Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2005-02-15
2005-02-15
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S390000, C327S589000
Reexamination Certificate
active
06856177
ABSTRACT:
A power switching circuit comprising a power semiconductor switching device, a charge pump circuit having a control input to control whether it is on or off and a charge pump output, the charge pump output being coupled to a control terminal of the power semiconductor switching device, a bootstrap power supply for supplying power to driver circuitry for the power semiconductor switching device, the bootstrap power supply comprising a bootstrap capacitor coupled to a charging current source, the bootstrap power supply providing power to the driver circuitry when the power semiconductor switching device is being switched by the driver circuitry in a pulsed mode, and the charge pump supplying a control voltage to turn on the power semiconductor switching device and maintain it on when the power switching semiconductor device is to be maintained on continuously.
REFERENCES:
patent: 4570244 (1986-02-01), Sud et al.
patent: 4634894 (1987-01-01), Shu et al.
patent: 5359244 (1994-10-01), Hopkins
patent: 5408150 (1995-04-01), Wilcox
patent: 5946204 (1999-08-01), Wong
patent: 6169431 (2001-01-01), Xu
patent: 2180422 (1987-03-01), None
de Frutos Xavier
Lee Chik Yam
Nadd Bruno C.
Thiery Vincent
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Wells Kenneth B.
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