DRIVING CIRCUIT WITH OUTPUT PROTECTION AND DRIVING PROTECTION CIRCUIT APPLIED TO THE SAME
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Nov 2, 2011
filing date -
Nov 2, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A driving circuit controls a driving signal according to a control signal at a first or second logic level for driving a load. A driving protection circuit includes a driving signal detection circuit for generating a load error signal in response to that a load is abnormal; a delay judgment circuit coupled to the driving signal detection circuit for generating a first signal in response to that the load has been abnormal for a predetermined time period; and a logic control circuit coupled to the delay judgment circuit and the driving circuit for determining whether to modulate the driving signal according to the first signal. When the control signal has been at the first logic level and the load has been abnormal for the predetermined time period, the logic control signal modulates the driving signal to be a level corresponding to the control signal at the second logic level.
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