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Part Number: TPS73201-EP
I got a feedback from customer talking about overcurrent limit of TPS73201-EP.
In the datasheet, there is a range of it, which is 250mA ~ 600mA.
You can see the waveform captured by customer, it is limited by 634mA which is over spec.
Can you explain how does it happen? It is a 5V to 3.3V design.
Thanks a lot.
Best regards, Cage.
In reply to Kyle Rakos:
What EVM specifically is the customer using? Is it for the TPS73201-EP?
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Yes, TPS73201-EP, and EVM is TPS73201DRBEVM-518.
In reply to Cage Chen:
Yes, customer replaced a TPS73201-EP on the EVM, which is TPS73201DRBEVM-518.
For your reference.
In reply to Daniel Hartung:
Yes, the current probe is very accurate, and even scope is very accurate.
After they removed output cap, the overcurrent limit is just slightly reduced from 624mA to 612mA.
Customer just needs a explanation why it is over spec.
ps, Customer also mentioned one thing, if the difference between Vin and Vout is small, the current limit will be easy to over 600mA, if it is big, the current limit will be about 580mA or smaller.
Please show the customer footnote one in the datasheet for the table.
(1) Minimum VIN = VOUT + VDO or 1.7 V, whichever is greater
Have their tests been with <1.7 V between Vout and Vin?
Yes, Vin=3.3V, Vout=3V.
So the datasheet should need to add extra test conditions in the item of output current limit.
Because in datasheet, the test conditions is only showing Vout=0.9xVout(nom).
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