MAX1640 - 可调输出、开关模式电流源，内置同步整流

MAX1640是Maxim美信半导体公司的一款电池管理产品，MAX1640是可调输出、开关模式电流源，内置同步整流，本站介绍了MAX1640的封装应用图解、特点和优点、功能等，并给出了与MAX1640相关的Maxim元器件型号供参考。

MAX1640 - 可调输出、开关模式电流源，内置同步整流 - 电池管理 - 高精度电流源，快速充电时仍可保持低温状态 - 美信半导体

产品概述

The MAX1640/MAX1641 CMOS, adjustable-output, switch-mode current sources operate from a +5.5V to +26V input, and are ideal for microprocessor-controlled battery chargers. Charging current, maximum output voltage, and pulse-trickle charge are programmed with external resistors. Programming the off-time modifies the switching frequency, suppressing undesirable harmonics in noise-sensitive circuits. The MAX1640's high-side current sensing allows the load to connect directly to ground, eliminating ground-potential errors. The MAX1641 incorporates a low-side current sense.

The MAX1640/MAX1641 step-down pulse-width-modulation (PWM) controllers use an external P-channel MOSFET switch and an optional, external N-channel MOSFET synchronous rectifier for increased efficiency. An internal low-dropout linear regulator provides power for the internal reference and circuitry as well as the gate drive for the N-channel synchronous rectifier.

The MAX1640/MAX1641 are available in space-saving, 16-pin narrow QSOP packages.

关键特性

以下关键特性由Maxim美信半导体提供：

95% Efficiency

+5.5V to +26V Input Supply Range

2V to 24V Adjustable-Output Voltage Range

100% Maximum Duty Cycle (Low Dropout)

Up to 500kHz PWM Operation

Optional Synchronous Rectifier

16-Pin QSOP Package

Current-Sense Accuracy:

2% (MAX1641)

5.3% (MAX1640)

热门应用

备用电池充电器

电池供电应用

蜂窝电话

无绳电话

手持终端

笔记本电脑、笔记本电脑与掌上电脑

PCS电话

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