A Buck DC-DC Converter Topology

A technology of DC converter and topology structure, which is applied in the direction of DC power input conversion to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., and can solve the problem of low energy conversion efficiency

Active Publication Date: 2020-12-22
深圳市诚芯微科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this converter is that its equivalent conversion ratio is only D / 2 (D<1), the equivalent on-time of the main switches S1A and S1B is only increased to 4DT, and the energy conversion efficiency is low

Method used

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  • A Buck DC-DC Converter Topology
  • A Buck DC-DC Converter Topology
  • A Buck DC-DC Converter Topology

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Embodiment Construction

[0057] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0058] refer to image 3 , is a step-down DC-DC converter topology disclosed in the present invention, including: a freewheeling element, an energy storage element, a control element, and a load element. The load element includes a filter capacitor C0 and a load RL connected in parallel. The freewheeling element is electrically connected to the load element for providing a stable current output to the load element, including a first inductance L1, a second inductance L2 and a third inductance L3, and one end of the three is connected to the load element, the first inductance L1 , The second inductance L2 and the third inductance L3 can adopt air-core coils, ferrite coils, iron-core coils, and copper-core coils. The first inductor L1, the second inductor L2, the third inductor L3 and the filter capacitor C0 form an LC output filter network.

[0059] The ener...

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Abstract

The present invention relates to a step-down DC-DC converter topology, and relates to the technical field of step-down converters, which includes: freewheeling parts, energy storage parts, control components and load parts; freewheeling parts, electrically connected to the load parts The connection includes the first inductance, the second inductance and the third inductance, and one end of the three is connected to the load part; the energy storage part is electrically connected with the power supply terminal and the freewheeling part, including the first capacitor and the second capacitor, and the first The capacitor is connected between the first inductance and the second inductance, and the second capacitor is connected between the second inductance and the third inductance; the control assembly includes a plurality of freewheeling switches and a plurality of charging switches; the freewheeling switch, It is electrically connected with the freewheeling part; the charging switch part is electrically connected with the freewheeling part and the energy storage part. The invention has the effect of reducing the withstand voltage value of the power switch to improve the energy conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of step-down converters, in particular to a step-down DC-DC converter topology. Background technique [0002] At present, energy conversion is the basic function of the step-down DC-DC converter. Its purpose is to convert the high-voltage DC signal into a stable low-voltage DC signal with ripples to drive the load. In the application environment of large conversion ratio, the existing step-down DC-DC converter topology mainly has the following two types: [0003] see figure 1 , is a traditional Buck DC-DC converter, through a pair of switches S1, S2 and a set of LC filter circuits to realize energy-to-load conversion. In the application environment of large conversion ratio (D=Vout / Vin<0.1), the main problem of this traditional structure is that the equivalent conduction time DT (T=1 / f is the switch switching period) of the main switch S1 is too short, The energy conversion efficiency is too low. Both ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/158H02M1/0054Y02B70/10
Inventor 曹建林
Owner 深圳市诚芯微科技股份有限公司
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