收藏本站

LT3743
High Current Synchronous
Step-Down LED Driver with
Three-State Control
FEATURES
DESCRIPTION
n
n
n
n
n
n
n
n
n
n
PWM Dimming Provides Up to 3000:1 Dimming Ratio
CTRL_SEL Dimming Provides Up to 3000:1 Dimming
Ratio Between Any Current
Three-State Current Control for Color Mixing
±6% Current Regulation Accuracy
6V to 36V Input Voltage Range
Average Current Mode Control
2μs Maximum Recovery Time Between Any Current
Regulation State
<1μA Shutdown Current
Output Voltage Regulation and Open-LED Protection
Thermally Enhanced 4mm × 5mm QFN and
28-Pin FE Package
The LT ? 3743 is a fixed frequency synchronous step-down
DC/DC controller designed to drive high current LEDs. The
average current mode controller will maintain inductor
current regulation over a wide output voltage range of 0V
to (V IN – 2V). LED dimming is achieved through analog
dimming on the CTRL_L, CTRL_H and CTRL_T pins and
with PWM dimming on the PWM and CTRL_SEL pins.
Through the use of externally switched load capacitors,
the LT3743 is capable of changing regulated LED current
levels within several μs, providing accurate, high speed
PWM dimming between two current levels. The switching
frequency is programmable from 200kHz to 1MHz through
an external resistor on the RT pin.
DLP Projectors
High Power Architectural Lighting
Laser Diodes
APPLICATIONS
n
n
n
TYPICAL APPLICATION
92% Efficient 20A LED Driver
Additional features include voltage regulation and
overvoltage protection set with a voltage divider from the
output to the FB pin. Overcurrent protection is provided
and set by the CTRL_H pin.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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,
8120335 and others pending.
EN/UVLO
PWM
CTRL_SEL
EN/UVLO
PWM
CTRL_SEL
V IN
1μF
4.7μF
× 4
V IN
10V TO 30V
V CC_INT
CTRL_H
2.2nF
R HOT
499?
82.5k
100k
100k
R NTC
10k
RT HG
SYNC
CBOOT
V REF LT3743 SW
CTRL_L
LG
GND
CTRL_T SENSE +
SENSE –
PWMGH
220nF
22μF
M1
1.1μH
M2
2.5m
OUTPUT
20A MAXIMUM
4.7μF
330μF
× 3
330μF
× 3
M3
M4
CTRL_SEL
5V/DIV
PWM
5V/DIV
SW
20V/DIV
I LED
10A/DIV
10nF
SS
V CL
PWMGL
FB
V CH
3743 TA01a
330μF
× 3
51.1k
10.0k
V IN = 24V 20μs/DIV
0A TO 2A TO 20A LED CURRENT STEP
3743 TA01b
34k
8.2nF
34k
8.2nF
M1, M2: SiR462DP
M3, M4: Si7234DP
3743fd
1
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LT3745IUJ#TRPBF IC LED DVR 16CH 50MA 40QFN
LT3746IUHH#TRPBF IC LED DRIVER 32CHANNEL 56-QFN
LT3754IUH#TRPBF IC LED DVR 16CH 50MA 32QFN
LT3755EMSE#PBF IC LED DRVR HP CONS CURR 16-MSOP
LT3760EFE#PBF IC LED DVR WHT/CLR BCKLT 28TSSOP
LT3799IMSE#PBF IC LED DRIVER TRIAC DIM 16-MSOP
LT3956EUHE#PBF IC LED DVR BUCK BOOST 36-VQFN
LTC3201EMS#TRPBF IC LED DRVR WHITE BCKLGT 10-MSOP
相关代理商/技术参数
LT3743EFE#PBF 制造商:Linear Technology 功能描述:IC LED DRIVER BUCK TSSOP-28
LT3743EFE#TRPBF 功能描述:IC LED DVR SYNC STEPDOWN 28TSSOP 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
LT3743EFEPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:High Current Synchronous Step-Down LED Driver with Three-State Control
LT3743EFETRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:High Current Synchronous Step-Down LED Driver with Three-State Control
LT3743EUFD#PBF 功能描述:IC LED DRVR HP CONST CURR 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C
LT3743EUFD#PBF 制造商:Linear Technology 功能描述:IC LED DRIVER BUCK QFN-28 制造商:Linear Technology 功能描述:IC, LED DRIVER, BUCK, QFN-28
LT3743EUFD#TRPBF 功能描述:IC LED DVR SYNC STEP-DOWN 28QFN 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
LT3743EUFDPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:High Current Synchronous Step-Down LED Driver with Three-State Control