A load transient response enhancement method and system for a voltage-mode buck converter

A step-down converter, load transient technology, applied to output power conversion devices, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problems of small load changes and difficulty in meeting design requirements, and achieve Fast response, improved load transient response capability, and improved accuracy problems

Active Publication Date: 2019-04-30
SANECHIPS TECH CO LTD
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Problems solved by technology

[0004] The traditional step-down converter can output a stable voltage, which can meet the application scenarios where the load changes little or relatively slowly; when the load changes rapidly or the subsequent stage has high requirements for voltage stability, the traditional structure is difficult to meet the design requirements. It is necessary to change the structure or add additional circuits to enhance the load response capability

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  • A load transient response enhancement method and system for a voltage-mode buck converter
  • A load transient response enhancement method and system for a voltage-mode buck converter
  • A load transient response enhancement method and system for a voltage-mode buck converter

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Embodiment Construction

[0047]In the embodiment of the present invention, the output voltage Vout of the voltage-mode buck converter is subjected to low-pass filtering to generate an average voltage Vout1; the difference between Vout and Vout1 is calculated, and the amplitude waveform of the obtained difference is converted. The fluctuating current Itran is obtained; the amplitude of the fluctuating current Itran is subjected to ramp processing, and the transient response output voltage Vout of the voltage-mode buck converter is generated according to the obtained ramp signal.

[0048] Here, the performing ramp processing to generate the transient response output voltage Vout of the voltage-mode buck converter includes: firstly performing ramp processing on the amplitude of the fluctuating current Itran to generate the feedback tooth voltage Vramp; then according to the feedback tooth voltage Vramp The pulse width per unit period, modulated to generate the transient response output voltage Vout of the...

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Abstract

The invention discloses a load transient response enhancement method of a voltage-mode step-down converter, comprising: low-pass filtering the output voltage Vout of the voltage-mode step-down converter to generate an average voltage Vout1; and calculating the difference between Vout and Vout1 , and convert the amplitude waveform of the calculated difference to obtain the fluctuating current Itran; perform ramp processing on the amplitude of the fluctuating current Itran, and generate the transient response output voltage Vout of the voltage-mode step-down converter according to the obtained ramp signal. The invention also simultaneously discloses a load transient response enhancing system of the voltage mode step-down converter.

Description

technical field [0001] The present invention relates to circuit electronic technology, in particular to a method and system for enhancing load transient response of a voltage mode step-down converter. Background technique [0002] With the rapid development of various electronic product markets, the power chip technology that can provide stable voltage for electronic products is also constantly improving. The loads of power supply chips are various, and the change of load size is inevitable. The load transient response time and capability have become the key technical indicators to measure the quality of power supply chips. In order to ensure the accuracy range of the output voltage of the power chip, the power chip needs to have a good load transient response capability. [0003] Buck converters are mainly used in scenarios where the input voltage is relatively high and the output voltage is relatively low. The general voltage mode buck converter is mainly composed of osc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
CPCH02M3/10H02M1/0019H02M3/156
Inventor 耿玮生
Owner SANECHIPS TECH CO LTD
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