• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 171 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

How to change TPS54227 Vin range?

Chen Bogey8
Mastermind 9990 points
Other Parts Discussed in Thread: TPS54227

Dear Sir

We know TPS54227 Vin range is 4.5V~18V, but if we want work in Vin 8V~18V(TPS54227 turn on after Vin>=8V), may we use enable pin to control?

and how to calculate it? i can't see in datasheet. what we need notice.

                                                                                                    Best regards,

                                                                                                                      Bogey

  • 0
    TI__Guru**** 191445 points
    I don't think the EN voltage threshold is tightly controlled. Is there a particular reason why you need to turn on the device at Vin = 8 V? You could set a voltage divider for the actual threshold ( I will have to look it up tomorrow) or provide a precision comparator to detect the input voltage and toggle the logic level of EN from low to high. If you use an external comparator, you can adjust the hysteresis. If you use a resistor divider, you will just get the standard 100 mV. let me know your actual requirement.