MAX1772:低成本、多种化学类型电池充电器电路

精度为0.7%的输入限流、多化学类型电池充电器,提供完备的解决方案

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification. Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter. The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.

关键特性
  • Input Current Limiting
  • ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C)
  • Programmable Battery Charge Current >4A
  • Analog Inputs Control Charge Current and Charge Voltage
  • Monitor Outputs for:
    • Current Drawn from AC Input Source
    • Charging Current
    • AC Adapter Present
  • Up to 18.2V (max) Battery Voltage
  • 8V to 28V Input Voltage
  • >95% Efficiency
  • 99.99% (max) Duty Cycle for Low-Dropout Operation
  • Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
MAX1772:引脚配置
MAX1772:引脚配置
应用
  • 手持式终端
  • 笔记本电脑和亚笔记本电脑
  • PDA及其它手持设备
数据手册DataSheet
语言下载文件备注
英文MAX1772.pdfRev 4; 03/2009
关键参数
Part NumberProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX17722828
  • Analog Input
  • Resistor
4External ControlSwitchmode-40 to +85QSOP/28$6.22 @1k
开发工具
技术资料
质量和环境数据
相关产品
  • MAX1645A:高级、与化学类型无关的Level 2电池充电器,带有输入限流
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1772EEI停止供货MAX1772EEI+QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:否
MAX1772EEI+生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1772EEI+T生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1772EEI-T停止供货MAX1772EEI+TQSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:否
MAX1772.pdf MAX1772
MAX1772.pdf MAX1772
MAX1772.pdf MAX1772
Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient MAX1772
Battery Chargers Fulfill System Power Requirements and Charge Batteries MAX1772
MAX1772.pdf MAX1772
MAX1772.pdf MAX1772