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
Step aside MEMS. Here comes NEMS
December 10, 2013
Automotive industry sees innovation in products, not business models
Big moves in chip vendor top 20 ranking
Extendible processors go head to head backed by EDA giants
Koch Industries acquires Molex for USD7.2 billion
EnOcean joins the OSGi Alliance to define universal open interface for energy harvesting wireless
December 10, 2013
Energy harvesting wireless solutions specialist, EnOcean, has joined the OSGi Alliance and will now actively contribute to ...
GaN-on-silicon LEDs to grow market share to 40 percent by 2020
Pebble CEO turns back clock
Tyndall National Institute captures snapshots of moving atoms under bursts of light
- 3mm × 3mm QFN IC Directly Monitors 0V to 80V Supplies
- UltraCMOS® Semiconductor Technology Platforms: A Rapid Advancement of Process & Manufacturing
- Adaptive Cell Converter Topology Enables Constant Efficiency in PFC Applications
- Isolated 4-Channel, Thermocouple/RTD Temperature Measurement System with 0.5°C Accuracy
InterviewPerformance monitoring solution helps provide intelligent control of high power systems
A performance monitoring solution designed to enable companies to monitor high power IGBT module systems in locomotive, wind turbine, High Voltage DC and industrial drive applications was unveiled this ...
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
Internet of Things (IoT) manufacturer Ciseco has launched the Raspberry Pi ‘Wireless Inventors Kit’ (RasWIK), featuring 88 pieces to provide everything a Pi owner needs to follow a series of step-by-step projects or to create their own wireless devices, without the need for configuration or even writing code.
RasWIK has been designed to be highly accessible, demystifying the dark art of wireless and enabling anyone with basic computing skills to begin building wireless devices with a Raspberry Pi. You can create anything from a simple traffic light, to a battery monitor, or even a temperature gauge that sends data to the Xively IoT cloud so billions can access the data.This month, Ciseco is giving away twelve Raspberry Pi Wireless Inventors kits, worth £49.99 each for EETimes Europe's readers to win.
And the winners are...
In our previous reader offer, Farsens was giving away five kits for EEtimes Europe readers to evaluate its FenixVortex, Kineo and X1 wireless, battery free sensor tags.
Lucky winners include Mr A. Neil from the UK, Mr. E. Delvaux from Belgium, Mr Lengal from the Czech Republic, Mr H. Bijlsma from the Netherlands, and Mr G. Pfaff from Germany. All should be receiving their packages soon. Lets wish them some interesting findings with their projects.
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.