RT9293裕鼎祥咨询电话：139 2843 4054
RT9293--TSOT-23-6封装的白光LEDs升压驱动器
RT9293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。
RT9293特点
RT9293 输入电压范围：2.6V~5.5V
RT9293 26V过压保护
RT9293 高效率：典型值85%
RT9293 片内集成软启动
RT9293 PWM亮度调节模式
RT9293 内置30V高压功率器件
• 1.1MHz开关频率
RT9293 小尺寸电感、电容
• SOT23-6封装
RT9293 符合RoHS规范及Pb-Free
RT9293应用
• 移动电话
• 数字相机
• PDA等手持设备
• MP3播放器
• GPS接收器
| RT9293General Description |
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The RT9293 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. |
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RT9293 Ordering Info |
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Note : |
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RT9293 Features |
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• 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 |
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RT9293 Application |
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• Cellular Phones
• Digital Cameras • PDAs and Smart Phones and MP3 and OLED. • Portable Instruments |
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RT9293 Pin Configurations |
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(TOP VIEW)
WDFN-8L 2x2 |
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RT9293 Typical Applications Circuit |
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