Power source monitoring arrangement and method having low power

Details Power source monitoring arrangement and method having low power Power source monitoring arrangement and method having low power

1997-12-12

1999-05-25

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

External or operator controlled

Using a three or more terminal semiconductive device as the...

320136, H02J 700

Patent

active

059072385

ABSTRACT:
An electronic circuit and system (1) incorporating a battery system (30), power-discharge sensing circuitry (40) and sleep circuitry (10) all in electrical communication with each other. The sleep circuitry (10) detects the presence or absence of an external load on the battery system (30) by sensing changes in voltage across the battery's protection diode (D3). When no external load is present, the sleep circuitry (10) controls the power-discharge sensing circuitry (40) in an extremely low current mode (e.g., current is consumed by sleep circuitry (10), but no power supplied to power-discharge sensing circuitry (40)). This mode is also referred to as a sleep mode. Upon detection of a small voltage drop on the battery's protection diode (D3) caused by a power-consuming load on the battery, the sleep circuitry (10) supplies power to the power-discharge sensing circuitry (40). When the power-discharge sensing circuitry (40) is thus activated, the amount of power removed from the battery system (30) can then be monitored. When the load is removed, the power-discharge sensing circuitry (40) is again placed into the sleep mode.

REFERENCES:
patent: 5372898 (1994-12-01), Atwater et al.
patent: 5487956 (1996-01-01), Bromley et al.
patent: 5631540 (1997-05-01), Nguyen
patent: 5646503 (1997-07-01), Stockstad
patent: 5692203 (1997-11-01), Grodevant

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