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RT8498

18V, 具調光控制的多架構 LED 驅動器

RT8498
New

RT8498為支援3V~18V寬輸入電壓範圍及輸出電壓可達18V的電流模式LED驅動器。內置350kHz操作頻率，外部PWM電感和輸出/輸入電容的尺寸可最小化。藉由100mV電流感測控制達到高效率。LED調光控制可以經由類比或PWM信號完成。RT8498提供內置軟啟動功能避免衝擊電流和過熱關機以防止設備過熱。
RT8498採用SOT-23-6封裝。

應用

  • GPS, 便攜式DVD背光源
  • 展示燈和室內照明
  • IP攝像機

主要規格

RT8498
Status Active
Vin (min) (V) 3
Vin (max) (V) 18
Vout (max) (V) 18
LED Channels 1
Topology Boost;Buck;Buck-boost
SW Freq (typ) (kHz) 350
Vcs (typ) (mV) 100
Dimming Control Analog;PWM;PWM-to-Analog
Features Current Mode Control;Cycle-by-Cycle Current Limit;OVP
Package Type SOT-26

關鍵特性

  • 高電壓:VIN可達18V, VOUT可達18V

  • 內建2A電源開關

  • 電流模式PWM控制

  • 350kHz固定開關頻率

  • 類比、PWM數位或PWM轉換類比與一個外部的電容

  • 內置軟啟動避免衝擊電流

  • 欠壓鎖定

  • 內置過壓保護以限制輸出電壓

  • 逐週期電流限制

  • 過熱關機

Application Notes

與銷售人員聯繫