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Programmable voltage stabilizer based on digital potentiometer

A technology of digital potentiometer and voltage stabilizer, which is applied in the direction of instruments, adjusting electric variables, control/regulation systems, etc., and can solve the problems of low adjustment accuracy and inconvenient use

Inactive Publication Date: 2012-05-16
许文昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Both the adjustable linear regulator and the switching regulator change the output voltage by manually adjusting the resistance value, which not only has low adjustment accuracy, but also is not convenient to use.

Method used

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  • Programmable voltage stabilizer based on digital potentiometer
  • Programmable voltage stabilizer based on digital potentiometer

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Embodiment Construction

[0008] The invention includes a digital potentiometer and a three-terminal adjustable linear voltage regulator, and the digital potentiometer is connected in series between R1 and R2.

[0009] In the field of industrial control, it is necessary to provide a high-efficiency, low-voltage output digitally controlled linear regulated power supply that can be precisely adjusted in a small range. Using a low dropout regulator (Low Dropout Regulator, LD0) can greatly improve power conversion efficiency. To save power, DS1809 is a push-button 64-tap non-volatile digital potentiometer.

[0010] The input terminal of the voltage regulator is connected to a 6V battery, the output voltage Uo=+5-5.5V, and the adjustment range is 0.5V. 0.5V is divided into 64 parts by DS1809, with a step of 7.8mV; the total resistance value of DS1809 has three specifications of 10kΩ, 50kΩ and 100kΩ for selection, R1 and R2 are voltage dividing resistors, and they are related to the output resistance of DS18...

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PUM

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Abstract

The invention discloses a programmable voltage stabilizer based on a digital potentiometer, relating to a three-end adjustable linear voltage stabilizer. The invention provides a programmable voltage stabilizer based on digital potentiometer, which is flexible in use and high in regulation precision. In order to achieve the purpose, the invention adopts the following technical scheme: the programmable voltage stabilizer comprises a digital potentiometer and the three-end adjustable linear voltage stabilizer. The programmable voltage stabilizer is structurally characterized in that the digital potentiometer is serially connected between a resistor R1 and a resistor R2.

Description

Technical field: [0001] The invention relates to a three-terminal adjustable linear voltage regulator, in particular to a programmable voltage regulator based on a digital potentiometer. Background technique: [0002] Both the adjustable linear regulator and the switching regulator change the output voltage by manually adjusting the resistance value, which not only has low adjustment accuracy, but also is not convenient to use. Invention content: [0003] The present invention aims at the above problems and provides a digital potentiometer-based programmable voltage regulator with flexible use and high adjustment precision. [0004] In order to achieve the above purpose, the present invention adopts the following technical solutions. The present invention includes a digital potentiometer and a three-terminal adjustable linear voltage regulator. The key point of the structure is that the digital potentiometer is connected in series between R1 and R2. [0005] Beneficial ef...

Claims

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Application Information

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IPC IPC(8): G05F1/12
Inventor 许文昊
Owner 许文昊
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