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LT3743IUFD#PBF

更新时间： 2024-11-06 19:46:39
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
28页 507K
描述
LT3743 - High Current Synchronous Step-Down LED Driver with Three-State Control; Package: QFN; Pins: 28; Temperature Range: -40°C to 85°C

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中文翻译

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LT3743IUFD#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN,
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.55其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 0V TO 34V
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：36 V
最小输入电压：6 V标称输入电压：12 V
JESD-30 代码：R-PQCC-N28JESD-609代码：e3
长度：5 mm湿度敏感等级：1
功能数量：1端子数量：28
最高工作温度：125 °C最低工作温度：-40 °C
标称输出电压：5 V封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装形状：RECTANGULAR
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.8 mm
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：1070 kHz温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：4 mm
Base Number Matches：1

LT3743IUFD#PBF 数据手册

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LT3743  
High Current Synchronous  
Step-Down LED Driver with  
Three-State Control  
FEATURES  
DESCRIPTION  
The LT®3743 is a fixed frequency synchronous step-down  
DC/DCcontrollerdesignedtodrivehighcurrentLEDs. The  
average current mode controller will maintain inductor  
current regulation over a wide output voltage range of 0V  
n
PWM Dimming Provides Up to 3000:1 Dimming Ratio  
n
CTRL_SEL Dimming Provides Up to 3000:1 Dimming  
Ratio Between Any Current  
n
Three-State Current Control for Color Mixing  
n
±±% Current Regulation Accuracy  
to (V – 2V). LED dimming is achieved through analog  
IN  
n
6V to 36V Input Voltage Range  
dimming on the CTRL_L, CTRL_H and CTRL_T pins and  
with PWM dimming on the PWM and CTRL_SEL pins.  
Through the use of externally switched load capacitors,  
the LT3743 is capable of changing regulated LED current  
levels within several µs, providing accurate, high speed  
PWM dimming between two current levels. The switching  
frequencyisprogrammablefrom200kHzto1MHzthrough  
an external resistor on the RT pin.  
n
Average Current Mode Control  
n
2µs Maximum Recovery Time Between Any Current  
Regulation State  
<1µA Shutdown Current  
n
n
Output Voltage Regulation and Open-LED Protection  
Thermally Enhanced 4mm × 5mm QFN and  
n
28-Pin FE Package  
Additionalfeaturesincludevoltageregulationandovervolt-  
age protection set with a voltage divider from the output  
to the FB pin. Overcurrent protection is provided and set  
by the CTRL_H pin.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents including 7199560, 7321203,  
8120335 and 8901904.  
APPLICATIONS  
n
DLP Projectors  
High Power Architectural Lighting  
n
n
Laser Diodes  
TYPICAL APPLICATION  
92% Efficient 20A LED Driver  
V
IN  
10V TO 30V  
V
IN  
EN/UVLO  
PWM  
CTRL_SEL  
EN/UVLO  
PWM  
CTRL_SEL  
4.7µF  
×4  
1µF  
M1  
RT  
SYNC  
HG  
CTRL_SEL  
220nF  
82.5k  
100k  
5V/DIV  
OUTPUT  
CBOOT  
1.1µH  
2.5mΩ  
20A MAXIMUM  
PWM  
5V/DIV  
V
SW  
LT3743  
REF  
2.2nF  
4.7µF  
CTRL_L  
V
330µF  
×3  
CC_INT  
SW  
20V/DIV  
22µF  
R
LG  
M2  
HOT  
CTRL_H  
CTRL_T  
100k  
330µF  
×3  
499Ω  
GND  
+
M3  
SENSE  
SENSE  
I
LED  
10A/DIV  
–
R
NTC  
10k  
PWMGH  
M4  
SS  
PWMGL  
3743 TA01b  
10nF  
V
= 24V  
20µs/DIV  
51.1k  
10.0k  
IN  
0A TO 2A TO 20A LED CURRENT STEP  
FB  
330µF  
×3  
V
CL  
V
CH  
3743 TA01a  
34k  
34k  
8.2nF  
M1, M2: SiR462DP  
M3, M4: Si7234DP  
8.2nF  
3743fe  
1
For more information www.linear.com/LT3743  
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中文翻译

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LT3743IUFD#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3743IUFD#TRPBF Linear

完全替代

 LT3743 - High Current Synchronous Step-Down LED Driver with Three-State Control; Package:

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