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LM3405

更新时间: 2023-09-03 20:31:44
品牌 Logo 应用领域
德州仪器 - TI 驱动稳压器
页数 文件大小 规格书
33页 1186K
描述
用于驱动 LED 的 1.6MHz、1A 恒定电流降压稳压器

LM3405 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TSOP
包装说明:VSSOP,针数:6
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.16
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:15 V
最小输入电压:2.51 V标称输入电压:12 V
JESD-30 代码:R-PDSO-G6JESD-609代码:e3
长度:2.97 mm湿度敏感等级:1
功能数量:1端子数量:6
最高工作温度:125 °C最低工作温度:-40 °C
最大输出电流:2.8 A最大输出电压:13.5 V
最小输出电压:0.2 V封装主体材料:PLASTIC/EPOXY
封装代码:VSSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1 mm
表面贴装:YES切换器配置:BUCK
最大切换频率:1600 kHz温度等级:AUTOMOTIVE
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.95 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:1.65 mm
Base Number Matches:1

LM3405 数据手册

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LM3405  
SNVS429C OCTOBER 2006REVISED DECEMBER 2016  
LM3405 1.6-MHz, 1-A Constant Current Buck Regulator For Powering LEDS  
1 Features  
3 Description  
The LM3405 is a 1-A constant current buck LED  
driver designed to provide a simple, high efficiency  
solution for driving high power LEDs. With a 0.205-V  
reference voltage feedback control to minimize power  
dissipation, an external resistor sets the current as  
required for driving various types of LEDs. Switching  
frequency is internally set to 1.6 MHz, allowing small  
surface mount inductors and capacitors to be used.  
The LM3405 uses current-mode control and internal  
compensation offering ease of use and predictable,  
high performance regulation over a wide range of  
operating conditions. With a maximum input voltage  
of 15 V, the device can drive up to 3 High-Brightness  
LEDs in series at 1-A forward current, with the single  
LED forward voltage of approximately 3.7 V.  
Additional features include user accessible EN/DIM  
pin for enabling and PWM dimming of LEDs, thermal  
shutdown, cycle-by-cycle current limit and overcurrent  
protection.  
1
VIN Operating Range of 3 V to 15 V  
Drives up to 5 High-Brightness LEDs in Series at  
1 A  
Thin SOT-6 Package  
1.6-MHz Switching Frequency  
EN/DIM Input for Enabling and PWM Dimming of  
LEDs  
300-mNMOS Switch  
40-nA Shutdown Current at VIN = 5 V  
Internally Compensated Current-mode Control  
Cycle-by-Cycle Current Limit  
Input Voltage UVLO  
Overcurrent Protection  
Thermal Shutdown  
2 Applications  
Device Information(1)  
LED Drivers  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
Constant Current Sources  
Industrial Lighting  
LED Flashlights  
LM3405  
SOT (6)  
2.90 mm × 1.60 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application Circuit  
Efficiency vs LED Current (VIN = 5 V)  
D2  
VIN  
VIN  
BOOST  
SW  
C3  
D1  
C1  
VOUT  
L1  
LM3405  
ON  
IF  
C2  
C4  
EN/DIM  
OFF  
FB  
GND  
R1  
Copyright © 2016, Texas Instruments Incorporated  
Copyright © 2016, Texas Instruments Incorporated  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

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