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MAX系列MAX1894芯片概述及IC解密

    在MAX系列单片机解密技术研究领域,深圳芯片解密研究所长期以来以自身雄厚的技术研发能力和极具特色的服务模式为广大客户提供了众多MAX单片机解密、IC解密技术服务,我们依靠出色的技术解决方案和极具竞争优势的解密价格,广受客户好评。

    MAX1894芯片解密时深圳芯片解密研究所在MAX系列IC解密研究中成功破解的典型芯片型号,针对该芯片,我们解密周期短、价格低、可靠性强。这里,我们将针对MAX1894芯片的主要技术特征做简单介绍,供大家参考借鉴。
   The MAX1894/MAX1924 are lithium-ion/lithium-polymer(Li+) battery-pack protector ICs for 3- or 4-series Li+ battery packs. The MAX1894/MAX1924 enhance the useful operating life of Li+ batteries by monitoring individual cell voltages and preventing over/undervoltage conditions.The MAX1894/MAX1924 also protect the battery pack against charge current, discharge current, and pack- short fault conditions.
   In case of a fault condition, on-board drivers control external P-channel MOSFETs, which disconnect the cells from the pack external terminals. The external protection MOSFETs are connected in a common-source configuration that does not require external pullup resistors. The MAX1894/MAX1924 use only one current-sense resistor to achieve the protection features. All protection thresholds and delays do not require any external components and are trimmed at the factory.
   If any cell voltage drops below the undervoltage threshold, the MAX1894/MAX1924 disconnect the pack from the load and power down to prevent deep discharge of the pack. The MAX1894/MAX1924 offer a trickle-charge feature, which provides a low-current path to safely charge a deeply discharged pack. The MAX1894/MAX1924 also have two logic-level inputs, which can be used by a microcontroller to disable the protection MOSFETs and to put the device in shutdown. The MAX1894/MAX1924 have low quiescent current (30?A typ) and ultra-low shutdown current (0.8?A typ) to prevent deep-cell discharge.
   The MAX1894X is designed for 4-series battery packs,without hysteresis on the protection thresholds. The MAX1924V and MAX1924X include hysteresis for the 3-and 4-series packs, respectively.
Features
o Protect Against Cell Overvoltage
 Factory Programmable Limits from 4V to 4.4V
 Accurate to ±0.5%
o Protect Against Cell Undervoltage
 Factory Programmable Limits from 2V to 3.2V
 Accurate to ±2.0%
o Protect Against Charge, Discharge, and Pack-Short Current Faults
o Automatically Trickle Charges Deeply Discharged Cells
o Fully Integrated MOSFET Drivers Do Not Require Pullup Resistors
o 0.8?A (typ) Shutdown Supply Current Prevents
 Deep Discharge of Cells
o 30?A (typ) Operating Supply Current
o 28V (max) Input Voltage
o Available in Small 16-Pin QSOP Package
   在单片机解密过程中,对单片机本身性能特征及其加密特性与内部结构有一定的了解,能够更好的理解单片机加解密原理,选择更合适的解密方案。以上MAX1894单片机的主要性能特征介绍,供广大客户与工程师参考借鉴。欢迎有MAX1894解密等MAX芯片解密需求者与深圳芯片解密研究所联系。
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