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TPS92682-Q1: solution evaluation

Iris Shen
Expert 4002 points
Part Number: TPS92682-Q1

Hi team,

My customer want to use TPS92682 in two conditions as below, could you please help to evaluate the application possibility and limitation?

1. Configurate the 2 channels as: Buck-Boost CC mode. Vin=7~18V, Vout=50V, Iout=1A. So total maximum output power is 100W. What factors determine the maximum output current in CC mode?

2. Vin=7~18V. Configurate channel 1 as Boost CV mode, Vout=55V, Ioutmax=1.6A. Configurate channel 2 as Buck-Boost CC mode, Iout=1.2A, Vout=60V. Could you please suggest if one channel is Boost CV, one channel is Buck-Boost CC, how to determine the maximum output power for each channel?

Thanks for your support!

  • +1
    TI__Mastermind 18890 points

    Iris,

    1.  If output voltage for the CC mode is always 50V and the output is always higher than the input voltage then they should use a the Boost topology not the Buck-Boost.

    2.  For the single CV boost with 88W output the major concern is thermal management.  The TPS92682 is a controller so this is feasible with one channel but we recommend running the in dual phase with both channels here because of thermal if power is continuously being drawn at 88W.  However, that will take up both channels of the TPS92682. 

    Again, for the CC current at 60V output they need to use the CC Boost not Buck-Boost.

    Thanks Tuan