參數(shù)資料
型號： LT3486
廠商： Linear Technology Corporation
英文描述： Dual 1.3A White LED Step-Up Converters with Wide Dimming
中文描述： 雙1.3a標準白光LED升壓轉(zhuǎn)換器具有較寬的亮度調(diào)節(jié)，
文件頁數(shù)： 1/20頁
文件大?。?/td> 839K
代理商： LT3486
LT3486
1
3486f
■
Wide (1000:1) PWM Dimming Range with No
ColorShift
■
Independent Dimming and Shutdown Control of the
LED Drivers
■
Drives Up to 16 White LEDs at 25mA (8 per Driver)
from a Single Li-Ion Cell
■
Drives Up to 16 White LEDs at 100mA (8 per Driver)
from 12V Supply
■
±3% LED Current Programming Accuracy
■
Open LED Protection: 36V Clamp Voltage
■
Fixed Frequency Operation: Up to 2MHz
■
Wide Input Voltage Range: 2.5V to 24V
■
Low Shutdown Current: I
CC
< 1μA
■
Overtemperature Protection
■
Available in (5mm
×
3mm
×
0.75mm) 16-Pin DFN
and 16-Pin Thermally Enhanced TSSOP Packages
Dual 1.3A White LED
Step-Up Converters with
Wide Dimming
DESCRIPTIO
U
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 2MHz 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.
Li-Ion Powered Driver for Camera Flash and LCD Backlighting
Efficiency vs V
IN
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patent Pending.
FEATURES
APPLICATIU
■
Notebook PC Display
■
LED Camera Light for Cell Phones
■
Car Dashboard Lighting
■
Avionics Displays
TYPICAL APPLICATIO
U
V
IN
(V)
3
65
E
70
75
80
85
90
3.2
3.4
3.6
3.8
3486 TA01b
4
4.2
MOVIE MODE
I
LED1
= 175mA
FLASH MODE
I
LED1
= 320mA
8 LEDS/25mA
V
3V TO 4.2V
10
μ
F
L1
10
μ
H
L2
10
μ
H
0.1
μ
F
2.2
μ
F
63.4k
2.8k
4.7nF
R
8.06
R
0.62
2.2
μ
F
0.1
μ
F
3486 TA01a
100k
LED1
AOT3218
25mA
8 LEDs
OFF ON
OFF ON
DIMMING 2
V
C1
V
C2
R
T
SW1
SW2
OVP2
V
IN
LT3486
CTRL2
REF
PWM2
FB2
OVP1
CTRL1
SHDN
PWM1
FB1
DIMMING 1
相關(guān)PDF資料
PDF描述
LT3486EDHC Dual 1.3A White LED Step-Up Converters with Wide Dimming
LT3486EFE Dual 1.3A White LED Step-Up Converters with Wide Dimming
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3486_08 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 1.3A White LED Step-Up Converters with Wide Dimming
LT3486EDHC 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 1.3A White LED Step-Up Converters with Wide Dimming
LT3486EDHC#PBF 功能描述:IC LED DRIVR WHITE BCKLGT 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數(shù):4 內(nèi)部驅(qū)動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3486EDHC#TRPBF 功能描述:IC LED DRIVR WHITE BCKLGT 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標準包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓撲:開路漏極，PWM 輸出數(shù):4 內(nèi)部驅(qū)動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應商設備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3486EFE 制造商:Linear Technology 功能描述:LED DRVR 16Segment 3.3V/5V/9V/12V/15V/18V 16-Pin TSSOP EP
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