Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
studleylee
User Rank
Author
re: Flyback converter simplifies isolated power design
studleylee   10/24/2012 4:59:03 PM
NO RATINGS
@ETmax of course the ordinary crowd does it with an isolated device off the secondary, that's what makes this novel. that's why this way is cool and cheaper. You can always regulated down from the 5v rail.

M2002
User Rank
Author
re: Flyback converter simplifies isolated power design
M2002   10/23/2012 5:51:23 AM
NO RATINGS
Krh, to answer your question: 1) 85% peak efficiency for 5V output and 87% peak efficiency for 12V output. A more detailed discussion can be found (http://cds.linear.com/docs/LT%20Journal/LTJournal-V22N3-06-df-LT8300-MinChen.pdf). 2) It does scale and you get better efficiency for higher output power. Check LTC's No-Opto Product Family. Thank you!

M2002
User Rank
Author
re: Flyback converter simplifies isolated power design
M2002   10/23/2012 5:43:44 AM
NO RATINGS
What kind of accuracy are you looking for? What do you think of the load and line regulation in Figure 3? Thank you!

krh
User Rank
Author
re: Flyback converter simplifies isolated power design
krh   10/23/2012 12:35:21 AM
NO RATINGS
Bruce, a couple of questions: - I didn't see any discussion in your article about efficiency (but maybe I just missed it). - Does the design scale to higher output power..??

Etmax
User Rank
Author
re: Flyback converter simplifies isolated power design
Etmax   10/23/2012 12:10:00 AM
NO RATINGS
Not a very new technique, but much more practical when integrated into the IC. My only gripe with this method is the accuracy obtainable. I tend to do the sensing on the secondary and then use the opto as a critical switch. You get better regulation and the opto plays less of a role in accuracy. Stability is still an issue of course, but it becomes the same for each unit built making it something you can deal with.

M2002
User Rank
Author
re: Flyback converter simplifies isolated power design
M2002   10/20/2012 5:51:24 AM
NO RATINGS
Indead the load and line regulation is less than 1% across full load and line range (page 3).

agk
User Rank
Author
re: Flyback converter simplifies isolated power design
agk   10/19/2012 12:56:28 PM
NO RATINGS
This is a clever design without the need for an opto coupler to sense the secondary side and to feed the primary side to regulate the secondary output.Many people will like to use this design even though the output load regulation is average.



Radio
NEXT UPCOMING BROADCAST
IoT Network Shoot Out
July 16, 1pm EDT Thursday

Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.

Brought to you by

Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.