想用LM5116或者TPS40077实现一个20A的DCDC,将12V转换为5V~8V,用单片机调节输出电压。看了网上有说通过DAC加二极管和电阻接到FB脚实现,谁能详细的介绍下原理,给个参考电路,以及注意事项等。TI有没有相关的应用文档可供参考呢?
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