Sequential soft-start circuit for multiple circuit channels

Details Sequential soft-start circuit for multiple circuit channels Sequential soft-start circuit for multiple circuit channels

2007-02-20

2007-02-20

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

With starting arrangement

C363S050000, C323S901000

Reexamination Certificate

active

10907952

ABSTRACT:
A first to an n-th current sources supply a first to an n-th charging currents, respectively. A sequence control circuit allows an x-th charging current of the first to the n-th charging currents to charge a capacitor for generating an x-th soft-start signal. The variable x is an integer and satisfies an inequality of n≧x≧1. Before a y-th charging current is allowed to charge the capacitor for generating a y-th soft-start signal, the sequence control circuit stops charging the capacitor by the x-th charging current and discharges the capacitor toward a ground potential. The variable y is an integer different from the variable x and satisfies an inequality of n≧y≧1.

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“MAX1748/MAX8726 Triple-Output TFT-LCD DC-DC Converters” Maxim Integrated Products, Oct. 2004,pp. 1-16,120 San Gabriel Drive, Sunnyvale, CA 94086.

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