Power supply having means for extending the operating time of an

Details Power supply having means for extending the operating time of an Power supply having means for extending the operating time of an

1998-12-01

1999-09-07

Nguyen, Matthew

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

363 50, H02H 320, H02H 710

Patent

active

059496320

ABSTRACT:
A power supply comprising: a power source including a capacitive, nuclear or an electrochemical device for storing electrical energy; sensing circuitry for sensing when the voltage on power source is above or below a certain level; a DC-DC converter coupled to the power source switching circuitry coupled to the sensing circuitry and operable to connect the DC-DC converter to an output load and disconnect the power source from the output load when the voltage on the power source falls below a certain level and for connecting the power source to the output load and disconnecting the DC-DC converter from the output load when the voltage on the power source rises above a certain level; circuitry for activating the DC to DC Converter when the voltage on the power source falls below a certain level; and circuitry means for shutting down the DC to DC Converter when the voltage on the power source rises above a certain level.
The method for extending the operating time of a capacitive, nuclear or electrochemical power source includes the steps of: sensing when the voltage level on the power source is below or above a certain level; producing a first logic signal when the voltage on the power source falls below a certain level and producing a second logic signal when the voltage on the power source is above a certain level; providing a DC-DC converter coupled to the output of the power source; switching the connections to an output load from the power source to the DC-DC converter when the first logic signal is produced; connecting the power source to an output load and disconnecting the DC-DC converter from the output load when the second logic signal is produced; activating the DC to DC Converter when the first logic signal is produced; and shutting down the DC to DC Converter when the second logic signal is produced.

REFERENCES:
patent: 4884242 (1989-11-01), Lacy et al.
patent: 5807397 (1998-09-01), Barreras
patent: 5831351 (1998-11-01), Khosrowpour et al.

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