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Product Spec Banner
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RT4527A 是一款高效率白光 LED 驱动器，适用于单节或双节电池供电系统，可驱动由六组并联 LED 串所组成的背光模组，每串最多可支援 10 颗白光 LED（WLED）。内建电流汲入器（Current Sink）可提供最高 ±2% 的通道间电流误差，确保各 LED 串之间具有优异的亮度一致性。 为了提供电流汲入器足够的工作余裕（Headroom），升压控制器会监测各回授脚位中的最低电压，并自动调整至最佳输出电压，以提升整体电源转换效率。 RT4527A 内建 I²C 介面，可用于控制调光模式、开关频率及 LED 驱动电流。产品整合 250mΩ、耐压 36V 的功率开关，并采用电流模式控制架构，提供过电流保护功能。 RT4527A 的开关频率可于 100kHz 至 1.6MHz 范围内调整，让设计人员可依效率需求与外部元件尺寸之间进行最佳化取舍。 RT4527A 采用 WQFN-20L 3.5mm × 3.5mm 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。
RT4527A 电路图
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<div class="spec-list"><ul class="lv1"><li>Wide Operating Input Voltage: 2.7V to 24V </li><li>High Output Voltage: Up to 36V </li><li>Channel Current Programmable: 6mA to 25mA </li><li>Channel Current Regulation with Accuracy ±3% and Matching ±2% </li><li>Dimming Controls <ul class="lv2"> <li></li><li>Direct PWM up to 25kHz with Minimum 1% Duty </li><li>PWM to Analog up to 2kHz with 12-Bit Resolution, up to 4kHz with 11-Bit Resolution, up to 8kHz with 10-Bit Resolution </li><li>PWM to Mixed up to 2kHz with 12-Bit Resolution, up to 4kHz with 11-Bit Resolution </li><li>PWM to Mixed-26kHz up to 2kHz with 12-Bit Resolution, 4kHz with 11-Bit Resolution, up to 8kHz with10-Bit Resolution </li></ul> </li><li>I<sup>2</sup>C Programs LED Current, Switching Frequency, Dimming Mode </li><li>Switching Frequency: 100kHz to 1.6 MHz </li><li>Embedded Memory with MTP </li><li>Protections <ul class="lv2"> <li></li><li>LED String Open Protection </li><li>Overcurrent Protection </li><li>Programmable Overvoltage Protection </li><li>Over-Temperature Protection </li><li>String Short Detection </li></ul> </li></ul></div>
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RT4527A 订购信息
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RT4527A
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RT4527A
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<div class="spec-list"><ul class="lv1"><li>Tablet and Notebook LED Backlights </li></ul></div>
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