典型應(yīng)用顯示帶有輸入開關(guān)的升壓配置,以防止 A8518 LED
驅(qū)動器的 VOUT 至 GND 短路。 A8518 是一款用于小尺寸 LCD 背光的多輸出 LED 驅(qū)動器。它集成了一個
電流模式升壓
轉(zhuǎn)換器、內(nèi)部
電源開關(guān)和兩個電流吸收器。該升壓轉(zhuǎn)換器可在 200 mA 電流下驅(qū)動多達 22 個白光 LED,每串 11 個 LED。 LED 接收器可以
并聯(lián)在一起,以實現(xiàn)高達 400 mA 的更高 LED 電流。 A8518 采用 4.5 至 40 V 的單電源供電
說明
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Typical Application Showing Boost Configuration with Input Switch to Protect Against VOUT-to-GND Short for A8518 LED Driver. The A8518 is a multi-output LED driver for small-size LCD backlighting. It integrates a current-mode boost converter with internal power switch and two current sinks. The boost converter can drive up to 22 white LEDs, 11 LEDs per string, at 200 mA. The LED sinks can be paralleled together to achieve higher LED currents up to 400 mA. The A8518 operates from a single power supply from 4.5 to 40 V