H-bridge with power switches and control in a single package

Details H-bridge with power switches and control in a single package H-bridge with power switches and control in a single package

2005-05-10

2005-05-10

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Integrated circuit

Reexamination Certificate

active

06891739

ABSTRACT:
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the IC. Shoot thru protection is provided for each leg, and a PMW soft start sequence is provided through the control of the low side MOSFETs, programed by an external, chargeable RC circuit. Input signals to the high side MOSFETs select the operation modes. Protective circuits are provided for short circuit current and over current conditions. Sleep mode and braking
on braking control is also provided.

REFERENCES:
patent: 4710686 (1987-12-01), Guzik
patent: 5245261 (1993-09-01), Ashley et al.
patent: 5313150 (1994-05-01), Arakawa et al.
patent: 5343382 (1994-08-01), Hale et al.
patent: 5502632 (1996-03-01), Warmerdam et al.
patent: 5604674 (1997-02-01), Terasawa
patent: 5666280 (1997-09-01), Janaswamy et al.
patent: 6137705 (2000-10-01), Maekawa et al.
patent: 6331794 (2001-12-01), Blanchard
patent: 6445530 (2002-09-01), Baker

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