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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

MAX1758：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

关键参数

开发工具

• MAX1757EVKIT
• MAX1758EVKIT

技术资料

• Efficiency Improvement in Battery Mode - MAX1737, MAX1757, MAX1758

质量和环境数据

• MAX1758.pdf

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