TAS5717: Power-on/off Sequence

Arne Bohnsack

Part Number: TAS5717

Hi,

I was searching for power on/off sequencing requirements for the TAS5717 amplifier. The Datasheet seems to miss this out completely, but I found this thread which references the TAS5713M Datasheet Figure 69:

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/470168/tas5717-tas5719-power-on-off-sequence

I have the following additional questions:

Why is the Power Sequencing not in the TAS5717 Datasheet? Was it just forgotten, or is it not important for this amplifier?
What could be the consequences when PVDD ramps up before AVDD/DVDD? Could it cause a Latch-Up?
Are the chapters "10.2.1.2.4.1 Initialization Sequence" and "10.2.1.2.4.3 Shutdown Sequence" from TAS5713M Datasheet also applicable for TAS5717?

Best Regards,

Arne

10 months ago

0 Jesse Ji 10 months ago

TI__Genius 13000 points

hi Arne

1. this power sequencing is also important for tas5717. i am afraid that tas5717 missed it.

2. i think it is mainly for preventing pop happen. but if pdn is pulled up at this time, pvdd ramp up before avdd/dvdd, it might lead to unpredictable output noise. so we still strongly recommend do not let pvdd ramp up before avdd/dvdd.

3. yes, please apply the sequence for tas5717 too.

tks

jesse

0 Arne Bohnsack 10 months ago in reply to Jesse Ji

Prodigy 50 points

Ok thank you!

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TAS5717: Power-on/off Sequence