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TPS65219: buck regulator as pass through for audio speaker amp tas2563

Azmat Bilal
Prodigy 40 points
Part Number: TPS65219
Other Parts Discussed in Thread: TAS2563,

Hi,

we are developing a battery powered audio device which will have besides other modules, 2 speaker amps TAS2563 which are boosted amplifiers taking input from single cell batteries. we were exploring PMIC to best suit our needs. TPS65219 could be a good solution since we will be able to use 4 LDOs and 1 buck for each of our module excluding spk amps. however for the speaker amps we are not sure which way to go. the options are.

1- connect them directly to the vbat and not route them through the pmic. maybe use the pmic gpio for power sequence but we can also use the MCU for this purpose.

2. connect them to one of the buck regulator or two separately. this will result is  vbat>buck(pmic)>boost(amp). is this a good idea?

3. if possible use the buck output to provide power but use the buck as a passthrough or a load switch. 

4. or if there is a better option out there which we can use.

  • 0
    TI__Mastermind 22175 points

    Hi Azmat,

    For TPS65219 the BUCKs don't have a pass though option.

    You could use the BUCK as a power source for the speaker amp depending on the current load you are expecting. I believe BUCK1 is capable of 3.5A output and BUCKs 2 and 3 are both capable of 2A output.

    I'm not familiar with the TAS2563 so I don't know if there are special input consideration for this device.

    Regards,

    James