Datasheet 搜索 > 开发套件 > TI（德州仪器） > LM3552SDEV 数据手册 > LM3552SDEV 数据手册 1/23 页
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LM3552SDEV 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
开发套件
描述:
TEXAS INSTRUMENTS LM3552SDEV 评估板, 升压开关稳压器/发光二极管驱动器
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2Hot
典型应用电路图在P1P4P15
原理图在P7
封装尺寸在P18P20P21
标记信息在P18
封装信息在P18P19P20P21
技术参数、封装参数在P3P14P16
应用领域在P1P23
电气规格在P3P4P5P6P7P13
导航目录
LM3552SDEV数据手册
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LM3551/2
V
C
SW
FB
FET-T
FET-F
-+
R
T
R
F
D1
L1
R
C
C
C
SS
OVP
FTO
C
SS
SD/
EN
T/F
LUMILED
LXCL-PWF1
Flash LED
C
FTO
C
OUT
C
IN
V
BAT
V
IN
Sharp
GM5BW05340A
Flash LED
LM3551/2
V
C
SW
FB
FET-T
FET-F
-+
R
T
R
F
D1
L1
R
C
C
C
SS
OVP
FTO
C
SS
SD/
EN
T/F
C
OUT
C
FTO
C
IN
GND
V
IN
V
BAT
LM3551, LM3552
www.ti.com
SNVS371D –AUGUST 2005–REVISED MAY 2013
LM3551 /LM3552 1A White LED Driver with Flash Timeout Protection
Check for Samples: LM3551, LM3552
1
FEATURES
DESCRIPTION
The LM3551 and LM3552 are fixed frequency,
2
• Up to 1A Total Drive Current
current mode step-up DC/DC converters with two
• Flash Timeout Protection
integrated NFETs that can be used for precision LED
• Independent Torch/Flash/Shutdown Modes
brightness control. The devices are capable of driving
loads up to 1A from a single-cell Li-Ion battery.
• LED Disconnect in Shutdown
• Programmable Soft-Start Limits Inrush Current
The LM3551 and LM3552 can drive one or more high
current flash LEDs either in a high power Flash mode
• Over-Voltage Protection
or a lower power Torch mode using the
• Wide Voltage Range 2.7 to 5.5V
TORCH/FLASH pin. A programmable Timeout
• 1.25MHz Constant Switching Frequency
function on the FTO pin forces the internal NFETs to
turn off after a certain user defined time. An external
• Small, Low Profile Package, Non-Pullback
SD pin (LM3551) or EN pin (LM3552) is available to
WSON(4mm x 4mm)
put the device into low power shutdown mode. During
shutdown, the feedback resistors and the load are
APPLICATIONS
disconnected from the input to avoid leakage current
• White LED Camera Flash
paths to ground.
• White LED Torch (Flashlight)
User programmable soft-start circuitry has been
• DSC (Digital Still Camera) Flash integrated to eliminate large inrush currents at start-
up. Over-voltage protection circuitry and a 1.25MHz
• Cellular Camera Phone Flash
switching frequency allow for the use of small, low-
• PDA Camera Flash
cost output capacitors with lower voltage ratings. The
• Camcorder Torch (Flashlight) Lamp
LM3551 and LM3552 are available in a low profile 14-
pin WSON package.
Typical Application Circuits
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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