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Buck DC Converter

A DC converter and step-down technology, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., can solve problems such as high output ripple, unstable output voltage, and affecting load operation , to achieve the effect of precise control

Active Publication Date: 2019-09-17
ALLIS ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the output power of conventional step-down power converters has high output ripple, which makes the output voltage unstable and may affect the operation of the load connected to its rear end

Method used

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  • Buck DC Converter
  • Buck DC Converter
  • Buck DC Converter

Examples

Experimental program
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Embodiment Construction

[0042] Please refer to figure 1 , which shows a circuit diagram of the step-down DC converter according to the first embodiment of the present invention. The step-down DC converter 10 is connected between the power supply Vin and the load RL, and includes a power isolation and conversion unit (not otherwise labeled), a ripple elimination inductor 100, a power switch Q, a first inductor L1, a first rectifier The element 110 , the second rectifying element 112 , the first capacitor C1 , the second capacitor C2 and the output capacitor Co.

[0043] The power isolation and conversion unit contains multiple coils, in figure 1 Among them, the power isolation and conversion unit includes first to fourth coils W1-W4; wherein, the first coil W1 and the second coil W2 are connected in series and located on the side of the step-down DC converter 10 connected to the power supply Vin (hereinafter Called the input stage), the third coil W3 and the fourth coil W4 are connected in series an...

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Abstract

The invention discloses a voltage reduction type direct current converter which can reach zero-ripple voltage characteristic; and the zero-ripple voltage represents a ripple voltage close to be zero in engineering. The voltage reduction type direct current converter comprises a ripple elimination inductor, an electric energy isolation and conversion unit, a power switch, a first capacitor, a second capacitor, a first rectifying element, a second rectifying element and a first inductor; the electric energy isolation and conversion unit comprises multiple coils for dividing the voltage reduction type direct current converter into an input level and an output level; the power switch and the first capacitor are in the input level, wherein the first capacitor is connected to the power switch; and the second capacitor, the first rectifying element, the second rectifying element and the first inductor are in the output level, wherein the second capacitor is connected to one end of the first inductor while the other end of the first inductor is connected to the first and the second rectifying elements.

Description

technical field [0001] The present invention relates to DC converters, and in particular to buck DC converters. Background technique [0002] With the development of science and technology, there are more and more types of electronic products, such as notebook computers, mobile communication devices, multimedia players, etc. These electronic products all need to use power converters to convert high-voltage AC power or DC power into a meet-demand Low voltage and stable DC power supply as the power source for normal operation. [0003] Traditional step-down power converters are mainly composed of controllers, switching elements, diodes, energy storage inductors and capacitors. Due to their simple structure and low cost, they have been widely used as power converters for electronic products. . However, the output power of the conventional step-down power converter has high output ripple, which makes the output voltage unstable and may affect the operation of the load connecte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 潘晴财郑明杰
Owner ALLIS ELECTRIC
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