參數(shù)資料
型號： LTC3205
廠商： Linear Technology Corporation
元件分類： LED驅(qū)動器
英文描述： Single Cell 350mA LED Driver
中文描述： 單細胞350mA的LED驅(qū)動器
文件頁數(shù)： 1/12頁
文件大?。?/td> 123K
代理商： LTC3205
1
LTC3490
3490f
■
Portable Lighting
■
Rechargeable Flashlights
Single Cell Minimum Component LED Driver
Single Cell 350mA
LED Driver
■
350mA Constant Current Output
■
2.8V to 4V Output Compliance
■
1- or 2-Cell NiMH or Alkaline Input
■
Synchronous Rectification: Up to 90% Efficiency
■
Fixed Frequency Operation: 1.3MHz
■
Low Quiescient Current: <1mA
■
Very Low Shutdown Current: <50
μ
A
■
Open LED Output Limited to 4.7V
■
V
IN
Range: 1V to 3.2V
■
Dimming Control
■
Undervoltage Lockout to Protect Batteries
■
Low Profile (0.75mm) 3mm
×
3mm Thermally
Enhanced 8-Lead DD and S8 Packages
APPLICATIU
Efficiency vs V
IN
at V
LED
= 3.5V
FEATURES
DESCRIPTIOU
The LTC
3490 provides a constant current drive for 1W
LED applications. It is a high efficiency boost converter
that operates from 1 or 2 NiMH or alkaline cells and
generates 350mA of constant current with up to 4V of
compliance. It contains a 100m
NFET switch and a
130m
PFET synchronous rectifier. The fixed switching
frequency is internally set to 1.3MHz.
The LTC3490 limits the output voltage to 4.7V if the output
load is disconnected. It also features an analog dimming
capability that reduces the drive current proportional to
the CTRL/SHDN pin voltage. A low-battery logic output
signals when the battery has dropped below 1V/cell. An
undervoltage lockout circuit shuts down the LTC3490
when the battery voltage drops below 0.85V/cell. The
feedback loop is internally compensated to minimize com-
ponent count.
TYPICAL APPLICATIO
U
+
SW
CAP
ON/OFF
LED
1 NiMH OR
ALKALINE
CELL
4.7
μ
F
LOBAT
3490 TA01
V
IN
CTRL/SHDN
CELLS
1M
HIGH
CURRENT
LED
GND
LTC3490
3.3
μ
H
350mA
V
IN
(V)
1
0
E
10
30
40
50
100
70
1.5
2
3490 TA02
20
80
90
60
2.5
3
I
OUT
= 350mA
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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相關代理商/技術參數(shù)
參數(shù)描述
LTC3205EUF 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:否 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
LTC3205EUF#PBF 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN 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
LTC3205EUF#TR 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN RoHS:否 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
LTC3205EUF#TRPBF 功能描述:IC LED DRVR WT/RGB BCKLGT 24-QFN 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
LTC3205EUFPBF 制造商:Linear Technology 功能描述:Multidisplay LED Controller,LTC3205
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