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LED驱动器应用,可调整关断时间,源250mA/沉500mA峰值驱动能力, 25°C时的电流检测精度±3.2%,3.3V电平调光输入,具有热关断,过流保护和最大开态时间保护,主要用于LCD屏的LED背光驱动器,LED条灯,LED街灯和LED灯泡.本文介绍了NCL30051主要特性,方框图, 典型应用电路图, 输入80V 350mA输出的降压LED驱动器评估板NCL30105GEVB电路图,材料清单和PCB布局图.

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典型应用:

• LED Backlight Drivers for LCD Panels

• LED Light Bars

• LED Street Lighting

• LED Bulbs

图1.NCL30051方框图

图2.NCL30051典型应用框图

图3.NCL30051典型应用电路图

关键词： OnSemiNCL 3005160 WLED 驱动