SINGLE-PIN MULTIFUNCTIONAL DEVICE AND METHOD FOR INPUT AND OUTPUT IN CONTROLLING A DIRECT-CURRENT FAN
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United States of America Patent
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Issued Date -
Apr 7, 2011
app pub date -
Oct 1, 2009
filing date -
Oct 1, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A single-pin multifunctional device and method for input and output in controlling a direct-current fan use a control chip to control an operation of the fan, thereby protecting issues generated by too high a temperature. The control chip uses a value of a temperature induction unit to determine a range of protection and maintains the fan at an idle speed operation through an idle speed regulation unit. Meanwhile, the temperature induction unit notifies an over-temperature protection unit to switch from the idle speed regulation unit to the over-temperature protection unit. Therefore, the fan is controlled through a single pin to input and output simultaneously.
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