ACCUMULATED POWER CONSUMPTION SENSOR: APPLICATION IN SMART BATTERIES SYSTEMS

摘要

A device is provided for monitoring the total current discharged from a battery. The device includes a bridge circuit of resistors in which one of the resistors has a resistance which varies according to the current which has passed through it. Whenever the battery passes a current to a load, a small portion of the current is passed through the bridge circuit.

主权项

1. An electronic device, comprising:
a first power supply node; a second power supply node; and a sensor coupled between the first and second power supply nodes and configured to output a signal indicative of a total power dissipation through a load, the sensor including:
an adjustable resistor having a resistance that permanently changes as the adjustable resistor dissipates power, the adjustable resistor being configured to dissipate a first power proportional to a second power dissipated through the load, the resistance of the adjustable resistor being indicative of the total power dissipated through the load; andan output coupled to the adjustable resistor and configured to output the indication of the total power dissipation through the load.