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LM3552SD/NOPB 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
LED驱动器
封装:
WFDFN-14
描述:
TEXAS INSTRUMENTS LM3552SD/NOPB 芯片, 白光二极管驱动器, 升压, LLP-14
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
LM3552SD/NOPB数据手册
Page:
of 23 Go
若手册格式错乱，请下载阅览PDF原文件
LM3551/2
V
IN
V
C
GND
SW
FB
FET-T
FET-F
-+
C
IN
C
OUT
R
T
R
F
D1
R
C
C
C
V
BAT
SS
OVP
C
FTO
FTO
C
SS
SD/EN
T/F
Sharp
GM5BW05340A
Flash LED
4.7 PF
16V
10 PF
10V
4.7 PH
R
C
= 27 k:
C
C
= 10 nF
LM3551/2
SD/
EN
T/F
V
IN
V
C
GND
SW
FB
FET-T
FET-F
C
IN
C
OUT
R
T
R
F
D1
R
C
C
C
V
BAT
SS
OVP
C
FTO
FTO
LUMILED
LXCL-PWF1
Flash LED
10 Fµ
16V
10 Fµ
10V
C
SS
4.7 µH
R
C
= 10 kΩ
C
C
= 4.7 nF
+
–
LM3551, LM3552
www.ti.com
SNVS371D –AUGUST 2005–REVISED MAY 2013
THERMAL PROTECTION
Internal thermal protection circuitry disables the LM3551/2 when the junction temperature exceeds +140°C (typ.).
This feature protects the device from being damaged by high die temperatures that might otherwise result from
excessive power dissipation. The device will recover and operate normally when the junction temperature falls
below +120°C (typ.). It is important that the board layout provide good thermal conduction to keep the junction
temperature within the specified operating ratings.
PCB LAYOUT CONSIDERATIONS
The WSON is a leadframe based Chip Scale Package (CSP) with very good thermal properties. This package
has an exposed DAP (die attach pad) at the center of the package measuring 2.6mm x 3.0mm. The main
advantage of this exposed DAP is to offer lower thermal resistance when it is soldered to the thermal land pad
on the PCB. For PCB layout, Texas Instruments highly recommends a 1:1 ratio between the package and the
PCB thermal land. To further enhance thermal conductivity, the PCB thermal land may include vias to a ground
plane. For more detailed instructions on mounting WSON packages, please refer to Application Note AN-1187
(SNOA401)
Application Examples
TYPICAL CONFIGURATIONS
Figure 16. LUMILED LXCL-PWF1
R
T
= 5.6Ω, R
F
= 2.2Ω
I
TORCH
= 200mA, I
FLASH
= 700mA
Figure 17. SHARP GM5BW05340A
R
T
= 17Ω, R
F
= 6.5Ω
I
TORCH
= 75mA, I
FLASH
= 250mA
Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 15
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