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US 2020/0264644 A1Published application
Power supply circuit, power supply device, and motor vehicle including the same
AssigneeRohm Co., Ltd.
InventorHiroki INOUE
Life of this patent
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Abstract
A power supply circuit, includes: an N-channel depletion type output transistor connected between an input terminal of an input voltage and an output terminal of an output voltage; and an operational amplifier configured to control a gate of the output transistor so that a feedback voltage corresponding to the output voltage matches a reference voltage.
Claims8
A power supply circuit, comprising:
- an N-channel depletion type output transistor connected between an input terminal of an input voltage and an output terminal of an output voltage;
- and
- an operational amplifier configured to control a gate of the output transistor so that a feedback voltage corresponding to the output voltage matches a reference voltage.
A power supply circuit, comprising:
- an N-channel depletion type output transistor connected between an input terminal of an input voltage and an output terminal of an output voltage;
- a N-channel enhancement type first transistor including a drain connected to a gate of the output transistor, a source connected to a ground terminal, and a gate connected to a terminal to which a feedback voltage corresponding to the output voltage is applied;
- and
- an N-channel depletion type second transistor including a drain connected to the input terminal of the input voltage, and a source and a gate connected to the gate of the output transistor,
- wherein a bias voltage higher than a voltage at a source of the output transistor is applied to a back gate of the output transistor.
2 more elements
A power supply circuit, comprising:
- an N-channel depletion type output transistor connected between an input terminal of an input voltage and a terminal to which a switch voltage is applied;
- and
- a controller configured to control an on-duty of the output transistor so that an output voltage generated by rectifying and smoothing the switch voltage matches a target value.
Dependencies are inferred from the claim text.