TD350E - interpreting date/batch codes and desaturation sensitivity

[SStyl.1]

I'm presently debugging an intermittent desaturation issue in a stable product platform (stable as in 10+ thousand units over more than a decade).

From what I can tell so far the TD350 device is signalling a desat on occasion without a reason I can observe (it is strangely episodic also)

I'm still working on it, but it appears that the date/batch code has changed between problematic and non-problematic setups....

Two questions

1)How do interpret the date code written on the device?

some items have KPB0909 and others MZMF909 written on them.

2) Where can I find some elaboration on the desaturation detection timing.

exactly how fast is the comparator in the TD350 that compares the incoming voltage against the internal reference at about 7V? I have reviewed both datasheet and application note?

thanks in advance.

Scott

[Cristiana SCARAMEL]

​Hello,

the intervention time of Desat comparator is about one hundred of nanoseconds (since the DESAT pin reach the threshold to when the OUT voltage starts falling).

Concerning the data code, I cannot answer.

You have to submit a formal request to your supplier.

[SStyl.1]

Hi Cristiana. we've resolved the problem now. Nothing to do with date codes (but looked that way initially)

product management may wish to elaborate on the datasheet and/or application note on the next revision cycle.