Hi, TI expert.
The customer has applied the DRV8256ERGER and has the following defect during the test.
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1. Designed by applying 5 ICs (DRV8256ERGER) to the PCB of 1 board. (Requires driving 5 motors each) - A total of 5 sets are manufactured
2. Motor load conditions: DC24V, 1.5A or less, respectively
3. The peripheral circuit, time constant, and component arrangement of each of the 5 ICs (DRV8256ERGER) applied to one PCB are the same.
4. During operation, 2 or 3 unspecified ICs (DRV8256ERGER) do not work.
5. IC does not work with the same quantity of all 5 PCBs. (IC points are different for each)
(Example) No.1 PCB: IC3, IC4 do not work,
No.2 PCB: IC1, IC2 do not work.......
6. Phenomenon 1: Most of the non-operating ICs(DRV8256ERGER) generate a lot of heat. If you try to operate again even after cooling down, the heat will increase.
Phenomenon 2: If you put your finger on the non-heating IC among the non-operating ICs(DRV8256ERGER), the motor rotates slowly.
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Q1) Please advise on the cause and advice for the above defects.
Q2) Below is the schematic and Gerber file. Please review whether there are any problems.
Please review, and let me know if you need anything.
Thank you.
