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BUCK with I2C program

Jung-Ho Seo
Expert 5940 points

Hello BU experts,

Is there BUCK solution for below requirements ?

INPUT : 14V

Output : 3V~11V (variable)

Output current : Max 1A

both external feedback and I2C  program support for variable output.

Thanks,

JH.

  • 0
    TI__Guru 56915 points

    Jung-Ho Seo

    I am not aware of a Buck converter with an I2C interface that supports a 14V input to 11V output and an approximately 4:1 output voltage adjustment range to support 3V to 11V via I2C.

    The best option would likely be to add an I2C controlled DAC or potentiometer (Digipot) to the feedback of an analog converter to adjust the output voltage by injecting a current into the feedback loop.  Select a 2-3A converter capable of supporting the 14V to 11V conversion, then inject current from the DAC, or increase the FB to GND resistance with a digipot to reduce the output voltage.