公开(公告)号：US20150349651A1

公开(公告)日：2015-12-03

申请号：US14820529

申请日：2015-08-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： NAOHIKO MOROTA ,  TATSUYA SAKURAI ,  TAKASHI SAJI ,  KEITA KAWABE ,  KAZUHIRO MURATA ,  KOJI SUZUKI ,  YOSHIHIRO MORI

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A switching power supply apparatus of the present disclosure is a device connection state detection circuit that detects a connection state in a load device connection terminal in a power supply system having the load device connection terminal. The device connection state detection circuit includes a transformer, a switching element, a pulse generator, and a waveform detection circuit. The waveform detection circuit detects a voltage or a current generated in a primary winding wire or a secondary winding wire of the transformer in accordance with operation of a pulse signal, compares the detected voltage or current with a preset reference value, and outputs an output signal in accordance with a comparison result, to an OFF terminal.

Abstract translation: 本公开的开关电源装置是检测具有负载装置连接端子的电源系统中的负载装置连接端子的连接状态的装置连接状态检测电路。 设备连接状态检测电路包括变压器，开关元件，脉冲发生器和波形检测电路。 波形检测电路根据脉冲信号的操作检测变压器的初级绕组线或次级绕组中产生的电压或电流，将检测到的电压或电流与预设的参考值进行比较，并输出输出信号 根据比较结果，关闭终端。

公开(公告)号：US20170141690A1

公开(公告)日：2017-05-18

申请号：US15421614

申请日：2017-02-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TATSUYA SAKURAI ,  TAKASHI SAJI ,  YOSHIHISA MINAMI ,  KEITA KAWABE

IPC: H02M3/335

CPC classification number: H02M3/33569 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A switching power supply device of the present disclosure includes a device connection state detection circuit that detects a connection state in a load device connection terminal, in a power supply system having the load device connection terminal. The device connection state detection circuit includes a transformer, a switching element, a pulse generator, and a waveform detection circuit. The waveform detection circuit detects a voltage or a current generated at a connecting point between a primary winding wire of the transformer and the switching element in response to operation of a pulse signal. The waveform detection circuit compares the voltage or the current with a predetermined reference value, and outputs an output signal in response to a comparison result to an OFF terminal.

公开(公告)号：US20160036249A1

公开(公告)日：2016-02-04

申请号：US14882519

申请日：2015-10-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKASHI SAJI

IPC: H02J7/00

CPC classification number: H02J7/007 ,  H02J7/0052 ,  H02M3/33507 ,  H02M7/2176

Abstract: A direct current power supply circuit includes an alternating-current power supply; a rectification circuit for generating a direct-current voltage from an alternating-current voltage; a charging switch having an input terminal connected to the rectification circuit, the charging switch outputting an output voltage according to an input value input to a control terminal; a capacitor and a control circuit, which are connected to an output terminal; and a charging switch control circuit for generating a switch-on signal when the output voltage is equal to or lower than a first reference voltage value, and for generating a switch-off signal when the output voltage is equal to or higher than a second reference voltage value higher than the first reference voltage value, wherein a charging period setting circuit including at least one of the rectification circuit and the charging switch control circuit sets a charging period in which a charging current flows into the capacitor and a non-charging period in which the charging current does not flow, and in a case where the switch-on signal is generated during the charging period, the charging current flows through the charging switch when the direct-current voltage becomes equal to or higher than the output voltage, and in a case where the switch-on signal is generated during the non-charging period, the charging current does not flow through the charging switch even if the direct-current voltage becomes equal to or higher than the output voltage.

Abstract translation: 直流电源电路包括交流电源; 整流电路，用于从交流电压产生直流电压; 充电开关，其具有连接到整流电路的输入端子，充电开关根据输入到控制端子的输入值输出输出电压; 电容器和控制电路，其连接到输出端子; 以及充电开关控制电路，用于当所述输出电压等于或低于第一参考电压值时产生接通信号，并且用于当所述输出电压等于或高于第二参考值时产生关断信号 电压值高于第一参考电压值，其中包括整流电路和充电开关控制电路中的至少一个的充电周期设置电路设置充电电流流入电容器的充电时段和非充电时段 充电电流不流动，并且在充电期间产生接通信号的情况下，当直流电压变为等于或高于输出电压时，充电电流流过充电开关，并且 在非充电期间产生接通信号的情况下，即使在直流电路中，充电电流也不流过充电开关 nt电压变为等于或高于输出电压。