LM3881: how about the flags states when the VCC lost power

Hello

If VCC is below 2.7V, the device's behaviors are undecidable if the EN signal is HIGH

Regards

Yihe  

hi Yihe

as below figure,Red circle

,when the EN is high,Flag1 is High ,Flag2 & Flag3 Is low,if the power loss in this moment, may i know the power sequence?

,when the EN is Low,Flag3 is Low ,Flag2 & Flag3 Is high,if the power loss in this moment, may i know the power sequence?

we need to consider the any power sequence in the power loss during power up/down

thanks

Hello

The recommended operation range is 2.7V to 5.5V. Application has to ensure that these recommended operation range is met. The behaviors of the devices outside the recommended operation range is unpredictable.

Regards

Yihe 

hi sir

do you have any solution to avoid the conditiion happen?

thanks

Hello

Hold-up capacitor to hold the voltage so that device have enough time to finish.

flip the EN signal as early as possible when the VCC starts ramp down

Regards

Yihe