MAX5927A

低电压、四路、热插拔控制器/电源排序器

三/四通道热插拔控制器,为低压电源提供排序、跟踪或独立的通/断控制


点击查看特定型号的库存状况。

说明

MAX5927A/MAX5929A–MAX5929D +1V至+15V四通道热插拔控制器为多路电源系统提供完整保护,保证电路板安全插入或拔出带电背板。这些器件支持+1V至+15V多组电源的热插拔(只要一路电源电压等于或高于+2.7V)。各路输入电源(通道)可以配置为顺序开/关、相互跟踪或完全独立的工作方式。

电路板卡上已放电的滤波电容对于带电背板呈现为低阻。由背板涌入电路板卡的高浪涌电流会烧毁连接器和元件,或瞬间拉低背板电源电压,导致系统复位。插入电路板时,MAX5927A/MAX5929A–MAX5929D热插拔控制器逐渐升高输出电压,并将电流控制在一个预定的界限内,使系统安全地达到稳定。启动周期完成后,片上比较器可针对短路和过流故障提供VariableSpeed/BiLevel™保护,并对系统噪声和负载瞬变不敏感。发生故障时断开负载。MAX5929C/MAX5929D在发生故障后可自动重启,MAX5929A/MAX5929B则必须重新触发开启。MAX5927A的故障管理模式可选。

MAX5927A/MAX5929A–MAX5929D提供多种选项,有助于减少外部元件数量,缩短设计时间。这些器件均集成了电荷泵(用于驱动外部低成本n沟道MOSFET的栅极)、可调节启动定时器以及可调节电流门限。该器件提供的一些集成功能(例如:启动电流控制和脉冲电流保护等)可以使用户省掉外部定时电阻和电容。MAX5929B/MAX5929D为每个通道提供漏极开路、低电平有效的状态指示输出,MAX5929_L为每个通道提供漏极开路、高电平有效的状态指示输出,MAX5927A状态指示输出的极性可选。

MAX5927A采用32引脚的薄型QFN封装,MAX5929A–MAX5929D采用24引脚QSOP封装,所有器件均工作于-40°C至+85°C扩展级温度范围。
MAX5927A、MAX5929A、MAX5929B、MAX5929C、MAX5929D:典型工作电路 MAX5927A、MAX5929A、MAX5929B、MAX5929C、MAX5929D:典型工作电路 放大+

关键特性

  • 为+1V至+15V之间的任意输入电源(VIN_ ≥ 2.7V)提供安全热插拔
  • 可调节断路器/限流门限,调节范围:25mV至100mV
  • 可配置为跟踪、排序或独立工作模式
  • VariableSpeed/BiLevel断路器响应
  • 内部电荷泵产生N沟道MOSFET的栅极驱动
  • 启动时具有受控的浪涌电流
  • 自动重试或锁存故障管理
  • 可编程欠压闭锁
  • 状态输出指示故障/安全状态

应用

  • 基站线卡
  • 坞站
  • 热插拔子卡
  • 网络交换机、路由器、集线器
  • PCI Express®热插拔
  • 便携式计算机设备
  • 电源排序/跟踪
  • RAID
申请可靠性报告: MAX5927A 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

 
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    • 高灵活性,支持用于众多独特设计
    • 安全特性确保高精度、可靠保护

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    • 高灵活性,支持用于众多独特设计
    • 安全特性确保高精度、可靠保护

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    • 高灵活性,支持用于众多独特设计
    • 安全特性确保高精度、可靠保护

    类型 编号 标题
    参考电路42285通道(3路+V和2路-V)热插拔参考设计