MAX8688

带有PMBus接口的数字电源控制器/监测器

可完备控制/监控任何电源,带有PMBus接口


点击查看特定型号的库存状况。

说明

MAX8688是完全集成的数字电源控制和监控IC,可与任何现有的POL (负载点)电源一起工作,提供完整的数字编程。MAX8688可与基准输入、反馈节点以及输入使能连接,控制POL提供跟踪、排序、裕量调节以及动态控制输出电压等功能。

MAX8688具有一路高精度的12位模/数转换器(ADC)和两个差分放大器,用于精确监测电压和电流。内部集成12位数/模转换器(DAC)用于电源裕量调节,并可在全温范围内以0.2%的精度通过闭环系统动态调节输出电压。内部温度传感器提供附加的系统监测。

用户可编程寄存器提供灵活、精确的事件控制,例如:延迟时间和过渡时间、监测过压、欠压、过流、反向电流、过热故障,并可相应地处理报警。可编程闭环工作状态,确保MAX8688与任何现有的POL协同工作,提供精确控制和裕量调节。

MAX8688工作在PMBus™兼容通信协议。可以按照该协议或从Maxim网站下载(GUI)对器件进行编程,可大大加快开发进程。完成配置后,结果可以在上电时通过PMBus总线保存到EEPROM或装载到器件内。因此,可以利用MAX8688远程配置任何POL,省去了昂贵的调用或现场服务器。借助这一精确的电流测量和高分辨率电压控制解决方案,能够实现模块分流。MAX8688具有127个不同的地址设置,支持大规模系统的协调工作。MAX8688采用节省空间的24引脚、4mm x 4mm、无铅TQFN封装。
MAX8688:典型工作电路 MAX8688:典型工作电路 放大+

关键特性

  • PMBus接口用于编程、监控、上下排序以及精确的输出电压控制
  • 能够以0.2%的精度控制输出电压,在输入、负载和温度变化是保持输出稳定
  • 采用可调节的监控频率监测输出电压、输出电流和温度
  • 可以选择以2.6%精度测量电流或温度补偿
  • 可编程软启动和软停止斜率
  • 能够通过地址引脚硬件设置控制最多26路电源电压,也可以通过软件设置地址控制最多127个POL
  • 可以连接POL电源的REFIN和FB端
  • 能够在过压、欠压、过流、电流反向以及过热故障下有效保护POL,可以选择空操作、闭锁和重试(打嗝)
  • 漏极开路/FLT用于故障报警
  • 主从时钟选项可以省去外部时钟,并提供精确定时参考
  • 外部EEPROM接口用于上电时自动设置

应用

  • DC-DC模块和POL
  • 高可靠性的基础架构设备
  • 服务器
  • 电信网络

MAX8654EVKIT: MAX8654和MAX8688评估板
MAX8655EVKIT: MAX8655和MAX8688评估板
产品可靠性报告: MAX8688.pdf 
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。

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