Other Parts Discussed in Thread: DRV8305,
Test: verify the current and voltage sensing capabilities of DRV8305EVM
Setup: DRV8305EVM with Delfino F28379D Launchpad. Launchpad is powered by booster pack. A single phase inverter operation is implemented on a resistive load using Phase A and Phase B half-bridge legs of the Booster pack.
Problem: The current sense analog value available at ISENA and ISENB does not vary corresponding to the magnitude of current, when flowing out of the half-bridge. It is limited to the DC offset value 1.67 (instead of expected 1.65). However, analog values change corresponding to the current magnitude when it flows into the half bridge. The signals are observed on oscilloscope and also read through ADC on the launchpad.
Note: VSENA, VSENB, VSENC and Vdd voltage sensing works fine
Question: Does the driver have a configuration to limit current sensing in only one direction? Or is it a hardware failure?
Do let me know if you need any further information. I would appreciate any solution/suggestion to troubleshoot the problem.
Thanks in advance
Regards
Naveen Deepak