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LT3476IUHF#TRPBF

更新时间： 2024-12-01 19:51:51
品牌 Logo 应用领域
凌特 - Linear 驱动接口集成电路
页数 文件大小 规格书
14页 232K
描述
LT3476 - High Current Quad Output LED Driver; Package: QFN; Pins: 38; Temperature Range: -40°C to 85°C

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中文翻译

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LT3476IUHF#TRPBF 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：38Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.59接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PQCC-N38JESD-609代码：e3
长度：7 mm复用显示功能：NO
功能数量：1区段数：8
端子数量：38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：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）：NOT SPECIFIED
座面最大高度：0.8 mm最大供电电压：16 V
最小供电电压：2.8 V标称供电电压：3.3 V
表面贴装：YES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：NOT SPECIFIED宽度：5 mm
Base Number Matches：1

LT3476IUHF#TRPBF 数据手册

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LT3476  
High Current  
Quad Output LED Driver  
FeAtures  
n
Description  
True Color PWMTM Dimming Delivers Up to 5000:1  
The LT®3476 is a quad output DC/DC converter designed  
to operate as a constant-current source for driving high  
currentLEDs.Afixedfrequency,currentmodearchitecture  
results in stable operation over a wide range of supply and  
output voltages. A frequency adjust pin allows the user to  
program switching frequency between 200kHz and 2MHz  
to optimize efficiency and external component size.  
Dimming Ratio (In Boost Configuration)  
n
LED Current Regulation with High-Side Sense  
n
VADJ Pin Accurately Sets LED Current Sense  
Threshold Over Range 10mV to 120mV  
n
Four Independent Driver Channels with 1.5A, 36V  
Internal NPN Switches  
n
Frequency Adjust Pin: 200kHz to 2MHz  
The LT3476 senses output current at the high side of  
the LED. High side current sensing is the most flexible  
scheme for driving LEDs, allowing buck, boost or buck-  
boost configurations. Each current monitor threshold is  
trimmed to within 2.5% at the full scale of 105mV. With  
an external sense resistor, the user programs the output  
current range of each channel. Each of the four regulators  
is independently operated by that channel’s PWM signal.  
This PWM feature allows precise adjustment of the color  
mixing or dimming ratio of the LED source. Dimming  
ratios up to 1000:1 can be achieved.  
n
High Efficiency Conversion = Up to 96%  
n
Open LED Protection  
n
Low Shutdown Current < 10µA  
n
Wide V Range: 2.8V to 16V  
IN  
n
Thermally Enhanced, 38-Lead, 5mm × 7mm  
QFN Package  
ApplicAtions  
n
RGGB Lighting  
n
Automotive and Avionic Lighting  
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.  
n
TFT LCD Backlighting  
Constant-Current Sources  
n
typicAl ApplicAtion  
100W Quad 1A × 8 LED Driver  
1000:1 PWM Dimming at 100Hz  
PV  
IN  
33V  
CAP1  
100mΩ  
LED1  
CAP2  
100mΩ  
LED2  
CAP3  
100mΩ  
LED3  
CAP4  
100mΩ  
LED4  
PWM  
5V/DIV  
2.2µF  
× 4  
UP TO  
8 LEDS  
1A  
1A  
1A  
1A  
I
LED  
500mA/DIV  
0.22µF  
0.22µF  
0.22µF  
0.22µF  
3476 TA02  
5µs/DIV  
10µH  
10µH  
10µH  
10µH  
1.05V  
SW1  
SW2  
SW3  
SW4  
REF  
VADJ1-4  
4.99k  
100k  
CAP1-4  
LED1-4  
V
IN  
2.8V TO 16V  
LT3476  
V
IN  
VC1-4  
RT  
PWM1-4  
SHDN  
2.2µF  
PWM1-4  
SHDN  
GND  
21k  
1nF  
3476 TA01  
3476fb  
1
1234567...14

中文翻译

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LT3476IUHF#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3476IUHF#PBF Linear

完全替代

 LT3476 - High Current Quad Output LED Driver; Package: QFN; Pins: 38; Temperature Range: -

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