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PTN78000W output adjustment with DAC

Vlad Sergeyev
Prodigy 120 points
Other Parts Discussed in Thread: PTN78000W

Hi,

Is it possible to adjust PTN78000W using DAC voltage?

Thanks,

Vlad

  • 0
    TI__Mastermind 38230 points

    Hi Viad:

    The PTN series can be controlled with a DAC. The maximum voltage which can be applied to the Rset adjustment pin is 1.25V.

    One suggestion  is to pre-set with a resistor to the nominal Vout in the event the DAC does not function at power up.

    The one concern is the DAC voltage must  be present  before the module is power-up.Other wise the Vout is unpredictable . The output voltage tolerance is only as good as the DAC control voltage.

    I attached note with the formula  for  the voltage control  .

    You can send me an e-mail at tguerin@ti.com for more details .

    Tom

    PTN780X0 Voltage control formula .doc