LM3881: About the pull-up resistor of LM3881

Satoshi Okamoto

Intellectual 430 points

Part Number: LM3881

Hi There,

We are considering the adoption of "LM3881MME/NOPB".

The reference circuit is pulled up with 100kΩ.
(Figure 18. Typical Application Circuit)

There is no description of the output current(IOL) for the FLAG*.
Is it possible I want to pull up with 10kΩ?

Best regards

- satoshi

over 3 years ago

0 yihe over 3 years ago

TI__Guru 58060 points

The typical Rdson fort the FLAG output is 125ohm, The max Vol of the FLAG is 400mv. The Max current of the Flag is 1.2mA.The pull up resistor shall meet all these requirement.

Regards

Yihe

0 Satoshi Okamoto over 3 years ago in reply to yihe

Intellectual 430 points

Hi There,

Thank you for your answer.

I pull up with a 5V power supply.
Therefore, it was confirmed that there is no problem even with 10 kΩ.

Best regards
- satoshi

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LM3881: About the pull-up resistor of LM3881