A4983 Vdd shorted to grd

Hello I was testing A4983 drivers. I was assembling the system and programming the microcontrollers while the A4983 was sitting in the cirquit with Vdd and grnd connected but motor power supply disconnected. Steppers where connected also. After power cycling the A4983 drivers began consuming a lot of current between the logic vdd and grnd. Did the fact that I ran them without motor power connected ruin them or did I do something else wrong…?


According to the A4983 datasheet, it is okay to power the logic while the motor power supply is disconnected, so you probably had a bad connection somewhere. Can you describe how everything was connected (a picture would be helpful)? Do you have the version with voltage regulators (#1202) or without (#1201)?

- Ben