Hello,
I want to use the DRV8835 to drive one DC motor. The DRV is controlled by a µcontroller (pic32mz). When I just check the outputs of the DRV without motor connected, the output timing seems correct, so if "on" 10V on the output, if "off" 0V on the output. But when I connect the motor (without load), I guess not enough current is supplied, because the output voltage only rises to 5V when "on". And when I connect load to the motor, nothing at all happens. And with motor connected, I see spikes on the voltage of about 2-4V. Monitoring the power voltage of 5V and 10V while the motor is connected does not show anything weird.
I attach the connection diagram of the driver on my board. The voltage V_Motor is supplied by a LM317D, which is able to supply 1,5A like the DRV8835.
Using a UDN2916 instead of DRV8835 with same conditions, makes my motor work the expected way.
I hope someone can help here or suggest anything. If you need further information, let me know.
Thanks, regards.