Diagnostic and maintenance systems and methods for LED power management integrated circuits,申请号US20060535047-传众专利搜索

Diagnostic and maintenance systems and methods for LED power management integrated circuits

申请公布号：US7606679(B1)

申请号：US20060535047

申请日期：2006.09.25

申请公布日期：2009.10.20

申请人：

SEMICONDUCTOR COMPONENTS INDUSTRIES, L.L.C.

发明人：VOICU GELU;GAGEA LEONARD;RUSSELL ANTHONY

分类号：G06F11/30

主分类号：G06F11/30

摘要：According to some embodiments, a light emitting diode (LED) power management and diagnostics history recording integrated circuit includes a power management circuit controlling a supply of power to the LED, a diagnostics detection circuit recording a diagnostics history for the LED, a non-volatile diagnostics history memory storing the diagnostics history; and an external interface for transferring externally the diagnostics history stored in the non-volatile diagnostics history memory. The diagnostics history includes diagnostics data for at least two sequential occurrences of a reoccurring fault condition. The diagnostics data may include temperature, under-voltage, over-voltage, open-circuit load, and short-circuit load indicators, among others. A diagnostics analysis system downloads the diagnostics data after a given operation period and performs maintenance decisions according to the diagnostics data. Such systems are particularly useful for diagnosing intermittent faults and/or faults in remotely-located systems, and making maintenance decisions accordingly.