参数资料
型号: LT3465ES6#TRMPBF
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC LED DRIVR WHITE BCKLGT TSOT-6
标准包装: 1
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 800kHz ~ 1.6MHz
电源电压: 2.7 V ~ 16 V
输出电压: 30V
安装类型: 表面贴装
封装/外壳: SOT-23-6 细型,TSOT-23-6
供应商设备封装: TSOT-23-5
包装: 标准包装
工作温度: -40°C ~ 85°C
产品目录页面: 1339 (CN2011-ZH PDF)
其它名称: LT3465ES6#TRMPBFDKR
LT3465/LT3465A
1.2MHz/2.4MHz White
LED Drivers with Built-in
Schottky in ThinSOT
FEATURES
DESCRIPTIO
Inherently Matched LED Current
Drives Up to Six LEDs from a 3.6V Supply
No External Schottky Diode Required
1.2MHz Switching Frequency (LT3465)
2.4MHz Switching Frequency Above AM Broadcast
Band (LT3465A)
V IN Range: 2.7V to 16V
V OUT(MAX) = 30V
Automatic Soft-Start (LT3465)
Open LED Protection
High Efficiency: 81% (LT3465) 79% (LT3465A)
Typical
Requires Only 0.22 μ F Output Capacitor
Low Profile (1mm) SOT-23
The LT ? 3465/LT3465A are step-up DC/DC converters
designed to drive up to six LEDs in series from a Li-Ion cell.
Series connection of the LEDs provides identical LED
currents and eliminates the need for ballast resistors.
These devices integrate the Schottky diode required exter-
nally on competing devices. Additional features include
output voltage limiting when LEDs are disconnected, one-
pin shutdown and dimming control. The LT3465 has
internal soft-start.
The LT3465 switches at 1.2MHz, allowing the use of tiny
external components. The faster LT3465A switches at
2.4MHz. Constant frequency switching results in low input
noise and a small output capacitor. Just 0.22 μ F is required
for 3-, 4- or 5-LED applications.
APPLICATIO S
■ Cellular Phones
■ PDAs, Handheld Computers
■ Digital Cameras
The LT3465 and LT3465A are available in the low profile
(1mm) 6-lead SOT-23 (ThinSOT TM ) package.
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a
trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
MP3 Players
GPS Receivers
TYPICAL APPLICATIO
Conversion Efficiency
3V TO 5V
L1
22 μ H
82
V IN = 3.6V
80 4 LEDs
78
SW
V IN
V OUT
76
74
SHUTDOWN
AND DIMMING
CONTROL
C1
1 μ F
LT3465/
LT3465A
CTRL
GND
FB
10 ?
C2
0.22 μ F
72
70
68
66
C1, C2: X5R OR X7R DIELECTRIC
3465A F01a
L1: MURATA LQH32CN220
Figure 1. Li-Ion Powered Driver for Four White LEDs
64
62
60
0
5
10
15
LT3465
LT3465A
20
LED CURRENT (mA)
3465A F01b
3465afa
1
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