Other Parts Discussed in Thread: DRV8870,
Hi
We have been using the DRV8870 device for an application to drive an LF Antenna loop very successfully.
Although we think that the DRV8870 3.6A Peak current limit has limited our emitted range, so we have been looking to use a DRV8412 device to test whether this is the case.
We have read the data sheet for the DRV8412 device and we cannot seem to find what in the DRV8870 device datasheet is called the brake/slow decay (pg 8 of DRV8870 datasheet) function. Everything else in the DRV8412 datasheet looks fine and it will do what we require.
My question is when there is no input to PWM_A, PWM_B, PWM_C or PWM_D what state does the output sit in, is it effectively a brake/slow decay condition, there is no table to show this in the DRV8412 datasheet as there is in the DRV8870 datasheet. This is important as the majority of the time the DRV8412 will be sat in this state waiting for data to arrive.
I appreciate this is a very unconventional use of the DRV8412, but we are trying to replicate some BPSK data at LF frequency so being able to reverse the current flow within the loop in important and the DRV8870 does what we want it to do.
Regards
Darren
