17 lines
481 B
Markdown
17 lines
481 B
Markdown
---
|
||
title: 电阻调压改数字调压
|
||
updated: 2022-05-09 01:01:19Z
|
||
created: 2022-01-08 13:18:04Z
|
||
tags:
|
||
- dcdc
|
||
---
|
||
|
||
一般可调稳压器的FB电压是恒定的,通过分压电阻的阻值比调整输出电压Vo=Vfb*(1+R1/R2)。通过接入第三个分压电阻+二极管(单向)并施以电压可实现数字调压(**下调**)
|
||
|
||
# 原理
|
||
通过加入的分支实现分流,二极管作用是限定分流方向,故压降越稳定越好、越小越好
|
||
|
||
|
||
|
||
|
||
#dcdc |