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参数资料
| 型号： | BH1750FVI-TR |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC AMBIENT LIGHT SENSOR WSOF6 |
| 特色产品： | Ambient Light Sensor ICs |
| 标准包装： | 1 |
| 带接近传感器： | 无 |
| 波长： | 560nm |
| 电源电压： | 2.4 V ~ 3.6 V |
| 输出类型： | I²C? |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-SMD，扁平引线裸焊盘 |
| 包装： | 标准包装 |
| 其它名称： | BH1750FVI-DKR BH1750FVI-DKR-ND BH1750FVIDKR |
BH1750FVI
Technical Note
ex 4) LPF using CR is inserted between VCC and DVI.
This method has the possibility that the Reset section of turning on the power supply can not satisfied. cannot be satisfied.
Please design the set considering the characteristic of the power supply enough.
R1 : 1kOhm
BH1750FVI
VCC
SCL
0.1μF
ADDR
GND
DVI
SDA
C1 : 1μF
◆ Notes when CR is inserted between VCC and DVI
※ Please note that there is a possibility that reset section ( 1μs ) can not be satisfied because the power supply is turned on when the rise time of VCC is slow
※ When VCC is turned off, the DVI voltage becomes higher than VCC voltage but IC destruction is not occred if recommended constant
( R1 = 1kOhm, C1 = 1μF ) is used.
※ Please note that there is a possibility that Reset section (1μsec) cannot be satisfied if wait time is not enough long after turning off VCC.
(It is necessary to consider DVI voltage level after turning off VCC.)
0V
t1
t2
Reset
2.4V
0.4V
Section : 1us or more
V CC
DVI
* Please
do the application design to secure Reset section 1us or more after the reclosing of the power supply.
◆ Example of designing set when CR ( C = 1μF, R = 1k ? ) is inserted between VCC and DVI with VCC=2.8V
① The rise time to 0 → 2.4V of VCC must use the power supply of 100μs or less.
② Please wait 25ms or more after VCC turn off ( VCC <= 0.05V ), because it is necessary to secure reset section
( 1μs or more ).
Rise time of power supply : 100us or less
2.8V
Time to power supply reclosing : 25ms or more
れ
2.4V
0.4V
V CC
DVI
0V
0.05V
Reset Section : 1us or more
*
Please do the application design to secure Reset section 1us or more after the reclosing of the power supply.
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? 2011 ROHM Co., Ltd. All rights reserved.
9/17
2011.11 - Rev.D
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