US 2010/0072956 A1 · Low Power and Accurate Adapter-Current Detection Scheme for Dynamic Load Balancing

Abstract

A charger provides a charging current to an information handling system battery by measuring current provided from an external power source using a Hall sensor. The Hall sensor is integrated into an integrated circuit of the charger to measure current provided by an external power source and output a voltage proportional to the measured current. The charger analyzes the external power source current relative to an available current to determine the charging current. The Hall sensor provides the total current from the charger with minimal resistance to reduce power consumption at the charger.

Claims19

Dependent claims

An information handling system comprising:

a housing;
plural electrical components disposed in the housing and operable to process information;
a power subsystem operable to power the electrical components from an external power source or a battery disposed in the housing;
and
a charger interfaced with the power subsystem, the charger operable to determine a charging current for charging the battery from a total current provided from the external power source;
and
a Hall sensor associated with the charger, the Hall sensor operable to determine the total current provided from the external power source for use by the charger.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/236,634Filed 24 Sep 2008

Published

25 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02J 7/80
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: including monitoring or indicating arrangements
G06F 1/26
Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00: power supply means, e.g. regulation thereof
G06F 1/263
Power supply means, e.g. regulation thereof: arrangements for using multiple switchable power supplies, e.g. battery and AC
H02J 7/865
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: battery or charger load switching, e.g.…

Low Power and Accurate Adapter-Current Detection Scheme for Dynamic Load Balancing

Life of this patent

Low Power and Accurate Adapter-Current Detection Scheme for Dynamic Load Balancing

Life of this patent

Abstract

Claims19