Driver circuit providing controllable battery overload protection

A driver circuit (100) is utilized to drive a high current load (116) in an electronic device powered by a battery (118) having a terminal voltage which varies in relation to a level of energy being consumed. The driver circuit (100) includes a differential amplifier (110) which is responsive to a p...

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Bibliographische Detailangaben
Hauptverfasser:	GODFREY, PAUL J, PACE, GARY L, DRAPAC, GEORGE A, JACKOSKI, KEITH E
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS BASIC ELECTRONIC CIRCUITRY CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROLLING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION ORDER TELEGRAPHS PHYSICS PULSE TECHNIQUE REGULATING SIGNALLING SIGNALLING OR CALLING SYSTEMS SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	A driver circuit (100) is utilized to drive a high current load (116) in an electronic device powered by a battery (118) having a terminal voltage which varies in relation to a level of energy being consumed. The driver circuit (100) includes a differential amplifier (110) which is responsive to a predetermined reference voltage and to the terminal voltage for generating a drive control signal which proportionally reduces a current supplied to the high current load (114) when the terminal voltage is substantially equal to and lower than the predetermined reference voltage. A slope control element (112) is coupled to the differential amplifier (110) to control a rate at which the drive control signal reduces proportionally the current supplied to the high current load (116). A load control element (114), coupled to the differential amplifier (100), provides the supply of current to the high current load (116).