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Single-board power supply voltage online adjusting circuit

A technology of power supply voltage and circuit adjustment, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as poor welding, complicated operation process, time-consuming and labor-intensive, and achieve the effect of reducing complexity

Inactive Publication Date: 2018-05-25
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of adjusting the power supply of the above single board, manual welding of bias resistors is required, which is time-consuming and laborious, prone to poor welding, and the operation process is complicated

Method used

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  • Single-board power supply voltage online adjusting circuit
  • Single-board power supply voltage online adjusting circuit
  • Single-board power supply voltage online adjusting circuit

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Experimental program
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Embodiment Construction

[0022] Usually, the design of the single-board power supply of electronic equipment must have a certain margin, so as to ensure that the single-board power supply has a relatively wide output voltage range and strong stability. During the adjustment process, weld a bias resistor on the feedback (Feedback, FB) pin of the single-board power supply. By adjusting the resistance value of the bias resistor, the FB pin can obtain different feedback values, thereby making the single-board power supply output different Voltage. Specifically, you can participate in figure 1 , figure 1 It is a schematic diagram of the online adjustment circuit of the current single-board power supply voltage.

[0023] Please refer to figure 1 , In the development stage of the single-board power supply, by manually welding the bias resistors R1 and R2, the incoming line of the single-board power supply is biased and tested to verify the design margin of the single-board power supply. For example, when...

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Abstract

The invention provides a single-board power supply voltage online adjusting circuit. A first voltage division circuit is connected to a first bias resistor in parallel, a second voltage division circuit is connected to a second bias resistor in parallel, an initial output voltage of a single-board power supply is acquired through a detection chip, and finally a control chip controls the on-off state of a first switch on the first voltage division circuit and the on-off state of a second switch on the second voltage division circuit according to the initial output voltage and a preset voltage,so that the feedback value of a feedback pin of the single-board power supply changes, then the output voltage of the single-board power supply changes, and the output voltage of the single-board power supply is adjusted. In the adjusting process, the bias resistors do not need to be manually welded, and the on-off states of the first and second switches are automatically controlled through the control chip, so that the output voltage of the single-board power supply is changed changes and the complexity of adjustment of the output voltage of the single-board power supply is reduced.

Description

technical field [0001] The embodiments of the present application relate to power supply circuit technology, and in particular to an online adjustment circuit for a single-board power supply voltage. Background technique [0002] With the rapid development of computer technology and network technology, the transmission signal rate is getting higher and higher, and the requirements for the output accuracy and reliability of the single-board power supply are also getting higher and higher; at the same time, the electronic components integrated on the single-board power supply are becoming more and more Many, complex processing technology. In the development or production stage of the single-board power supply, the single-board power supply that has been strictly tested and screened by the manufacturer still has a certain defect rate. Even though some single-board power A certain percentage of failures. [0003] In the test stage of the whole electronic equipment, in order to...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/561G05F1/575G05F1/56
Inventor 彭云武彭祺张雪静
Owner CHENGDU HUAWEI TECH
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