TAS5707A: The impaIncompliant to the power sequence

na na78

Part Number: TAS5707A
Other Parts Discussed in Thread: TAS5707

Briefly, we think there is the following power sequence for TAS5707.

Power Up: AVDD/DVDD = 3.3V applied first, then PVDD=20V applied
Power Down:PVDD powered down, then AVDD/DVDD powered down

Could you please tell us what trouble would be expected if the device is not compliant to the above sequences?

I mean the following cases:
Power Up: PVDD first, then AVDD/DVDD -> It would be NG? What's happen?
Power Down:AVDD/DVDD down, then PVDD down -> It would be NG? What's happen?

I hope to hear from you.

BestRegards

over 7 years ago

0 na na78 over 7 years ago

Guru 16770 points

Hi

Do you have information?

BestRegards

0 Alex Bhandari-Young over 7 years ago in reply to na na78

TI__Mastermind 25845 points

Hi na na78,

I am looking into this and will reply shortly.

Regards,

Alex

0 Alex Bhandari-Young over 7 years ago in reply to Alex Bhandari-Young

TI__Mastermind 25845 points

Hi na na78,

In general the recommended sequence is the one in the datasheet. If the customer is unable to do this, however, there will likely be no issue in powering up PVDD first as long as /RESET and /PDN are kept low until all power supplies are stable. Likewise /RESET and /PDN should be set low before the supplies are powered down.

Regards,

Alex

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TAS5707A: The impaIncompliant to the power sequence