Circuit to optimize charging of bootstrap capacitor with...

Details Circuit to optimize charging of bootstrap capacitor with... Circuit to optimize charging of bootstrap capacitor with...

2007-04-05

2008-11-25

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S092000, C327S390000

Reexamination Certificate

active

07456658

ABSTRACT:
A circuit for optimizing charging of a bootstrap capacitor connected to a high side floating supply voltage at a first terminal and to a switched node voltage at a second terminal, the circuit for optimizing being included in a gate driver circuit having a high-and a low-side driver circuits for driving high- and low-side switches connected at a switched node in a half bridge to provide current to a load, the high-side driver circuit receiving a first control voltage referenced to a first level and a low-side driver circuit receiving a second control voltage referenced to a second level, the bootstrap capacitor providing supply voltage for the high-side driver circuit. The optimizing circuit includes a first switch connected to the first terminal of the bootstrap capacitor; and a phase sense comparator for sensing the voltage at the switched node and turning ON the first switch when the voltage at the switched node is LOW, whereby charging of the bootstrap capacitor is optimized when the phase sense comparator is enabled.

REFERENCES:
patent: 5138200 (1992-08-01), Barsanti et al.
patent: 5369319 (1994-11-01), Good et al.
patent: 5373435 (1994-12-01), Jayaraman et al.
patent: 5502632 (1996-03-01), Warmerdam et al.
patent: 5883547 (1999-03-01), Diazzi et al.
patent: 7215189 (2007-05-01), Wilhelm
patent: 2005/0052168 (2005-03-01), Tazawa et al.
patent: 2005/0102128 (2005-05-01), Wilhelm
patent: 2006/0044051 (2006-03-01), Locatelli

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