Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4354
Edited by the Electronicstalk Editorial Team on 20 September 2004
Diode-OR controller saves power and area
The LTC4354 is a -48V diode-OR controller for high availability systems.
The LTC4354 is a -48V diode-OR controller for high availability systems By controlling external N-channel MOSFETs for the redundant supply paths instead of traditional ORing diodes, it dramatically improves efficiency and eliminates bulky heat sinks
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Available in a tiny 3 x 2mm DFN package, the LTC4354 minimises power dissipation due to the lower forward voltage drop, and also saves vital board space.
Operating with supply voltages up to -80V, the LTC4354 turns off the appropriate MOSFET in less than 1us when either power supply fails.
This fast response time prevents reverse currents from reaching damaging levels.
An open drain fault output, capable of driving an LED or optocoupler, indicates if either FET has excessive voltage drop.
This occurs if the FET or series fuse has gone open or if there is a supply overload.
By minimising significant power loss and thereby increasing the system's power efficiency and reliability, the LTC4354 meets the stringent requirements of telecomms standards such as AdvancedTCA, making it suitable for a wide range of high availability applications.
Available from stock and specified over the commercial and industrial temperature ranges, the LTC4354 is available in 8-pin DFN and SO packages.
Pricing begins at $1.95 for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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