具有栅极电容的开关器件一起使用的电流源栅极驱动器，包括用于接收DC电压的输入端子; 连接在输入端和输出端之间的第一开关; 连接在输出端和电路之间的第二开关; 串联电路，包括第一电容器和电感器，串联电路连接在输入端子和输出端子之间; 其中开关器件的栅极电容连接在输出端子和电路公共端之间。 电流源栅极驱动器提高了电压调节器模块或其他开关转换器的功率开关器件的效率。

公开(公告)号：US20100019807A1

公开(公告)日：2010-01-28

申请号：US12379481

申请日：2009-02-23

申请人： Zhiliang Zhang ,  Yan-Fei Liu

发明人： Zhiliang Zhang ,  Yan-Fei Liu

IPC分类号： H03K3/00

CPC分类号： H03K17/145 ,  H03K2217/0036

摘要： Provided is a current-source gate driver for use with a switching device having a gate capacitance, including an input terminal for receiving a DC voltage; a first switch connected between the input terminal and an output terminal; a second switch connected between the output terminal and a circuit common; a series circuit comprising a first capacitor and an inductor, the series circuit connected between the input terminal and the output terminal; wherein the gate capacitance of the switching device is connected between the output terminal and the circuit common. The current-source gate driver improves efficiency of the power switching devices of a voltage regulator module or other switching converter.

摘要翻译： 提供了一种与具有栅极电容的开关器件一起使用的电流源栅极驱动器，包括用于接收DC电压的输入端子; 连接在输入端和输出端之间的第一开关; 连接在输出端和电路之间的第二开关; 串联电路，包括第一电容器和电感器，串联电路连接在输入端子和输出端子之间; 其中开关器件的栅极电容连接在输出端子和电路公共端之间。 电流源栅极驱动器提高了电压调节器模块或其他开关转换器的功率开关器件的效率。