EEWORLDEEWORLDEEWORLD

Part Number

Search

LT3755IUD#TRPBF

Description
IC LED DRIVER CTRLR DIM 16QFN
Categorysemiconductor    Power management   
File Size340KB,26 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LT3755IUD#TRPBF Overview

IC LED DRIVER CTRLR DIM 16QFN

LT3755IUD#TRPBF Parametric

Parameter NameAttribute value
typeDC DC controller
TopologyFlyback, SEPIC, Buck, Boost
internal switchnone
Number of outputs1
Voltage - Power supply (minimum)4.5V
Voltage - Power Supply (Highest)40V
Voltage - Output75V
Current - Output/Channel-
frequency100kHz ~ 1MHz
DimmingAnalog, PWM
application-
Operating temperature-40°C ~ 125°C (TJ)
Installation typesurface mount
Package/casing16-WFQFN Exposed Pad
Supplier device packaging16-QFN-EP(3x3)
LT3755/LT3755-1/LT3755-2
40V
IN
, 75V
OUT
LED Controllers
FeaTures
3000:1 True Color PWM™ Dimming
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
n
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.
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.
applicaTions
n
n
n
High Power LED
Battery Chargers
Accurate Current Limited Voltage Regulators
Typical applicaTion
50W White Automotive LED Headlamp Driver
V
IN
8V TO
40V
22µH
4.7µF
1M
185k
V
IN
SHDN/UVLO
V
REF
332k
CTRL
INTV
CC
100k
40.2k
LT3755-2
ISN
GATE
OPENLED
PWM
SS
PWMOUT
RT
V
C
GND INTV
CC
10k
0.001µF
37551 TA01a
Efficiency vs V
IN
100
1M
4.7µF
FB
ISP
0.1
1A
23.7k
96
EFFICIENCY (%)
50W
LED
STRING
92
SENSE
88
0.015
84
80
0.01µF
28.7k
375kHz
4.7µF
0
10
20
V
IN
(V)
30
40
37551 TA01b
37551fd

About the problem of wince 5.0 sdk and vs2005
This is my first time installing the development environment of wince 5.0. I don't know how to install it. I would like to ask how everyone installed the development environment of wince 5.0. I instal...
csw20066 Embedded System
How to measure the phase of square waves with the same frequency using stm32f103
How to measure the phase of square waves with the same frequency using stm32f103? Please give me the program...
a36326253 stm32/stm8
How to use mc39i to surf the Internet
I am a software developer and I don't know anything about hardware. Now I want to make a program to access the Internet through GPRS and PPP. If any brother can give me an example or document, I would...
shen001 Embedded System
X-NUCLEO-IDB04A1 (Bluetooth Expansion Board) Data Summary
[i=s] This post was last edited by dcexpert on 2014-12-17 14:34 [/i] [b][size=3]X-NUCLEO-IDB04A1 (Nucleo low-power Bluetooth expansion board) information summary [/size][/b] Continuously updated [list...
dcexpert MCU
How to use ICDI debugging for LM4F120 development board?
I just got the official development board of LM4F120, using MDK4.12 and ICDI for DEBUG. Every time I debug, the following picture appears. How can I solve this problem?...
sun9091 Microcontroller MCU
Various simulations, a little unclear
The relationship between RTL-level simulation, gate-level simulation, layout and routing simulation, post-simulation, pre-simulation, functional simulation and timing simulation is not very clear. Can...
超自然 FPGA/CPLD

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1452  1613  2106  2225  388  30  33  43  45  8 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号