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參數(shù)資料
| 型號(hào)： | LT3486EFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Dual 1.3A White LED Step-Up Converters with Wide Dimming |
| 中文描述： | 1.3 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 839K |
| 代理商： | LT3486EFE |
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
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3486EFE#PBF | 功能描述:IC LED DRVR WHITE BCKLGT 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:60 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?線性（LDO），PWM，升壓（升壓） 輸出數(shù):8 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:RGB，白色 LED 頻率:500kHz ~ 1.5MHz 電源電壓:4.75 V ~ 26 V 輸出電壓:45V 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* 工作溫度:-40°C ~ 85°C |
| LT3486EFE#TRPBF | 功能描述:IC LED DRVR WHITE BCKLGT 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?開路漏極，PWM 輸出數(shù):4 內(nèi)部驅(qū)動(dòng)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(yīng)商設(shè)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 |
| LT3486EFEPBF | 制造商:Linear Technology 功能描述:Dual 1.3A White LED dim driver,LT3486 |
| LT3486IFE#PBF | 功能描述:IC LED DRVR WHITE BCKLGT 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?開路漏極，PWM 輸出數(shù):4 內(nèi)部驅(qū)動(dòng)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(yīng)商設(shè)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 |
| LT3486IFE#PBF | 制造商:Linear Technology 功能描述:LED DRIVER BOOST PWM 1MHZ 制造商:Linear Technology 功能描述:LED DRIVER, BOOST, PWM, 1MHZ, TSSOP-16 |
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