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5A 75W Tensão de corrente constante CC CV Buck Módulo StepDown Módulo DC 5V-35V Tensão e Ampere Dual Display US$11.54 US$11.99 View It

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BG111222821 30/11/2020

The module looks well made, well assembled but there is a problem with the actual CC CV setting. The board doesn't allow alway a constant current / constant voltage output, even when I choose an output voltage close to input value, so very small Vin=24V/Vout=23V step down ratio. For example, when certain current/voltage value is set (i.e: 23V and 1.5A), once I increase the load (variable) and the load current increases over the set current, the voltage drops always at around 8.5v. Normaly I expect the board to allow keeping the voltage and the current constant when the load varies. I had simpler cc/cv step down modules with Lm2596 and worked well, keeping the set voltages and current values. I notice that the board worked well only when I tried to charge a 5s li-ion pack at 21v and 1.8A.

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BG111222821 I've tried to edit my review to this product, because I was wrong, but I couldn't. I said that the cc/cv mode doesn't work properly, but it actually does. Actually, I was expecting to have both cc and cv modes, but that would mean that the module defeat the ohm's law, and that's imposible.

So, the module works just fine, I should have full 5 stars review. The problem was on the user end.
Resposta 06/12/2020

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