| Vicor PI2121高效低功耗电源方案 |
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| 作者：未知 来源：Vicor 点击数：138 更新时间：2008-9-28 |
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Vicor 公司的PI2121集成了高速ORing MOSFET控制器和非常低导通电阻的MOSFET,是完整的全功能Active ORing低功耗电源解决方案. PI2121主要应用在N+1冗余电源系统,服务器和高端计算,通信系统,高边Active ORing以及大电流Active ORing.本文介绍了PI2121的主要特性,方框图, 高边Active ORing 应用框图以及100A Active ORing 应用电路图和PI2121-EVAL1评估板电路图与材料清单(BOM).
The Cool-ORing PI2121 is a complete full-function Active ORing solution with a high-speed ORing MOSFET controller and a very low on-state resistance MOSFET designed for use in redundant power system architectures. The PI2121 Cool-ORing solution is offered in an extremely small, thermally enhanced 5mm x 7mm LGA package and can be used in low voltage (≤ 5Vbus) high side Active ORing applications. The PI2121 enables extremely low power loss with fast dynamic response to fault conditions, critical for high availability systems. A master/slave feature allows the paralleling of PI2121 solutions for high current Active ORing requirements.
The PI2121, with its 1.5mΩ internal MOSFET provides very high efficiency and low power loss during steady state operation, while achieving high-speed turn-off of the internal MOSFET during input power source fault conditions that cause reverse current flow. The PI2121 provides an active low fault flag output to the system during excessive forward current, light load, reverse current, over-voltage, under-voltage and over-temperature fault conditions. A temperature sensing function indicates a fault if the maximum junction temperature exceeds 160°C. The under-voltage and over-voltage thresholds are programmable via an external resistor divider.
PI2121主要特性:
Integrated High Performance 24A, 1.5mΩ MOSFET
Very-small, high density fully-optimized solution providing simple PCB layout.
Fast Dynamic Response to Power Source failures, with 160ns reverse current turn-off delay time
Accurate sensing capability to indicate system fault conditions
Programmable under & over-voltage functions
Over temperature fault detection
Adjustable reverse current blanking timer
Master/Slave I/O for paralleling
Active low fault flag output
PI2121应用:
N+1 Redundant Power Systems
Servers & High End Computing
Telecom Systems
High-side Active ORing
High current Active ORing (≤ 5Vbus)
图1. PI2121方框图
图2.PI2121 高边Active ORing 应用框图
图3.两个PI2121 在高边ORing配置图
图4.PI2121在100A Active ORing 应用电路图(主/从配置)
PI2121-EVAL1评估板
The PI2121-EVAL1 Evaluation Board is intended to acquaint the user with the benefits and features of the Cool-ORingTM PI2121 full function Active ORing solution. It is not designed to be installed in end-use equipment.
图5. PI2121-EVAL1评估板外形图
图6.PI2121-EVAL1评估板电路图
PI2121-EVAL1评估板材料清单(BOM):
详情请见:
http://www.vicorpower.com/picorpower/data_sheets/ds_pi2121.pdf
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