DRV8332: Urgent help needed

Hi Saurabh,

Can you provide more details?
How long do you run the motor prior to this problem appearing?
What is the motor operation profile (ex start then run in one direction continously, start run forward for 10s then stop and run in reverse direction for 10s)
If stopping and reversing directions, how are you stopping the motor?
How many devices have been damaged?
What is the PVDD voltage are you using?
Are you adhering to the requirements of section 9.2.1.2.2 Current Requirement of 12 V Power Supply?

Hi Rick,

Thanks for the quick reply...

>> How long do you run the motor prior to this problem appearing?
-- I ran the motor for not more than 5 mins in oen loop. I have a regulated power suly in which i have limited the current to least than 1 A.

>>What is the motor operation profile?
-- Right now I am running the motor in one direction continously. I have tried running the motor with both 6-step and sinusoidal commutation.

>> How many devices have been damaged?
--I have damaged 4 divices till now with the same issue in all. I have made all the connection on a bread board, I am not sure if that would cause this issue... please let me know what your opinion about that.

>> What is the PVDD voltage are you using?
--I have set the PVDD voltage to 15 v and limited the current to less than 1 A. I have also attached using thermal paste a heat sink to the IC.

>>Are you adhering to the requirements of section 9.2.1.2.2 Current Requirement of 12 V Power Supply?
-- I am using a regulated power supply to rovide GVDD and PVDD. For GVDD my power supply is can provide the required current in a situation when the device is operating at higher temeratures. So, Yes I believe I am this requirement.

I am develoing an this application for a aero grade product, cost and device footprint is of utmost importance for it. I really want to use this device as it good for both the requirement. If I am able to resolve this issue it would surely find its application for other products too. please help and suggest me how to resolve this issue


Thanks again for your support

Regards
Saurabh Agrawal

Hi Rick,

Please help for the above issue. I need to resolve this issue urgently.

For our application we will be using TMS570LC4357 for generated required PWM for the DRV8332 which will control a BLDC motor. We will be generating Sinusoidal PWM to control the motor. As a sensor feedback we are using DRV5053 linear HES. All these modules in our hardware have been tested individually and Sine PWM and Linear HES are working perfectly but we are having issues with DRV8332.

Please provide a solution/suggestion so that we can resolve this.

Thanks
Saurabh

Hi Rick,

Please reply....

Thanks
Saurabh

Hi Saurabh,

Sorry for the delayed response. Can you provide a schematic of your breadboard?
Is the damage observed in the same output?