TPIC6A596: 100 % failed when use the IC after the PCN implementation.

Hi Nik,

Could you provide the reel picture of the ok lot and failed lot?  Also please provide test waveforms, including SRCK, RCK, SERIN, SEROUT?

Please pay attention to the picture below, especially for RCK signal.  Many thanks! 

Reel label for the failed lot is no longer available as already used up. for the test waveforms, i will get our test engineer to provide it soon.

waveform details.zip

Please refer attached waveform for good and bad .

Hi Nik，

Could you place these signals on the same screen? it's not easy to see the data transmission, additionally, what's the failure phenomenon? no SEROUT or the channel can't be controlled? please also use the waveforms to show the issue, that would be very helpful to understand the details. Many thanks!

Please refer attached report for comparison. There is discrepancy on output Voltage for pin 1, 2,11,12,13,14 as highlighted in yellow . TPIC6A595DWR troubleshooting result with waveform.xlsx

We just received another new batch . Please advise why there is change in REV . The Good one is REV C and failed is REV A.label.xlsx

Hi Nik,

Sorry for the misunderstanding, I put an example of the waveforms I want. please provide a similar picture for good and bad unit, from the attached file, the SEROUT is also different. it's important to see a valid data transmission process. Are you using the DW package? from the excel, it seems like the outputs (PIN1, PIN2, PIN11, 12,13,14) are not turned on. could you share the schematic? Thanks!

Hailee, please advise on the REV differences based on label ?

We don't have proper equipment to provide similar picture for waveform. Please refer attached schematic6403.TPIC6A595DWR troubleshooting result with waveform.xlsx

Hi Nik,

I have one small question; how did you get the value for "VALUE ON"? did you measure the Peak voltage? or just the average voltage? I'd like to understand why the SEROUT voltage was 0.16V. Additionally, please try to provide the waveforms, that would be very helpful to see what happened. Thanks!

Hi Hailee,

Measure direct pin using multimeter.0.16 is average value using multimeter. We only can provide single waveform as already provided.

Hi Nik,

Did you inverse the signal when capturing the waveforms of RCK? I'd like to know where the zero voltage is. because from the current waveform, it's supposed to be a negative voltage. Thanks!