参数资料
型号: LT3003EMSE#PBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC LED DRIVER BALLASTER 10-MSOP
标准包装: 50
拓扑: PWM,降压(降压),升压(升压)
输出数: 3
内部驱动器:
类型 - 主要: 车载,背光
电源电压: 3 V ~ 40 V
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)裸露焊盘
供应商设备封装: 10-MSOP 裸露焊盘
包装: 管件
工作温度: -40°C ~ 125°C
LT3003
3-Channel LED
Ballaster with PWM
FEATURES
DESCRIPTION
3% LED Current Matching
Up to 350mA Continuous Current per LED String
Up to 3000:1 True Color PWM TM Dimming Range
PWM Input Disconnects LED Strings
Can Operate in Buck, Boost and Buck-Boost Modes
Wide Input Range: 3V to 40V
Overtemperature Outputs
Works with LT1618, LT3477, LT3474, LT3475,
LT3476, LTC ? 3783
Thermally Enhanced 10-Pin MSOP Package
The LT ? 3003 drives three separate strings of LEDs up
to 350mA/channel with 3% accurate current matching,
resulting in uniform LED brightness and intensity. This
approach is superior to conventional methods of running
three separate channels with external ballast resistors
requiring expensive factory calibration.
The LT3003 operates in boost, buck and buck-boost mode.
A True Color PWM Dimming ratio of up to 3000:1 is achiev-
able using a logic-level signal at the PWM pin for all modes
without the need for external level-shifting circuitry. For
APPLICATIONS
applications with input supply above and below the output
voltage of the LED strings, the LT3003 allows the LEDs to
High Power LED Ballaster
Automotive Lighting
Video Cameras
TFT LCD Backlighting
be returned to the input supply (buck-boost mode) instead
of being limited to only SEPIC solutions.
The LT3003 is ideal for high power LED driver applications
such as TFT LCD backlighting and heads-up displays. Ad-
ditional overtemperature outputs allow appropriate system
management for increased reliability.
The LT3003 is available in a small 10-pin MSE package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
True Color PWM is a trademark of Linear Technolology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
PV IN
Buck Mode LT3003 with the LT3476
90
Ef?ciency
32V
1 μ F
0.1 ?
8 × 3 = 24 LEDs
350mA PER STRING
85
80
LED1
V MAX
LED2
LED3
V IN
75
PWM
DIMMING
SHDN
PWM
GND
LT3003
OT1 OT2
V EE
1 μ F
70
65
V IN
3V TO 16V
10 μ F
CAP LED PWM
V IN SIMPLIFIED LT3476
GND
V C
SW
1nF
10 μ H
0.33 μ F
3003 TA01a
60
0
PV IN = 32V
NUMBER OF LEDS = 8 × 3 = 24
200 400 600 800 1000
TOTAL LED CURRENT (mA)
1200
3003 TA01b
3003fa
1
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