CC-PWRR01 冗余电源模块 用于在主电源故障时接管设备供电

冗余电源模块是一种电源设备，用于在主电源故障时接管设备供电，以确保设备不间断运行和网络高可用性。它通常由两个完全一样的电源组成，由芯片控制进行负载均衡。当一个电源出现故障时，另一个电源会立即接管其工作。

冗余电源模块的配置形式有多种，例如1+1电源配置，表示该服务器有一个电源模块即可正常工作，但在配置上是两个电源模块，其中一个电源模块作为冗余电源备份。

冗余电源模块与UPS的主要区别在于冗余电源模块是由两个或更多完全一样的电源组成，而UPS则是一个电源供电另一个则随时备用，有需要时自动切换。

冗余电源模块的工作原理是当主电源故障或停电时，备用电源会自动接管供电，以保证服务器的正常运行。冗余电源模块通常采用热备份方式工作，即主电源和备用电源同时连接到服务器，但备用电源处于待机状态，不提供电力。只有当主电源故障或停电时，备用电源才会自动接管供电。

为了实现无缝切换，冗余电源模块通常具有快速切换机制。当主电源发生故障或停电时，切换机制会迅速将备用电源切换到负载中，以保证服务的连续性和稳定性。

在电源模块插入时，如果UV引脚的电压低于锁定电压1.220V，GATE端输出为0V，场效应管FET1和FET2会关断。随着VCC引脚的电压因电容充电而缓慢上升，UV引脚的电压也随之升高。当该电压高于1.224V时，FET的门极通过10μA的电流源充电，GATE引脚电压上升的斜率为10μA/CG，使得FET中的电流缓慢上升。这样，新插入的电源无缝连接到负载中，避免了浪涌电流进入电源系统。

在电源模块关闭或拔出时，LTC4350会对FET的门极快速放电，UV引脚的电压将跌落至1.220V以下时，FET关断，使电源与负载隔离开来。

CC-PWRR01

A redundant power supply unit (PSU) is a power supply device that takes over the power supply when the main power supply fails to ensure uninterrupted operation of the device and high network availability. It usually consists of two identical power supplies, which are controlled by the chip for load balancing. When one power supply fails, the other power supply immediately takes over its work.

Redundant power supply modules can be configured in various modes. For example, 1+1 power supply configuration indicates that a server can work properly with one power supply module. However, two power supply modules are configured.

The main difference between a redundant power supply module and a UPS is that a redundant power supply module is composed of two or more identical power supplies, while a UPS is powered by one power supply and the other is standby at any time and automatically switches when necessary.

When the active power supply is faulty or power is cut off, the standby power supply automatically takes over power supply to ensure normal running of the server. Redundant power modules usually work in hot backup mode. That is, the active power supply and standby power supply are connected to the server at the same time, but the standby power supply is in standby state and does not provide power. Only when the main power fails or the power goes out, the backup power will automatically take over the power supply.

In order to achieve seamless switching, redundant power modules usually have a fast switching mechanism. When the main power supply fails or the power outage occurs, the switching mechanism will quickly switch the standby power to the load to ensure the continuity and stability of the service.

When the power module is inserted, if the voltage of the UV pin is lower than the locking voltage of 1.220V, the GATE output is 0V, and the FET FET1 and FET2 will be turned off. As the voltage of the VCC pin slowly rises due to capacitor charging, so does the voltage of the UV pin. When this voltage is higher than 1.224V, the GATE of the FET is charged through a current source of 10μA, and the slope of the gate pin voltage rise is 10μA/CG, causing the current in the FET to slowly rise. In this way, the newly inserted power supply is seamlessly connected to the load, avoiding the inrush current entering the power supply system.

When the power module is turned off or pulled out, the LTC4350 will quickly discharge the gate of the FET. When the voltage of the UV pin will drop below 1.220V, the FET will be turned off, isolating the power supply from the load.