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Original question:

TAS3251EVM: Post Filter Feedback - Zobel Network

TAS3251: TAS3251 Zobel Network

user4991603
Prodigy 170 points
Part Number: TAS3251

Tool/software:

Hello,

on the TAS3251 outputs we have the following filter network and during our first tests all resistors of the Zobel network burned.

The speaker have an impedance of 6 Ohms.

I told the buying department to buy resistors in the range of 4.7 Ohm to 22 Ohm and capacitors from 1nF to 33nF.

Can you give me any suggestion on which values I should use?

Best regards,

Stephan

  • 0
    TI__Genius 9175 points

    Hi Stephan,

    If the resistors in the zobel had burnt up, then a likely issue was the power rating of the resistors. Make sure the resistors are rated appropriately for the power expected. Some common zobel circuits for this device are a 1uF and 3.3Ohm or a 220nF and 1Ohm RC circuit.

    Regards,

    Ramsey