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Eddie Lam

Other Parts Discussed in Thread: TPA3123D2, TPA3100D2, TAS5414A

Dear Sir,

I am testing the TPA3123d2. It seems that I cannot connect many(e.g. four) 8 ohm speakers at the BTL output of TPA3123d2, why?

Thanks.

Regards,

Eddie

over 13 years ago

0 Don Dapkus over 13 years ago

TI__Guru**** 189399 points

Eddie,

Do you mean paralleling the speakers? If so, this is a little tough because the low-impedance will trip our short-circuit protection.

-d2

0 Eddie Lam over 13 years ago in reply to Don Dapkus

Prodigy 70 points

Hi Don,

Yes, I mean paralleling four 8 ohm speakers.

Can TPA3123 deal with 2 ohm load without short circuit protection? if No, any suggestion on how to modify the circuit in order to avoid that?

Thanks.

Regards,

Eddie

0 Don Dapkus over 13 years ago in reply to Eddie Lam

TI__Guru**** 189399 points

Hi, Eddie,

No, it can't do that. In fact, in BTL mode, the minimum load resistance is somewhere around 8 ohms. You could use something like TPA3100D2 and run two speakers in parallel on one output, and the other two on the other output.

You could also look at the TAS5414A which can drive down to 2-ohms, AND it has 4-channels, so you wouldn't need to parallel them.

-d2

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