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LT3519-1

更新时间： 2024-11-13 11:45:15
品牌 Logo 应用领域
凌特 - Linear 驱动器
页数 文件大小 规格书
32页 419K
描述
8-Channel × 100mA LED Driver

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中文翻译

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LT3519-1 数据手册

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LT3760  
× 100mA  
8-Channel  
LED Driver  
FeaTures  
DescripTion  
The LT®3760 is an 8-channel LED driver with a step-up  
DC/DC controller capable of driving up to 45V of LEDs.  
Each channel contains an accurate current sink with ±±2  
currentmatching.Channelsfollowamasterprogrammable  
current to allow between ±0mA to 100mA of LED current  
per string. Channels can be paralleled for higher LED  
n
Up to 45V of LEDs × 100mA, 8-Channel LED Driver  
n
Wide Input Range : 6V to 40V (4.5V to 13V,  
V Connected to INTV )  
IN  
CC  
n
n
n
n
n
n
n
n
n
n
±2% LED Current Matching at 40mA (Typ 0.ꢀ%)  
Up to 3000:1 True Color PWM™ Dimming Range  
Single Resistor Sets LED Current (20mA to 100mA)  
LED Current Regulated Even for PV > V  
current. Output voltage adapts to variations in LED V for  
F
IN  
OUT  
optimum efficiency and open LED faults do not affect the  
Output Adapts to LED V for Optimum Efficiency  
F
operation of connected LED strings.  
Fault Flag + Protection for Open LED Strings  
Protection for LED Pin to V  
Short  
OUT  
The LT3760 allows a PWM dimming range up to 3000:1  
and an analog dimming range up to ±5:1. Operating  
frequency can be programmed from 100kHz up to 1MHz  
usingasingleresistororsynchronizedtoanexternalclock.  
Parallel Channels for Higher LED Current  
Programmable LED Current Derating vs Temperature  
Accurate Undervoltage Lockout Threshold with  
Programmable Hysteresis  
Programmable Frequency (100kHz to 1MHz)  
Synchronizable to an External Clock  
Additional features include: programmable maximum  
n
n
V
OUT  
for open LED protection, a fault flag for open LED,  
programmable LED current derating vs temperature, mi-  
cropower shutdown and internal soft-start. The LT3760 is  
available in a thermally enhanced ±8-pin TSSOP package.  
applicaTions  
L, LT, LTC and 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, 73±1±03.  
n
Automotive, Notebook and TV Monitor Backlighting  
Typical applicaTion  
Worst-Case Channels LED Current Matching  
(Normalized to 8-Channel Average)  
92% Efficient, 36W Backlight LED Driver  
PV  
IN  
20V TO 36V  
0.8  
4.7µF  
4.7µF  
10µH  
UP TO 45V OF LEDs PER STRING  
V
IN  
8V TO 14V  
5×  
0.4  
0.0  
V
IN  
2.2µF  
INTV  
GATE  
CC  
4.7µF  
499k  
• • • •  
SENSE  
PGND  
SHDN/UVLO  
0.015Ω  
40.2k  
•
•
•
•
•
•
•
•
•
•
CTRL  
PWM  
V
–0.4  
–0.8  
OUT  
LED1  
LED2  
LT3760  
R
= 14.7k (I(LED) = 40mA)  
ISET  
•
•
REF  
•
•
•
•
8 CHANNELS ×100mA  
•
–50 –25  
0
25  
50 75  
100 125  
•
20k  
LED7  
JUNCTION TEMERATURE (°C)  
3760 TA01  
T
SET  
LED8  
3760 TA01  
100k  
30.9k 11k  
20k  
FAULT  
V
IN  
OVP  
SET  
GND RT  
I
V
SYNC  
SET  
C
39.2k  
1MHz  
5.76k  
10k  
2.2nF  
3760fc  
1
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中文翻译

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