A non-uniform oversampling digital controller and its control method

A technology of digital controllers and control methods, applied in the direction of electric controllers, controllers with specific characteristics, etc., can solve problems such as large overshoot or undershoot voltage, achieve short conversion time, high precision, and eliminate delay problems Effect

CN109188896BActive Publication Date: 2019-08-09SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-08-09

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Abstract

The invention relates to a non-uniform oversampling digital controller and a control method thereof, and belongs to the technical field of electronic circuits. The non-uniform oversampling digital controller comprises a proportion-integration-differential compensator and a non-uniform oversampling ADC changing resolution and conducting sampling and quantization based on input signal. The non-uniform oversampling ADC is provided with a first input end used for output connection with switching converter topology and a second input used for connection with reference signals. The output end of thenon-uniform oversampling ADC is connected with the input end of the proportion-integration-differential compensator. The proportion-integration-differential compensator is provided with an output end. The invention further discloses the control method of the non-uniform oversampling digital controller. The non-uniform oversampling digital controller and control method thereof have the advantagesthat the structure is simple, the switching time is short, accuracy is high, and stability is high.
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Description

technical field

[0001] The present invention relates to the technical field of electronic circuits, and more specifically relates to a non-uniform oversampling digital controller and a control method thereof. Background technique

[0002] The switching converter chip is one of the most widely used power management chips in electronic products, and its performance is related to the reliability and stability of electronic products. Compared with the traditional analog control technology, the digital control DC-DC converter has received more and more attention and research because of its simple structure, low power consumption, strong anti-interference ability and good system compatibility. The increase in the operating frequency of the DC-DC converter can effectively reduce the area of ​​the inductor and capacitor, and is suitable for highly integrated portable devices. In addition, it can effectively reduce the output voltage ripple and improve the load transient response per...

Examples

Embodiment

[0036] Such as Figure 1 to Figure 4 As shown, a kind of non-uniform over-sampling digital controller of the present invention includes a proportional-integral-differential compensator 102 and a non-uniform over-sampling ADC101 that performs sampling and quantization by changing the resolution according to the input signal, and the non-uniform over-sampling ADC 101 is designed There is a first input for connection to the output of the switching converter topology and a second input for connection to the reference signal, the output of the non-uniform oversampling ADC 101 is connected to the input of a proportional-integral-derivative compensator 102 , the proportional-integral-derivative compensator 102 is provided with an output terminal.

[0037] The non-uniform oversampling ADC 101 comprises an oversampling ADC 201, a subtractor 202, a digital filter 203, a comparator 204 and a data selector 205, the oversampling ADC 201 being provided with a first input for connection with...