- 您现在的位置：买卖IC网 > Datasheet目录338 > LTC3452EUF#TRPBF (Linear Technology)IC LED DRIVER PHOTO FLASH 20-QFN Datasheet资料下载
参数资料
| 型号： | LTC3452EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER PHOTO FLASH 20-QFN |
| 标准包装： | 2,500 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 7 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 900kHz ~ 1.1MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 4.5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LTC3452
APPLICATIO S I FOR ATIO
Although the LTC3452 can safely provide this current
continuously, the external LED(s) may not be rated for this
high a level of continuous current. Higher current levels in
a single LED are generally reserved for pulsed applica-
tions, such as LED camera flash. This is accomplished by
programming a high current with one or both of the R ISET
resistors and pulsing the appropriate enable pin or pins as
shown in the back page application.
Varying LED Brightness Linearly
Continuously variable LED brightness control can be
achieved by interfacing directly to one or both of the I SET
pins. Figure 3 shows four such methods employing a
voltage DAC, a current DAC, a simple potentiometer or a
PWM input applied to the I SETL pin for controlling the low
power bank LED currents. These four techniques can be
similarly applied to the I SETH pin for controlling the high
power bank LED currents.
V IN
EN L
LED L1
LTC3452
V OUT
V IN
EN L
LED L1
LTC3452
V OUT
I SETL
LED L5
I SETL
LED L5
VOLTAGE
DAC
R SET ≥ R MINL
V DAC
I LED = 256
0.8V – V DAC
R SET
CURRENT
DAC
IDAC ≤
0.8V
R MINL
I LED = 256 ? IDAC
(3a)
(3b)
V IN
EN L
LED L1
LTC3452
V OUT
V IN
EN L
LED L1
LTC3452
V OUT
I SETL
LED L5
I SETL
LED L5
R MINL
I LED = 256
0.8V
R MINL + R POT
R SET
100
R SET ≥ R MINL
I LED = 256
0.8V – V PWM
R SET
R POT
V PWM
1 μ F
= 256
0.8V – (DC% ? V DVCC )
R SET
DV CC
f PWM ≥ 10kHz
(3c)
(3d)
3452 F03
Figure 3. Additional Brightness Control Methods: (3a) Using Voltage DAC,
(3b) Using Current DAC, (3c) Using Potentiometer, (3d) Using PWM Input
3452f
13
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3453EUF#TRPBF | IC LED DRIVER PHOTO FLASH 16-QFN |
| LTC3454EDD#TRPBF | IC LED DRIVER PHOTO FLASH 10-DFN |
| LTC3490EDD#PBF | IC LED DRIVER PHOTO FLASH 8-DFN |
| LTC3783EFE#PBF | IC LED DRVR PWM CONTROL 16-TSSOP |
| LV5026MC-AH | IC LED DRIVER 1CH HV 10SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3453 | 制造商:LINER 制造商全称:Linear Technology 功能描述:700mA Low Noise High Current LED Charge Pump |
| LTC3453EUF | 制造商:Linear Technology 功能描述:LED DRVR 4Segment 3.3V/5V 16-Pin QFN EP |
| LTC3453EUF#PBF | 功能描述:IC LED DRIVER PHOTO FLASH 16-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LTC3453EUF#TRPBF | 功能描述:IC LED DRIVER PHOTO FLASH 16-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LTC3454 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1A Synchronous Buck-Boost High Current LED Driver |
发布紧急采购，3分钟左右您将得到回复。