MAX1758

独立的开关模式Li+电池充电器,内置28V开关


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说明

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.
MAX1758:典型工作电路 MAX1758:典型工作电路 放大+

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

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

请查看具体的参数规格 Battery Chargers (75)


Part NumberCharging VIN
(V)
Max. ICHG
(A)
Cell Chemistry# Lithium Ion Cells
(max)
MAX1758 281.5
Li-Ion
Li-Polymer
1
2
3
4

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

MAX1757EVKIT: MAX1757、MAX1758评估板
MAX1758EVKIT: MAX1757、MAX1758评估板
产品可靠性报告: MAX1758.pdf 
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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