REGISTER | LOGIN
Breaking News
Comments
Newest First | Oldest First | Threaded View
jason8957
User Rank
Author
Re: 25%?? Huh!!
jason8957   1/27/2017 5:23:05 PM
NO RATINGS
My concern is also trying to stay near the peak of the efficiency curve, which may be at 70 - 80% of max power.  An oversized power supply running at 50% capacity may be less efficient, which may matter for heat dissipation or a battery system.

David_Ashton_EC
User Rank
CEO
25%?? Huh!!
David_Ashton_EC   1/20/2017 5:48:01 PM
NO RATINGS
Would've aced it but I put 50% in Q2.  I'd still stick to that, unless it's a very high and known steady load.  For small power supplies, whether linear or switching, running them close to max load is asking for trouble, usually early failure, and the extra investment in a bit more capacity will repay itself in reliability,

Andy_I
User Rank
Author
Question 3 choices
Andy_I   1/20/2017 2:30:31 PM
NO RATINGS
In question 3, what's the difference between choices (b) and (d)?

And, what's the difference between (c) and (e)?



Like Us on Facebook
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Test Tool Finds Ethernet Wiring Errors
Martin Rowe
Post a comment
When my house was renovated several years ago, I had the electrician install network outlets in numerous places, then run the LAN cables to a wiring closet. But he didn't document the ends ...

Martin Rowe

Local Electronics Store Supplies Engineers and Hobbyists
Martin Rowe
6 comments
Rochester, N.Y. — Tucked away in this western New York city known for its optics is Goldcrest Electronics, a local store that's supplied businesses and individuals with electronic ...

Martin Rowe

How to Transform a Technology University (Book Review)
Martin Rowe
1 Comment
The Presiding Genius of the Place by Alison Chisolm. WPI, Worcester, Mass., 234 pp., 2016. Engineers love to discuss, and often criticize, engineering education. They often claim ...

Max Maxfield

Aloha from EEWeb
Max Maxfield
1 Comment
Just a few minutes ago as I pen these words, I posted this blog about this month's Cartoon Punchline Competition over on EEWeb.com.