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News
High Power Negative Supply Ideal Diode-OR Controller Withstands ±300V Transients
2016-03-17 | ReturnThe LTC4371 servos a low 15mV forward voltage drop across the ideal diode MOSFETs to minimize power dissipation in high current applications. The linear servo technique blocks DC reverse current while ensuring smooth current transfer during supply switchover. During an input supply short-circuit, transient reverse current is minimized by a powerful 2A gate turn-off current. A strong 5mA gate pull-up current ensures rapid turn-on of the MOSFET, enabling AC rectification applications. The large gate currents provide plenty of drive when multiple MOSFETs are paralleled in high current 50A and 100A applications. Operating voltage range extends into the hundreds of volts due to the internal shunt regulator, while a 4.5V minimum supply accommodates low voltage −5V and −12V ORing applications. Open-circuit failure of the MOSFET or a series fuse is detected and signaled by a fault status output.
Specified over the 0oC to 70oC commercial and −40oC to 85oC industrial temperature ranges, the LTC4371 is offered in 10-pin MSOP and 3mm x 3mm DFN plastic packages. 1,000- piece pricing starts at $2.50 each. Device samples and evaluation circuit boards are available online or from your local Linear Technology sales office. For more information, visitwww.linear.com/product/LTC4371.
High Power Negative Supply Ideal Diode-OR Controller page 2 Withstands ±300V Transients
Photo Caption:Negative Voltage Supply Active ORing Controller
Summary of Features: LTC4371
.Low Loss ORing of Two Negative Voltage Supplies
.Replaces Power Schottky Diodes & Associated Heat Sinks
.Withstands > ±300V Transients
.Low 15mV Ideal Diode Drop for Reduced Dissipation
.Low 350μA Quiescent Current
.100V Rated High Impedance Drain Pins
.Internal Shunt Clamp for High Voltage Applications
.–4.5V Minimum Operation
.Fast < 220ns Reverse Current Turn-Off
.5mA Gate Pull-Up Current for 60Hz Applications
.Open MOSFET & Open Fuse Detection
.10-Pin MSOP & 3mm x 3mm DFN Packages
Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and
exchange rates.
Source:http://www.linear.com/