Pulse width modulation (PWM) controlling module and method for adjusting a PWM signal thereof
AssigneeFeature Integration Technology Inc.
InventorsTseng-Wen Chen, Wen-Chi Fang, Yun-Chiang Wang, Yaw-Huei Tseng
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Abstract
A pulse width modulation (PWM) controlling module, includes: a PWM controller, a load detector, and an adjusting module. The PWM controller generates a PWM signal that is utilized for controlling a supply voltage applied to an electronic system. The load detector, coupled to the PWM controller, detects a load of the electronic system according to the PWM signal and generates a decision value accordingly. The adjusting module, coupled to the PWM controller and the load detector, controls the PWM controller to adjust the PWM signal according to the decision value.
Claims14
A pulse width modulation (PWM) controlling module comprising:
- a PWM controller for generating a PWM signal, the PWM signal being utilized for controlling a supply voltage applied to an electronic system;
- a load detector, coupled to the PWM controller, for detecting a load of the electronic system according to the PWM signal and generating a decision value accordingly;
- and
- an adjusting module, coupled to the PWM controller and the load detector, for controlling the PWM controller to adjust the PWM signal according to the decision value, the adjusting module comprising:
- a storage unit for storing a plurality of predetermined values;
- a logic circuit, coupled to the load detector and the storage unit, for comparing the decision value with a first predetermined value to generate a control signal utilized to control the PWM controller;
- and
- a reference voltage generator, coupled between the logic circuit and the PWM controller, for adjusting a reference voltage utilized by the PWM controller according to the control signal.
A method for adjusting a pulse width modulation (PWM) signal of a PWM controlling module, comprising:
- generating the PWM signal which is utilized for controlling a supply voltage applied to an electronic system;
- detecting a load of the electronic system according to the PWM signal and generating a decision value accordingly;
- adjusting the PWM signal according to the decision value by:
- setting a plurality of predetermined values;
- and
- comparing the decision value with a first predetermined value to generate a control signal utilized to control the PWM controller;
- and
- adjusting a reference voltage utilized by the PWM controller according to the control signal.
A pulse width modulation (PWM) controlling module comprising:
- a PWM controller for generating a PWM signal, the PWM signal being utilized for controlling a supply voltage applied to an electronic system;
- a load detector, coupled to the PWM controller, for detecting a load of the electronic system according to the PWM signal and generating a decision value accordingly;
- and
- an adjusting module, coupled to the PWM controller and the load detector, for controlling the PWM controller to adjust the PWM signal according to the decision value, the adjusting module comprising:
- a storage unit for storing a plurality of predetermined values;
- a logic circuit, coupled to the load detector and the storage unit, for comparing the decision value with a first predetermined value to generate a control signal utilized to control the PWM controller;
- and
- an interface controller, coupled to the storage unit, for receiving an input value and storing the input value into the storage unit as a predetermined value.
A method for adjusting a pulse width modulation (PWM) signal of a PWM controlling module, comprising:
- generating the PWM signal which is utilized for controlling a supply voltage applied to an electronic system;
- detecting a load of the electronic system according to the PWM signal and generating a decision value accordingly;
- adjusting the PWM signal according to the decision value by:
- setting a plurality of predetermined values;
- and
- comparing the decision value with a first predetermined value to generate a control signal utilized to control the PWM controller;
- and
- comparing the decision value with a second predetermined value to generate at least an alarm signal to indicate that the load of the electronic system exceeds or deceeds an allowable range.
Dependencies are inferred from the claim text.