MAX1758:独立的开关模式Li+电池充电器,内置28V开关

The MAX1758 is a switch-mode lithium-ion (Li+) battery charger that charges one-to-four cells. It provides a regulated charging current accurate to ±10% and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The internal high-side switch delivers a programmable current of up to 1.5A to charge the battery. The built-in safety timer automatically terminates charging once the adjustable time limit has been reached. The MAX1758 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 (charging + system), and automatically reduces battery-charging current, preventing overload of the input supply and allowing the use of a low-cost wall adapter. The per-cell battery regulation voltage is set between 4.0V and 4.4V using standard 1% resistors. The number of cells is set from 1-to-4 by pin strapping. Battery temperature is monitored by an external thermistor to prevent charging outside the acceptable temperature range. The MAX1758 is available in a space-saving 28-pin SSOP package. Use the MAX1758EVKIT to help reduce design time. For a stand-alone charger with a 14V switch, refer to the MAX1757 data sheet. For a charger controller capable of up to 4A charging current, refer to the MAX1737 data sheet.

关键特性
  • Stand-Alone Charger for Up to 4 Li+ Batteries
  • ±0.8% Battery Regulation Voltage Accuracy
  • Low-Dropout 98% Duty Cycle
  • Safely Precharges Near-Dead Cells
  • Continuous Voltage and Temperature Monitoring
  • 0.1µA Shutdown Battery Current
  • Input Voltage Up to 28V
  • Up to 1.5A Programmable Charge Current
  • Safety Timer Prevents Overcharging
  • Input Current Limiting
  • Space-Saving 28-Pin SSOP
  • 300kHz PWM Oscillator Reduces Noise
功能框图
MAX1758:典型工作电路
产品应用
  • 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
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
MAX17582828Resistor1.5TimerSwitchmode-40 to +85
SSOP/28
$3.53 @1k
数据手册DataSheet
英文MAX1758.pdfRev 1; 02/2001
开发工具
技术资料
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1758EAI最后一次购买MAX1758EAI+SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:否
MAX1758EAI+生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1758EAI+T生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1758EAI-T停止供货MAX1758EAI+TSSOP;28引脚-40°C至+85°C参考数据资料
MAX1758.pdf MAX1758
MAX1758.pdf MAX1758
MAX1758.pdf MAX1758
Efficiency Improvement in Battery Mode - MAX1737, MAX1757, MAX1758 MAX1758
MAX1758.pdf MAX1758
MAX1758.pdf MAX1758