TLV320AIC3262 Power On Sequence

Akio Ito

Other Parts Discussed in Thread: TLV320AIC3262

Hi,

According to 'Power On Sequence' of TLV320AIC3262 Applications Reference Guide (slau309),
It seems that AVDD_18 and AVDD_33 are recommended same rise timing.
However our customer is going to make AVDD_18 power from the power supply of AVDD_33.
The delay of AVDD_18 rise time for AVDD_33 seems to be approximately 20 to 30 microseconds.
Is there any problem?

Best regards,
Akio Ito

over 9 years ago

0 Luis Fernando Rodriguez S. over 9 years ago

TI__Guru* 84915 points

Hi, Ito-san,

There shouldn't be problem if AVDD_18 has a delay from AVDD_33. Actually, the two power on sequences are suggested to separate analog from digital and speaker supplies. So, the AVDD power supplies must be powered on at the end of the sequence. AVDD_18 and AVDD_33 can be powered on in different order. I mean, AVDD_18 can be powered on before or after AVDD_33.

Best regards,
Luis Fernando Rodríguez S.

0 Akio Ito over 9 years ago in reply to Luis Fernando Rodriguez S.

Genius 3595 points

Luis-san,

Thank you for the answer.
It is lucky, they don't have to change their design of the power supply.

Best regards,
Akio ito

Audio

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TLV320AIC3262 Power On Sequence