RE: TPS65910 PMIC_POWER_EN signal without RTC (powering AM335x)

user4798430

Other Parts Discussed in Thread: TPS65910, TPS65910AHi Paul,
I am also met this kind of problem.
I don't think the U6A, R69, and C114 can meet this condition（ at least 1ms）.Because I see the value R69 is 1K ,C114 is 0.01uf，I calculate the RC delay is less than 1ms.

Now RTC_PWRONRSTn connect 10K Pull-up by VDDS_RTC，and also connect 0.1uf to GND in my Improved circuit. But PMIC_PWR_EN signal can not outputted High-level sometimes. Why?

over 8 years ago

0 Brian Berner over 8 years ago

TI__Mastermind 30310 points

Would it be possible for you to create a New Thread for this question and copy the link for this Thread in your post?

This thread is in the Sitara forum for the AM335x, but your new question is about the TPS65910 and will be automatically placed in the correct forum.

Thanks,
Brian

0 Brian Berner over 8 years ago

TI__Mastermind 30310 points

I split the Thread for you.

Here is a link to the original Thread:
e2e.ti.com/.../547771

0 Nastasha over 8 years ago

TI__Genius 10000 points

Hi,

Can you explain the problem you are having in this new thread? From my understanding it appears you are having issues powering up the TPS65910A device. If you could further explain the issue, I can look further into it.

Additionally, I attached some references related to the power up sequence of the device.

User Guide for TPS65910A with AM335x: http://www.ti.com/lit/ug/swcu093e/swcu093e.pdf

Power Enable Conditions:

Thanks,

Nastasha

0 user4798430 over 8 years ago in reply to Nastasha

Prodigy 100 points

I do not think my question is about of TPS65910 .Beacuse my problem is that AM335x PMIC_POWER_EN can not outputted High-level sometimes. My new thread is e2e.ti.com/.../2177131

Power management

Power management forum

RE: TPS65910 PMIC_POWER_EN signal without RTC (powering AM335x)