PMLKBUCKEVM: Load transient current measurement using current shunt accessory board

Charles Petrin

Part Number: PMLKBUCKEVM
Other Parts Discussed in Thread: INA139

I am trying to locate two accessory boards for the Buck and LDO PMLK -- a "TI-PMLK INA139 current shunt sensing board" and a "TI-PMLK current transformer sensing board". Part numbers are unknown, but both are described in some detail in this TI Training presentation (pp.20-25)...

https://training.ti.com/sites/default/files/docs/TI-Power-Management-Lab-Kit-Series-Practical-Learning-about-Power-Supply-Design.pdf

... and recommended in these two TI Training videos as a cost-effective substitute for an expensive oscilloscope current probe:

https://training.ti.com/load-transient-current-measurement-using-current-shunt-accessory-board-ti-pmlk?context=1134169-1134188

https://training.ti.com/cost-effective-current-measurement-technique-measure-inductor-ripple-current

Is it possible to purchase either/both of these current measurement accesory boards?

Any assistance much appreciated.

over 4 years ago

0 Daniel Li14 over 4 years ago

TI__Mastermind 27030 points

I am not sure ,but you can check Ti store

Thanks

0 Charles Petrin over 4 years ago in reply to Daniel Li14

Prodigy 20 points

Thank you for your contribution, but the plain and simple answer to my question appears to be that TI neither makes nor supports the accessory boards referenced in the TI training materials I referenced. I learned this by separately contacting the author of that material, Prof. Femia, who was good enough to provide a solution. Perhaps TI should consider providing some notice along those lines to its potential PMLK customers?

0 Marshall_Beck over 4 years ago in reply to Charles Petrin

TI__Mastermind 29520 points

thank you Charles for pointing out

If you dont have access to a current probe there are few commercial options available for current sense applications. Third party sellers may have some solutions.

Shared is simple schematic. It may be a good exercise to understand current sense operation/theory by designing the circuit...just a thought. I did similar things when I was going to school at my university and it was very helpful in my understanding for test measurement operation

Sorry for the confusion.

All the best.

Marshall

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PMLKBUCKEVM: Load transient current measurement using current shunt accessory board