Power supply system and semiconductor integrated circuit device
AssigneeRohm Co., Ltd.
InventorShingo Hashiguchi
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Abstract
A power supply system includes a plurality of semiconductor integrated circuit devices, wherein a master among the plurality of semiconductor integrated circuit devices is configured to use a constant voltage to calibrate a first reference of a detection result of a current flowing through its own switching element, and a slave among the plurality of semiconductor integrated circuit devices is configured to use the constant voltage supplied from the master to calibrate a second reference of a detection result of a current flowing through its own switching element.
Claims11
A power supply system including a plurality of semiconductor integrated circuit devices, each of which has an error amplifier configured to output an error signal corresponding to a difference between a feedback voltage, which is based on an output voltage, and a reference voltage, and is configured to control a switching element based on the error signal and a current flowing through the switching element,
- wherein a master among the plurality of semiconductor integrated circuit devices is configured to perform control based on the error signal corresponding to the difference between the feedback voltage and its own reference voltage,
- wherein a slave among the plurality of semiconductor integrated circuit devices is configured to perform control based on the error signal corresponding to the difference between the feedback voltage and the reference voltage of the master, and
- wherein during calibration, the master is further configured to use a constant voltage to calibrate a first reference of a detection result of the current flowing through its own switching element, and the slave is further configured to use the constant voltage supplied from the master to calibrate a second reference of a detection result of the current flowing through its own switching element.
A semiconductor integrated circuit device comprising:
- an error amplifier configured to output an error signal corresponding to a difference between a feedback voltage, which is based on an output voltage, and a reference voltage;
- and
- a controller configured to control a switching element based on the error signal and a current flowing through the switching element,
- wherein when operating as a master, the semiconductor integrated circuit device is configured to perform control based on the error signal corresponding to the difference between the feedback voltage and its own reference voltage, and is further configured to use, during calibration, a constant voltage to calibrate a first reference of a detection result of the current flowing through its own switching element, and
- wherein when operating as a slave, the semiconductor integrated circuit device is configured to perform control based on the error signal corresponding to the difference between the feedback voltage and the reference voltage of another semiconductor integrated circuit device, and is further configured to use, during calibration, a constant voltage supplied from the another semiconductor integrated circuit device to calibrate a second reference of a detection result of the current flowing through its own switching element.
Dependencies are inferred from the claim text.