Circuit for charging a bootstrap capacitor in a voltage...

Details Circuit for charging a bootstrap capacitor in a voltage... Circuit for charging a bootstrap capacitor in a voltage...

2008-02-05

2010-06-22

Riley, Shawn (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With bootstrap circuit

C323S224000

Reexamination Certificate

active

07741901

ABSTRACT:
For charging a bootstrap capacitor in a voltage converter, a circuit is provided for wider bandwidth to eliminate the feedback stability issue and pin out for compensation circuit. A pair of transistors are connected in series between a power input and the bootstrap capacitor, the first transistor is switched synchronously with a low-side transistor of the voltage converter, and a comparator compares a feedback voltage drawn from a feedback node between the pair of transistors with a reference voltage, to control the second transistor to determine to charge the bootstrap capacitor.

REFERENCES:
patent: 6396251 (2002-05-01), Corva et al.

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