Surge stopper integrates ideal diode for comprehensive protection against transient voltages
July 24, 2012 // Paul Buckley
Linear Technology Corporation has introduced a surge stopper with ideal diode, providing compact and low-loss protection for 4 V to 80 V electronics in automotive, avionics and industrial systems.
The LTC4364 surge stopper shields downstream electronics from input overvoltages and overcurrent, enabling continuous operation through transient surges. Overcurrent limiting protects the system and supply from short-circuits at the load. Unique to the LTC4364 is ideal diode control, which replaces a Schottky diode in the power path with a low loss N-channel MOSFET. The ideal diode, along with a robust front-end, protects the load from a reversed input down to -40 V and maintains the output voltage during an input brownout.
During an input voltage surge, such as automotive load dump, the LTC4364 drops the excess voltage across an external MOSFET while regulating the output to an adjustable safe voltage. This enables the use of lower voltage rated electronics downstream. Similarly, during a current surge, the LTC4364 regulates the forward path to a current limit set by a sense resistor. For persistent overvoltage or overcurrent conditions, a VDS-accelerated timer with early warning indicator ensures safe shutdown of the MOSFET.
The LTC4364’s wide operating range maintains operation in automotive cold crank when the battery voltage could dip down to 4 V. With a simple input clamp, the device can handle transient surges beyond 100 V and can even survive -20 V at the output. The latter, along with diode blocking and overcurrent limiting, makes the LTC4364 a complete solution for protecting output ports. Adjustable input undervoltage and overvoltage thresholds block start-up for out-of-range voltages, avoiding deeply discharged batteries and auto-retry into a fault condition. A low 370 µA operating and 10 µA shutdown current prolongs battery life. The device can also be used for inrush current control, providing HotSwap capabilities.
Availability and Pricing
The LTC4364 is available in two options. After a fault, the LTC4364-1 latches off the pass transistor, whereas the LTC4364-2 enables a 0.1% duty cycle auto-retry. Specified over the full commercial, industrial and automotive temperature ranges, the LTC4364 is offered in 14-pin DFN (4mm x 3mm), and 16-lead MSOP and SO packages. Pricing begins at $3.45 each for 1,000-piece quantities and the device is available today in production quantities. Evaluation circuit boards are available.
More information about the LTC4364 surge stopper www.linear.com/product/LTC4364
Volvo shows user interface for self-driving cars
October 05, 2015
Automated driving poses specific requirements to the user interface of the cars, in particular for the transition phases ...
Volkswagen has given engineering a black eye
MEMS platforms are way to go, says Bosch's Finkbeiner
Put FPGAs in your SoCs
Daimler tests self-driving truck on public highway
Silicon Labs prevails in Cresta patent dispute
October 02, 2015
Silicon Labs has announced that the U.S. International Trade Commission (ITC) has found no patent violation by Silicon Labs ...
Machine learning for every app
Heat helps rechargeable batteries extend lifetimes
Cyber threats against cars are here to stay, experts say
- Determine Balancing Current for the LTC3305 Lead-Acid Battery Balancer
- 3 Ways to Simplify Medical Device Testing
- Thread Networking Protocol Simplifies Connecting “Things” in the Home and Beyond
- High Voltage CMOS Amplifier Enables High Impedance Sensing with a Single IC
InterviewMEMS platforms are way to go, says Bosch's Finkbeiner
In the two years since we last interviewed Stefan Finkbeiner, CEO of Bosch Sensortec, the company has taken over from STMicroelectronics as the leading global supplier of MEMS components. Here he explains ...
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, LabNation is giving away three of its SmartScope open source USB oscilloscopes, worth 229 Euros each, for EETimes Europe's readers to win.
Successfully funded through Kickstarter last year, the SmartScope is claimed to be the world's first test equipment designed to run on multiple operating systems and platforms such as smartphones, tablets and PCs. It is powered directly from... 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.