• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 263 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

Architecture Difference between LM25576 and LM22678

Jennifer Bowerbank
Prodigy 30 points
Other Parts Discussed in Thread: LM25576, LM22678

Hi, I'm looking at design a power supply with the following parameters:

input 9-30V DC

output 3.8V @ 3A peak

What's the main difference between LM25576 and LM22678, would one be better than the other for this design?

  • 0
    TI__Mastermind 19901 points

    Hello Jennifer, 

    The LM25576 uses emulated current mode control architecture. The LM22678 uses voltage mode control. It has internal compensation and internal softstart feature so the number of external components is reduced. The LM25576 has an adjustable switching frequency, external softstart, sync function, and external compensation. It is more flexible, but it does require a bit more design work than the LM22678.

    Both parts will work well for your design and the LM22678 will support output current up to 5A. Both parts are supported in the WEBENCH online design tool - you can use it to easily select your BOM components. 

    Regards, 
    Denislav