Multiple power supply system
AssigneeKabushiki Kaisha Toshiba
InventorKazuo Imanishi
Life of this patent
Estimating the term…
Abstract
Among a plurality of power supply circuits arranged in a power supply monolithic integrated circuit, output voltages of power supply circuits except for an external microcomputer power supply circuit are monitored by a protective circuit. When an abnormal output appears at least one of the power supply circuits, the outputs of all the power supply circuits except for the microcomputer power supply circuit are cut off.
Claims10
A power supply monolithic integrated circuit controlled by a microcomputer external to said monolithic integrated circuit, comprising:
- a microcomputer power supply for supplying power to said external microcomputer;
- power supplies other than said microcomputer power supply;
- decoding means for decoding signals from said external microcomputer and outputting power supply control signals to said power supplies other than said microcomputer power supply;
- and
- first protective circuit means for detecting a first abnormality in any one of said power supplies other than said microcomputer power supply, and for controlling said power supplies other than said microcomputer power supply to an OFF state independently of an ON/OFF state of said microcomputer power supply in response to the detected first abnormality.
A power supply circuit controlled by a microcomputer external to said power circuit, comprising:
- a microcomputer power supply for supplying power to said external microcomputer;
- power supplies other than said microcomputer power supply;
- decoding means for decoding signals from said external microcomputer and outputting power supply control signals to said power supplies other than said microcomputer power supply;
- and
- first protective circuit means for detecting a first abnormality in any one of said power supplies other than said microcomputer power supply, and for controlling said power supplies other than said microcomputer power supply to an OFF state independently of an ON/OFF state of said microcomputer power supply in response to the detected first abnormality.
A power supply circuit for supplying power to a plurality of external components and which is controlled by a microcomputer external to said power supply circuit, comprising:
- a microcomputer power supply for supplying power to said external microcomputer;
- component power supplies respectively coupled to said plurality of external components;
- decoding means for decoding signals from said external microcomputer and outputting power supply control signals for selectively controlling said component power supplies;
- and
- first protective circuit means for detecting a first abnormality in any one of said component power supplies, and for controlling said component power supplies to an OFF state independently of the ON/OFF state of said microcomputer power supply in response to the detected first abnormality.
Dependencies are inferred from the claim text.