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RT9427 锂离子 / 锂聚合物电池电量计是一款微控制器外设，可为单节电池组提供电量计量。RT9427 位于系统主板上，并管理不可拆卸电池或可拆卸电池组。<br /><br />RT9427 依据具电流检测的电压式电量计 (VGCS) 算法回报 StateOfCharge、StateOfHealth、FullChargeCapacity、TimeToEmpty 与 CycleCount，通过使用电池电压与 OCV 之间的电压差来计算增加或减少的 SOC，并搭配电流检测补偿以回报电池 SOC。<br /><br />具电流检测的电压式电量计算法可支持平顺的 SOC，且不会随时间与电流累积误差。相较于库仑计数器会因电流检测误差与电池自放电而产生 SOC 漂移，这是一项优势。<br /><br />RT9427 提供完整的电池状态监测，并具备中断警报功能。当电池在充电 / 放电期间发生过压 / 欠压、过温，以及充电 / 放电过电流状况时，它可主动提醒主处理器。对于高 C-rate 电池充电应用尤其适用，因为它可通过 Kelvin 检测连接来测量电池电压，以消除 IR 压降效应，实现最佳充电曲线与安全性。其他实用的警报功能包括低 SOC 警示、SOC 变化与电池存在状态变化。<br /><br />建议结温范围为 −40°C 至 125°C，环境温度范围为 −40°C 至 85°C。
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<div class="spec-list"><ul class="lv1"><li>Support System Side Fuel Gauging </li><li>Battery Fuel Gauge for 1-Series (1sXp) Li-Ion/Li-Polymer Applications </li><li>State of Charge (SOC) Calculated by VoltaicGauge<sup>TM</sup> with Current Sensing (VGCS) </li><li>No Accumulation Error on Capacity Calculation </li><li>Battery SOC, SOH, FCC, TTE and Cycle Count Report </li><li>Ultra Low Power Consumption 5μA </li><li>Voltage Measurement: ±5mV </li><li>Current Measurement: ±1% </li><li>Battery Temperature Measurement: ±1°C </li><li>Battery monitor with alert indicator for Voltage, Current, Temperature, SOC and Presence </li><li>High C-Rate Battery Charging Compliance </li><li>Voltage Kelvin-Sense Connection </li><li>Build-In 8mΩ Sense Resistor </li><li>9 Bump WL-CSP Package with 0.5mm Pitch </li><li>I<sup>2</sup>C Controlled Interface with 1.2V and 1.8V IO Compatible </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Wearable Device </li><li>Handheld and Portable Applications </li><li>Digital Still Cameras </li><li>Digital Video Cameras </li></ul></div>
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