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High-precision low-noise power supply design method

A technology of low-noise power supply and design method, which is applied in the direction of electrical components, adjustable electric variables, instruments, etc., and can solve the problems of increasingly high requirements for power supply performance and noise

Inactive Publication Date: 2019-07-30
BEIJING T&S TECHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the power supply is also developing rapidly, it is still lagging behind the development of intelligent portable equipment. In addition, various industries have higher and higher requirements for product intelligence and integration, measurement accuracy requirements, and higher requirements for power supply performance and noise. come higher

Method used

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  • High-precision low-noise power supply design method
  • High-precision low-noise power supply design method

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Embodiment example

[0025] This embodiment provides a method for designing a high-precision and low-noise power supply. see Figure 2-4 Shown is a specific embodiment of the high-precision low-noise power supply design method in this application, including:

[0026] figure 2 The input circuit adopts different power supply circuits for different acquisition signals, such as digital signal and analog signal, digital power supply (Digital power) and analog power supply (Analog power). In addition, for each DC / DC output, the signal is fed back to the STM32Processor superior through the Measures V / I 12C BUS for management, and then the DC / DCin is controlled to form a closed loop.

[0027] image 3 For the power path management circuit, LT1377 is selected as the 28V, ±15V, +5V and +3.3V power supply chip, and the required voltage is obtained by configuring different feedback resistors; and A CT8945AQJ405 is selected as the power management chip of the ARM MCU.

[0028] Figure 4 MCU control circu...

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Abstract

The invention discloses a high-precision low-noise power supply design method. The method adopts a power supply architecture combining a DC-DC power supply and an LDO, and fully utilizes the characteristics such as high efficiency of the DC-DC power supply and low ripple noise of the LDO to realize the effective balance between the circuit efficiency and the performance. After inputting the bus power supply, an efficient DC-DC circuit can be used to convert the input voltage to a secondary voltage slightly higher than that required by the system, then the secondary voltage is converted to thepower supply as required by the system through the LDO.

Description

technical field [0001] The invention relates to battery management technology, in particular to a high-precision and low-noise power supply design method. Background technique [0002] With the development of technology, portable devices are developing towards diversification and intelligence, from the previous embedded single design to the integration of various modules, which brings new challenges to the battery's load capacity, battery life and low noise requirements. difficulty. Although the power supply is also developing rapidly, it is still lagging behind the development of intelligent portable equipment. In addition, various industries have higher and higher requirements for product intelligence and integration, measurement accuracy requirements, and higher requirements for power supply performance and noise. come higher. [0003] Therefore, on the basis of existing designs, improving power efficiency and performance is a technology that the portable industry pays ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M1/32H02M1/14
CPCH02M1/14H02M1/32H02M3/00
Inventor 邢优胜
Owner BEIJING T&S TECHNOLOGIES CO LTD
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