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参数资料
| 型号： | LTC3220IPF-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR QVGA DISPLAY 28UTQFN |
| 标准包装： | 2,500 |
| 拓扑： | 开路漏极，升压（升压），切换式电容器（充电泵） |
| 输出数： | 18 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | LED 闪烁器 |
| 频率： | 850kHz ~ 1.05MHz |
| 电源电压： | 2.9 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-UFQFN 裸露焊盘 |
| 供应商设备封装： | 28-UTQFN（4x4）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
LTC3220/LTC3220-1
360mA Universal
18-Channel LED Driver
FEATURES
DESCRIPTION
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Eighteen 20mA 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 Interface
Low Noise Multi-Mode Charge Pump (1x, 1.5x, 2x)
Provides Up to 91% Ef?ciency
Slew Limited Switching Reduces Conducted and
Radiated Noise (EMI)
Up to 360mA Total Output Current
Internal Current Reference
Single Reset Pin for Asynchronous Shutdown and
Reset of All Data Registers
Two I 2 C Addresses Are Available (LTC3220: 0011100,
LTC3220-1: 0011101)
Automatic or Forced Mode Switching
Internal Soft-Start Limits Inrush Current
Short-Circuit/Thermal Protection
4mm × 4mm Ultrathin (0.55mm) 28-Lead QFN
Package
The LTC3220/LTC3220-1 are highly integrated multi-display
LED drivers. These parts contain a high ef?ciency, low noise
charge pump to provide power to up to eighteen universal
LED current sources. The LTC3220/LTC3220-1 require
only ?ve small ceramic capacitors to form a complete
LED power supply and current controller.
The LED currents are set by an internal precision cur-
rent reference. Independent dimming, on/off, blinking
and gradation control for all universal current sources
is achieved via the I 2 C serial interface. 6-bit linear DACs
are available to adjust brightness levels independently for
each universal LED current source.
The LTC3220/LTC3220-1 charge pump optimizes ef?ciency
based on the voltage across the LED current sources. The
part 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
parts into 1.5x mode and a subsequent dropout switches
the LTC3220/LTC3220-1 into 2x mode. The parts reset to
1x mode whenever a data bit is updated via the I 2 C port.
APPLICATIONS
L , 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.
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Video Phones with QVGA+ Displays
Keypad Lighting
General/Miscellaneous Lighting
TYPICAL APPLICATION
6-LED Main, 4 RGB LEDs
C2
2.2μF
C3
2.2μF
C1P C1M C2P C2M
RGB1
RGB2
RGB3
RGB4
MAIN
V IN
C1
2.2μF
V IN
LTC3220
LTC3220-1
CPO
C4
4.7μF
18
DV CC
DV CC
ULED1-18
I 2 C
0.1μF
SCL/SDA
3220 TA01
RESET
RST
GND
32201fc
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3220IPF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:360mA Universal 18-Channel LED Driver |
| LTC3220IPF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:360mA Universal 18-Channel LED Driver |
| LTC3221 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Regulated Charge Pump in 2 】 2 DFN |
| LTC3221-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Regulated Charge Pump in 2 】 2 DFN |
| LTC3221-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower, Regulated Charge Pump in 2 】 2 DFN |
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