Other Parts Discussed in Thread: CSD95372BQ5M, , TPS53647
We have been successfully using TPS53647 4-phase buck controller with 4 pcs CSD95372BQ5M power stages in one of our product. Product is already in use, i.e. these regulators are working well. We are now building more devices, but due to component availability issues we were not able to buy CSD95372BQ5M power stages and we had to use CSD95372BQ5MC power stages instead. Now we are facing problems in production line, the regulators are not starting up properly. Visual inspection of CSD95372BQ5MC soldering looks fine, in X-Ray we didn’t see any short-circuit, and also re-soldering of the parts doesn’t help. Also we measured all the signals coming to/from power stage, but we didn’t see anything weird in them. We were able to repair this problem in one device by changing the power stages to M -version, no other changes done.
I have a couple of questions:
- We know the component package height and thermal difference, but on top of that are there any differences between M and MC version?
- Should they be directly replaceable components, i.e. we could use MC to replace M?
- In addition to mechanical/thermal, is there anything we should take into account when replacing M with MC?
- Do you know if there has been any problems in particular lot of CSD95372BQ5MC parts?
