RT9284A裕鼎祥咨询电话：139 2843 4054
RT9284A 概述
RT9284A 采用TSOT-23-5和TSOT-23-6封装。RT9284A 为100Hz~100KHz微控频率升压型白光LED驱动电路，可同时驱动4颗串联白光LED，能完全避免噪音产生。RT9284A 在白光LED出现异常情况下，具有过电压保护功能。 RT9284A 是一款专为白光LED设计的恒流升压转换器，这种升压驱动器允许LEDs串联，使得LEDs亮度均匀。同时，1.1MHz的高速开关频率允许外围器件尺寸更小，1uF的输入、输入电容更为节约板上空间。0.25V回馈电压可以更好的减小外围检测电阻上的功耗，进一步提高LEDs驱动系统效率。RT9284A 内部集成软启动电路，显著降低PWM调光时的音频噪声。RT9284A 采用小尺寸 SOT23-6封装。
RT9284A 特点
• RT9284A 输入电压范围：2.6V~5.5V
• RT9284A 26V过压保护
• RT9284A 高效率：典型值85%
• RT9284A 内集成软启动
• RT9284A PWM亮度调节模式
• RT9284A 内置30V高压功率器件
• RT9284A 1.1MHz开关频率
• RT9284A 小尺寸电感、电容
• SOT23-6封装
• RT9284A 符合RoHS规范及Pb-Free
RT9284A 应用
• 移动电话
• 数字相机
• PDA等手持设备
• MP3播放器
• GPS接收器
The RT9284A /B is a compact, high efficient and high integration LED driver. Internal 22V MOSFET can support 2 to 5 White LEDs for backlighting and camera flashing.Highly integration and internal compensation network minimizes as 5 external component counts. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. The RT9284A Internal soft start function can reduce the inrush current. Tiny package type of TSOT-23-5 and TSOT-23-6 packages provide the best solution for PCB space saving and total BOM cost.
RT9284A Features
·VIN Operating Range : 2.7V to 5.5V
·Maximum Output Voltage up to 20V
·Dimming with Zero-inrush and Wide Frequency Range of 100 to 100kHz
·Over Voltage Protection
·Output Current up to 100mA at VOUT = 12V.
·Zero Shutdown Supply Current
·Minimize the External Component
·Small LC Filter
·Internal Soft Start
·RoHS Compliant and 100% Lead (Pb)-Free
RT9284A Applications
·Camera Flash White LED
·Mobile Phone, Smart Phone LED Backlight
·PDA LED Backlight
·Digital Still Camera
·Camcorder
