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参数资料
| 型号： | XRP6840BILB-F |
| 厂商： | Exar Corporation |
| 文件页数： | 6/17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： | 2 |
| 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： | 1016-1336 |
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
PIN DESCRIPTION
Name
C GND
RDY
SCL, SDA
P GND
RESET_N
LED 1 , LED 2 , LED 3
(XRP6840A)
LED 1 , NC, LED 2
(XRP6840B)
FLASH
NC
GND
CAP
V OUT
C 2P , C 2N
C 1P , C 2P
V IN
Thermal Pad
Pin Number
1
2
3, 4
5, 11
6
7, 8, 9
7, 8, 9
10
12
13
14
15
16, 17
18, 19
20
-
Description
Charge pump ground pin.
Active high push-pull output. RDY is high when V OUT reached to 100mV below its
V OUT_LIMIT voltage. The V OUT_LIMIT for Flash mode is determined by STATUS2 register [B7
B6 B5]. The V OUT_LIMIT for Torch mode is 4.50V.
The SDA and SCL pins connect to the I 2 C bus. Multiple functions can be programmed
through his interface. They can also be used for read-back.
Power ground pin. The Source of internal NMOS is connected to this pin.
Active Low input pin.
If RESET_N = 0, then XRP6840 is in Shut-down mode
If RESET_N = 0 and STATUS1 register [B5] = 0, then reset all registers to logic low.
If RESET_N = 0 and STATUS1 register [B5] = 1, then all bits of all registers will be
saved.
LED 1 , LED 2 , LED 3 connect to the drain of the internal NMOS which are current sources
for LED current. These current sources are controlled by LEDFLASH or LEDTORCH
registers which is programmed through I 2 C to provide the Torch and Flash current for
the LEDs. LED 1 , LED 2 , LED 3 pins can be connected together to provide higher LED
current. If a pin is not used connect it to V OUT . The XRP6840 incorporates a short LED
protection circuit which shut-down LED current if LED voltage approaches to V OUT_LIMIT .
Digital Input pin. Active high. If STATUS1 register [B7 B6] = 11 and FLASH = 1 then
LEDs are ON for one Flash timeout duration. Flash Timeout duration is controlled by
STATUS1 register [B1 B0].
No connection. This pin can be connected to P GND pin for heat sink.
Ground pin. This ground pin doesn’t carry high internal current.
This pin is the output of an internal Op-Amp. This internal Op-Amp is powered by V OUT .
The output voltage is half of V OUT , and output resistance is 470 ? . The sink and source
current is limited by 470 ? output resistance. This provides active balancing between
two internal sections of the super capacitor.
Output voltage. Connect positive terminal of SuperCap here. Connect the LEDs
between this pin and the corresponding internal current source. Decouple with 10μF
ceramic capacitor close to the pins of the IC.
Connect C 2 external flying capacitor between these pins.
Connect C 1 external flying capacitor between these pins.
Power supply input. Decouple with 10μF ceramic capacitor close to the pins of the IC.
Connect thermal pad to P GND pins.
ORDERING INFORMATION
Part Number
XRP6840AILB-F
XRP6840AILBTR-F
XRP6840BILB-F
XRP6840BILBTR-F
Junction
Temperature
Range
-40°C ≤ T A ≤ +125°C
-40°C ≤ T A ≤ +125°C
-40°C ≤ T A ≤ +125°C
-40°C ≤ T A ≤ +125°C
Marking
6840AI
YYWWX
6840AI
YYWWX
6840BI
YYWWX
6840BI
YYWWX
Package
20-pin TQFN
20-pin TQFN
20-pin TQFN
20-pin TQFN
Packing
Quantity
Bulk
3K/Tape & Reel
Bulk
3K/Tape & Reel
Note 1
RoHS Compliant/
Halogen Free
RoHS Compliant/
Halogen Free
RoHS Compliant/
Halogen Free
RoHS Compliant/
Halogen Free
Note 2
3 Channels
3 Channels
2 Channels
2 Channels
XRP6840EVB
XRP6840 Evaluation
Board – XRP6840A based.
“YY” = Year – “WW” = Work Week – “X” = Lot Number
? 2009 Exar Corporation
6/17
Rev. 1.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| XRP7410EHTR-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 |
| XRP7410ERB-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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