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Low frequency ripple suppression circuit and dc/dc converter

A ripple suppression and converter technology, applied in the direction of electrical components, output power conversion devices, etc., can solve problems such as low-frequency ripple suppression, and achieve the effect of simple and effective suppression and resolution of low-frequency ripple interference

Active Publication Date: 2016-12-28
SHENZHEN ZHENHUA MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a low-frequency ripple suppression circuit and a DC / DC converter to solve the low-frequency ripple suppression problem existing in the existing DC / DC converter

Method used

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  • Low frequency ripple suppression circuit and dc/dc converter
  • Low frequency ripple suppression circuit and dc/dc converter
  • Low frequency ripple suppression circuit and dc/dc converter

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Embodiment Construction

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0013] see figure 1 , a low-frequency ripple suppression circuit provided by a preferred embodiment of the present invention is used in a DC / DC converter, the low-frequency ripple suppression circuit includes an output voltage sampling loop, and the output voltage sampling loop includes a three-terminal An adjustable shunt reference source U1, a voltage reference diode U2 is connected in series between the anode of the three-terminal adjustable shunt reference source U1 and the output ground.

[0014] In this embodiment, the output voltage sampling circuit further includes a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a third resistor R3X, a fourth resistor R4X and a LED OP1. The first capacitor C1 is connected in parallel with the f...

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Abstract

The present invention discloses a low frequency ripple suppression circuit and a DC / DC converter. The low frequency ripple suppression circuit comprises an output voltage sampling loop which comprises a three end adjustable shunting reference source, and a voltage reference diode is in series connection between the anode of the three end adjustable shunting reference source and an output ground. By the low frequency ripple suppression circuit provided by the present invention, the DC / DC converter can keep the electrical property indexes and can suppress the low frequency ripple in the output ripple simply and effectively, the low frequency ripple interference in an output ripple voltage of the DC / DC converter is solved, and the low frequency ripple suppression circuit is suitable for the circuit topology of various DC / DC converters.

Description

technical field [0001] The invention relates to the field of electronic engineering systems, in particular to a low-frequency ripple suppression circuit suitable for a DC / DC converter and a DC / DC converter. Background technique [0002] With the development of electronic engineering system miniaturization technology, more and more power supply systems begin to adopt the distributed power supply design scheme composed of DC / DC power converters to replace the traditional centralized power supply method composed of discrete components. The output ripple voltage of a DC / DC converter is one of the important indicators of its output characteristics. The size of the output ripple voltage reflects the applicability of the DC / DC converter in electronic engineering systems. [0003] The low-frequency ripple is the low-frequency part of the output ripple voltage of the DC / DC converter, which mainly comes from the power supply of the DC / DC converter and the switching transformation of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14
Inventor 万帮卫孙元鹏方先华秦杨波
Owner SHENZHEN ZHENHUA MICROELECTRONICS
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