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参数资料
| 型号： | LT3486IFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16TSSOP |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 200kHz ~ 2.25MHz |
| 电源电压： | 2.5 V ~ 24 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
LT3486
Wide (1000:1) PWM Dimming Range with No
Independent Dimming and Shutdown Control of the
Drives Up to 16 White LEDs at 25mA (8 per Driver)
Drives Up to 16 White LEDs at 100mA (8 per Driver)
±3% LED Current Programming Accuracy
Open LED Protection: 36V Clamp Voltage
Fixed Frequency Operation: Up to 2.5MHz
Wide Input Voltage Range: 2.5V to 24V
Low Shutdown Current: ICC < 1μA
Overtemperature Protection
Available in (5mm × 3mm × 0.75mm) 16-Pin DFN
Notebook PC Display
LED Camera Light for Cell Phones
Car Dashboard Lighting
Avionics Displays
FEATURES
n
ColorShift
n
LED Drivers
n
from a Single Li-Ion Cell
n
from 12V Supply
n
n
n
n
n
n
n
and 16-Pin Thermally Enhanced TSSOP Packages
APPLICATIONS
n
n
n
n
Dual 1.3A White LED
Step-Up Converters with
Wide Dimming
DESCRIPTION
The LT ? 3486 is a dual step-up DC/DC converter
specifically designed to drive up to 16 White LEDs (8 in
series per converter) at constant current from a single
Li-Ion cell. Series connection of the LEDs provides identi-
cal LED currents resulting in uniform brightness. The two
independent converters are capable of driving asymmetric
LED strings.
The dimming of the two LED strings can be controlled
independently via the respective CTRL pins. An internal
dimming system allows the dimming range to be extended
up to 1000:1 by feeding a PWM signal to the respective
PWM pins. The LT3486 operating frequency can be set with
an external resistor over a 200kHz to 2.5MHz range. A low
200mV feedback voltage (±3% accuracy) minimizes power
loss in the current setting resistor for better efficiency.
Additional features include output voltage limiting when
LEDs are disconnected and overtemperature protection.
The LT3486 is available in a space saving 16-pin DFN
(5mm × 3mm × 0.75mm) and 16-pin thermally enhanced
TSSOP packages.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
TYPICAL APPLICATION
Li-Ion Powered Driver for Camera Flash and LCD Backlighting
V IN
3V TO 4.2V
10μF
90
Efficiency vs V IN
2.2μF
LED1
AOT3218
DIMMING 1
SW1
OVP1
CTRL1
L1
10μH
V IN
L2
10μH
SW2
OVP2
CTRL2
2.2μF
DIMMING 2
8 LEDs
25mA
85
80
MOVIE MODE
I LED1 = 175mA
FLASH MODE
I LED1 = 320mA
OFF ON
SHDN
PWM1
LT3486
REF
PWM2
0.1μF
75
OFF ON
100k
R FB1
0.62
FB1
V C1
GND R T
0.1μF
63.4k
FB2
V C2
2.8k
4.7nF
R FB2
8.06
3486 TA01a
70
65
3
8 LEDS/25mA
3.2 3.4
3.6
V IN (V)
3.8
4
4.2
3486 TA01b
3486fe
1
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相关代理商/技术参数 |
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|---|---|
| LT3487 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Boost and Inverting Switching Regulator for CCD Bias |
| LT3487EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Boost and Inverting Switching Regulator for CCD Bias |
| LT3487EDD#PBF | 功能描述:IC REG BOOST INV ADJ 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3487EDD#PBF | 制造商:Linear Technology 功能描述:Switching Regulator IC 制造商:Linear Technology 功能描述:IC DUAL BOOST/INVERTING REGULATOR DFN-10 |
| LT3487EDD#TRPBF | 功能描述:IC REG BOOST INV ADJ 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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