Pulse width modulation fan
AssigneeHewlett Packard Enterprise Development LP
InventorsDavid F. Heinrich, Arthur Volkmann, Rachel Pollock
Life of this patent
Estimating the term…
Abstract
An apparatus can include a fan including a control pin. The fan may receive a pulse width modulated (PWM) signal at the control pin. The fan may further control a speed of the fan based on a duty cycle of the PWM signal when the PWM signal is in a first range and, responsive to the duty cycle of the PWM signal being in a second range, transmit information corresponding to the fan to an external controller.
Claims20
An apparatus, comprising:
- a fan including a control pin, the fan to:
- receive a pulse width modulated (PWM) signal at the control pin;
- control a speed of the fan based on a duty cycle of the PWM signal when the PWM signal is in a first range;
- and
- responsive to the duty cycle of the PWM signal being in a second range, transmit information corresponding to the fan to an external controller.
An apparatus, comprising:
- a fan control component including a processing resource and operable to:
- control operation of a fan based, at least in part, on a duty cycle of a pulse width modulated (PWM) signal when the duty cycle of the PWM signal is in a first range;
- and
- request information corresponding to the fan based, at least in part, on the duty cycle of the PWM signal being in a second range.
A non-transitory machine-readable medium storing instructions executable by a processing resource to cause a computing system to:
- cause a pulse width modulated (PWM) signal corresponding to a first duty cycle range to be asserted on a control pin of a fan to control a speed of the fan;
- cause a PWM signal corresponding to a second duty cycle range to be asserted on the control pin of the fan to request information corresponding to the fan to be transferred to a controller external to the fan.
Dependencies are inferred from the claim text.