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參數(shù)資料
| 型號(hào)： | LT3466 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual Full Function White LED Step-Up Converter with Built-In Schottky Diodes |
| 中文描述： | 全功能雙白光LED升壓內(nèi)置肖特基二極管轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 1/20頁(yè) |
| 文件大小： | 324K |
| 代理商： | LT3466 |
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1
LT3466
3466f
Dual Full Function White LED
Step-Up Converter with
Built-In Schottky Diodes
Figure 1. Li-Ion Powered Driver for 8/8 White LEDs
I
Drives Up to 20 White LEDs (10 in Series
per Converter) from a 3.6V Supply
I
Two Independent Step-Up Converters Capable of
Driving Asymmetric LED Strings
I
Independent Dimming and Shutdown Control
of the Two LED Strings
I
Internal Schottky Diodes
I
Internal Soft-Start Eliminates Inrush Current
I
Open LED Protection (42V Max V
OUT
)
I
Fixed Frequency Operation Up to 2MHz
I
81% Efficiency Driving 16 White LEDs at 15mA
(Eight per Driver) from a 3.6V Supply
I
Wide Input Voltage Range: 2.7V to 24V
I
Tiny (3mm
×
3mm) 10-Lead DFN Package
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
Main/Sub Displays
I
Digital Cameras, Sub-Notebook PCs
I
PDAs, Handheld Computers
I
Automotive
LT
3466 is a dual full function step-up DC/DC converter
specifically designed to drive up to 20 White LEDs (10 in
series per converter) with a constant current. Series
connection of the LEDs provides identical LED currents
resulting in uniform brightness and eliminating the need
for ballast resistors and expensive factory calibration.
The two independent converters are capable of driving
asymmetric LED strings. The dimming of the two LED
strings can also be controlled independently. The LT3466
is ideal for providing backlight for main and sub-displays
in cell phones and other handheld devices.
The LT3466 operating frequency can be set with an
external resistor over a 200kHz to 2MHz range. A low
200mV feedback voltage minimizes power loss in the
current setting resistor for better efficiency. Additional
features include output voltage limiting when LEDs are
disconnected and internal soft-start.
The LT3466 is available in a low profile, small footprint
(3mm
×
3mm
×
0.75mm) DFN package.
CTRL1
GND CTRL2
R
T
SW1
V
OUT1
SW2
V
OUT2
V
IN
3V TO 5V
47
μ
H
1
μ
F
2.2
μ
F
2.2
μ
F
LED1
LED2
47
μ
H
LT3466
SHUTDOWN
AND DIMMING
CONTROL 2
SHUTDOWN
AND DIMMING
CONTROL 1
FB1
10
10
3466 F01a
FB2
63.4k
Conversion Efficiency
LED CURRENT (mA)
0
E
70
75
20
3466 F01b
60
50
65
55
5
10
15
85
V
= 3.6V
8/8 LEDs
80
DESCRIPTIOU
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3466-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:20mA LED Driver and OLED Driver with Integrated Schottky in 3mm x 2mm DFN |
| LT3466EDD | 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:否 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 |
| LT3466EDD#PBF | 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN 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 |
| LT3466EDD#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, DFN-10 |
| LT3466EDD#TR | 功能描述:IC LED DRIVR WHITE BCKLGT 10-DFN RoHS:否 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 |
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