When TPA6132 is not powered up, OUTL/OUTR is high impedance?

Michael Huang3

Other Parts Discussed in Thread: TPA6132A2

Hi team,

I want to know when the TPA6132 is not supplied the power, VCC=0, what is the status of OUTL/OUTR. Are they high impedance?

My customer wants to know it because they want to parallel an audio output there and when TPA6132 is powered, the other audio output signal is not switched on. That audio is active, the TPA6132 is not powered off.

Another question, what about the impedance when only En pin is low but there is power supply on VCC?

And Do TPA613X headphone driver have the same for this kind of feature?

Regards

Michael

over 9 years ago

0 Ivan Salazar over 9 years ago

TI__Guru** 108685 points

Hi Michael,

Measuring directly at the output of the TPA6132A2 when it is powered off it shows high impedance.
TPA6132A2 output impedance during shutdown (EN = 0-V) is typ 20-Ohm.
Each device has different specs for output impedance.

Best regards,
-Ivan Salazar
Texas Instruments

0 Michael Huang3 over 9 years ago in reply to Ivan Salazar

TI__Intellectual 2460 points

Ivan,

Thanks very much for your help.

Just one more step help is needed, could you please confirm if you change the polarity of multimeter?

Best Regards,

Michael

0 Ivan Salazar over 9 years ago in reply to Michael Huang3

TI__Guru** 108685 points

Hi Michael,

The value remains high impedance when changing the polarity.

Best regards,
-Ivan Salazar
Texas Instruments

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When TPA6132 is not powered up, OUTL/OUTR is high impedance?