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
First color-tunable graphene-based LED is demonstrated
July 29, 2015
Researchers at Tsinghua University in Beijing have demonstrated an LED that can be tuned to emit different colors of light ...
Qualcomm enables wireless charging for mobile devices with metal cases
Intel, Micron launch "bulk-switching" ReRAM
Demand for radar systems boosts Infineonís chip production
'Test city' opens for autonomous cars
AMS buys environmental sensor business from NXP
July 28, 2015
AMS AG has acquired an environmental sensor business unit from NXP Semiconductors NV for an undisclosed amount of money. ...
MEMS force sensor in a chip-scale package begins sampling
World first: Samsung monitor integrates inbuilt wireless charging
Breakthrough for really cost-efficient fuel cells in sight?
- Dual Phase Buck Controller Drives High Density 1.2V/60A Supply with Submilliohm DCR Sensing
- Test environment for the positioning elements of wearable devices
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
- Top 5 Challenges for testing Today's Consumer Electronics
InterviewGlobalfoundries' CEO on why FD-SOI and why now
With its latest news Globalfoundries Inc. has not only confirmed itself as a supporter of the fully-depleted silicon-on-insulator (FD-SOI) approach to IC manufacturing but that it also thinks sufficiently ...
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.