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A Fast Response Synchronous Step-Down DC-DC Converter

A DC-DC, synchronous step-down technology, applied in the direction of high-efficiency power electronic conversion, output power conversion devices, instruments, etc., can solve the problem of large power consumption, and achieve the effect of low power consumption and fast response

Active Publication Date: 2021-05-11
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the current passes through the resistor, a part of the power consumption will be dissipated into the converter in the form of heat, so the existing step-down DC-DC converter consumes a lot of power

Method used

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  • A Fast Response Synchronous Step-Down DC-DC Converter
  • A Fast Response Synchronous Step-Down DC-DC Converter
  • A Fast Response Synchronous Step-Down DC-DC Converter

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Embodiment Construction

[0094] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.

[0095] In order to reduce the power consumption of the step-down DC-DC converter, an embodiment of the present invention provides a synchronous step-down DC-DC converter, such as figure 1 As shown, the converter can include:

[0096] A power stage step-down loop 10, an RC sampling circuit 20 connected in parallel to the power stage step-down loop, a voltage-to-current circuit 30 and a control circuit 40;

[0097] Wherein, the power stage step-down loop 10 is used to step down the input voltage of the converter to obtain the output voltage;

[0098] The RC sampling circuit 20 is used to sample the inductor current in the power stage step-down loop 10 to obtain a sampling voltage;

[0099] A voltage-to-current circuit 30, configured to convert the sampling voltage into a sampling current;

[0100]...

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Abstract

The invention discloses a fast-response synchronous step-down DC-DC converter, comprising: a power stage step-down loop, an RC sampling circuit connected in parallel to the power stage step-down loop, a voltage-to-current circuit, and a control circuit; Among them, the power stage step-down loop is used to step down the input voltage of the converter to obtain the output voltage; the RC sampling circuit is used to sample the inductor current in the power stage step-down loop to obtain the sampling voltage; The current conversion circuit is used to convert the sampling voltage into a sampling current; the control circuit is used to control the switching device in the step-down loop of the power stage to be turned on and off periodically according to the feedback voltage of the sampling voltage, sampling current and output voltage , so that the step-down loop of the power stage steps down the input voltage of the converter. The fast-response synchronous step-down DC-DC converter provided by the embodiment of the present invention has lower power consumption.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a fast-response synchronous step-down DC-DC converter. Background technique [0002] A DC-DC converter is a voltage converter that converts an input voltage into a fixed voltage, which can be divided into three categories: step-up DC-DC converter, step-down DC-DC converter, and step-down DC-DC conversion device. [0003] In related technologies, a step-down DC-DC converter usually connects a resistor in series on the step-down loop of the power stage; by detecting the voltage on the resistor, the detection of the inductor current on the step-down loop of the power stage is realized; the internal control of the converter The circuit uses the inductor current and the output voltage of the converter to control the periodic switching of the switching device inside the converter to realize step-down of the input voltage. [0004] However, since the curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/158H02M1/0009H02M1/0048Y02B70/10
Inventor 柴常春姜婵荣袁冶杨毅周伟雄江帆陈壮梁
Owner XIDIAN UNIV
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