zapta
commented
3 years ago Allegro has a +/-5A unit that should fit on the same board. Need to tell the firmware through to scale the current readings by x2. For another, non related project, I am using ACS781LLRTR-050U-T which is unidirectional and for higher currents and it works just fine.
The ACS712 you mentioned has a +/-5A version and an easier to solder package, but its bandwidth is only 80Khz, which may or may not be sufficient, need to think more about it. BTW, the analyzer samples as 100Khz.
BTW, it's also available on JLCPCB as a standard part for SMT assembly so this is also a plus https://jlcpcb.com/parts/componentSearch?isSearch=true&searchTxt=ACS712
On Fri, Apr 23, 2021 at 9:07 AM phil-barrett @.***> wrote:
Hi, cool project here. I see a number of ways this could be taken. My first question is about the sensor. It is rated for up to 2.5A. My experience is that to be really safe I need to derate. Have you played with any bidirectional sensors that work at higher currents? I see Allegro has quite a few.
Have you looked at the ACS712 https://datasheet.lcsc.com/szlcsc/Allegro-MicroSystems-LLC-ACS712ELCTR-20A-T_C10681.pdf? It claims to handle up to 20A. Does that make your readings too coarse? I suppose I should dig through the code...
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Hi, cool project here. I see a number of ways this could be taken. My first question is about the sensor. It is rated for up to 2.5A. My experience is that to be really safe I need to derate. Have you played with any bidirectional sensors that work at higher currents? I see Allegro has quite a few.
Have you looked at the ACS712? It claims to handle up to 20A. Does that make your readings too coarse? I suppose I should dig through the code...