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LT3598IUFTRPBF PDF预览

LT3598IUFTRPBF

更新时间： 2024-02-15 12:04:49
品牌 Logo 应用领域
凌特 - Linear 驱动器
页数 文件大小 规格书
24页 396K
描述
6-String 30mA LED Driver with 1.5% Current Matching

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LT3598IUFTRPBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HVQCCN,
针数：24Reach Compliance Code：compliant
风险等级：5.04接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
复用显示功能：NO功能数量：1
区段数：60端子数量：24
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：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：0.8 mm最大供电电压：30 V
最小供电电压：3.2 V标称供电电压：5 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：4 mm
Base Number Matches：1

LT3598IUFTRPBF 数据手册

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LT3598  
6-String 30mA LED Driver  
with 1.5% Current Matching  
FEATURES  
DESCRIPTION  
TheLT®3598isafixedfrequencystep-upDC/DCconverter  
designed to drive up to six strings of LEDs at an output  
voltage up to 44V. LED dimming can be achieved with  
analog dimming on the CTRL pin, and with pulse width  
modulation dimming on the PWM pin. The LT3598  
accurately regulates LED current even when the input  
voltageishigherthantheLEDoutputvoltage.Theswitching  
frequency is programmable from 200kHz to 2.5MHz  
through an external resistor.  
n
True Color PWM™ Dimming Delivers Up to 3000:1  
Dimming Ratio  
n
Drives Six Strings of LEDs at Up to 30mA  
n
1.5% Accurate LED Current Matching  
n
Wide Input Voltage Range: 3.2V to 30V  
n
Output Voltage Up to 44V  
n
Regulates Current Even When V > V  
IN  
OUT  
n
n
n
n
n
n
n
n
Disconnects LEDs in Shutdown  
Programmable Open LED Protection (Regulated)  
OPENLED Alert Pin  
Additional features include programmable overvoltage  
protection, switching frequency synchronization to an  
external clock, LED current derating based on junction  
temperature and/or LED temperature, LED string disable  
control, OPENLED alert pin and output voltage limiting  
when all LED strings are disconnected. The LT3598 is  
available in a thermally enhanced 24-lead (4mm × 4mm)  
QFN and 24-lead TSSOP packages.  
Programmable LED Current Derating  
Adjustable Frequency: 200kHz to 2.5MHz  
Synchronizable to an External Clock  
Parallel Channels for Higher Current per LED String  
Thermally Enhanced 4mm × 4mm QFN and 24-Lead  
TSSOP Packages  
APPLICATIONS  
LT, LTC and LTM 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.  
n
Notebook Computer Display  
n
Medium Size Displays  
n
Automotive LCD Display  
TYPICAL APPLICATION  
LED Current Matching  
90% Efficient LED Driver for 60 White LEDs  
PV  
IN  
10μH  
8V TO 40V  
1.5  
ALL SIX LED STRINGS  
2.2μF  
4.7μF  
1.0  
SW  
V
OUT  
V
IN  
V
V
O_SW  
IN  
5V  
1.00M  
30.9k  
0.5  
0
100k  
2.2μF  
OPENLED  
SHDN  
PWM  
FB  
SHDN  
PWM  
SYNC  
–0.5  
–1.0  
–1.5  
LT3598  
SYNC  
RT  
51.1k  
V
REF  
10k  
–50 –25  
0
25  
50  
75 100 125  
LED1  
LED2  
LED3  
LED4  
LED5  
LED6  
CTRL  
TEMPERATURE (°C)  
3598 TA01b  
20mA  
100k  
T
I
V
C
SS  
GND  
SET SET  
60.4k  
10nF  
2.61k  
15nF  
47pF  
14.7k  
100k  
3598 TA01a  
3598fa  
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