Electrical load drive device

Details Electrical load drive device Electrical load drive device

2007-05-31

2008-12-23

Luu, An T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S109000, C327S110000, C361S078000, C323S282000

Reexamination Certificate

active

07468619

ABSTRACT:
A load drive device for driving an electrical load includes high-side and low-side transistors, and a switch. When the load is driven, each of the high-side and low-side transistors operates in a first mode where each of the high-side and low-side transistors is fully tuned on or in a second mode where each of the high-side and low-side transistors is controlled so that a load current flowing through the load is constant. When the load is driven, there is a first state where the high-side transistor operates in the second mode and the low-side transistor operates in the first mode and a second state where the high-side transistor operates in the first mode and the low-side transistor operates in the second mode. The switch switches between the first and second states to distribute heat generation between the high-side and low-side transistors.

REFERENCES:
patent: 6958592 (2005-10-01), Chapuis
patent: 2006/0087348 (2006-04-01), Ota et al.
patent: A-10-264765 (1998-10-01), None
patent: A-10-297420 (1998-11-01), None
patent: A-2005-088748 (2005-04-01), None

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