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12vת3.3vоƬ

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AIC1596 - 33 .LM317Ҳתõ

ôѹСĵ,Ҳ1117ջ Ȳһ1117ĵС 1117ǰ洮һL780512Vת5V,11175Vת3.3V С1117ѹС书ģ1117·ջ һǾ...

һDCDCоƬͿ˰ȷ˵MC34063PT1301οоƬֲΧĵ·׵ġ

LM2674ѹ40V LM2674ѹΪ3.3V5V12VһɵADJʱҪLM2674ִ֣ѹ

ֱÿͼѹоƬLM2576ɴﵽ3Aܻᷢȡ3.3VѹоƬܶASM1117-3.3LD1117-3.3LD1117-ADJ÷ѹȵ6V7806ɢƬٵ3.3VܷȾͺСˡ

12Vת5V12Vת3.3VĶУֻԵ1.2V11ܽŵоƬûУ6ϵоƬܽŶ˫ġ

112Vת3.3Vѹϴ󣬲ԵԴĴ󣬷ȴ󡣽ÿصԴṩѡУaLM2576-3.3bLM2674-3.3ǿѹԴƼab 2öѹ䣬ֻ䵽ѹϣɢЧһЩֱ...

װһѹ·12Vѹ3.3V. ȡ裬ֵ=12-3.3)3.3ֵȡ̫С̫ 8.7K3,3K贮8.7Kһͷ12V,һͷ3.3K3.3Kһͷӵأʱ8.7K3....

ת·ͼ R581裬LTV816SƼΪ10mAͨѹ1.2VR581СֵΪ12-1.2V/10mA=1kѡñȽϳõ4.7kΪ2.3mAR582Ϊ߼IN=12VʱOUT=3.3VIN=0VʱOUT=0V

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