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TPA3130D2: 1SPW Modulation

Part Number: TPA3130D2
Other Parts Discussed in Thread: TAS5805

Hi Team,

My customer is curious about 1SPW mode modulation, but the explanation in datasheet is not that specific, could you please share the details about it? Any app notes or reference links is appreciated.

Thanks and Best Regards!

Hao

  • Hi Hao,

    1SPW modulation can fix the duty to ~15% when idle. Hence it has smaller idle current compared with BD mode. As you know, when level of  input signal increse, one pin increase the duty while the other decrease the duty. Hence, only one pin is switching when input signal is high engough. 

    1SPW mode is useful when PVDD is high and better thermal performance is needed. But the THD+N performance may not as good as BD modulation. Hence, TI gives the hybrid modulation that has good THD+N performance as well as good thermal performance. Please refer to TPA3138 or TAS5805/TAS5825 for more information.

    Regards,

    Alix Wan.

  • Hi Alix,

    Thanks!The picture helps, but it doesn't show the block diagram such as the BD mode in TPA3130 datasheet.

    Could you please share it so that we can better understand with both block diagram and input/output waveform? 

    Thanks and Best Regards!

    Hao