• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 37 subscribers
  • Views 656 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.

webench tps5410 buck converter design

Savas PINAR
Intellectual 270 points
Other Parts Discussed in Thread: TPS5410

hi everyone,

I did design with TPS5410 by the help of webench. Webench gave me a BOM. In this BOM, the given inductor has 47 uH, Idc=1.5A and DCR=0.16 Ohm from TDK supplier. I want to order all component from another component supplier.  But I did not find the inductor with same specs (only the value is same) in this supplier. So, I will order 47uH with approximate valued specs. Here is the confusing point in my head, which Idc and DCR values  are better? more? or less? thanks in advance for any helps.

  • 0
    TI__Mastermind 41310 points

    Savas,

    The "better" values are determined by the design criteria. If you want lower losses, you would want a lower DCR. If you want a lower unit cost, you may tolerate a higher DCR from a less expensive part. For IDC, this will impact reliability of the circuit over the lifetime of the product. IDC is defined as the point where the inductance drops to a certain percentage of the original value of the inductor, or is not recommended to be used (some manufacturers specify 90%, others simply state not to use the inductor at that DC current). A higher IDC will normally (not always) imply a longer lifetime. If your IDC is very close to your continuous operating current, you may want to use an inductor with higher value of IDC (or change the inductor value also). Remember, changing the inductor will also impact the size of the solution. These are all tradeoffs that can be made when designing your circuit.

    Heat, EMI, efficiency, stability, etc. will also come into play when looking at a inductor and its impact on the circuit performance.

    WEBENCH® Power Designer can give you insight into these issues so you can develop a robust design.

  • 0 in reply to Britt Brooks - Online Design Tools
    Intellectual 270 points
    Thank you Britt. I lightened about this subject.
    Savas