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LM3424MHX

更新时间： 2024-11-23 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 驱动控制器
页数 文件大小 规格书
50页 1325K
描述
Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs

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中文翻译

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LM3424MHX 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：HTSSOP,Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.09接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PDSO-G20JESD-609代码：e0
长度：6.5 mm复用显示功能：NO
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm最大供电电压：75 V
最小供电电压：4.5 V标称供电电压：14 V
表面贴装：YES温度等级：AUTOMOTIVE
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4.4 mm
Base Number Matches：1

LM3424MHX 数据手册

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October 13, 2009  
LM3424  
Constant Current N-Channel Controller with Thermal  
Foldback for Driving LEDs  
General Description  
Features  
The LM3424 is a versatile high voltage N-channel MosFET  
controller for LED drivers . It can be easily configured in buck,  
boost, buck-boost and SEPIC topologies. In addition, the  
LM3424 includes a thermal foldback feature for temperature  
management of the LEDs. This flexibility, along with an input  
voltage rating of 75V, makes the LM3424 ideal for illuminating  
LEDs in a large family of applications.  
LM3424Q is an Automotive Grade product that is AEC-  
■
Q100 grade 1 qualified (-40°C to +125°C operating  
junction temperarure)  
VIN range from 4.5V to 75V  
■
■
High-side adjustable current sense  
2Ω, 1A Peak MosFET gate driver  
Input under-voltage and output over-voltage protection  
PWM and analog dimming  
■
■
■
■
■
■
■
■
■
■
Adjustable high-side current sense voltage allows for tight  
regulation of the LED current with the highest efficiency pos-  
sible. The LM3424 uses standard peak current-mode control  
providing inherent input voltage feed-forward compensation  
for better noise immunity. It is designed to provide accurate  
thermal foldback with a programmable foldback breakpoint  
and slope. In addition, a 2.45V reference is provided.  
Cycle-by-cycle current limit  
Programmable slope compensation  
Programmable, synchronizable switching frequency  
Programmable thermal foldback  
Programmable softstart  
The LM3424 includes a high-voltage startup regulator that  
operates over a wide input range of 4.5V to 75V. The internal  
PWM controller is designed for adjustable switching frequen-  
cies of up to 2.0 MHz and external synchronization is possible.  
The controller is capable of high speed PWM dimming and  
analog dimming. Additional features include slope compen-  
sation, softstart, over-voltage and under-voltage lock-out, cy-  
cle-by-cycle current limit, and thermal shutdown.  
Precision voltage reference  
Low power shutdown and thermal shutdown  
Applications  
LED Drivers - Buck, Boost, Buck-Boost, and SEPIC  
■
■
■
■
Indoor and Outdoor Area SSL  
The LM3424Q is an Automotive Grade product that is AEC-  
Q100 grade 1 qualified.  
Automotive  
General Illumination  
Constant-Current Regulators  
■
Typical Boost Application Circuit  
300857b6  
Boost Evaluation Board  
9 Series LEDs at 1A  
300857k9  
© 2009 National Semiconductor Corporation  
300857  
www.national.com  
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