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MAX8922L 30V Li+電池線性充電器，提供GSM測

2009-11-16 18:08本站整理 佚名我要評(píng)論（0）我要收藏

MAX8922L 30V Li+電池線性充電器，提供GSM測試模式

概述

The MAX8922L linear battery charger safely charges a single-cell lithium-ion (Li+) battery. Charging rate is optimized to accommodate the thermal characteristics of a given application. There is no need to reduce the maximum charge current at the worst-case charger power dissipation. Charging is optimized for a single Li+ cell using a control algorithm that includes low-battery precharging, voltage and current-limited fast charging, and top-off charging, while continuously monitoring for input overvoltage and device die-temperature conditions. The fast-charge current and top-off current thresholds are programmable by a simple 1-Wire® serial interface. The charger status and valid input power are indicated by two open-drain outputs (active-low CHG and active-low POK).

The fast-charge current is defaulted to 400mA and programmable through the 1-Wire interface (active-low EN/SET). The MAX8922L also can be programmable to GSM test mode through the 1-Wire interface.

The MAX8922L is available in a tiny (3mm x 2mm x 0.8mm) 10-pin TDFN package.

關(guān)鍵特性

  • Overvoltage-Protected 30VDC Rated Input (IN)
  • Input Overvoltage-Protected Safe 4.94V LDO Output
  • 2.3A GSM RF Test Mode
  • No External FET, Blocking Diode, or Sense Resistor Required
  • 1-Wire Easy Programmable Fast-Charge and GSM Test Mode (Active-Low EN/SET)
  • Resistor-Programmable Fast-Charge Current (SETI)
  • Resistor-Programmable Top-Off Current Threshold (MIN)
  • Prequalification Charge
  • Power-OK Monitor Output (Active-Low POK)
  • Charging-Status Output (Active-Low CHG)
  • Die Temperature Regulation for Optimized Charge Rate
  • Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package

    應(yīng)用/使用

  		•  數(shù)碼相機(jī)
  		•  GSM/EDGE/UMTS/CDMA蜂窩電話
  		•  PDA
  		•  便攜式多媒體播放器和MP3播放器
  		•  無線應(yīng)用

    MAX8922L：典型工作電路
    典型工作電路

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