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On Semi公司的NCL30160是恒流高亮LED驅動器,集成了1.0A MOSFET,輸入電壓從6.3V到40V,開關頻率高達1.4MHz,其滯后控制在負載瞬變和PWM調光時具有良好的電源抑制和快速反應,不需要控制回路補償,可調整LED電流,主要用在LED驅動器,恒流源,汽車照明,通用照明和工業照明.本文介紹了NCL30160主要特性,方框圖,應用電路以及評估板NCL30160GEVB主要特性,電路圖,材料清單和評估板NCL30160GEVB測試程序. NCL30160GEVB:Up to 40V, 1A NCL30160 LED Driver Buck Evaluation Board 1.0A Constant-Current Buck Regulator for Driving High Power LEDs The NCL30160 is an NFET hysteretic step−down, constant−current driver for high power LEDs. Ideal for automotive, industrial and general lighting applications utilizing minimal external components. The NCL30160 operates with an input voltage range from 6.3 V to 40 V. The hysteretic control gives good power supply rejection and fast response during load transients and PWM dimming to LED arrays of varying number and type. A dedicated PWM input (DIM/EN) enables wide range of pulsed dimming and a high switching frequency up to 1.4 MHz allows the use of smaller external components minimizing space and cost. Protection features include resistor−programmed constant LED current, shorted LED protection, under−voltage and thermal shutdown. The NCL30160 is available in a SOIC−8 package. NCL30160主要特性: • Integrated 1.0A MOSFET • VIN Range 6.3 V to 40 V • Short LED Shutdown Protection • Up to 1.4 MHz Switching Frequency • No Control Loop Compensation Required • Adjustable LED Current • Single Pin Brightness and Enable/Disable Control Using PWM • Supports All−Ceramic Output Capacitors and Capacitor−less Outputs • Thermal Shutdown Protection • Capable of 100% Duty Cycle Operation • This is a Pb−Free Device NCL30160典型應用: • LED Driver • Constant Current Source • Automotive Lighting • General Illumination • Industrial Lighting 
圖1.NCL30160簡化框圖
圖2.NCL30160驅動一個LED的應用電路圖(降壓) NCL30160GEVB:高達40V, 1A 的NCL30160 LED驅動器降壓評估板 NCL30160GEVB主要特性: Integrated MOSFET capable of 1.0 A Input voltage range from 6.3 V to 40 V Dimming capability using PWM LED short protection Thermal shutdown protection
圖3.評估板NCL30160GEVB外形圖
圖4.評估板NCL30160GEVB電路圖 評估板NCL30160GEVB材料清單:
圖5.評估板NCL30160GEVB測試程序圖 所需要設備:
詳情請見: 
NCL30160-D[1].pdf
(216.66 KB)
NCL30160GEVB_SCHEMATIC[1].pdf
(69.26 KB)
來源：網絡 |
