Hello,
I have been unable to make the HW variant of the DRV8245 work. A partial schematic is attached below as a PNG file.
1) the unpopulated PCB ohms out per the schematic
2) the populated PCB ohms out sensibly per the schematic
3) the load connected on J9 is a 12 VDC motor that draws about 1.2 A. The following conditions are seen if the motor is connected, but also if nothing is connected to J9
4) correct voltages are seen on all the input pins
5) nFAULT is always asserted (low) regardless of the state of IN2
6) OUT1 and OUT2 voltages are both around 0.3 V
7) IPROPI is 0 V
8) ITRIP = 6.25 V whereas the data sheet gives an absolute max rating of 5.75 V.
9) The IC is cold to the touch at all times
10) R27 is now 1k0 (on nFAULT), and there is a 100 nF cap now in parallel with R25 (for IPROPI)
11) the +5 V and +12 V supplies power up at the same time
I have been unable to figure this out and am hoping that someone can offer me guidance.
Thanks,
Phillip
