Four-String White LED Driver

GENERAL DESCRIPTION The ADD5205is a white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. It is designed with a 0.3 Ω internal switch and 1 MHz fixed operating frequency. The ADD5205contains four regulated constant current sources for

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四串白光LED驱动器

ADD5205是一款基于高效率、电流模式、升压转换器技术的白光LED驱动器，适合背光应用。它具有一个0.3 Ω内部开关，固定工作频率为1 MHz。ADD5205内置四个调节恒流源，可实现均匀的亮度。每个电流源可驱动的最高电流为25 mA。\nADD5205有四个并联的LED串，各串包含多个串联LED，电流匹配精度为±2%。该器件提供可调的电流源，使用外部电阻时最高可驱动25 mA的电流。LED电流可通过PWM引脚上的PWM信号输入控制。内部电路使用一个外部电阻将PWM信号转换成模拟信号，并以线性方式控制LED电流。\nADD5205具有多种安全保护特性，防止器件在故障状况下受损。若一个 基于感性升压转换器的白光LED驱动器\n- 输入电压范围：2.8 V 至 18 V\n- 内部补偿\n- 1 MHz固定工作频率\n- 28 V固定过压保护\n- 升压转换器内置软启动功能 \n最多驱动4个 LED电流源\n- 可调LED电流，每个通道最高可达25 mA\n- 内置PWM输入的直流电平亮度控制\n- LED开路故障保护\n通用特性\n- 热关断\n- 欠压闭锁\n- 12引脚、3 mm × 3 mm × 0.75 mm LFCSP封装 ;

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Four-String White LED Driver

GENERAL DESCRIPTION The ADD5205is a white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. It is designed with a 0.3 Ω internal switch and 1 MHz fixed operating frequency. The ADD5205contains four regulated constant current sources for

文件：441.07 Kbytes 页数：16 Pages

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Dual, 35 dB Range, 1 dB Step Size DGA

文件：1.76888 Mbytes 页数：32 Pages

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Dual, 35 dB Range, 1 dB Step Size DGA

FEATURES Dual, independent, digitally controlled gain amplifier (DGA) −9 dB to +26 dB gain range 1 dB step size, ±0.2 dB accuracy at 200 MHz 100 Ω differential input resistance 10 Ω differential output resistance 1.2 dB change in noise figure for first 12 dB of gain reduction Output third-orde

文件：1.36837 Mbytes 页数：31 Pages

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Dual, 35 dB Range, 1 dB Step Size DGA

文件：1.76888 Mbytes 页数：32 Pages

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