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US 10,897,202 B2Granted
Power source circuit with output voltage control and suppression of power consumption
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorChen Kong Teh
Life of this patent
Estimating the term…
Abstract
According to an embodiment, a power source circuit includes a switching element that is connected between an input terminal and an output terminal, a driving circuit that supplies a PWM driving signal to the switching element, a first control path that integrates a differential voltage between an output voltage and a reference voltage to output a first control signal, a second control path that converts the differential voltage into a digital signal to output a second control signal, and a PWM signal generation circuit that generates a PWM signal dependent on the first and second control signals.
Claims18
A power source circuit, comprising:
- a switching element with a main current path that is connected between an input terminal where an input voltage is applied thereto and an output terminal that supplies an output voltage thereto where turning on/off thereof is controlled by a PWM driving signal;
- a driving circuit that supplies the PWM driving signal to the switching element;
- a first control path that includes an integration circuit that outputs an integration signal provided by integrating a differential voltage between the output voltage and a reference voltage, and generates a first control signal;
- a second control path that includes an A/D converter that converts the differential voltage between the output voltage and the reference voltage into a digital signal, and generates a second control signal;
- and
- a PWM signal generation circuit that generates, and supplies to the driving circuit, a PWM signal with a pulse width that is adjusted depending on the first control signal and the second control signal,
- wherein the integration circuit includes:
- a voltage/current converter that outputs an output current dependent on the differential voltage between the output voltage and the reference voltage;
- and
- a capacitor that is charged with the output current of the voltage/current converter.
7 more elements
A power source circuit, comprising:
- a switching element with a main current path that is connected between an input terminal where an input voltage is applied thereto and an output terminal that supplies an output voltage thereto where turning on/off thereof is controlled by a PWM driving signal;
- a driving circuit that supplies the PWM driving signal to the switching element;
- a first control path that includes an integration circuit that outputs an integration signal provided by integrating a differential voltage between the output voltage and a reference voltage, and outputs a first control signal;
- a second control path that includes an A/D converter that converts the differential voltage between the output voltage and the reference voltage into a digital signal, and outputs a second control signal;
- and
- a comparison circuit that compares an addition signal provided by adding the second control signal and the first control signal and a predetermined triangle wave and generates a PWM signal with a pulse width that is adjusted depending on a result of such comparison.
3 more elements
A power source circuit, comprising:
- a switching element with a main current path that is connected between an input terminal where an input voltage is applied thereto and an output terminal that supplies an output voltage thereto where turning on/off thereof is controlled by a PWM driving signal;
- a driving circuit that supplies the PWM driving signal to the switching element;
- a first control path that includes an integration circuit that outputs an integration signal provided by integrating a differential voltage between the output voltage and a reference voltage, and outputs a first control signal;
- a second control path that includes an A/D converter that converts the differential voltage between the output voltage and the reference voltage into a digital signal, and includes a delay circuit that outputs a delay signal with a delay time that is changed depending on an output of the A/D converter;
- a first delay circuit that controls the delay time of the delay signal depending on the first control signal;
- and
- a PWM signal generation circuit that generates, and supplies to the driving circuit, a PWM signal with a pulse width that is adjusted depending on an output signal of the first delay circuit and a predetermined clock signal,
- wherein the integration circuit includes:
- a voltage/current converter that outputs an output current dependent on the differential voltage between the output voltage and the reference voltage;
- and
- a capacitor that is charged with the output current of the voltage/current converter.
8 more elements
Dependencies are inferred from the claim text.