US 2018/0294718 A1Published application

Power control circuit and method thereof

AssigneeRichWave Technology Corp.

InventorsCHIH-SHENG CHEN, SHENG-TSUNG WANG

Life of this patent

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Abstract

A power control circuit provides a supply voltage, and includes a voltage regulating circuit and a signal selecting circuit. The voltage regulating circuit is coupled to a power supply voltage and the output end of the power control circuit, and receives a first control signal for outputting the supply voltage. The signal selecting circuit has a first input end, a second input end and a third input end. The first input end of the signal selecting circuit receives a first input signal, the second input end of the signal selecting circuit receives a second input signal, and the third input end of the signal selecting circuit receives a second control signal. The first input signal is related to the power supply voltage. One of the first input signal and the second input signal is chosen and outputted as the first control signal according to the second control signal.

Claims20

Dependent claims

A power control circuit, configured to provide a supply voltage to an output end of the power control circuit, comprising:

a voltage regulating circuit, configured to couple to a power supply voltage and the output end of the power control circuit, configured to receive a first control signal and output the supply voltage to the output end of the power control circuit according to the first control signal;
and
a signal selecting circuit, having a first input end, a second input end, a third input end and an output end, wherein the first input end of the signal selecting circuit is configured to receive a first input signal, the second input end of the signal selecting circuit is configured to receive a second input signal, and the third input end of the signal selecting circuit configured to receive a second control signal;
wherein the first input signal is related to the power supply voltage, one of the first input signal and the second input signal is chosen as the first control signal according to the second control signal, and the first control signal is outputted from the output end of the signal selecting circuit.

1 more element

A power control method, applied to a power control circuit, wherein the power control circuit is configured to provide a supply voltage to an output end of the power control circuit and includes a voltage regulating circuit and a signal selecting circuit, wherein the voltage regulating circuit is configured to couple to a power supply voltage and the output end of the power control circuit, and the power control method comprises:

through the voltage regulating circuit, receiving a first control signal and outputting the supply voltage to the output end of the power control circuit according to the first control signal;
through the signal selecting circuit, receiving a first input signal, a second input signal and a second control signal, wherein the first input signal is related to the power supply voltage;
and
through the signal selecting circuit, choosing one of the first input signal and the second input signal as the first control signal according to the second control signal and outputting the first control signal.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/844,598Filed 17 Dec 2017
Priority: TW 1061114045 Apr 2017
Published: 11 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H02M 3/156
Using semiconductor devices only: with automatic control of output voltage or current, e.g. switching regulators
G05F 1/468
Wherein the variable actually regulated by the final control device is DC: characterised by reference voltage circuitry, e.g. soft start, remote…
G05F 1/565
Using semiconductor devices in series with the load as final control devices: sensing a condition of the system or its load in addition to means…
G05F 1/575
Using semiconductor devices in series with the load as final control devices: characterised by the feedback circuit