- 您现在的位置：买卖IC网 > PDF目录20868 > LT3477EUF#TRPBF (Linear Technology)IC LED DRVR HP CONST CURR 20-QFN PDF资料下载
参数资料
| 型号： | LT3477EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONST CURR 20-QFN |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | 回扫，PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 白色 LED |
| 频率： | 200kHz ~ 3.5MHz |
| 电源电压： | 2.5 V ~ 25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LT3477
3A, DC/DC Converter
with Dual Rail-to-Rail
Current Sense
FEATURES
DESCRIPTION
n
n
n
n
n
n
n
n
n
n
Dual 100mV Rail-to-Rail Current Sense Ampli?ers
Wide Input Voltage Range: 2.5V to 25V
3A, 42V Internal Switch
High Ef?ciency Power Conversion: Up to 93%
Drives LEDs in Boost, Buck-Boost or Buck Mode
Frequency Set by External Resistor: 200kHz to 3.5MHz
Programmable Soft-Start
Low V CESAT Switch: 0.3V at 2.5A
Capable of Positive and Negative Output Voltages
(Boost, Inverting, SEPIC, Flyback)
Available in Thermally Enhanced 20-Lead
(4mm × 4mm) QFN and 20-Lead TSSOP Packages
The LT ? 3477 is a current mode, 3A DC/DC step-up con-
verter with dual rail-to-rail current sense ampli?ers and an
internal 3A, 42V switch. It combines a traditional voltage
feedback loop and two unique current feedback loops to
operate as a constant-current, constant-voltage source.
Both current sense voltages are set at 100mV and can be
adjusted independently using the I ADJ1 and I ADJ2 pins. Ef-
?ciency of up to 91% can be achieved in typical applications.
The LT3477 features a programmable soft-start function
to limit inductor current during start-up. Both inputs of
the error ampli?er are available externally allowing posi-
tive and negative output voltages (boost, inverting, SEPIC,
Flyback). The switching frequency is programmable from
High Power LED Driver
DSL Modems
Distributed Power
Input/Output Current Limited Boost, SEPIC,
APPLICATIONS
n
n
n
n
200kHz to 3.5MHz through an external resistor.
Available in thermally enhanced 20-pin (4mm × 4mm)
QFN and 20-pin TSSOP packages, the LT3477 provides a
complete solution for both constant-voltage and constant-
current applications.
n
Inverting, Flyback Converters
Constant-Voltage, Constant-Current Source
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
330mA LED Driver With Open LED Protection
Ef ?ciency
V IN
10μH
90
5V
3.3μF
I SP1
I SN1
SW
200k
3.3μF
85
V IN
I ADJ1
I ADJ2
FBN
10k
80
75
70
SHDN
SHDN
LT3477
I SP2
0.3Ω
65
V C
V REF
I SN2
R T
60
55
1k
FBP
GND
SS
330mA
50
0
0.1
0.2
0.3
0.4
4.7nF
33nF
22k
I OUT (A)
3477 TA01b
3477 TA01a
3477fc
1
相关PDF资料 |
PDF描述 |
|---|---|
| NCS6D4805C | CONVERT DC/DC +/-5V 600MA THRU |
| NCS6D4815C | CONVERT DC/DC +/-15V 200MA THRU |
| MSL1064AW-R | IC LED DRVR 6 CHAN PWM 24TQFN |
| NCS6D1215C | CONVERT DC/DC +/-15V 200MA THRU |
| LT3486IFE#TRPBF | IC LED DRVR WHITE BCKLGT 16TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3477IFE | 制造商:LINER 制造商全称:Linear Technology 功能描述:3A, DC/DC Converter with Dual Rail-to-Rail Current Sense |
| LT3477IFE#PBF | 功能描述:IC LED DRVR HP CONS CURR 20TSSOP 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 |
| LT3477IFE#TRPBF | 功能描述:IC LED DRVR HP CONS CURR 20TSSOP 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 |
| LT3477IUF | 制造商:LINER 制造商全称:Linear Technology 功能描述:3A, DC/DC Converter with Dual Rail-to-Rail Current Sense |
| LT3477IUF#PBF | 功能描述:IC LED DRVR HP CONST CURR 20-QFN 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 |
发布紧急采购，3分钟左右您将得到回复。