TPS2549: apple device charging, MFI R31 OCP requirement

Anderson Cheng

Intellectual 990 points

Part Number: TPS2549
Other Parts Discussed in Thread: TPS2546,

Hi Experts,

right now customer need to pass the MFI R31 OCP test on their headunit product,

in their current design they used TPS2546, but it can not pass the test.

Question:

1. does the TPS2549 can pass this test?

2. if not, please help to promote a new device can pass the certification test.

Thanks,

Anderson

over 1 year ago

0 Anderson Cheng over 1 year ago

TI__Intellectual 990 points

BTW, it's a USB-C port, so customer said it need to output 5V/3A.

0 Christopher Lim1 over 1 year ago in reply to Anderson Cheng

TI__Mastermind 20720 points

Hi Anderson,

Could you provide more information about the MFI R31 OCP test?

I'll need to check with a team member and will get back to you about your questions this week.

Thanks,

Chris

0 Anderson Cheng over 1 year ago in reply to Christopher Lim1

TI__Intellectual 990 points

Hi Chris,

I can't find customer said the R31, but found this:

https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf

in chapter 24.7

0 Christopher Lim1 over 1 year ago in reply to Anderson Cheng

TI__Mastermind 20720 points

Hi Anderson,

Let me check with the team internally and i'll get back to you by end of week.

Thanks and Regards,

Chris

0 Anderson Cheng over 1 year ago in reply to Christopher Lim1

TI__Intellectual 990 points

Hi Chris,

any feedback on this?

I have found one document , which mentioned TPS2549 can pass MFI by solution 1 but still not very clear, hope you can provide detail solution for customer.

https://www.ti.com.cn/cn/lit/pdf/slvaeb8?keyMatch=MFI

Thanks.

Anderson

0 Chuck Branch over 1 year ago in reply to Anderson Cheng

TI__Mastermind 26850 points

Anderson,

I do not believe that the TPS2549 will be able to pass the MFI specification. I believe that the TPS2583x-Q1 parts were specifically designed with the specification in mind, but the TPS2549 was released before the specification was released and cannot be retrofit to pass.

Regards,

Chuck

Power management

Power management forum

TPS2549: apple device charging, MFI R31 OCP requirement