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Product Spec Banner
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RT9458 是一款适用于可携式设备的单节锂离子/锂聚合物电池开关式充电器。产品整合同步 PWM 控制器、功率 MOSFET、输入电流感测电路、高精度电压调节电路及充电终止电路，并支援 USB OTG（On-The-Go）功能。 RT9458 透过多阶段充电控制演算法最佳化充电流程，可根据不同充电状态自动切换至预充电模式（Pre-Charge Mode）、快速充电模式（Fast Charge Mode）及定电压模式（Constant Voltage Mode）。主要充电参数可透过 I²C 介面进行设定。当电池电压低于内部设定门槛时，RT9458 会自动恢复充电循环；当输入电源移除时，则自动进入睡眠模式，以降低功耗。 此外，RT9458 还具备欠压保护（UVP）、过压保护（OVP）、热调节（Thermal Regulation）及反向漏电保护（Reverse Leakage Protection）等功能，以提升系统可靠性与安全性。 RT9458 采用小型 WL-CSP-20B（2.1mm × 1.87mm，BSC）封装。 建议接面温度范围为 -40°C 至 125°C，环境温度范围为 -40°C 至 85°C。
RT9458 电路图
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<div class="spec-list"><ul class="lv1"><li>Support Quick Start for Charger </li><li>High Accuracy Voltage/Current Regulation </li><li>Input Current Regulation : 100mA/500mA/700mA/1A </li><li>Minimum Input Voltage Regulation : 4.1V to 4.7V Per 0.1V Step </li><li>Charge Voltage Regulation Accuracy : ±1% </li><li>Charge Current Regulation Accuracy : ±5% </li><li>Built-In Input Current Sensing and Limiting </li><li>Integrated Power MOSFETS for up to 1.55A Charge Rate </li><li>Integrated Sensing Resistors for Charging Current Sensing </li><li>Synchronous 1.5MHz Fixed Frequency PWM Controller with up to 95% Duty Cycle </li><li>Reverse Leakage Protection to Prevent Battery Drainage </li><li>Thermal Regulation and Protection </li><li>Over-Temperature Protection </li><li>Input Over-Voltage Protection </li><li>IRQ Output for Communication with I<sup>2</sup>C </li><li>Automatic Charging </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT9458 订购信息
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RT9458
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RT9458
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<div class="spec-list"><ul class="lv1"><li>Cellular Telephones </li><li>Personal Information Appliances </li><li>MP3 Players </li><li>Portable Instruments </li></ul></div>
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