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参数资料
| 型号： | LT3755EUD-2#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONST CURR 16-QFN |
| 标准包装： | 121 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | 回扫，低端，PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 白色 LED |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.5 V ~ 40 V |
| 输出电压： | 75V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1340 (CN2011-ZH PDF) |
LT3755/LT3755-1/LT3755-2
40V IN , 75V OUT LED Controllers
3000:1 True Color PWM? Dimming
FEATURES
n
n Wide Input Voltage Range: 4.5V to 40V
n Output Voltage Up to 75V
n Constant-Current and Constant-Voltage Regulation
n 100mV High Side Current Sense
n Drives LEDs in Boost, Buck Mode, Buck-Boost Mode,
SEPIC or Flyback Topology
n Adjustable Frequency: 100kHz to 1MHz
n Open LED Protection
n Programmable Undervoltage Lockout with Hysteresis
n Improved Open LED Status Pin (LT3755-2)
n Frequency Synchronization (LT3755-1)
n PWM Disconnect Switch Driver
n CTRL Pin Provides Analog Dimming
n Low Shutdown Current: <1μA
n Programmable Soft-Start
n Thermally Enhanced 16-Lead QFN (3mm × 3mm)
and MSOP Packages
APPLICATIONS
DESCRIPTION
The LT ? 3755, LT3755-1 and LT3755-2 are DC/DC control-
lers designed to operate as a constant-current source for
driving high current LEDs. They drive a low side external
N-channel power MOSFET from an internal regulated 7.15V
supply. The fixed frequency, current mode architecture
results in stable operation over a wide range of supply
and output voltages. A ground referenced voltage FB pin
serves as the input for several LED protection features,
and also makes it possible for the converter to operate
as a constant-voltage source. A frequency adjust pin
allows the user to program the frequency from 100kHz
to 1MHz to optimize efficiency, performance or external
component size.
The LT3755/LT3755-1/LT3755-2 sense output current at
the high side of the LED string. High side current sensing
is the most flexible scheme for driving LEDs, allowing
boost, buck mode or buck-boost mode configuration.
The PWM input provides LED dimming ratios of up to
3000:1, and the CTRL input provides additional analog
dimming capability.
n
n
n
High Power LED
Battery Chargers
Accurate Current Limited Voltage Regulators
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.
TYPICAL APPLICATION
50W White Automotive LED Headlamp Driver
Efficiency vs V IN
V IN
8V TO
40V
4.7μF
1M
V IN
22μH
1M
4.7μF
100
185k
INTV CC
332k
40.2k
SHDN /UVLO
V REF
LT3755-2
CTRL
FB
ISP
ISN
0.1
1A
23.7k
96
92
100k
0.01μF
28.7k
375kHz
OPENLED
PWM
SS
RT
V C
10k
GATE
SENSE
PWMOUT
GND INTV CC
4.7μF
0.015
50W
LED
STRING
88
84
80
0
10
20
V IN (V)
30
40
0.001μF
37551 TA01a
37551 TA01b
37551fd
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3755EUDPBF | 制造商:Linear Technology 功能描述:4.5-40Vin 75Vout LED Controller QFN16EP |
| LT3755EUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:40VIN, 75VOUT LED Controller |
| LT3755EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:40VIN, 75VOUT LED Controller |
| LT3755HMSE-2#PBF | 功能描述:IC LED DVR HP CONST CURR 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LT3755HMSE-2#TRPBF | 功能描述:IC LED DVR HP CONST CURR 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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