ULN2003A: EMC static test issue

Hi team,

After doing the EMC static test, the customer found that Uln2003 was damaged, the details are as follows;

1. Test method: contact discharge, ± 8Kv, 10 strokes.

   Application: 2003 driving electronic expansion valve.

   Phenomenon: One of the outputs is short-circuited to ground.

2. Customer’s question:

• What is the static level of this material?

• Have you encountered similar situations before and how did you rectify them?

      3. My analysis and answer

• The static level of this test is realated to the HBM in datasheet which is 8Kv.

• This Voltage range 8kv of the test has over the HBM (2kV) in datasheet so that the ULN2003 can’t afford.

Do I understand correctly? Could you please double-check my answer ? you can give your answer if you have any better answer.

Best Regards

Wesley Huang

wesley-huang@ti.com