应对供电线路错误的理想二极管保护

在双电源供电应用中，供电连接可能被错误地连接，这可导致负载受到损坏。采用LTC4355和LTC44354构成的理想二极管保护方案可提供类似于肖特基二极管的保护模式，但具有更低的功耗，并且布局紧凑、效率提高。
Ideal Diodes Protect Against Power Supply Wiring Errors
Design Note 444
Meilissa Lum

Introduction such errors. Wiring errors could include reverse polarity
High availability systems often employ dual feed power or cross-feed connections. Knowing this, circuit design-
distribution to achieve redundancy and enhance system ers are accustomed to using discrete diode solutions to
reliability. ORing diodes join the feeds together at the protect against such mishaps. It is important that active
point of load, most often using Schottky diodes for low