Power supply device and electric circuit
AssigneeSanyo Electric Co., Ltd.
InventorTakashi Kabasawa
Life of this patent
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Abstract
An FET for malfunction check is connected between the gate and source of an FET for power-source output control, which is connected in series in a power output line from a battery used as a power source for a load. A malfunction determination circuit determines whether the FET for power-source output control is operating normally or not, by monitoring output voltage of the FET for malfunction check. Further, the malfunction determination circuit identifies malfunction of the FET for power-source output control due to short-circuiting during actual use.
Claims6
A power supply device used as a power source for a load, comprising:
- an FET for power-source output control connected in series in a power output line,
- an FET for malfunction check connected between the gate and source of the FET for power-source output control, and
- a malfunction determination circuit for determining whether the FET for power-source output control is operating normally or not, by monitoring output voltage of the FET for malfunction check.
An electric circuit, comprising
- an FET for output control connected in series in an output line along which power or a signal is supplied, and
- an FET for malfunction check connected between the gate and source of the FET for output control.
Dependencies are inferred from the claim text.