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
Report: Abu Dhabi holding talks over GloFo sale
November 25, 2015
Abu Dhabi sovereign wealth fund Mubadala Development Co. has held talks with potential buyers for all or part of Globalfoundries ...
InvenSense to add PUF security to sensors
Flexible sensor detects multiple ions in fluids
Microsemi sees off Skyworks to win PMC-Sierra
Starting all over again on plastic: ARM
From electronics to maths and money madness
November 23, 2015
Dennis Feucht discusses different infinities, the madness of George Cantor and what can be learned about the irrational exuberance ...
Analog IC market growth set to slow
Volkswagen deploys data glasses in series production
Startup CircuitSeed wants to be the ARM of analogue
- Battery Size Matters
- Software-Defined Radio Handbook - 11th edition
- Multichemistry Buck Battery Charger Controller
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
InterviewCEO interview: InvenSense's Abdi on expanding MEMS horizons
InvenSense Inc. is a MEMS company that has epitomized a fabless approach to a sector that is still highly reliant on a thorough grasp of the manufacturing and packaging processes. We interviewed CEO Behrooz ...
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, FTDI Chip is giving away six MCU development board packages complete with a dedicated compiler (including a full integrated development environment).
Worth Euro 315 each, the packages include a credit card sized Clicker 2 board for the FT90X 32-bit MCU supplied alongside a powerful dedicated compiler from MikroElektronika.
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.