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RT9300A/RT9300B

4通道低壓差定電流源

RT9300A/RT9300B
New

RT9300A/B 是用於替代傳統白光 LED 應用中的電流鎮定電阻的高性能低壓差 LED 驅動器，它使用一隻內部電阻對4只 LED 的電流進行設定，匹配誤差低於5%。與使用電阻進行鎮流相比，RT9300A/B 容許在更寬的供電電壓範圍內獲得更低的電流變化範圍、極低的電壓降，在有的應用中還可獲得效率的最大化。當流過每個 LED 的電流為 20mA/15mA 時，RT9300A/B 僅需 60mV/45mV 的電壓降落空間即可獲得很好的 LED 亮度一致性。

應用

  • Next-Generation Wireless Handsets
  • PDAs, Palmtops, and Handy Terminals
  • Digital Cameras, Camcorders
  • Battery-Powered Equipment

主要規格

RT9300A RT9300B
Status Active Active
Vin (min) (V) 2.5 2.5
Vin (max) (V) 5.5 5.5
Number of LEDs (max) (pcs) 4 4
Iout (max)/channel (mA) 15 20
Dimming Control PWM PWM
Topology Current Source Current Source
Features Enable Input;UVP Enable Input;UVP
Package Type SOT-26 SOT-26

關鍵特性

  • 20/15mA 輸出時的電壓降僅 60/45mV

  • 5% 的 LED 電流一致性

  • 極簡單的 LED 電流控制方法

  • 供電電壓範圍為 2.5V~5.5V

  • 過熱關機保護

  • 符合 RoHS 規範，不含鹵素

Datasheet

DS9300AB-05.pdf

Datasheet

DS9300AB-05.pdf

RT9300AGE
Package Type:SOT-26
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