公开(公告)号：US20180348804A1

公开(公告)日：2018-12-06

申请号：US15780361

申请日：2017-02-20

Applicant: DENSO CORPORATION

Inventor： Hiroyuki SATAKE ,  Shinya UEMURA ,  Yuki MIKAMI

IPC: G05F1/56 ,  H02M3/156 ,  H02M1/36 ,  H02J7/00

CPC classification number: G05F1/56 ,  H02J7/0065 ,  H02M1/36 ,  H02M3/155 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0054

Abstract: A power supply device comprises: a first linear regulator, which receives a voltage from a direct-current power supply at all times and outputs a first voltage; a step-down switching regulator, which receives the voltage from the direct-current power supply through a path via a power supply switch and outputs an intermediate voltage, and a second linear regulator, which receives the intermediate voltage and outputs a second voltage. The power supply device outputs a higher one of the first voltage and the second voltage. The first linear regulator has a smaller current consumption and a higher minimum operating voltage than the second linear regulator. When the voltage supplied from the direct-current power supply is lower than or equal to a predetermined threshold value, the switching regulator drives a main switching component interposed in series with a voltage input-output path to turn on at all times. The second linear regulator executes an output operation of the second voltage during a full-on period, during which the main switching component is driven to turn on at all times.

公开(公告)号：US20160087526A1

公开(公告)日：2016-03-24

申请号：US14852705

申请日：2015-09-14

Applicant: DENSO CORPORATION

Inventor： Hiroyuki SATAKE ,  Yoshihiro KIZAKI

IPC: H02M3/156 ,  H02M1/36

CPC classification number: H02M3/156 ,  H02M1/36

Abstract: A switching power device includes: a main circuit having a switching element and a coil that adjusts a current flowing through the coil and outputs a voltage; an output voltage detection circuit that outputs a first voltage; an error amplification circuit that outputs an error signal in response to a difference between the first voltage of the output voltage detection circuit and a second voltage; an oscillation circuit that outputs an oscillation signal; a driving circuit that outputs the driving signal to the switching element in response to a comparison result by comparing the oscillation signal of the oscillation circuit and the error signal of the error amplification circuit; and a soft-start control unit that controls the second voltage in response to the first voltage of the output voltage detection circuit when the first voltage reaches a soft-start threshold voltage between a standard detection voltage and a start detection voltage.

Abstract translation: 开关电源装置包括：主电路，具有开关元件和线圈，其调节流过线圈的电流并输出电压; 输出电压检测电路，输出第一电压; 误差放大电路，其输出响应于所述输出电压检测电路的第一电压和第二电压之间的差的误差信号; 输出振荡信号的振荡电路; 驱动电路，通过比较振荡电路的振荡信号和误差放大电路的误差信号，响应于比较结果向开关元件输出驱动信号; 以及软启动控制单元，当第一电压达到标准检测电压和起始检测电压之间的软启动阈值电压时，响应于输出电压检测电路的第一电压来控制第二电压。