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Low ripple power supply for high precision data acquisition system

A data acquisition system and low ripple technology, applied in the power supply field, can solve the problem of large output voltage difference, and achieve the effect of good dynamic performance, low ripple index and high efficiency voltage conversion

Inactive Publication Date: 2015-05-27
哈尔滨功成科技创业投资有限公司
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  • Application Information

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Problems solved by technology

If the input and output voltage difference is large, the efficiency of the linear regulator is intolerable

Method used

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  • Low ripple power supply for high precision data acquisition system

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Embodiment Construction

[0014] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0015] A low-ripple power supply for a high-precision data acquisition system, which consists of a switching power supply and a linear power supply. The LM25576 switching voltage regulator chip from Texas Instruments TI and the LT3083 and LT3015 low-dropout linear voltage regulator chips from Linear Technology were selected. low ripple power system.

[0016] It is characterized in that the printed circuit board of the power supply system adopts a four-layer board design.

[0017] combine figure 1 , figure 1 is the structure diagram of the system. The switching regulator part adopts the LM25576 step-down switching regulator of Texas Instruments. The LM25576 is an easy-to-use buck regulator with an input voltage range of 6-42V. Output 3A of continuous current through the internal integrated 170mΩ N-channel MOSFET. The operating frequency is adjustable from 50k...

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Abstract

The invention discloses a low ripple power supply for a high precision data acquisition system. The low ripple power supply needed by the high precision data acquisition system has the advantages of low ripple and noise. The low ripple power supply needed by the high precision data acquisition system is researched and designed. After the work principles of a switch voltage stabilization power supply and a linear voltage stabilization power supply are analyzed, the switch power supply and the linear power supply are in two-level series connection to reduce ripples. An LM25576 switch voltage stabilization chip of the TI (Texas Instruments) and LT3083 and LT3015 low dropout voltage linear voltage stabilization chips of the Linear Technology Corporation are selected to design a low ripple power supply system.

Description

technical field [0001] The invention relates to a power supply, in particular to a low-ripple power supply applied to a high-precision data acquisition system. Background technique [0002] Analog signal acquisition is the process of quantifying the electrical signal status of various sensors or monitored objects, and organizing them in a data format that is convenient for recording and analysis. Signal acquisition is an indispensable important equipment in the fields of automatic operation, safety assurance, equipment reliability monitoring and other fields in aviation, aerospace, navigation, industrial automation, environmental engineering, transportation, energy and other industries. With the improvement of automation and reliability requirements, the development of sensor technology, and the improvement of signal processing and analysis capabilities, the requirements for the accuracy of collected data also increase. In the aviation and marine industries, the requirement...

Claims

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Application Information

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IPC IPC(8): H02M3/10
Inventor 白璐程美新
Owner 哈尔滨功成科技创业投资有限公司
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