TAS5558: volume register 0xD0 programming

Toshiro Imi

Part Number: TAS5558

Tool/software:

Hello,

Our customer has a question why a user should wait for 1.5x slew rate period after he program volume register 0xD0 in TAS5558 shown in below, becuase this restriction makes him complicated software development, according to him.

Could you please help him why TAS5558 needs this restriction.

** quote from TAS5558 datasheet "7.6.2.37 Volume, Treble, and Bass Slew Rates Register (0xD0)"

Note: Once the volume command is given, no I2C commands should be issued until volume ramp has finished. The lock out time is 1.5 × slew rate or defined in 0xD0

best regards,

10 days ago

0 Sydney Northcutt 9 days ago

TI__Expert 6620 points

Hello,

Responses will be delayed due to US holiday. Please expect a response by mid next week. Thank you for your patience!

Regards,
Sydney Northcutt

0 Toshiro Imi 7 days ago in reply to Sydney Northcutt

TI__Expert 6350 points

Hello,

OK, I understood. Could you kindly help him as soon as you are back to office.

Best regards,

+1 Ramsey Foote 6 days ago in reply to Toshiro Imi

TI__Intellectual 795 points

Hi Toshiro,

This is done to prevent class-D amps that are open loop from potentially becoming unstable. If something changes while the volume ramps, it would be possible for these uncontrolled types of amps to behave poorly.

Regards,

Ramsey

0 Toshiro Imi 6 days ago in reply to Ramsey Foote

TI__Expert 6350 points

Thank you very much for your help. Your answer resolve his issue.

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TAS5558: volume register 0xD0 programming