Hi Guys, first post to the forum here.
I'm having a strange issue using an Intersil HIP4081A H bridge driver IC. I have it hooked up to an Arduino MCU for logic commands and 4 power MOSFETS used to a drive a DC 12V motor. Strange thing is, the circuit works as expected on an Agilent E3631A Power Supply, but not with any of multiple 12V lead Acid Batteries. It also doesn't work with Agilent E3632A. With the "bad" sources the IC just heats up and draws ~.5A. When it works it only draws about .017A which is lighting a "bridge ok" directional indicator LED (in parallel with motor). The same problem occurs whether or not I hook up a motor.
My thought here is that this has something to do with the internal resistance of my power supplies. But WHY would this cause the IC to malfunction? What can I do to prevent this seemingly latching condition inside the IC? Has anyone seen this before?
I've tried multiple decoupling caps at the battery terminals as well as close to the IC. I tried current limiting with the "bad" PS and it just causes the voltage to drop at the input.
Any help would be appreciated.
I'm having a strange issue using an Intersil HIP4081A H bridge driver IC. I have it hooked up to an Arduino MCU for logic commands and 4 power MOSFETS used to a drive a DC 12V motor. Strange thing is, the circuit works as expected on an Agilent E3631A Power Supply, but not with any of multiple 12V lead Acid Batteries. It also doesn't work with Agilent E3632A. With the "bad" sources the IC just heats up and draws ~.5A. When it works it only draws about .017A which is lighting a "bridge ok" directional indicator LED (in parallel with motor). The same problem occurs whether or not I hook up a motor.
My thought here is that this has something to do with the internal resistance of my power supplies. But WHY would this cause the IC to malfunction? What can I do to prevent this seemingly latching condition inside the IC? Has anyone seen this before?
I've tried multiple decoupling caps at the battery terminals as well as close to the IC. I tried current limiting with the "bad" PS and it just causes the voltage to drop at the input.
Any help would be appreciated.