Step Down DC - DC with LM2576 - Githubissues

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Step Down DC - DC with LM2576 #52

Open tonilopezmr opened 4 years ago

tonilopezmr commented 4 years ago

Summary

Easy to use with few external components
3A output current
40 - 60 v, input voltage

Schematic for fixed outputs (using LM2576-5, 12...)

Screenshot 2019-12-15 at 18 55 19

Screenshot 2019-12-15 at 18 55 57

Practice

I need to step down from 24vdc to 9vdc, then if I take a 1.3K resistor as R1, applying R2 = R1 * (vout / vref - 1) then,

R2 = 1300ohm * (9v / 1.23v - 1)
R2 = 1300ohm * 6,3170731707,
R2 = 8.212 ≈ 8K resistor

References

datasheet DIY Buck Converter || How to step down DC voltage efficiently video 2596, 3A Voltage Regulator IC