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LT3492IUFD#TRPBF

更新时间： 2024-02-22 14:21:20
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
22页 327K
描述
LT3492 - Triple Output LED Driver with 3000:1 PWM Dimming; Package: QFN; Pins: 28; Temperature Range: -40°C to 85°C

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中文翻译

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LT3492IUFD#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, LCC28,.16X.2,20
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.04接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PQCC-N28JESD-609代码：e3
长度：5 mm湿度敏感等级：1
复用显示功能：NO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封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC28,.16X.2,20
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电源：3/30 V
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Display Drivers最大供电电压：30 V
最小供电电压：3 V标称供电电压：5 V
表面贴装：YES技术：BIPOLAR
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 mmBase Number Matches：1

LT3492IUFD#TRPBF 数据手册

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LT3492  
Triple Output LED Driver  
with 3000:1 PWM Dimming  
DESCRIPTION  
The LT®3492 is a triple output DC/DC converter designed  
to operate as a constant-current source and is ideal for  
driving LEDs. The LT3492 works in buck, boost or buck-  
boost mode. The LT3492 uses a fixed frequency, current  
mode architecture resulting in stable operation over a  
wide range of supply and output voltages. A frequency  
adjust pin allows the user to program switching frequency  
between 330kHz and 2.1MHz to optimize efficiency and  
external component size.  
FEATURES  
n
True Color PWM™ Dimming Delivers Up to 3000:1  
Dimming Ratio  
n
Built-In Gate Driver for PMOS LED Disconnect  
n
Three Independent Driver Channels with 600mA,  
60V Internal Switches  
n
Operates in Buck, Boost, Buck-Boost Modes  
n
CTRL Pin Accurately Sets LED Current Sense  
Threshold Over a Range of 10mV to 100mV  
n
Adjustable Frequency: 330kHz to 2.1MHz  
n
Open LED Protection  
Wide Input Voltage Range:  
The external PWM input provides 3000:1 LED dimming  
on each channel. Each of the three channels has a built-in  
gate driver to drive an external LED-disconnect P-channel  
MOSFET,allowinghighdimmingrange.Theoutputcurrent  
range of each channel of the LT3492 is programmed with  
an external sense resistor.  
n
Operation from 3V to 30V  
Transient Protection to 40V  
n
Surface Mount Components  
n
28-Lead (4mm × 5mm) QFN and TSSOP Packages  
The CTRL pin is used to adjust the LED current either for  
analog dimming or overtemperature protection.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. 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, and others pending.  
APPLICATIONS  
n
RGB Lighting  
n
Billboards and Large Displays  
n
Automotive and Avionic Lighting  
n
Constant-Current Sources  
TYPICAL APPLICATION  
High Dimming Ratio Triple Output Buck-Mode LED Power Supply  
PV  
IN  
58V  
1μF  
s3  
ISP1  
330mΩ  
ISN1  
ISP2  
330mΩ  
ISN2  
ISP3  
330mΩ  
ISN3  
3000:1 PWM Dimming at 100Hz  
TG1  
TG2  
TG3  
PWM  
5V/DIV  
10 LEDs  
0.3A  
0.3A  
0.3A  
0.47μF  
I
LED  
0.2A/DIV  
0.47μF 0.47μF  
I
L
0.5A/DIV  
33μH  
33μH  
33μH  
3492 TA01b  
1μs/DIV  
SW1  
SW2  
SW3  
TG1-3  
ISP1-3  
ISN1-3  
V
V
CTRL1-3  
C1-3  
REF  
V
IN  
3V TO 24V  
V
IN  
PWM1-3  
SHDN  
1μF  
10k  
680pF  
150k  
LT3492  
GND  
FADJ  
49.9k  
1.3MHz  
OVP1-3  
3492 TA01a  
3492fa  
1
1234567...22

中文翻译

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