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参数资料
| 型号： | LTC3219EUD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR QVGA DISPLAY 20-QFN |
| 标准包装： | 121 |
| 拓扑： | 开路漏极，升压（升压），切换式电容器（充电泵） |
| 输出数： | 9 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | LED 闪烁器 |
| 频率： | 650kHz ~ 1.05MHz |
| 电源电压： | 2.9 V ~ 5.5 V |
| 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（3x3） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1340 (CN2011-ZH PDF) |
LTC3219
250mA Universal
Nine Channel LED Driver
FEATURES
DESCRIPTION
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Multimode Charge Pump Provides Up to 91%
Ef?ciency
Slew Limited Switching Reduces Conducted and
Radiated Noise (EMI)
Up to 250mA Total Output Current
Nine 28mA Universal Current Sources with 64-Step
Linear Brightness Control
Independent On/Off, Brightness Level, Blinking and
Gradation Control for Each Current Source Using
2-Wire I 2 C TM Interface
Internal Current Reference
Con?gurable ENU Pin for Asynchronous LED On/Off
Control
Low Noise Charge Pump Operates in 1x, 1.5x or 2x
Mode for Optimal Ef?ciency*
Automatic or Forced Mode Switching
Internal Soft-Start Limits Inrush Current
Short-Circuit/Thermal Protection
3mm × 3mm 20-Lead QFN Plastic Package
The LTC ? 3219 is a highly integrated multidisplay LED
driver. The device contains a high ef?ciency, low noise
charge pump to provide power to nine universal LED
current sources. The LTC3219 requires only ?ve small
ceramic capacitors to form a complete LED power supply
and current controller.
The maximum display currents are set by an internal pre-
cision current reference. Independent dimming, On/Off,
blinking and gradation control for all current sources is
achieved via the I 2 C serial interface. 6-bit linear DACs are
available for adjusting brightness levels for each universal
LED current source.
The LTC3219 charge pump optimizes ef?ciency based on
the voltage across the LED current sources. The device
powers up in 1x mode and will automatically switch to
boost mode whenever any enabled LED current source
begins to enter dropout. The ?rst dropout switches the
IC into 1.5x mode and a subsequent dropout switches
APPLICATIONS
the LTC3219 into 2x mode. The part resets to 1x mode
whenever a data register is updated via the I 2 C port.
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Video Phones with QVGA+ Displays
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Protected by U.S. Patents, including 6411531.
TYPICAL APPLICATION
4-LED Main, 2-LED Sub and RGB
C2
1μF
C3
1μF
C1P C1M C2P C2M
MAIN
SUB
RGB
V BAT
C1
2.2μF
V BAT
LTC3219
CPO
C4
2.2μF
I 2 C
DV CC
2
SCL/SDA
DV CC
ULED1-9
9
3219 TA01a
0.1μF
ENABLE DISABLE
ENU
GND
3219fa
1
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| LTC3454EDD#TRPBF | IC LED DRIVER PHOTO FLASH 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3219EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:250mA Universal Nine Channel LED Driver |
| LTC3220 | 制造商:LINER 制造商全称:Linear Technology 功能描述:360mA Universal 18-Channel LED Driver |
| LTC3220_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:360mA Universal 18-Channel LED Driver |
| LTC3220-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:360mA Universal 18-Channel LED Driver |
| LTC3220EPF#PBF | 功能描述:IC LED DRVR QVGA DISPLAY 28UTQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
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