Breaking News
Comments
Newest First | Oldest First | Threaded View
CasperSA
User Rank
Rookie
re: Linear WLED drivers and the future of LCD backlighting
CasperSA   1/7/2011 3:22:06 PM
NO RATINGS
a thing that one miss in most of these introductory notes is the fact that in some applications one would also like to control the maximum voltage on a LED string and not only the led string current... not all devices on the market has this function. This is for example when you have different devices on a control panel such as displays and luminating LEDS on control buttons and knobs. In these applications controlling the voltage reduces the number of different types of LED driver devices required.

old account Frank Eory
User Rank
Rookie
re: Linear WLED drivers and the future of LCD backlighting
old account Frank Eory   12/22/2010 7:52:00 PM
NO RATINGS
Hmmm, series vs. parallel connections of WLEDs? This seems very timely in this holiday season when many non-engineers learn about series vs. parallel circuits the hard way as they debug strings of Christmas lights that don't fully light!

sharps_eng
User Rank
Rookie
re: Linear WLED drivers and the future of LCD backlighting
sharps_eng   12/22/2010 10:31:21 AM
NO RATINGS
Students might like this; comparing several engineering solutions for the same problem. Sure, it is a little biased in favour of Micrel's product, but hey, it is an infomercial, after all. I agree about the charge pump's unavoidable inefficiency (peak currents are huge if the switches have low R(on)); but I don't think an inductive buck/boost circuit can be dismissed quite so easily, especially if it extends battery life for the whole product. Here's three ideas for comment: - I foresee the next generation switchers using tiny ultra-high-frequency SiC devices switching 'free' inductors formed from PCB traces. - Staying with analog, maybe it's about time a manufacturer made a LED with a self-regulating characteristic. - Could LEDs be made tough enough to work as switcher diodes, thus making a self-illuminating regulator?



EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

What's the Best Traveling Toolkit?
Max Maxfield
12 comments
A few years ago at a family Christmas party, I won a pocket knife as part of a "Dirty Santa" game. This little scamp was a Buck 730 X-Tract. In addition to an incredibly strong and sharp ...

Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
9 comments
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
41 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
153 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

Top Comments of the Week
Flash Poll
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)