Title:
SYSTEM AND METHOD FOR USING AN INTEGRATED CIRCUIT PIN AS BOTH A CURRENT LIMITING INPUT AND AN OPEN-DRAIN OUTPUT
Document Type and Number:
WIPO Patent Application WO/2010/117516
Kind Code:
A3
Abstract:
An integrated circuit comprises at least one pin and has at least one resistor connected between a reference voltage and the at least one pin. Current measurement circuitry applies a voltage across the at least one resistor and measures a current at the at least one pin responsive to the applied voltage in a first mode of operation. The measured current enables determination of a current limit set point for the integrated circuit. In a second mode of operation, the at least one resistor comprises a pull up resistor and the at least one pin that is connected to the at least one resistor comprises an open-drain output.
Inventors:
SHEARON WILLIAM BRANDES (US)
GOUGH LAWRENCE GILBERT (US)
GOUGH LAWRENCE GILBERT (US)
Application Number:
PCT/US2010/025911
Publication Date:
January 13, 2011
Filing Date:
March 02, 2010
Export Citation:
Assignee:
INTERSIL INC (US)
SHEARON WILLIAM BRANDES (US)
GOUGH LAWRENCE GILBERT (US)
SHEARON WILLIAM BRANDES (US)
GOUGH LAWRENCE GILBERT (US)
International Classes:
H03K19/173
Foreign References:
| JP2006170994A | 2006-06-29 | |||
| US6608744B1 | 2003-08-19 | |||
| US5508836A | 1996-04-16 |
Other References:
K LYNN ET AL.: "Universal serial bus (USB) power management", WESCON/97. CONFERENCE PROCEEDINGS, 1997, - 1997, pages 434 - 441
Attorney, Agent or Firm:
WALKER, Brian, D. et al. (L.L.P.P.O. Box 74171, Dallas TX, US)
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