LTC2924 datasheet TON / TOFF Calculation formula (P11 , Figure 6. Typical Power Supply Sequencer)

Hi Sir 

As below Figures 5 for spec P11

My customer needs to know how this calculation RA/RB ?

I still can't calculate the RA/RB value of Figure 5 according to this formula.

  • 0
    •  Analog Employees 
    on Jul 19, 2019 4:47 PM

    Hi,

    In figure#5 of the datasheet, the circuit was designed for IHYS = 10uA. Therefore, resistor on the HYS pin, RHYS = 50kOhm. If you use

    IHYS = 10uA

     VON = 3.01V

    VOFF = 2.68V

    and use following equations,

    You will get RB = 33kOhm and RA = 8.45kOhm.

    Let me know if you have any more questions.