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Product Spec Banner
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RT9458 是一款適用於可攜式設備的單節鋰離子/鋰聚合物電池開關式充電器。產品整合同步 PWM 控制器、功率 MOSFET、輸入電流感測電路、高精度電壓調節電路及充電終止電路，並支援 USB OTG（On-The-Go）功能。 RT9458 透過多階段充電控制演算法最佳化充電流程，可根據不同充電狀態自動切換至預充電模式（Pre-Charge Mode）、快速充電模式（Fast Charge Mode）及定電壓模式（Constant Voltage Mode）。主要充電參數可透過 I²C 介面進行設定。當電池電壓低於內部設定門檻時，RT9458 會自動恢復充電循環；當輸入電源移除時，則自動進入睡眠模式，以降低功耗。 此外，RT9458 還具備欠壓保護（UVP）、過壓保護（OVP）、熱調節（Thermal Regulation）及反向漏電保護（Reverse Leakage Protection）等功能，以提升系統可靠性與安全性。 RT9458 採用小型 WL-CSP-20B（2.1mm × 1.87mm，BSC）封裝。 建議接面溫度範圍為 -40°C 至 125°C，環境溫度範圍為 -40°C 至 85°C。
RT9458 電路圖
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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 訂購資訊
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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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