使用DS4402/DS4404来保证DC- DC转换器的输出电压

摘要： DS4402或DS4404可调电流DAC用于调整的DC-DC转换器的输出电压的幅度。本文介绍如何正确地选择在一个DC-DC转换器的反馈分压器网络的电阻值时， DS4402或DS4404在设计就业。

Maxim > App Notes > COMMUNICATIONS CIRCUITS OSCILLATORS/DELAY LINES/TIMERS/COUNTERS
POWER-SUPPLY CIRCUITS

Keywords: DC/DC Converter, resistive feedback divider network, current DAC, full-scale current, source May 30, 2007
current, sink current, output voltage margin

APPLICATION NOTE 4055
Using the DS4402/DS4404 to Margin the Output Voltage of a DC-DC
Converter

Abstract: A DS4402 or DS4404 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 in a DC-DC converter's feedback
divider network when a DS4402 or DS4404 is employed in the design.


The Adjustable Power Supply

The DS4402/DS4404 DACs contain two/four IC adjustable current sources capable of sinking and sourcing
curr