TAS6584-Q1: I2C address changes after SW RESET

? ?

Part Number: TAS6584-Q1

Tool/software:

Dear Colleagues,

In our amplifier product, we use a TAS6584 powerstage.

Recently we received three customer claims, and we noticed that the 6584 powerstage was not working properly due to loss of I2C communication.

And we further noticed that the loss of I2C communication happened right after a chip SW RESET(with Mode CTRL Register)

The I2C address is changed from 0xC2 to 0xC0. And this behavior is sporadic.

In our schematic, we use a 1K pull-down register, so the address is supposed to be 0xC2.

I would like to know if this is a known issue to you and how to fix this issue.

Many thanks.

Best regards,

Hua Ma

9 months ago

0 Gregg Scott 9 months ago

TI__Mastermind 45085 points

Hua Ma,

We have not seen this issue. Can I contact you offline so you can share your schematics and pcb layout to understand how the I2C address could be incorrect?

Regards,
Gregg Scott

0 ? ? 9 months ago in reply to Gregg Scott

Prodigy 20 points

Dear Mr. Scott,

my email address and teams account is hua.ma@askgroup.it. I would be glad to share the schematic with you.

Btw, if the time interval between PD raise and STBY raise if too short, will it lead the I2C address change?

Best regards,

Hua

0 Shadow He 9 months ago in reply to ? ?

TI__Mastermind 49770 points

Hi Hua

? ? said:
Btw, if the time interval between PD raise and STBY raise if too short, will it lead the I2C address change?

Not likely, address detect should only related with PD pin.

Please kindly keep the discussion with Gregg through e-mail, thanks.

0 ? ? 9 months ago in reply to Shadow He

Prodigy 20 points

Hi Shadow He,

I don't have Gregg's or your email address, please contact me first though email/teams. thanks

Best regards,

Hua

0 Shadow He 9 months ago in reply to ? ?

TI__Mastermind 49770 points

Hi Hua

Please send to derek-gong@ti.com and shadow-he@ti.com.

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TAS6584-Q1: I2C address changes after SW RESET