Power supply circuit having standby detection circuit
First Claim
1. A power supply circuit, comprising:
- a voltage output controller comprising a first switching element and a second switching element;
a standby controller, comprising a trigger and a third switching element, the trigger comprising an input terminal and an output terminal;
a standby detection circuit configured for detecting a mode of a load, the standby detection circuit comprising an input terminal and two output terminals; and
a microprocessor comprising a first input terminal, a second input terminal, and an output terminal;
wherein each of the first, second, and third switching elements comprises an input terminal, an output terminal, and a control terminal, each input terminal of the second and the third switching elements being applied with a direct current voltage, the input terminal of the first switching element being connected to ground, the output terminal of the first switching element being connected to the control terminal of the second switching element, the control terminal of the first switching element being connected to the output terminal of the third switching element, the output terminal of the second switching element being connected to the load, and the first input terminal of the microprocessor, the input terminal of the standby detection circuit being connected to the load, the two output terminals of the standby detection circuit being connected to an input terminal of the microprocessor and the input terminal of the trigger, the output terminal of the trigger being connected to the control terminal of the third switching element and the input terminal of the microprocessor, wherein when the input terminal of the standby detection circuit detects the load entering an active mode from a power off mode, the standby detection circuit sends a control signal to the trigger, the trigger generating a voltage to turn on the third switching element, the direct current voltage being applied to the first switching element via the third switching element, the first and the second switching elements being turned on sequentially, the direct current voltage being applied to the load and the microprocessor via the second switching element, wherein when the standby detection circuit detects the load entering a standby mode from the active mode, the standby detection circuit sends another control signal to the microprocessor, the microprocessor controlling the third switching element, and the first and the second switching elements to be turned off sequentially such that power is restricted from reaching the load and the microprocessor, the power supply circuit being in the standby mode.
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Accused Products
Abstract
A power supply circuit includes a voltage output controller configured for outputting voltages, a standby controller configured for directing the voltage output controller to provide voltage to a load, and a microprocessor configured for controlling the standby controller according to a mode of the load. The voltage output controller is applied with a direct current voltage. When the load enters active mode from a powered off mode, the standby controller sends a control signal to the voltage output controller to output direct current voltage to the load and the microprocessor. When the load enters standby mode from the active mode, the microprocessor directs the standby controller to prevent the voltage output controller from outputting direct current voltage to the load and the microprocessor.
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Citations
19 Claims
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1. A power supply circuit, comprising:
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a voltage output controller comprising a first switching element and a second switching element; a standby controller, comprising a trigger and a third switching element, the trigger comprising an input terminal and an output terminal; a standby detection circuit configured for detecting a mode of a load, the standby detection circuit comprising an input terminal and two output terminals; and a microprocessor comprising a first input terminal, a second input terminal, and an output terminal; wherein each of the first, second, and third switching elements comprises an input terminal, an output terminal, and a control terminal, each input terminal of the second and the third switching elements being applied with a direct current voltage, the input terminal of the first switching element being connected to ground, the output terminal of the first switching element being connected to the control terminal of the second switching element, the control terminal of the first switching element being connected to the output terminal of the third switching element, the output terminal of the second switching element being connected to the load, and the first input terminal of the microprocessor, the input terminal of the standby detection circuit being connected to the load, the two output terminals of the standby detection circuit being connected to an input terminal of the microprocessor and the input terminal of the trigger, the output terminal of the trigger being connected to the control terminal of the third switching element and the input terminal of the microprocessor, wherein when the input terminal of the standby detection circuit detects the load entering an active mode from a power off mode, the standby detection circuit sends a control signal to the trigger, the trigger generating a voltage to turn on the third switching element, the direct current voltage being applied to the first switching element via the third switching element, the first and the second switching elements being turned on sequentially, the direct current voltage being applied to the load and the microprocessor via the second switching element, wherein when the standby detection circuit detects the load entering a standby mode from the active mode, the standby detection circuit sends another control signal to the microprocessor, the microprocessor controlling the third switching element, and the first and the second switching elements to be turned off sequentially such that power is restricted from reaching the load and the microprocessor, the power supply circuit being in the standby mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power supply circuit, comprising:
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a voltage output controller, comprising a first switching element and a second switching element; a standby controller, comprising a trigger, a third switching element, and a manual switch, the trigger comprising an input terminal and an output terminal; and a microprocessor comprising an input terminal, and an output terminal; wherein each of the first, the second, and the third switching elements comprises an input terminal, an output terminal, and a control terminal, each input terminal of the second and the third switching elements being applied with a direct current voltage, the input terminal of the first switching element being connected to ground, the output terminal of the first switching element being connected to the control terminal of the second switching element, the control terminal of the first switching element being connected to the output terminal of the third switching element, the output terminal of the second switching element being connected to the load and the first input terminal of the microprocessor, the input terminal of the trigger being connected to the manual switch, the output terminal of the trigger being connected to the control terminal of the third switching element and the output terminal of the microprocessor, wherein activation of the manual switch generates a first control signal then provided to the trigger, the trigger generating a voltage signal to turn on the third switching element, the direct current voltage being applied to the first switching element via the third switching element, the first and the second switching elements being turned on sequentially, the direct current voltage being applied to the load and the microprocessor via the second switching element, the power supply circuit entering an active mode from a powered off mode; and
upon a subsequent activation of the manual switch, a second control signal is generated and applied to the microprocessor, the microprocessor turning off the third, the first, and the second switching elements sequentially, the second switching element stopping voltage to the load and the microprocessor, and the power supply circuit entering a standby mode from the active mode. - View Dependent Claims (11, 12, 13, 14)
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15. A power supply circuit, comprising:
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a voltage output controller for outputting voltages, the voltage output controller comprising a first switching element and a second switching element; a standby controller for controlling the voltage output controller whether to provide the voltages to a load, the standby controller comprising a third switching element; and a microprocessor; wherein each of the first, second, and third switching elements comprises an input terminal, an output terminal, and a control terminal, each input terminal of the second and the third switching elements are applied with a direct current voltage, the input terminal of the first switching element is connected to ground, the output terminal of the first switching element is connected to the control terminal of the second switching element, the control terminal of the first switching element is connected to the output terminal of the third switching element, the output terminal of the second switching element is connected to the load and the microprocessor, the microprocessor is capable of generating a control signal to the standby controller when the load enters a standby mode from an active mode, and the standby controller receives the control signal to control the third switching element, the first switching element and the second switching element to be turned off sequentially such that the voltages are restricted from reaching the load and the microprocessor, and the power supply circuit enters the standby mode. - View Dependent Claims (16, 17, 18, 19)
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Specification