TAS5614A output disable / enable time

WSA

Other Parts Discussed in Thread: TAS5614A

We wish to use TAS5614A in a non-audio time division multplexed application which requires floating the outputs when disabled and having active outputs within 200uS of enable (via /reset going high) We are using BTL mode. Does the power up sequence timing allow this?

over 10 years ago

0 Don Dapkus over 10 years ago

TI__Guru**** 189399 points

Hi,

I'm not sure I understand what you are trying to do.

This is my understanding. Is it correct?

You will leave the device powered up.

You will normally have the part in /RESET. You need the outputs to be high-impedance (note, there is a weak pull-down on the outputs to charge the bootstrap cap in /RESET).

You then want to enable the device, and have the outputs switching within 200 us?

-d2

0 WSA over 10 years ago in reply to Don Dapkus

Prodigy 50 points

Yes Don, that is correct.

0 user5276421 over 10 years ago

TI__Mastermind 37045 points

Hello,

The CSTART capacitor is what sets the startup and Shutdown (& time to Hiz) time. We force a constant current and monitor the voltage, so the larger the cap the longer the sequence. For 4.7nF it is something like 10us.

reg,

Paul Chen

Applications Engineer

Dallas TX

Audio

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TAS5614A output disable / enable time