• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 273 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.

PTN78060W Input Output Voltage Considerations

Aizat Hashim
Prodigy 10 points
Other Parts Discussed in Thread: PTN78060W

Hello,

Regarding to the subject above, I'm wondering if we're not following its requirements. In my case, I want a Vout = 12V with Vin varies between 12-14V and Rset = 21kohm. Will Vout be maintaining its 12V since my Vin is not Vout+2.5V like you've mentionned in the PTN78060W datasheet? If it will, what issues would it be in terms of performances (Vout, efficiency, etc.)? 

Thanks in advanced for the reply.

Aizat

  • 0
    TI__Mastermind 38230 points

    PTN78060W is a step down buck regulator which requires Vin to Vout ! 2.5V ! for regulated output voltage. The duty cycle  must not be more than 85%  Vin to Vout  or 14.5Vin to 12Vout. 12Vin to 12Vout  implies 100% duty cycle.

    The PTN series will not regulate the output voltage  with 12Vin=12Vout. It willl be very unstable 12Vin=12Vout  and when setup in this configuration , it will likely overstress the converter.

     I suggest you submit thsi application  to the non-isolated controller forum when they may suggest a controlller for this application. Include the output current.

    Tom