公开(公告)号：US09484818B2

公开(公告)日：2016-11-01

申请号：US14763279

申请日：2014-01-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masashi Okamatsu ,  Hideki Tanaka ,  Katsuya Hagiwara ,  Masahiro Tochigi ,  Takashi Ueda

IPC: G05F1/56 ,  H02M3/158 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M3/1582 ,  H02M2001/0006

Abstract: A DC-DC converter includes first and second switching devices electrically connected in series between an input terminal and a ground terminal, third and fourth switching devices electrically connected in series between an output terminal and the ground terminal, an inductor, a drive circuit that drives the first switching device to turn on and off, a bootstrap capacitor circuit connected electrically to the drive circuit, and a control circuit. The control circuit is operable to turn on and off the switching devices serially connected with each other after a simultaneous-off duration for which both of the switching devices are continuously turned off. The control circuit is operable to charge the bootstrap capacitor by continuously turning on keeping the second switching device for a charging duration while continuously turning off the first switching device for a sustaining duration determined by the simultaneous-off duration and the charging duration. This DC-DC converter can reduce a current ripple even when the bootstrap capacitor is charged.

Abstract translation: DC-DC转换器包括串联地电连接在输入端子和接地端子之间的第一和第二开关装置，串联地电连接在输出端子和接地端子之间的第三和第四开关装置，电感器，驱动电路 第一开关装置接通和断开，与驱动电路电连接的自举电容电路和控制电路。 控制电路可操作以在两个开关装置连续断开的同时关断持续时间之后导通和断开彼此串联的开关装置。 所述控制电路可操作以通过在连续地打开所述第二开关装置一个充电持续时间的同时对所述自举电容器进行充电，同时连续地关闭所述第一开关装置持续由所述同时关断持续时间和所述充电持续时间确定的持续时间。 即使自举电容充电，该DC-DC转换器也可以减小电流纹波。

公开(公告)号：US09479055B2

公开(公告)日：2016-10-25

申请号：US14647596

申请日：2013-11-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masashi Okamatsu ,  Hideki Tanaka ,  Katsuya Hagiwara ,  Masahiro Tochigi ,  Takashi Ueda

IPC: H02M3/158 ,  H03K17/687

CPC classification number: H02M3/158 ,  H02M3/1582 ,  H03K17/6871 ,  H03K2217/0045 ,  H03K2217/0081

Abstract: A DC-DC converter includes a switching device, a drive circuit for turning on and off the switching device, a bootstrap capacitor electrically connected to the drive circuit, and a control circuit electrically connected to the drive circuit. The control circuit is operable to charge the bootstrap capacitor for a charging duration periodically at a charging period longer than an on-off period at which the switching device is turned on and off periodically. This DC-DC converter performs efficient boost and step-down operations.

Abstract translation: DC-DC转换器包括开关装置，用于导通和断开开关装置的驱动电路，电连接到驱动电路的自举电容器，以及与驱动电路电连接的控制电路。 控制电路可操作以在比开关装置周期性地接通和断开的开 - 关时间长的充电周期周期性地为自举电容器充电充电持续时间。 该DC-DC转换器执行有效的升压和降压操作。