Power interface circuit with control chip powered from power...

Details Power interface circuit with control chip powered from power... Power interface circuit with control chip powered from power...

H - Electricity

03

K

323/4

H03K 17/00 (2006.01) H02M 3/10 (2006.01) H03K 17/10 (2006.01) H03K 17/56 (2006.01)

Patent

CA 1263701

ABSTRACT OF THE DISCLOSURE A power interface circuit includes a low voltage control chip and a separate, high voltage power chip contained in a common package. The high voltage power chip includes a power switching semiconductor de- vice, such as a thyristor or power MOSFET, and is con- trolled under the influence of the control chip. Oper- ating power for the low voltage control chip is pro- vided from an auxiliary portion of the high voltage power chip. Such auxiliary portion comprises a voltage regulator, which derives its power from a high voltage lead in the power device. The high voltage lead may comprise a lead on which high voltage power is supplied for power switching purposes. The low voltage control chip may include a high degree of "intelligence", or logic functions, for controlling the power switching device, since the low voltage device may be a micropro- cessor or other device that can be fabricated with a high density of control elements.

530024

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