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UCC3895 question

Roger Ding
Intellectual 1720 points
Other Parts Discussed in Thread: UCC3895

There is UCC3895 question .

 

For the value of UCC3895 Rdelab and Rdelcd, why the resistor value is limit between 2.5K and 40K? what influence is the resistor value over 40K?

 


 

 

 

  • 0
    TI__Intellectual 1390 points

    Hi Roger,

    DELAB and DELCD source about 1 mA maximum. Choose the delay resistors so that this maximum is not exceeded. For an optimum performance keep stray capacitance on these pins at less than 10 pF.

    If the resistor connected to DELAB and DELCD is larger than the claimed maximum in the operation condition table, the internal circuit might operate abnormally.

    Best Regards

    Frank