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参数资料
型号： LT3754IUH#TRPBF
厂商： Linear Technology
文件页数： 1/30页
文件大小： 0K
描述： IC LED DVR 16CH 50MA 32QFN
标准包装： 2,500
恒定电流： 是
拓扑： PWM，升压（升压）
输出数： 16
内部驱动器： 无
类型 - 主要： 车载，背光
类型 - 次要： 白色 LED
频率： 100kHz ~ 1MHz
电源电压： 6 V ~ 40 V
安装类型： 表面贴装
封装/外壳： 32-WFQFN 裸露焊盘
供应商设备封装： 32-QFN
包装： 带卷 (TR)
工作温度： -40°C ~ 125°C
LT3754
16-Channel × 50mA
LED Driver
Up to 45V of LEDs × 50mA, 16-Channel LED Driver
Wide Input Range : 6V to 40V (4.5V to 13V,
± 2.8% LED Current Matching at 20mA (Typ ±0.7%)
Up to 3000:1 True Color PWM? Dimming Range
Single Resistor Sets LED Current (10mA to 50mA)
LED Current Regulated Even for PV IN > V OUT
Output Adapts to LED V F for Optimum Efficiency
Fault Flag + Protection for Open LED Strings
Protection for LED Pin to V OUT Short
Parallel Channels for Higher LED Current
Programmable LED Current Derating vs Temperature
Accurate Undervoltage Lockout Threshold with
Programmable Frequency (100kHz to 1MHz)
Synchronizable to an External Clock
Automotive, Notebook and TV Monitor Backlighting
FEATURES
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V IN Connected to INTV CC )
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Programmable Hysteresis
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APPLICATIONS
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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, 7321203.
TYPICAL APPLICATION
DESCRIPTION
The LT ? 3754 is a 16-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 ±2.8%
current matching. Channels follow a master programmable
current to allow between 10mA to 50mA of LED current
per string. Channels can be paralleled for higher LED
current. Output voltage adapts to variations in LED V F for
optimum efficiency and open LED faults do not affect the
operation of connected LED strings.
The LT3754 allows a PWM dimming range up to 3000:1
and an analog dimming range up to 25:1. Operating
frequency can be programmed from 100kHz up to 1MHz
using a single resistor or synchronized to an external clock.
Additional features include: programmable maximum
V OUT for open LED protection, a fault flag for open LED,
programmable LED current derating vs temperature,
micropower shutdown and internal soft-start. The LT3754
is available in a thermally enhanced 5mm × 5mm 32-pin
QFN package.
PV IN
24V
4.7μF
92% Efficient, 36W Backlight LED Driver
10μH UP TO 45V OF LEDs PER STRING
Worst-Case Channels LED Current Matching
(Normalized to 16-Channel Average)
0.8
V IN
10V
499k
4.7μF
4.7μF
INTV CC
V IN
GATE
SENSE
5 ×
2.2μF
? ? ? ?
0.4
SHDN /UVLO
0.015
0.0
?
?
?
?
40.2k
CTRL
V OUT
?
?
?
?
?
?
?
?
PWM
LT3754
LED1
–0.4
?
?
?
V IN
20k
30.9k
11k
20k
V REF
T SET
OVP SET
GND
RT
I SET
39.2k 5.76k
V C
10k
LED2
?
?
LED15
LED16
FAULT
SYNC
? 16 CHANNELS
?
100k
3754 TA01
–0.8
R ISET = 14.7k (I(LED) = 20mA)
–50 –25 0 25 50 75
JUNCTION TEMERATURE (°C)
100 125
3754 TA01
2.2nF
3754fc
1
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相关代理商/技术参数
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LT3755 制造商:LINER 制造商全称:Linear Technology 功能描述:60V 4-Switch Synchronous
LT3755-1 制造商:LINER 制造商全称:Linear Technology 功能描述:60V 4-Switch Synchronous
LT3755-2 制造商:LINER 制造商全称:Linear Technology 功能描述:60V 4-Switch Synchronous
LT3755EMSE#PBF 功能描述:IC LED DRVR HP CONS CURR 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C
LT3755EMSE#PBF 制造商:Linear Technology 功能描述:DRIVER LED 40VIN 1MHZ 16MSOP 制造商:Linear Technology 功能描述:DRIVER, LED, 40VIN, 1MHZ, 16MSOP
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