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RT9427 是作为微处理器外设而存在的锂离子/聚合物电池电量计，可为其提供单节电池包的电量信息，一般安装在系统主板上对可移除或不可移除的电池进行管理。</br>RT9427 采用带有电流补偿的 Voltaic Gauge 算法，通过电池两极之间的电压差和开路电压对电池荷电状态（SOC）的增减进行计算再加上电流信息进行补偿来得到 SOC，可报告电池的荷电状态（StateOfCharge）、健康状态（StateOfHealth）、充满容量（FullChargeCapacity）、耗尽时间（TimeToEmpty）和使用循环数（CycleCount）等信息。</br>电流补偿的 Voltaic Gauge 算法得到的 SOC 信息是平滑变化的，不存在时间和电流导致的累计误差，相比饱受电流检测误差和电池自放电导致误差之苦的库仑计算法具有优势。</br>RT9427 能对电池状态进行全面监控，同时具有中断报警功能，能在电池出现过压、欠压、过热、过流等状态时向系统处理器发出警告信息。在高充电速率的应用中，它所采用的开尔文连接能消除 IR 压差所导致的电池电压测量误差，优化充电过程，提高安全性。
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<li class="mv5"> Support System-Side Fuel Gauging<br /> </li><li class="mv5"> Battery Fuel Gauge for 1-Series (1sXp) Li-Ion/Li-Polymer Applications<br /> </li><li class="mv5"> State of Charge (SOC) Calculated by VoltaicGauge with Current Sensing (VGCS)<br /> </li><li class="mv5"> No Accumulation Error on Capacity Calculation<br /> </li><li class="mv5"> Battery SOC, SOH, FCC, TTE, and Cycle Count Report<br /> </li><li class="mv5"> Ultra-Low Power Consumption: 5μA<br /> </li><li class="mv5"> Voltage Measurement: ±5mV<br /> </li><li class="mv5"> Current Measurement: ±0.5%<br /> </li><li class="mv5"> Battery Temperature Measurement: ±1°C (TA = 0°C to 45°C)<br /> </li><li class="mv5"> Battery Monitoring with Alert Indicators for Voltage, Current, Temperature, SOC and Presence <br /> </li><li class="mv5"> High C-Rate Battery Charging Compliance<br /> </li><li class="mv5"> Voltage Kelvin-Sense Connection for WDFN Package<br /> </li><li class="mv5"> Low-Value Sense Resistor (0.5mΩ to 40mΩ, Typical 10mΩ)<br /> </li><li class="mv5"> 9-Bump WL-CSP Package with 0.5mm Pitch<br /> </li><li class="mv5"> 10 Pin WDFN Package with 0.4mm Pitch<br /> </li><li class="mv5"> I<sup>2</sup>C Controlled Interface with 1.2V and 1.8V IO Compatible</li>
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<li class="mv5"> Smartphones<br /> </li><li class="mv5"> Tablet PCs<br /> </li><li class="mv5"> Wearable Devices<br /> </li><li class="mv5"> Digital Still Cameras<br /> </li><li class="mv5"> Digital Video Cameras<br /> </li><li class="mv5"> Handheld and Portable Applications</li>
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