Part Number:DRV10987
I know this may seem like an odd question, given the datasheet. But is there any way to increase the open loop current beyond the limit in the given register settings? Some hidden register commands perhaps?
I'm asking because I'm trying to get a motor, with a very low winding resistance, to spin. And the amount of drive, the chip gives out, isn't large enough to actually get the thing going.
I can fudge the thing by incorrectly setting the motor parameters, and this gets it spinning, but obviously doesn't work beyond that as closed loop control fails.
With other motors it's absolutely fine, it's just these small ***** RC motors that are a pain. Not that I'm wanting to use it at a high power level either. I get the impression that the DRV10987 would be absolutely fine with this motor if I could increase the open loop current to get the thing started. It's parameters are otherwise encompassed by the selectable values, it just needs more of an initial kick.
I have used this motor with Instaspin/Piccolo + a DRV8301 and it works great at lower power levels and I'm sure I characterised it with far less than the max open loop current limit of the drv10987 too. It just seems that the combination of motor parameters saps the initial drive from the motor.
This leads me to my next question. The DRV10987, and the other parts in the family are great but do you have any plans to release bigger versions of them?
Something like the DRV8332 but with the integrated control set of the 10987?
Many thanks,
Matt.