TPS2231 / about CPPE pin pull up condition

Tsukui Yusuke

Guru 21930 points

Other Parts Discussed in Thread: TPS2231

Hi,

Could you tell me about TPS2231 terminal method.
Customer thinks about the following circuits.
Customers want to control the CPPE pin in VAUXIN=0 condition.
The pulling up to the outside is MCU.

I have got the following questions.

1.Is there the problem with this circuitry?
2.In the case of a gradual slope, is there the problem?
　(Is the pulling up resistance proper in 1MΩ?)　

Could you tell me your advice?

Best Regards,
Yusuke/Japan Disty

over 8 years ago

0 Eric Wright over 8 years ago

TI__Mastermind 42795 points

Hi,

Can you tell me if your customer query is related to the following post?

https://e2e.ti.com/support/power_management/power_interface/f/204/p/455025/1641165

If it is related, then I could ship you the EVM so you could run bench tests to see if the device behaves according to both requirements. I have one EVM and will run the bench test to see how the device works.

FYI, for older TI devices like this it is best to order the EVM and run the bench tests to see if device behavior matches the system/customer requirements.

0 Eric Wright over 8 years ago in reply to Eric Wright

TI__Mastermind 42795 points

I tried your setup on the EVM and there were no issues.

0 Tsukui Yusuke over 8 years ago in reply to Eric Wright

Guru 21930 points

Eric-san,

Thank you for your kind support and EVM test.
It is a project with another project of the URL that you have described.

Best Regards,
Yusuke/Japan Disty

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TPS2231 / about CPPE pin pull up condition