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MAX1645B

MAX1645B

高级、与化学类型无关的Level 2电池充电器，带有输入限流

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概述

说明

MAX1645B是一款高效的电池充电器，能够对任何一种化学成分的电池进行充电。它通过Intel系统管理总线(SMBus™)控制电压和充电电流输出。

当为锂离子(Li+)电池充电时，MAX1645B可自动地从恒流充电转换到恒压充电。MAX1645B还可以限制输入电流，使其不超过预先确定的直流电源电流。175s的安全充电定时器能够在MAX1645B应该停止接受充电电压/电流指令时处于“失控充电”状态。

MAX1645B使用了新一代同步buck控制电路，允许占空比超过99%，使输入与输出之间的压差降到最小。MAX1645B能够轻松的为1至4节串联Li+电池充电。
MAX1645B：典型工作电路 MAX1645B：典型工作电路 放大+

关键特性

  • 输入电流限制
  • 175s的安全充电超时
  • 128mA唤醒充电
  • 可以为各种化学类型电池充电：Li+、NiCd、NiMH、铅酸电池等
  • 内部带有SMBus 2线串行接口
  • 符合2级智能电池充电器规范版本1.0
  • +8V至+28V的输入电压范围
  • 高至18.4V的电池电压
  • 11位电池电压设置
  • ±0.8%的输出电压精度，内置基准
  • 3A (最大)电池充电电流
  • 6位充电电流设置
  • 低压差工作时，占空比可达99.99% (最大)
  • 负载/电源切换驱动
  • >97%的效率

应用

  • 笔记本电脑
  • 个人数字助理
  • 销售终端机(POS)

参数规格


Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

设计资源


MAX1645BEVKIT: MAX1645B评估板/评估系统
MAX1645BEVSYS: MAX1645B评估板/评估系统

质量与环境

申请可靠性报告: MAX1645B 
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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参考设计