MAX1737:独立的开关模式锂离子电池充电控制器

The MAX1737 is a switch-mode lithium-ion (Li+) battery charger that charges one to four cells. It provides a regulated charging current and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The external N-channel switch and synchronous rectifier provide high efficiency over a wide input voltage range. A built-in safety timer automatically terminates charging once the adjustable time limit has been reached. The MAX1737 regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. An additional control loop monitors the total current drawn from the input source to prevent overload of the input supply, allowing the use of a low-cost wall adapter. The per-cell battery voltage regulation limit is set between +4.0V and +4.4V and can be set from one to four by pin strapping. Battery temperature is monitored by an external thermistor to prevent charging if the battery temperature is outside the acceptable range. The MAX1737 is available in a space-saving 28-pin QSOP package. Use the evaluation kit (MAX1737EVKIT) to help reduce design time.

关键特性
  • Stand-Alone Charger for Up to Four Li+ Cells
  • ±0.8% Accurate Battery Regulation Voltage
  • Low Dropout: 98% Duty Cycle
  • Safely Precharges Near-Dead Cells
  • Continuous Voltage and Temperature Monitoring
  • < 1µA Shutdown Battery Current
  • Input Voltage Up to +28V
  • Safety Timer Prevents Overcharging
  • Input Current Limiting
  • Space-Saving 28-Pin QSOP
  • 300kHz PWM Oscillator Reduces Noise
  • 90% Conversion Efficiency
MAX1737:典型工作电路
MAX1737:典型工作电路
应用
  • 台式摇篮架充电器
  • 手持式仪表(PDA、掌上电脑)
  • Li+电池组
  • 笔记本电脑
数据手册DataSheet
语言下载文件备注
英文MAX1737.pdfRev 4; 09/2007
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
MAX17372828Resistor4TimerSwitchmode-40 to +85QSOP/28$2.86 @1k
开发工具
技术资料
质量和环境数据
相关产品
  • MAX745:开关模式锂离子电池充电器
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1737EEI停止供货MAX1737EEI+QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:否
MAX1737EEI+生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1737EEI+T生产中QSOP,;28引脚;61.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1737EEI-T停止供货MAX1737EEI+TQSOP;28引脚-40°C至+85°C参考数据资料
MAX1737.pdf MAX1737
MAX1737.pdf MAX1737
MAX1737.pdf MAX1737
Efficiency Improvement in Battery Mode - MAX1737, MAX1757, MAX1758 MAX1758
Charging Lithium Batteries with a Nonstandard Termination Voltage MAX4163
Understanding Li+ Battery Operation Lessens Charging Safety Concerns MAX1873
Improving Accuracy of the MAX1737 Lithium-Ion Battery Charger MAX1737
Reduce Component Count and Cut Costs by Disabling the MAX1737 Source-Current Loop MAX1737
Switch-Mode, Linear, and Pulse Charging Techniques for Li+ Battery in Mobile Phones and PDAs MAX1898
MAX1737.pdf MAX1737
MAX1737.pdf MAX1737