Design Con 2015
Breaking News

80V Synchronous SEPIC/Inverting/Boost Controller IC With 3 Regulation Loops

In today’s modern electronic systems, the need for power conversion circuits that can do more than simply convert one voltage to another is growing. Some systems require a constant current output or a constant voltage output; others may require the current to flow from input to output or output to input. All of these requirements are in addition to the normal requirements of high conversion efficiency and high operating voltage ranges.

Linear Technology’s LT8710 is a synchronous SEPIC/inverting/boost controller IC with three regulation loops, which can operate from an input voltage up to 80V. When configured as a SEPIC or boost converter, the output voltage can be set from 1.3V to 80V. When the LT8710 is used in an inverting converter, the output voltage can be set from -0.1V to -80V. The LT8710 can operate with input voltages above, equal to, or below the desired output voltage when operating as a SEPIC converter. As long as the output voltage is greater than 4.5V, the input voltage can drop down to nearly 0V, and the converter will still operate, which allows for very wide input range applications. The integrated strong gate drivers allow a single LT8710 circuit to process up to 100W of power.

The LT8710 has three regulation loops built in. These loops can be set up to regulate output voltage, output current, and input voltage. Any combination of these loops can be used in a given system. The FLAG pin on the LT8710 is an open-drain pin that operates as a power good and 1/10th charging current detection (C/10) pin. The C/10 functionality is very useful when charging sealed lead acid batteries to set a bulk and float battery voltage. Input voltage regulation can be used to avoid collapsing a high-impedance input supply such as a solar panel. In case the input source is suddenly removed, the LT8710 can command current from output to input, and the input voltage can be held up for some time as set by the input voltage regulation loop, creating a backup power source.
5/19/2014 12:40 PM EDT | Post a comment
Related Videos
Linear Technology
This video explores the LT3086, a new member of our LDO+ ...
Differential op amps are important building blocks in ...
Wireless sensor networks in general have a wide array of ...
LDO+ regulators do more than just regulate. They include ...
Bandwidth has become more precious than gold. As we push ...
The digital power supply market has achieved rapid progress ...
Linear Technology’s LTM®4620 uses a proprietary lead frame ...
Pulsed loading conditions and abnormal disturbances within ...
With the increased-use of electronics in automotive and ...
Linear Technology’s LT®3970/LT3971 lead the industry in ...
The LTC3639 step-down regulator integrates key high ...
Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Are Today's Designs Bound by the Constraints of Yesteryear?
Max Maxfield
As part of my ongoing Pedagogical and Phantasmagorical Inamorata Prognostication Engine project (try saying that 10 times quickly), I'm working with Jason Dueck from Instrument Meter ...

Jolt Judges and Andrew Binstock

Jolt Awards: The Best Books
Jolt Judges and Andrew Binstock
1 Comment
As we do every year, Dr. Dobb's recognizes the best books of the last 12 months via the Jolt Awards -- our cycle of product awards given out every two months in each of six categories. No ...

Engineering Investigations

Air Conditioner Falls From Window, Still Works
Engineering Investigations
It's autumn in New England. The leaves are turning to red, orange, and gold, my roses are in their second bloom, and it's time to remove the air conditioner from the window. On September ...

David Blaza

The Other Tesla
David Blaza
I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...