I am using the DRV8830 based motor driver:
I have 2 motors attached to the board and am powering the board with 6V. I have soldered an additional 220mR resistor to both spare pads (R6 and R13 in the link above) in order to raise the current limit for each motor to 1A.
When I drive just one motor at its maximum voltage (i.e. sending 0b111111 in the voltage bits) I only see the voltage to the motor go to 5V at 150mA.
I have measured the supply voltage to the motor driver board and it stays constant at 6V while the motor is being driven. I always check for errors and do not see any undervoltage errors. My 6V PSU that powers the board can handle 3A output no problem.
Surely it should be much closer to 6V and a higher current? I have this micro motor connected which is specced for 6V and about 1A.
Please could someone help me understand why I cannot give 6V to my motor? Why does it cap at 5V and 150mA?