Pulse width modulation fan control

Details Pulse width modulation fan control Pulse width modulation fan control

2007-05-01

2007-05-01

Ip, Paul (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S254100, C318S599000, C713S300000, C700S300000

Reexamination Certificate

active

10890308

ABSTRACT:
In one embodiment, a fan control system includes a temperature-sensing device that is adapted to sense a temperature of a component and output a temperature feedback signal, and a pulse width modulation control circuit that is configured to receive the temperature feedback signal output from the temperature-sensing device and a separate fan command signal and, relative to those signals, generate a pulse width modulation signal that is sent to a pulse width modulation controlled fan.

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Pulse-Width-Modulation Control Circuit, Apr. 1988 revised Aug. 2001, Texas INstruments, SLVS052E, pp. 1-9.

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