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利盛達科技讓電源設計更便捷可靠|聯系電話：13928434054 |
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利盛達科技讓電源設計更便捷可靠|聯系電話：13928434054 |
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RT9293--TSOT-23-6封裝的白光LEDs升壓驅動器
RT9293概述
RT9293是一款專為白光LED設計的恒流升壓轉換器，這種升壓驅動器允許LEDs串聯，使得LEDs亮度均勻。同時，1.1MHz的高速開關頻率允許外圍器件尺寸更小，1uF的輸入、輸入電容更為節約板上空間。0.25V回饋電壓可以更好的減小外圍檢測電阻上的功耗，進一步提高LEDs驅動系統效率。RT9293內部集成軟啟動電路，顯著降低PWM調光時的音頻噪聲。RT9293采用小尺寸 SOT23-6封裝。
RT9293特點
RT9293 輸入電壓范圍：2.6V~5.5V
RT9293 26V過壓保護
RT9293 高效率：典型值85%
RT9293 片內集成軟啟動
RT9293 PWM亮度調節模式
RT9293 內置30V高壓功率器件
• 1.1MHz開關頻率
RT9293 小尺寸電感、電容
• SOT23-6封裝
RT9293 符合RoHS規范及Pb-Free
RT9293應用
• 移動電話
• 數字相機
• PDA等手持設備
• 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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