Power supply circuit, power supply mode control circuit and control method

Abstract

The invention relates to a power supply circuit, a power supply mode control circuit and a control method. In the power supply mode control circuit, a power supply is provided with a first supply mode and a second supply mode and an electronic device has a plurality of functions; the control circuit comprises a storage module, a detection module, a calculation module and a control module, whereinthe storage module is used for storing a threshold and a power consumption parameter corresponding to each function; the detection module is used for detecting whether each function is operated or not and outputting a corresponding operation detection result; the calculation module is electrically coupled to the storage module and the detection module so as to receive the operation detection module and calculating an operation power consumption parameter according to the operation detection result; and the control module is electrically coupled to the calculation module so as to receive the operation power consumption parameter and is used for deciding to provide power in one of the first supply mode and the second supply mode for the electronic device according to the operation power consumption parameter and the threshold.

Description

【Technical field】 [0001] The present invention relates to a power supply circuit, a power supply mode control circuit and a control method, in particular to a power supply circuit capable of automatically switching pulse width and pulse frequency modulation modes, a power supply mode control circuit and a control method. 【Background technique】 [0002] With the vigorous development of electronic technology, electronic products have been widely used by people, thus making the power supply of electronic products a very important issue. At present, electronic products generally use a switching power supply mode to realize power supply. Switching power supplies generally have two modes: pulse width modulation (Pulse Width Modulation, PWM) and pulse frequency modulation (Pulse Frequency Modulation, PFM). [0003] The switching between the above-mentioned two modes of pulse width modulation and pulse frequency modulation is mostly done by calculating the power consumption of the ...

AI Technical Summary

Problems solved by technology

Since the design process of the circuit for detecting the voltage and current of the electronic device is relatively complicated, and there are many circuit components, the cost of this circuit design is relatively high

Moreover, the circuit for detecting the voltage and current of the electronic device also needs to occupy a large printed circuit board area, which cannot meet the development requirements of the miniaturization trend of modern electronic equipment.

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