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Product Spec Banner
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RT4532 是一款高效率 LED 驱动器，专为背光应用设计。产品内建非同步升压转换器及萧特基二极体，搭配电流源驱动架构，可支援每个通道最多 6 颗 LED，输入电压范围涵盖 2.5V 至 5.5V，适用于多种可携式装置背光系统。 RT4532 内建 I²C 介面，支援快速模式与高速模式通讯，可方便地进行背光控制。产品提供 256 阶线性亮度调整功能，可精细设定背光 LED 亮度，同时也支援 PWM 调光方式，提供更灵活的亮度控制能力。 为了提升系统可靠性，RT4532 内建完整保护机制，包括输入欠压锁定保护、过电流保护、输出过压保护及过温保护。输出过压保护门槛可依应用需求设定为 16V 或 24V，以满足不同背光模组设计要求。 RT4532 采用 WL-CSP-10B 0.87mm × 2.07mm 封装，可有效节省电路板空间，非常适合轻薄型可携式产品应用。
RT4532 电路图
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range : 2.5V to 5.5V </li><li>Internal Schottky Diode </li><li>Fast-speed mode I<sup>2</sup>C Compatible Interface </li><li>Drive Up to 6 WLEDs in 4 String </li><li>External PWM Brightness Control </li><li>550k/1.1MHz Switching Frequency </li><li>Built-in Internal Soft-Start </li><li>I<sup>2</sup>C Programmable 256 Steps Linear Current Regulation </li><li>Up to 85% Efficiency with Small Magnetics </li><li>Programmable 16V/24V OVP </li><li>Current Accuracy ±5% and Current Balance ±3% </li><li>UVLO, OVP, OCP, OTP Protection </li><li>Shutdown Current : < 1μA </li><li>Temperature Range : -40°C to 85°C </li></ul></div>
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RT4532 订购信息
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RT4532
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<div class="spec-list"><ul class="lv1"><li>Cellular Phones </li><li>Digital Cameras </li><li>PDAs and Smart Phones </li><li>Portable Instruments </li></ul></div>
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