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LM3431AQMHX/NOPB

更新时间： 2024-10-03 11:13:47
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德州仪器 - TI 驱动控制器开关光电二极管驱动器
页数 文件大小 规格书
39页 1985K
描述
具有集成升压控制器的 3 通道汽车类 LED 恒流驱动器 | PWP | 28 | -40 to 125

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LM3431AQMHX/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active包装说明：HTSSOP,
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：5.64模拟集成电路 - 其他类型：SWITCHING CONTROLLER
JESD-30 代码：R-PDSO-G28JESD-609代码：e3
湿度敏感等级：1最大输出电流：0.6 A
最大输出电压：40 V最小输出电压：5.5 V
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）：260表面贴装：YES
切换器配置：BOOST最大切换频率：1000 kHz
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

LM3431AQMHX/NOPB 数据手册

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LM3431  
www.ti.com  
SNVS547G –NOVEMBER 2007–REVISED MAY 2013  
3-Channel Constant Current LED Driver with Integrated Boost Controller  
Check for Samples: LM3431  
1
FEATURES  
DESCRIPTION  
The LM3431 is a 3-channel linear current controller  
combined with a boost switching controller ideal for  
driving LED backlight panels in space critical  
applications. The LM3431 drives 3 external NPN  
transistors or MOSFETs to deliver high accuracy  
constant current to 3 LED strings. Output current is  
adjustable to drive strings in excess of 200 mA. The  
LM3431 can be expanded to drive as many as 6 LED  
strings.  
2
•
LM3431Q/LM3431AQ are Automotive Grade  
Products that are AEC-Q100 Grade 1 Qualified  
(–40°C to 125°C operating junction  
temperature)  
•
•
•
•
•
•
•
•
•
•
3-Channel Programmable LED Current  
High Accuracy Linear Current Regulation  
Analog and Digital PWM Dimming Control  
Up to 25kHz Dimming Frequency  
>100:1 Contrast Ratio  
The boost controller drives an external NFET switch  
for step-up regulation from input voltages between 5V  
and 36V. The LM3431 features LED cathode  
feedback to minimize regulator headroom and  
optimize efficiency.  
Integrated Boost Controller  
5V-36V Input Voltage Range  
Adjustable Switching Frequency up to 1MHz  
LED Short and Open Protection  
A DIM input pin controls LED brightness from analog  
or digital control signals. Dimming frequencies up to  
25 kHz are possible with a contrast ratio of 100:1.  
Contrast ratios greater than 1000:1 are possible at  
lower dimming frequencies.  
Selectable Fault Shutdown or Automatic  
Restart  
•
•
•
•
•
•
•
•
Programmable Fault Delay  
Programmable Cycle by Cycle Current Limit  
Output Over Voltage Protection  
No Audible Noise  
The LM3431 eliminates audible noise problems by  
maintaining constant output voltage regulation during  
LED dimming. Additional features include LED short  
and open protection, fault delay/error flag, cycle by  
cycle current limit, and thermal shutdown for both the  
IC and LED array. The enhanced LM3431A features  
reduced offset voltage for higher accuracy LED  
current.  
Enable Pin  
LED Over-Temperature Shutdown Input  
Thermal Shutdown  
TSSOP-28 Exposed Pad Package  
APPLICATIONS  
•
•
Automotive Infotainment Displays  
Small to Medium Format Displays  
TYPICAL APPLICATION CIRCUIT  
Vin: 5V to 36V  
+
VIN  
EN  
LG  
CS  
VCC  
MODE/F  
DIM  
LEDOFF  
ILIM  
PGND  
THM  
PWM Dim  
input  
LM3431  
AFB  
SC  
CFB  
NDRV1  
SNS1  
NDRV2  
SNS2  
NDRV3  
SNS3  
REF  
REFIN  
COMP  
FF  
VCC  
RT  
SS/SH  
DLY  
SGND  
Ch.2/  
Ch.3  
Ch.2  
Ch.3  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007–2013, Texas Instruments Incorporated  
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LM3431AQMHX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3431AQMH/NOPB TI

功能相似

 具有集成升压控制器的 3 通道汽车类 LED 恒流驱动器 | PWP | 28 | -40

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 		具有集成升压控制器的 3 通道汽车类 LED 恒流驱动器 | PWP | 28 | -40
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