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| 型号： | XRP6840AILB-F |
| 厂商： | Exar Corporation |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC LED FLASH DVR I2C 20TQFN |
| 特色产品： | XRP6840 4.3 A Flash LED Driver |
| 标准包装： | 1 |
| 拓扑： | 切换式电容器（充电泵） |
| 输出数： | 3 |
| 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： | 2MHz ~ 2.8MHz |
| 电源电压： | 2.7 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-TQFN（4x4） |
| 包装： | 散装 |
| 工作温度： | -40°C ~ 85°C |
| 配用： | 1016-1337-ND - EVAL BOARD FOR XRP6840 |
| 其它名称： | 1016-1335 |
X R P 6 8 4 0
4 . 3 A S u p e r c a p a c i t o r F l a s h L E D D r i v e r w i t h I 2 C
December 2009
GENERAL DESCRIPTION
The XRP6840 is a controlled-current dual-cell
supercapacitor charger and high power LED
driver. Operating from a standard lithium-ion
battery, the XRP6840 provides up to 4.3A of
programmable Flash LED current and up to
600mA and 5.6V of programmable
supercapacitor charging current and voltage.
Architectured around a 2.4MHz tri-mode 1x,
1.5x and 2x charge pump, the XRP6840
charges the stacked supercapacitor to the
programmed output voltage with no more
than 600mA drawn from the battery. While
charging, an internal active balance circuitry
insures matching of the stacked capacitors’
voltages.
A standard 2-line I 2 C serial interface allows
the dynamic programming of LED currents in
torch and flash modes, flash timeout, channel
enable, gain control, capacitor charge voltage,
and enable. The XRP6840 comes in a 2 and 3
channel version supporting respectively
440mA/2.15A per channel and 300mA/1.45A
in torch/flash modes.
The flexibility designed into the XRP6840 can
also allow it to reverse the power flow back to
the input to prevent unintended system resets
as the battery voltage drops.
The XRP6840 is available in a lead-free,
“green”/halogen free 20-pin TQFN package.
Rev. 1.0.0
APPLICATIONS
? High Power Torch/Strobe/Flash LED
? High Resolution Cameras
? Generic High Power Lighting
? High Power White LED Backlighting
FEATURES
? Programmable 4.3A Flash LED Driver
? Torch and Flash Modes
? 2 and 3 Channels Versions
? Programmable Supercapacitor Charger
? 600mA Adjustable Charging Current
? Programmable Supercapacitor Voltage
? In-rush Current Control
? Active Voltage Balance Control
? Tri-mode Charge Pump Architecture
? 1x, 1.5x, 2x Operation Modes
? 2.4MHz Switching Frequency
? I 2 C Serial Interface
? Thermal, Over Current and Output
Short Protection
? LED Short Detection
? RoHS Compliant “Green”/Halogen Free
20-pin 4mmx4mm TQFN package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP6840 – 3 Channels Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRP6840AILBTR-F | 功能描述:LED照明驱动器 4.3A Supercap. Flash 3-Ch LED Drivr w/I2C RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| XRP6840BILB-F | 功能描述:LED照明驱动器 4.3A Supercap. Flash 2-Ch LED Drivr w/I2C RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| XRP6840BILBTR-F | 功能描述:LED照明驱动器 4.3A Supercap. Flash 2-Ch LED Drivr w/I2C RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| XRP6840EVB | 功能描述:LED 照明开发工具 Eval Board for XRP6840 Series RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| XRP7410EH-F | 功能描述:开关变换器、稳压器与控制器 Controller RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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