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RT9478M 是一款 4 开关双向升降压 Narrow Voltage DC (NVDC) 充电控制器，设计用于从宽范围 DC 电源为 2 至 4 串电池充电，这些电源包括 USB-C Power Delivery (PD) 电源、传统 AC-DC 充电器适配器与移动电源。此器件的 SMBus 串行通信接口可灵活设置各种参数，包括充电电流、充电电压，以及影响输入、电池与系统输出的过压与欠压状况保护阈值。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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<li class="mv5"> Programmable Frequency: 720kHz/800kHz/1.2MHz<br /> </li><li class="mv5"> Wide Input Voltage Range from 3.8V to 24V<br /> - Average Input Current Regulation (AICR)<br /> - Minimum Input Voltage Regulation (MIVR)<br /> </li><li class="mv5"> Support 10mΩ and 5mΩ Sensing Resister <br /> </li><li class="mv5"> High Accuracy for 2% Battery Charge Current and 0.5% Voltage Regulation<br /> </li><li class="mv5"> Wide Battery Regulation Voltage Range from 5V to 19.2V<br /> </li><li class="mv5"> Support USB On-The-Go (OTG)<br /> </li><li class="mv5"> 5V NMOSFET Gate Driver<br /> </li><li class="mv5"> 8-Bit A/D Converter for Monitor Functions<br /> - Input, System and Battery Voltage<br /> - Input and Battery Current<br /> - System Power<br /> - Independent Comparator Input Voltage<br /> - Input (IBUS) and Battery (IBAT) Current<br /> </li><li class="mv5"> Low Battery Quiescent Current<br /> </li><li class="mv5"> Programmable System Overvoltage Protection<br /> </li><li class="mv5"> Protection<br /> - Input, System and Battery Overvoltage<br /> - System Undervoltage Protection<br /> - Input and Battery Overcurrent Protection<br /> - Over-Temperature Protection<br /> </li><li class="mv5"> SMBus Compliant Serial Communication</li>
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<li class="mv5"> Drones<br /> </li><li class="mv5"> Portable Speakers<br /> </li><li class="mv5"> Portable Devices and Accessories</li>
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