回到顶部

独立的开关模式Li+电池充电器,内置14V开关

紧凑的1节至3节锂离子电池充电器,使用内部功率开关,可提供高达1.5A的电流

产品详情

主要特征

应用/用途

Parametric specs for Battery Chargers
Charging VIN (V) (max) 14
Max. ICHG (A) 1.5
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
2
3
Protected VIN (V) (max) 14
Charger (V) 4 to 13.2
Oper. Temp. (°C) -40 to +85
Package/Pins SSOP/28
Budgetary
Price (See Notes)
8.89
查看更多

简化框图

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

参量

Parametric specs for Battery Chargers
Charging VIN (V) (max) 14
Max. ICHG (A) 1.5
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
2
3
Protected VIN (V) (max) 14
Charger (V) 4 to 13.2
Oper. Temp. (°C) -40 to +85
Package/Pins SSOP/28
Budgetary
Price (See Notes)
8.89

主要特征

  • Stand-Alone Charger Safely Charges Up to Three Li+ Batteries
    • Continuous Voltage and Temperature Monitoring
    • Input Current Limiting
    • ±0.8% Battery Regulation Voltage Accuracy
    • Up to 1.5A Programmable Charge Current
  • Low Power Consumption Extends Battery Life
    • 0.1µA Shutdown Battery Current
    • Low-Dropout 98% Duty Cycle
  • Flexible Input Voltage Range Enables the Use of Low Cost Wall Adapters
    • Input Voltage Up to 14V
    • Precharges Near-Dead Cells
  • Fixed 300kHz PWM Oscillator Allows Effective Noise Filtering
  • 28-Pin SSOP Package Saves Board Space

应用/用途

  • 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
  • PDA

描述

The MAX1757 is a switch-mode lithium-ion (Li+) battery charger that charges one to three 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 MAX1757 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 by automatically reducing battery-charging current prevents overload of the input supply, 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 3 by pin strapping. Battery temperature is monitored by an external thermistor to prevent charging outside the acceptable temperature range.

The MAX1757 is available in a space-saving 28-pin SSOP package. Use the MAX1757EVKIT to help reduce design time. For a stand-alone charger with a 28V switch, refer to the MAX1758 data sheet. For a charger controller capable of up to 4A charging current, refer to the MAX1737 data sheet.

简化框图

MAX1757:典型工作电路 MAX1757:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心