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Adaptive hysteresis control converter for enhancing transient characteristics, control method and equipment

A transient characteristic, hysteretic control technology, applied in control/regulation systems, output power conversion devices, DC power input conversion to DC power output, etc. Compensation capability, improving transient characteristics, achieving the effect of stability

Pending Publication Date: 2020-11-06
深圳市凯冠智能科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The other mainly uses an adaptive ramp generating circuit to generate a ramp signal representing the inductor current, and adopts a hysteresis mode of the upper and lower threshold voltages in a dynamic adjustment method, so that the converter can obtain good transient response characteristics, but the circuit implementation is relatively complicated. higher cost

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  • Adaptive hysteresis control converter for enhancing transient characteristics, control method and equipment
  • Adaptive hysteresis control converter for enhancing transient characteristics, control method and equipment
  • Adaptive hysteresis control converter for enhancing transient characteristics, control method and equipment

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Embodiment Construction

[0040] In order to make the purpose, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0041] It should be noted that, in any embodiment of the present invention, the Buck converter is a step-down switching converter; the MOS is a metal-oxide-semiconductor field-effect transistor; V FB is the feedback voltage; FB is the feedback node of the converter; Fs is the switching frequency of the converter; C out is the output capacitor; Resr is the equivalent internal impedance of the output capac...

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Abstract

The invention provides an adaptive hysteresis control converter for enhancing transient characteristics, a control method and equipment. The converter is used for converting input electric energy intoelectric energy with controllable voltage or current required by a load, comprises a compensation unit, an input unit, a processing unit and a comparison unit, and is characterized in that the compensation unit and the processing unit are respectively connected with the input unit and the comparison unit. Compared with the existing slope compensation technical scheme of inductive current sampling, the characteristic that the MOS tube works in a linear resistance region is utilized to substitute traditional RC resistors, different slope compensation characteristics are generated under steady-state and transient-state conditions, the stability of the converter in a steady state is realized, the linear resistance value of the MOS is changed by utilizing feedback control in a transient state,the slope compensation capability is improved, the transient characteristic of the hysteresis control converter is improved, and the hysteresis control converter is simple in circuit structure, easyin technical operation and lower in cost.

Description

technical field [0001] The application relates to the field of integrated circuits, in particular to an adaptive hysteresis control converter, a control method and a device for enhancing transient characteristics. Background technique [0002] Buck converters (step-down switching converters) are widely used in voltage control mode, peak current control mode and hysteresis control mode. Compared with the voltage control mode and peak current control mode, the hysteresis control mode does not require a compensation network and an error amplifier, the loop structure is simple and self-oscillated, and the transient response speed is fast and the power consumption is low, so it is widely used. . [0003] The converter in the hysteretic control mode needs to sample the output ripple for feedback control. Under the development trend of ultra-low feedback reference voltage, it is more and more difficult for the hysteretic control mode to achieve better transient characteristics. Th...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/158H02M3/1566
Inventor 孙凯周小虎
Owner 深圳市凯冠智能科技有限公司
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