Dean F Henderson

Address:

5421 Fortunes Rdg Dr, Durham, NC 27713

VIN:

WAUDF78E17A096358

Make:

AUDI

Model:

A4

Year:

2007

US Patent:

7489109, Feb 10, 2009

Filed:

Aug 11, 2004

Appl. No.:

10/915800

Inventors:

Jinrong Qian - Plano TX, US
Donald P. Folkes - Flower Mound TX, US
Dean F. Henderson - Durham NC, US

Assignee:

Intersil Americas Inc. - Milpitas CA

International Classification:

H02J 7/00
H02J 7/04

US Classification:

320135, 125137, 125140, 125160

Abstract:

An integrated regulator and charging system including a DC/DC converter, a P-channel device, a battery system and a system/charger controller. The DC/DC converter converts an input voltage to a regulated voltage on a system bus. The battery system includes a rechargeable battery and a current sense device coupled in series between the drain of the P-channel device and ground, where the source of the P-channel device is coupled to the system bus. The system charger/controller regulates the system bus at a minimum voltage level when the battery voltage is below the minimum voltage level, such as a deeply discharged battery. The system charger/controller also regulates charge current through the battery when its voltage is between the minimum voltage level and a maximum voltage level and regulates the system bus at the maximum voltage level when the battery voltage is at the maximum voltage level.