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TAS5162 in PBTL

geert de vries
Intellectual 580 points
Other Parts Discussed in Thread: TAS5631, TAS5162

In an multichannel application where we usually use TAS5631, I tried the TAS5162 in 1N PBTL mode.

Because I wanted to use only 2 inductors (18A -15uH gapped ferrite)  I hardwired outA to outB and outC to outD.

This resulted in very good performance with amazing low distortion figures, also at high levels near clipping.

I see no noticable increase of idle current that may be an indication of timing conflicts in the output stages that are now wired together.

Anybody tried this? How good do these stages A-B and CD match? What could be the drawback of this practice?

  • 0
    TI__Guru**** 189399 points

    Hi, Geert,

    Slight differences in timing between the channels may cause you problems. This is why Fig 17 has the inductors on each output.

    Our newer parts lock the bridges together, but this older one doesn't have that feature.

    I suggest you use four inductors.

    -d2