MAX846A - 低成本、多种化学类型电池充电控制器

MAX846A是Maxim美信半导体公司的一款电池管理产品，MAX846A是低成本、多种化学类型电池充电控制器，本站介绍了MAX846A的封装应用图解、特点和优点、功能等，并给出了与MAX846A相关的Maxim元器件型号供参考。

MAX846A - 低成本、多种化学类型电池充电控制器 - 电池管理 - 通用充电器，具有低成本µC或独立式Li+电池充电器 - 美信半导体

产品概述

The MAX846A is a cost-saving multichemistry battery-charger system that comes in a space-saving 16-pin QSOP. This integrated system allows different battery chemistries (Li-Ion, NiMH or NiCd cells) to be charged using one circuit.

In its simplest application, the MAX846A is a stand-alone, current-limited float voltage source that charges Li-Ion cells. It can also be paired up with a low-cost microcontroller (µC) to build a universal charger capable of charging Li-Ion, NiMH, and NiCd cells.

An internal 0.5%-accurate reference allows safe charging of Li-Ion cells that require tight voltage accuracy. The voltage- and current-regulation loops used to control a low-cost external PNP transistor (or P-channel MOSFET) are independent of each other, allowing more flexibility in the charging algorithms.

The MAX846A has a built-in 1%, 3.3V, 20mA linear regulator capable of powering the µC and providing a reference for the µC's analog-to-digital converters. An on-board reset notifies the controller upon any unexpected loss of power. The µC can be inexpensive, since its only functions are to monitor the voltage and current and to change the charging algorithms.

关键特性

以下关键特性由Maxim美信半导体提供：

Multichemistry Charger System (Li-Ion, NiMH, NiCd)

Independent Voltage and Current Loops

±0.5% Internal Reference for Li-Ion Cells

Lowers Cost:

Stands Alone or Uses Low-Cost µC

Built-In 1% Linear Regulator Powers µC

Linear Regulator Provides Reference to µC ADCs

Built-In µC Reset

Controls Low-Cost External PNP Transistor or P-Channel MOSFET

Space-Saving 16-Pin QSOP

Charging-Current-Monitor Output

< 1µA Battery Drain when Off

热门应用

蜂窝电话

台式摇篮架充电器

手持式仪表(PDA、掌上电脑)

Li+电池组

Li+/NiMH/NiCd多化学类型电池充电器

笔记本电脑

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