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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。
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