LM3881: LM3881 Tadj

Chang Fei Yee1

Part Number: LM3881

Hi TI,

According to LM3881 data sheet, Cadj of 10nF will make delay between FLAG2 and FLAG1 to be about 10ms.

What's the max delay can be set?

If I put Cadj as 20nF, does it mean that the delay becomes ~ 20ms?

Thanks.

0 Howard Zou over 4 years ago

I've got the same question.

Are there any limitation on the maximum and minimum of Cadj?

0 yihe over 4 years ago in reply to Howard Zou

Hello

The capacitor timing clock is about 120ns/nF. so 10nF is about 1.2ms per clock. The delay is about 8-9 clock between each flags which is about 10ms.

For 20nF capacitor the clock period is about 2.4ms. The delay is about 8-9 clock between flags which is about 20ms-21ms.

Regards

Yihe

0 yihe over 4 years ago in reply to Howard Zou

Hello

The minimum capacitor is 200pF. The maximum is 2uF.

Regards

Yihe

0 Chang Fei Yee1 over 4 years ago in reply to yihe

ok thanks.

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