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Digitally controlled output of LM2576HV-ADJ

HECTOR
Intellectual 865 points

Hello 

I have 50V input DC and I want to control the output of LM2576HV  from 2 to 45V ; by a microcontroller ; it might be pwm ; or analog from DAC  .. 

Any sugegstion for this ? 

We think of adding digital pot on the feedback ; 

Thank you in advanced 

  • 0
    TI__Guru 57555 points

    First I would be careful about checking that the device will operate correctly at the extremes of your input and output range.

    Test this first with fixed dividers.  If it works, then I would use the normal divider with the bottom resistor connected to the DAC rather than ground.