LED驅(qū)動器應(yīng)用,可調(diào)整關(guān)斷時間,源250mA/沉500mA峰值驅(qū)動能力, 25°C時的電流檢測精度±3.2%,3.3V電平調(diào)光輸入,具有熱關(guān)斷,過流保護(hù)和最大開態(tài)時間保護(hù),主要用于LCD屏的LED背光驅(qū)動器,LED條燈,LED街燈和LED燈泡.本文介紹了NCL30051主要特性,方框圖, 典型應(yīng)用電路圖, 輸入80V 350mA輸出的降壓LED驅(qū)動器評估板NCL30105GEVB電路圖,材料清單和PCB布局圖.

NCL30051主要特性:

• Constant Off Time Current−Mode Control Operation

• Adjustable Off Time (0.5 [1]s to 10 [1]s)

• Internal Leading Edge Blanking

• Source 250 mA / Sink 500 mA Peak Drive Capability

• ±3.2% Current Sense Accuracy at 25℃• Internal Startup Delay

• 3.3 V Logic Level Dimming Input

• This is a Pb−Free Device

NCL30051安全特性:

• Thermal Shutdown

• Maximum On Time Protection

• Overcurrent Protection

NCL30051典型應(yīng)用:

• LED Backlight Drivers for LCD Panels

• LED Light Bars

• LED Street Lighting

• LED Bulbs

圖1.NCL30051方框圖

圖2.NCL30051典型應(yīng)用框圖

圖3.NCL30051典型應(yīng)用電路圖