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Voltage ripple control circuit and control method

A voltage ripple and control circuit technology, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, can solve the problem of low stability of output voltage and achieve the effect of improving dynamic performance

Active Publication Date: 2021-05-14
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a voltage ripple control circuit and control method to solve the existing problem of low output voltage stability during load jumps

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  • Voltage ripple control circuit and control method
  • Voltage ripple control circuit and control method
  • Voltage ripple control circuit and control method

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Embodiment Construction

[0041]The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0042] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0043] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another elemen...

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Abstract

The invention discloses a voltage ripple control circuit and a control method. A ripple signal is obtained by superimposing a compensation voltage and a first ripple voltage on a feedback voltage; and a reference signal is obtained by superimposing a bias voltage on a reference voltage. Compare to get the turn-on signal. The compensation voltage realizes the leveling of the wave bottom of the ripple signal, which can realize that the feedback voltage and the reference voltage are equal under any duty cycle or any output. Since the error correction loop can be removed, the dynamic performance will be improved when the output load jumps. There will be a big improvement.

Description

technical field [0001] The invention relates to a power electronic technology, more specifically, to a voltage ripple control circuit and a control method. Background technique [0002] Among the control schemes of buck converters, the scheme based on constant on-time voltage ripple control has become the preferred control scheme for high-current buck converters in recent years due to its smaller light-load output ripple and superior dynamic performance. . In this scheme, the voltage ripple of the virtual inductor current is superimposed on the feedback voltage and acts on the negative terminal of the error comparator. When the superimposed signal is lower than the reference voltage of the positive terminal of the error comparator, the error comparator is flipped high, Then control the inversion of the PWM trigger to generate the turn-on signal of the upper tube. The upper tube is turned on for a fixed on-time and then turned off. Then, the lower tube is turned on until the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/157
CPCH02M3/157H02M3/158H02M1/143H02M1/15H02M3/156H02M1/0025
Inventor 李国旺
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD