使用 DS4424 来保证金的直流-直流转换器的输出电压

摘要： DS4424 可调节电流 DAC 用于调整直流-直流转换器的输出电压的边距。本文介绍如何正确选择的直流-直流转换器的反馈分隔线网络电阻值时 DS4424 受雇于设计。

Maxim > App Notes > DIGITAL POTENTIOMETERS

Keywords: DC-DC converter, resistive feedback divider network, current DAC, full-scale current, source Sep 22, 2008
current, sink current, output voltage margin, power supply, test margining, DC-DC converter feedback
margining

APPLICATION NOTE 4280
Using the DS4424 to Margin the Output Voltage of a DC-DC
Converter

Abstract: A DS4424 adjustable-current DAC is used to adjust the margin of a DC-DC converter's output
voltage. This article describes how to properly select the resistor values of a DC-DC converter's feedback
divider network when the DS4424 is employed in the design.


Introduction

The DS4424 adjustable-current DAC is similar to the DS4404 adjustable-current DAC with two major differences.
First, the DS4424 has 127 settings each for