Rohm BH1730FVC-TR Technical Notes

Ambient Light Sensor ICs
Digital 16bit Serial Output Type
Ambient Light Sensor IC
BH1730FVC
●Descriptions
BH1730FVC is a digital Ambient Light Sensor IC for I
data for adjusting LCD backlight power of TV, mobile phone. It is possible to detect very wide range light intensity. (0.008 -
65535 lx ).
●Features
2
1) I C bus Interface ( f / s Mode Support, Slave address "0101001". )
2) There are two outputs that peaks of a spectrum response are in visible light (Type0) and in infrared light (Type1).
3) Illuminance to Digital Converter
4) Very wide range and High resolution. ( 0.008 - 65535 lx )
5) Low Current by power down function
6) 50Hz / 60Hz light noise reject-function
7) Correspond to 1.8V logic input interface
8) Light source dependency is little by calculating with Type0 and Type1.
( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light )
9) Interrupt function is available.
10) Adjustable measurement result for influence of optical window
( It is possible to detect min. 0.001 lx, max. 100000 lx by using this function. )
11) Small measurement variation (+/- 15%)
12) Built in power on reset circuit.
●Applications
LCD TV, Mobile phone, NOTE PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display
●Absolute Maximum Ratings
Parameter
Supply Voltage
INT , SDA, DVI, SCL, Terminal Voltage
Operating Temperature
Storage Temperature
SDA, INT Sink Current
Power Dissipation
※ 70mm × 70mm × 1.6mm glass epoxy board. Derating in done at 3.47mW/℃ for operating above Ta=25℃.
●Operating Conditions
Parameter
VCC Voltage
2
I C Reference Voltage
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2
C bus interface. This IC is the most suitable to obtain the ambient light
Symbol
V max
CC
V max, V max, V max, V
INT SDA DVI
Topr
Tstg
Imax
Pd
Symbol Min.
Vcc 2.4
V 1.65
DVI
1/20
BH1730FVC
Limits Units
4.5
max 7
SCL
-40～70
-40～100
7 mA
260 ※ mW
Typ. Max. Units
3.0 3.6
- V
CC
2012.02 - Rev.A
No.11046EAT13
V
V
℃
℃
V
V