MAX1757 - 独立的开关模式Li+电池充电器，内置14V开关

MAX1757是Maxim美信半导体公司的一款电池管理产品，MAX1757是独立的开关模式Li+电池充电器，内置14V开关，本站介绍了MAX1757的封装应用图解、特点和优点、功能等，并给出了与MAX1757相关的Maxim元器件型号供参考。

MAX1757 - 独立的开关模式Li+电池充电器，内置14V开关 - 电池管理 - 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 - 美信半导体

产品概述

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.

关键特性

以下关键特性由Maxim美信半导体提供：

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

热门应用

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

PDA

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