TPA3255: TPA3255 MASTER / SLAVE config

Meican Wu

Prodigy 200 points

Part Number: TPA3255

Hello,

i am using TPA3255 for 4.1 system: 3-TPA3255 are config as : 1 TPA3255--2xBTL, 1 TPA3255--2xBTL,1 TPA3255--1XPBTL.

What's the master/slave considering here? and how to setup master/slave here .?

Thanks!

Meican.

over 5 years ago

0 Sam(MPAA) Zhang over 5 years ago

TI__Mastermind 19080 points

Hi Meican,

Please refer to EVM user's guide for some multi-device configuration examples in below link,

http://www.ti.com/lit/ug/slou441/slou441.pdf.

Thanks!

Regards,

Hao

0 Meican Wu over 5 years ago in reply to Sam(MPAA) Zhang

Prodigy 200 points

yes the EVM document says how to setup master/ slave. but what's the benefit for master and slave? if i use 3 TPA3255, ALL are master , it is ok?

Thanks!

Meican.

0 Sam(MPAA) Zhang over 5 years ago in reply to Meican Wu

TI__Mastermind 19080 points

Hi Meican,

All 3 masters is definitely OK. The benefit for master and slave is that by doing this, the switching of different channels will be synchronized and interleaved, which could alleviate the current surge on PVDD supply.

Regards,

Hao

0 Meican Wu over 5 years ago in reply to Sam(MPAA) Zhang

Prodigy 200 points

Great!

Then the next question is : how to generate the OSC_IOP/IOM to TPA3255? what 's the frequency and level spec for this pulse ?

thanks!

Meican.

0 Sam(MPAA) Zhang over 5 years ago in reply to Meican Wu

TI__Mastermind 19080 points

Hi Meican,

If you leave the devices work independently, in other words, all in master mode, they will work on their own oscillator. In this case, OSC_IOP/M should be leave floating. These pins are only for inter-devices clock synchronization in master/slave configuration.

Regards,

Hao

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TPA3255: TPA3255 MASTER / SLAVE config