Floating surge stopper delivers unlimited overvoltage protection
January 12, 2012 // Christoph Hammerschmidt
Linear Technology has introduced the LTC4366, an overvoltage protection controller for electronic systems. The device is ideal for harsh industrial, automotive and avionic applications where systems must continue operating reliably through severe overvoltage events.
Operating from 9 V to greater than 500 V, the LTC4366 floating surge stopper utilizes an adjustable floating topology to enable very high voltage operation independent of the voltage rating of the LTC4366's internal circuitry. Two internal shunt regulators coupled with the external voltage-dropping resistors generate the LTC4366's internal supply rails. The maximum operating voltage is set by the breakdown of the external resistors and MOSFETS. The LTC4366 is the first product of its kind to protect, for example, a 12 V circuit from a 500 V transient without the need for additional protection components.
The LTC4366 monitors the voltage at its output and reacts quickly to input supply overvoltage by controlling the gate of an N-channel MOSFET. The LTC4366 regulates the output to a user-defined voltage during an overvoltage transient allowing the load to remain operational while the overvoltage is dropped across a MOSFET. An adjustable fault timer ensures safe shutdown if the fault persists.
The LTC4366 is ideal for harsh industrial, automotive and avionic applications where systems must continue operating reliably through severe overvoltage events. High voltage applications include protecting from motor transients, coupled overvoltage, incorrect input supplies or power supply failures. While traditional protection circuitry relies on bulky inductors, capacitors, fuses and transient voltage suppressors to clamp the transient, the LTC4366 protects by series regulating the transient. It is packaged in a tiny 8-lead TSOT-23 and 3-mm x 2-mm DFN packages. During operation, the entire circuit consumes only a few milliamperes, and the device may be shut down to less than 20 µA.
The LTC4366 is available in two options; the LTC4366-1 latches off after a fault, while the LTC4366-2 will retry after a 9-second cool down period. Devices are specified over the full commercial, industrial and automotive temperature ranges. Pricing begins at $2.65 each for
1,000-piece quantities and the device is available today in production quantities.
For more information, visit www.linear.com/product/LTC4366
3D fingerprint scanner beats Apple's
July 06, 2015
Password security is already becoming a thing of the past with biometrics taking their place. For instance, fingerprint identification ...
Solar powered flight smashes long distance records
Electric double-decker buses lead London's zero emission drive
Another kind of SUV: High agility at zero local emissions
Biodegradable electronics debut
Power magnetics Lab Kit enters education
July 03, 2015
Coilcraft has developed a Power Magnetics Lab Kit to help educators provide hands-on experience in their classrooms and instructional ...
Automotive software design: new challenges through multiprocessing
Ultrasound sensor protects pedestrians
Dielectric material helps keep LED packages much cooler
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.