關鍵詞： LED驅動 , NCL30160 , On , SEMI

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

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圖1.NCL30160簡化框圖

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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

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圖3.評估板NCL30160GEVB外形圖

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圖4.評估板NCL30160GEVB電路圖

評估板NCL30160GEVB材料清單:

2012-6-12 13:05:05 上傳

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