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MIC3201YMETR PDF预览

MIC3201YMETR

更新时间: 2024-11-07 13:11:31
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麦瑞 - MICREL 驱动器
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MIC3201YMETR 数据手册

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MIC3201  
High Brightness LED Driver with  
High-Side Current Sense  
General Description  
Features  
The MIC3201 is a hysteretic step-down, constant-current,  
High-Brightness LED (HB LED) driver capable of driving  
up to four, 1A LEDs. It provides an ideal solution for  
interior/exterior lighting, architectural and ambient lighting,  
LED bulbs, and other general illumination applications.  
6.0V to 20V input voltage range  
High efficiency (>90%)  
± 5% LED current accuracy  
High-side current sense  
Dedicated dimming control input  
Hysteretic control (no compensation!)  
1A internal power switch  
Up to 1MHz switching frequency  
Adjustable constant LED current  
5V on board regulator  
The MIC3201 operates with an input voltage range from  
6V to 20V. The hysteretic control gives good supply  
rejection and fast response during load transients and  
PWM dimming. The high-side current sensing and on-chip  
current sense amplifier delivers LED current with ±5%  
accuracy. An external high-side current sense resistor is  
used to set the output current.  
Over temperature protection  
–40°C to +125°C junction temperature range  
Available in an 8-Pin ePad SOIC package  
The MIC3201 offers a dedicated PWM input (DIM) which  
enables a wide range of pulsed dimming. A high switching  
frequency operation up to 1MHz allows the use of smaller  
external components minimizing space and cost.  
The MIC3201 operates from -40°C to 85°C and is  
available in an 8-pin epad SOIC package.  
Applications  
Architectural, industrial, and ambient lighting  
LED bulbs  
Indicators and emergency lighting  
Street lighting  
Datasheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
Channel letters  
12V lighting systems (MR-16 bulbs, under cabinet  
lighting, garden/pathway lighting)  
_________________________________________________________________________________________________________________________  
Typical Application  
MIC3201 Step-down LED Driver Circuit  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-011210-B  
January 2010  

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