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LM51772: Smoothly move from DIV10 to DIV20

Stoil Terziev
Prodigy 40 points
Part Number: LM51772

Tool/software:

I need to drive via I2C voltage from 1v to 48v without stops the converter. This mean chip need to switch after 24v on DIV20, and if new voltage drop down 24v to switch on DIV10. How to do it without voltage peaks.

And when write in registers new voltage value , how is better to write registers : first MSB or LSB byte.

  • 0
    TI__Guru 58641 points

    Hi Stoil,

    sorry there is not smooth way to change between the DIV10 and DIV20 in running mode. You can just set the slew rate to the min value and then try to make this required updates as fast as possible via I2C.

    Regarding the write order of MSB and LSB: there is not difference, the update will be accepted and executed once both registers are written.

    Best regards,

    Stefan