Controlling multiple facets of duty cycle response using a single motor integrated circuit pin
AssigneeSemiconductor Components Industries, LLC
InventorsTakashi OGAWA, Fumio KUMAZAWA
Life of this patent
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Abstract
A system, in some embodiments, includes: a motor; and control logic, coupled to the motor, to determine a duty keep status and a duty cycle threshold based on a received voltage, wherein the duty keep status indicates whether the system is to operate in a duty keep mode or a stop mode, wherein the duty cycle threshold indicates a minimum duty cycle for the motor if the system operates in said duty keep mode and indicates an input duty cycle threshold below which the control logic shuts off the motor if the system operates in the stop mode.
Claims20
A system for controlling a motor, the system comprising:
- a motor driver coupled to an output of a motor integrated circuit (IC), the motor IC comprising:
- a control logic configured to receive a voltage signal;
- a pulse-width-modulation (PWM) logic coupled with the control logic, the control logic configured to receive a PWM input signal;
- and
- a motor controller coupled to an output of the control logic;
- wherein the control logic is configured to generate a keep status and a duty cycle threshold based upon the voltage signal;
- and
- wherein the keep status comprises one of a keep mode or a stop mode.
A motor integrated circuit comprising:
- a control logic configured to receive a voltage signal;
- and
- a pulse-width-modulation (PWM) logic coupled to the control logic, the control logic configured to receive a PWM input signal from the PWM logic;
- wherein the control logic is configured to generate a keep status and a duty cycle threshold based upon the voltage signal, the keep status comprising one of a stop mode or a keep mode;
- and
- wherein the control logic is configured to send a stop signal to a motor controller if the control logic generates the stop mode and if the PWM input signal is less than the duty cycle threshold.
A method of controlling a motor, the method comprising:
- receiving, at a control logic, a voltage signal, the control logic comprising a set of voltage values and a set of duty cycle values;
- calculating, using the control logic, a keep status and a duty cycle threshold based on the voltage signal, the set of voltage values, and the set of duty cycle values, wherein the keep status comprises one of a keep mode or a stop mode;
- receiving, at the control logic, a pulse-width-modulation (PWM) input signal from a PWM logic;
- and
- sending one of a stop signal or an output signal to a motor controller indicating that a motor is to continue rotating.
Dependencies are inferred from the claim text.