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RT9293B,10个LED、TSOT-23封装的白光LEDs升压驱动器

RT9293B】10个LED、TSOT-23封装的白光LEDs升压驱动器

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RT9293B 详细介绍
相关商品: RT9284A-20PJ6 EUP2584 G5126 RT9284 G5921 RT9365 SY7201 TP3915 TP3992 TP3984 TP3919 TP3990 MP1542 EUP2539

RT9293B--TSOT-23封装的白光LEDs升压驱动器
RT9293B概述
RT9293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。RT9293内部集成软启动电路,显著降低PWM调光时的音频噪声。RT9293采用小尺寸 SOT23-6封装。


RT9293B特点
•  输入电压范围:2.6V~5.5V
•  26V过压保护
•  高效率:典型值85%
•  片内集成软启动
•  PWM亮度调节模式
•  内置30V高压功率器件
•  1.1MHz开关频率
•  小尺寸电感、电容
•  SOT23-6封装
•  符合RoHS规范及Pb-Free


RT9293B应用
•  移动电话
•  数字相机
•  PDA等手持设备
•  MP3播放器
•  GPS接收器
 

RT9293BGeneral Description

The RT9293B is a high frequency, asynchronous boost converter. The internal MOSFET can support up to 10 White LEDs for backlighting and OLED power application, and the internal soft start function can reduce the inrush current. The device operates with 1-MHz fixed switching frequency to allow small external components and to simplify possible EMI problems. For the protection, the RT9293A provides 50V OVP and the RT9293B provides 50V/20V OVP to allow inexpensive and small-output capacitors with lower voltage ratings. The LED current is initially set with the external sense resistor RSET. The RT9293 is available in the tiny package type TSOT-23-6 and WDFN-8L 2x2 packages to provide the best solution for PCB space saving and total BOM cost.

 RT9293B Ordering Info


Note :
Richtek Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

 RT9293B Features

• VIN Operating Range : 2.5V to 5.5V
• Internal Power N-MOSFET Switch
• Wide Range for PWM Dimming (100Hz to200kHz)
• Minimize the External Component Counts
• Internal Soft Start
• Internal Compensation
• Under Voltage Protection
• Over Voltage Protection
• Over Temperature Protection
• Small TSOT-23-6 and 8-Lead WDFN Packages
• RoHS Compliant and Halogen Free

 RT9293B Application

• Cellular Phones
• Digital Cameras
• PDAs and Smart Phones and MP3 and OLED.
• Portable Instruments

 RT9293B Pin Configurations

(TOP VIEW)


TSOT-23-6


WDFN-8L 2x2

 RT9293B  Typical Applications Circuit


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