发明名称 |
SWITCHING POWER SUPPLY APPARATUS |
摘要 |
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. |
申请公布号 |
US2015349651(A1) |
申请公布日期 |
2015.12.03 |
申请号 |
US201514820529 |
申请日期 |
2015.08.06 |
申请人 |
Panasonic Intellectual Property Management Co., Ltd. |
发明人 |
MOROTA NAOHIKO;SAKURAI TATSUYA;SAJI TAKASHI;KAWABE KEITA;MURATA KAZUHIRO;SUZUKI KOJI;MORI YOSHIHIRO |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
代理机构 |
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代理人 |
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主权项 |
1. A switching power supply apparatus comprising:
a second switching element to which an input voltage is supplied; an output terminal connected to a load device; an input/output conversion circuit that converts the input voltage switched by the second switching element into an output voltage, and outputs the converted output voltage to the output terminal; a switching control circuit that controls switching operation of the second switching element, and has an off mode for stopping the switching operation in accordance with a signal input to an OFF terminal; a first rectifier circuit connected between the input/output conversion circuit and the output terminal; a transformer having a secondary winding wire whose first end is connected to a first terminal of the output terminal through a second rectifier circuit; a first switching element connected to a primary winding wire of the transformer; a pulse generator that supplies a pulse signal to a gate terminal of the first switching element; and a waveform detection circuit that detects a voltage or a current generated in the primary winding wire or the secondary winding wire of the transformer in accordance with operation of the 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 the OFF terminal. |
地址 |
Osaka JP |