Power supply circuit
AssigneesHONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Hon Hai Precision Industry Co., Ltd.
InventorsLing-Yu Xie, Xing-Ping Xie
Life of this patent
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Abstract
A power supply circuit includes a voltage regulating circuit, a control circuit, and a switch circuit. The voltage regulating circuit receives an AC voltage signal from a live wire output terminal and converts the AC voltage signal to a control signal. The control circuit receives the control signal and turns on or turns off an electronic connection from the AC voltage signal to the switch circuit according to the control signal. The switch circuit is configured to be powered on and output the AC voltage signal when the electronic connection from the AC voltage signal to the switch circuit is turned on.
Claims15
A power supply circuit comprising:
- a voltage regulating circuit configured to receive an AC voltage signal from a live wire output terminal and convert the AC voltage signal to a control signal;
- a control circuit configured to receive the control signal;
- and
- a switch circuit configured to be powered on and output the AC voltage signal when electrically connected to the AC voltage signal;
- wherein the control circuit is configured to turning on or turning off an electronic connection from the AC voltage signal to the switch circuit according to the control signal;
- wherein the control circuit comprises a under voltage control circuit and an over voltage control circuit;
- the under voltage control circuit is configured to receive the control signal and does not output voltage signal when the AC voltage signal is under voltage;
- and the over voltage control circuit is configured to receive the control signal and to turn on when the AC voltage signal is over voltage.
A power supply circuit comprising:
- a voltage regulating circuit configured to receive an AC voltage signal from a live wire output terminal and convert the AC voltage signal to a control signal;
- a control circuit configured to receive the control signal;
- and
- a switch circuit configured to be powered on and output the AC voltage signal when electrically connected to the AC voltage signal;
- wherein when the AC voltage signal is normal, the control circuit turns on to electrically connected the AC voltage signal to the switch circuit, and the switch circuit is powered on to output the AC voltage signal;
- when the AC voltage signal is over voltage or under voltage, the control circuit turns off to turn off an electronic connection from the AC voltage signal to the switch circuit, and the switch circuit is powered off and does not output the AC voltage signal;
- wherein the voltage regulating circuit comprises single-pole double-throw (SPDT), a first resistor, a second resistor and a third resistor;
- the SPDT comprises a SPDT first terminal, a SPDT second terminal, and a SPDT third terminal;
- the first resistor is electrically connected between the live wire output terminal and the SPDT first terminal;
- the SPDT second terminal is electrically connected to a Neutral wire output terminal via the second resistor;
- and the SPDT third terminal is electrically connected to the Neutral wire output terminal via the third resistor.
Dependencies are inferred from the claim text.