TPS2549: MFi OCP test with TPS2549-Q1

Mohammed Anas

Part Number: TPS2549
Other Parts Discussed in Thread: TPS2556-Q1,

In your application report named "How to Pass MFi Overcurrent Protection Test With USB
Charger and Switch Device", It has mentioned that MFI OCP test can be passed with TPS2549.

Statement is as follows in same datasheet: "two solutions to pass the MFi OCP test based on TPS2583x/4x-Q1.
Solution 1 can also apply to other USB power switches and USB controllers, such as TPS2556-Q1,
TPS2549- Q1"

Can I get details for how to pass MFi OCP test with TPS2549?

over 1 year ago

0 Shuai Yuan over 1 year ago

TI__Intellectual 2290 points

Hi Mohammed,

Thanks for your reaching out. And I have received your question from FAE by email. I have added more details for this case and I will let FAE to update to you ASAP.

Best regards

Shuai

0 Mohammed Anas over 1 year ago in reply to Shuai Yuan

Prodigy 40 points

Hi Yuan san,

Any feedback on the same from FAE?

+1 Shuai Yuan over 1 year ago in reply to Mohammed Anas

TI__Intellectual 2290 points

Hi Mohammed,

Please refer to my below inputs,

Lower R(ILIM_HI) in use could have higher current limit, like using 14.7KOhm to have the 3.6A current limit.

TPS2549-Q1 have the cable compensation function and theoretically it will still have the voltage compensation when the current limit setting greater than 3.2A.

If we already agree to choose a higher current limit, then the additional capacitor will not be required.

Best regards

Shuai

Power management

Power management forum

TPS2549: MFi OCP test with TPS2549-Q1