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参数资料
| 型号： | XRP6840BILB-F |
| 厂商： | Exar Corporation |
| 文件页数： | 11/17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
represent the DAC codes D2, D1, D0. They are
used to set the flash LED current levels in each
channel. Table 5 provides the DAC codes and
the corresponding nominal current levels for
each channel:
Addressing and Writing Data
To write data to the XRP6840 one of the
following two sequences is required:
Easy shutdown/startup sequence
D2-D0
Code
XRP6840A
I OUT /Ch. (mA)
D2-D0
Code
XRP6840B
I OUT /Ch. (mA)
[Slave Address with write bit][Data for Status]
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
0
400
586
770
948
1197
1291
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
0
597
875
1127
1400
1671
1910
Full shutdown/startup sequence
[Slave Address with write bit][Data for Status]
[Data for LEDFLASH][Data for LEDTORCH]
Slave address is ‘28’ Hex.
1
1
1 1445 1 1 1 2150
Table 5: Nominal Flash Mode Output Current
Addressing and Reading Data
LEDTORCH Register
LEDTORCH register bits B2 to B7, also
summarized in Table 1; they correspond to
LED1, LED2 and LED3. Bits B4, B3, B2, and
B1 represent the DAC codes D3, D2, D1, D0.
They are used to set the torch LED current
levels in each channel. Table 6 provides the
DAC codes and their corresponding nominal
current levels for each channel. Remember
that the total current that can be supported in
torch mode is 600mA divided by the gain of
the charge pump. If 2 channels are set to
440mA (a total of 880mA), even with a gain of
1X, the input current limit will clamp the total
current to approximately 600mA.
To read data from the XRP6840 the following
sequence is required:
[Slave Address with read bit][Data for Status]
[Data for LEDFLASH][Data for LEDTORCH]
D3-D0
Code
XRP6840A
I OUT /Ch. (mA)
D3-D0
Code
XRP6840B
I OUT /Ch. (mA)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
23
46
66
86
105
125
145
165
185
205
225
245
260
280
300
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
34
66
97
127
155
185
215
245
275
305
330
360
385
415
440
Table 6: Torch Mode Output Current
? 2009 Exar Corporation
11/17
Rev. 1.0.0
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| 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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