Ideal diodes protect against power supply wiring errors
Meilissa Lum
Abstract
An ideal diode solution using the LTC4355 and LTC4354 which provides protection similar to Schottkys, but with much lower power dissipation, is described.
Keywords
Ideal diode
LTC4355
LTC4354
Introduction
High availability systems often employ dual feed power distribution to achieve redundancy and enhance system reliability. ORing diodes join the feeds together at the point of load, most often using Schottky diodes for low loss. MOSFET-based ideal diodes can be used to replace Schottky diodes for a significant reduction in power dissipation, simplifying the thermal layout and improving system efficiency. Figure 189.1 shows the LTC4355 and LTC4354 ...
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