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RT4503/RT4503A

可驅動10只LED的非同步 Boost 轉換器

RT4503/RT4503A
New

RT4503/A 是具備驅動10只串聯 WLED 的高集成度 LED 驅動器，它包括了一個電流模式 Boost 轉換器和 36V/1.2A 的功率開關。RT4503/A 可在 2.5V~5.5V 的輸入電壓範圍內以 550kHz 的工作頻率工作，使用一隻電阻即可設定 LED 電流，回饋電壓為 200mV。調光方面，RT4503A 支持32級脈衝調光法，RT4503 則支援 PWM 調光法，它們都對回饋系統的參考電壓進行調節。

應用

  • 行動電話
  • 數位相機
  • 可擕式設備

主要規格

RT4503 RT4503A
Status Active Active
Vin (min) (V) 2.5 2.5
Vin (max) (V) 5.5 5.5
Vout (max) (V) 36 36
LED Channels 1 1
Topology Boost Boost
SW Freq (typ) (kHz) 550 550
Vcs (typ) (mV) 200 200
Dimming Control PWM Pulse
Features Backlight;Cycle-by-Cycle Current Limit;Enable Input;OVP;UVP Backlight;Cycle-by-Cycle Current Limit;Enable Input;OVP;UVP
Package Type WDFN2x2-6 WDFN2x2-6

關鍵特性

  • 輸入電壓範圍：2.5V~5.5V

  • 36V 開路保護電壓，容許驅動10只 WLED

  • 脈衝調光方式

  • 參考電壓 200mV，精度 ±2%

  • 550kHz 工作頻率

  • 內建軟啟動

  • 過溫保護

  • 內部補償

  • 電流限制

Application Notes

Datasheet

DS4503A-03.pdf

Datasheet

DS4503A-03.pdf

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