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MAX4402ASA-T 用户编程技术手册 - Maxim Integrated（美信）
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Maxim > Design Support > Technical Documents > Application Notes > Power-Supply Circuits > APP 2767
Keywords: programmble voltage, programmable controller, dynamic voltage, core voltage
APPLICATION NOTE 2767
DAC Makes Controller Programmable
By: Jim Christensen, Strategic Applications Engineer
Oct 01, 2003
Abstract: Make the output of any power supply controller or converter programmable by adding an 8-bit
serial digital-to-analog converter (DAC) and a dual op amp.
Adjustable-voltage power supplies are used to power microprocessors, to conserve power while
maintaining performance. Long used in computers, this idea is now seeing wider application in other
microprocessor-based products.
Some specialized power-controller ICs accept a digital code and produce the corresponding output
voltage. This is effective, but often more than what is required for a particular application.
As an alternative, you can make the output of any power supply controller or converter programmable by
adding an 8-bit serial digital-to-analog converter (DAC) and a dual op amp (Figure 1).
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