FAN CONTROL CIRCUIT
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United States of America Patent
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Issued Date -
May 29, 2014
app pub date -
Dec 7, 2012
filing date -
Nov 26, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A control circuit controls a fan to cool an integrated baseboard management controller (iBMC) in a server. The control circuit includes a state determination module. When the server is powered off and the iBMC is operating, the system power signal from a power supply unit (PSU) of the server is at a low level, the state signal from the iBMC is at a low level signal, the fan operates. When the server and the iBMC are powered off, the system power signal from the PSU is at a low level, and the state signal from the iBMC is at a high level, the fan is powered off. When the server is operating, the system power signal from the PSU is at a high level, the fan is powered off.
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