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MIC3223

更新时间： 2024-11-20 11:53:07
品牌 Logo 应用领域
麦瑞 - MICREL 驱动器
页数 文件大小 规格书
24页 1281K
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High Power Boost LED Driver with Integrated FET

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MIC3223 数据手册

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MIC3223  
High Power Boost LED Driver with  
Integrated FET  
General Description  
Features  
The MIC3223 is a constant current boost LED driver  
capable of driving a series string of high power LEDs. The  
MIC3223 can be used in general lighting, bulb replacement,  
garden pathway lighting and other solid state illumination  
applications.  
• 4.5V to 20V supply voltage  
• 200mV feedback voltage with an accuracy of ±5%  
• Step-up output voltage (boost) conversion up to 37V  
• 1MHz switching frequency  
• 100mΩ/3.5A internal power FET switch  
• LEDs can be dimmed using a PWM signal  
• User settable LED current (through external resistor)  
• Externally programmable soft-start  
The MIC3223 is a peak current mode control PWM boost  
regulator and the 4.5V and 20V operating input voltage  
range allows multiple applications from a 5V or a 12V bus.  
The MIC3223 implements a fixed internal 1MHz switching  
frequency to allow for a reduction in the design footprint  
size. Power consumption has been minimized through the  
implementation of a 200mV feedback voltage that provides  
an accuracy of ±5%. The MIC3223 can be dimmed through  
the use of a PWM signal and features an enable pin for a  
low power shutdown state.  
• Protection features that include:  
–
–
–
Output over-voltage protection (OVP)  
Under-voltage lockout (UVLO)  
Over temperature protection  
• Junction temperature range: -40°C to +125°C  
• Available in a exposed pad 16-pin TSSOP package  
The MIC3223 is a very robust LED driver and offers the  
following protection features: over voltage protection (OVP),  
thermal shutdown, switch current limiting and under voltage  
lockout (UVLO).  
Applications  
• Architectural lighting  
• Industrial lighting  
• Signage  
The MIC3223 is offered in a low profile exposed pad 16-pin  
TSSOP package.  
• Landscape lighting (garden/pathway)  
• Under cabinet lighting  
• MR-16 bulbs  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
_______________________________________________________________________________________________________________________  
Typical Application  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-011510-A  
January 2010  
1234567...24

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