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PDF BH1772GLC Data sheet ( Hoja de datos )
| Número de pieza | BH1772GLC | |
| Descripción | 1 Chip Optical Proximity Sensor + Ambient Light Sensor IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Ambient Light Sensor ICs
1 Chip Optical Proximity Sensor +
Ambient Light Sensor IC
BH1772GLC
No.11046EBT12
●Descriptions
BH1772GLC is the IC into which optical proximity sensor and digital ambient light senor are unified. Proximity sensor part
detects the human or object approach by reflection of infrared LED(IrLED) light. Ambient light sensor part can detect the
wide range illuminance from the dark up to under direct sun light. The illuminant intensity of LCD display and keypad can be
adjusted, so lower current consumption or higher visibility are possible.
●Features
1) Correspond to I2C bus interface ( f/s mode & Hs mode support )
2) Low Current by power down function
3) Correspond to 1.8V logic interface
4) ALS spectral responsibility is approximately human eye response ( Peak wavelength : typ. 550nm )
5) Correspond to wide range of light intensity ( 1-65535 lx range )
6) Rejecting 50Hz/60Hz light noise (ALS function)
7) Detection range of proximity sensor is around 10 - 100mm (configurable by I2C bus)
8) Built in ambient light cancelation (Proximity sensor function)
9) Built in configurable IrLED current driver
●Applications
Mobile phone, DSC, Portable game, Camcoder, Car navigation, PDA, LCD display etc.
●Absolute Maximum Ratings ( Ta = 25℃ )
Parameter
Symbol
Ratings
VCC, Supply Voltage
SDA,SCL,GNDNC Terminal Voltage
LEDC,INT Terminal Voltage
Vccmax
VSDAmax, VSCLmax,
VGNDNCmax
VLEDCmax, VINTmax
4.5
4.5
7
Operating Temperature
Topr -40～85
Storage Temperature
Tstg -40～100
SDA, INT Sink Current
Imax
7
Power Dissipation
Pd 250※
※ 70mm × 70mm × 1.6mm glass epoxy board. Decreasing rate is 3.33mW/℃ for operating above Ta=25℃
Units
V
V
V
℃
℃
mA
mW
●Operating Conditions
Parameter
VCC Voltage
LEDC Terminal Voltage
Symbol
Vcc
Vledc
Ratings
Min. Typ. Max.
2.3 2.5 3.6
0.7 2.5 5.5
Units
V
V
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/30
2011.06 - Rev.B
1 page  
BH1772GLC
●Reference Data
1.2
1.0
0.8
0.6
0.4
0.2
0.0
400 500 600 700 800 900 1000 1100
Wavelength [ nm ]
Fig.1 ALS Spectral Response
64
56
48
40
32
24
16
8
0
0 8 16 24 32 40 48 56 64
Illuminance [ lx ]
Fig.2 Illuminance -
ALS Measurement Result
Technical note
100000
10000
1000
100
10
1
1 10 100 1000 10000 100000
Illuminance [ lx ]
Fig.3 Illuminance -
ALS Measurement Result 2
1.2
1
1pin
0.8 - +
0.6
0.4
-+
0.2
0
-90 -60 -30 0 30 60 90
Angle [ deg ]
Fig.4 ALS Directional Characteristics 1
1.2
1
0.8
0.6
0.4
0.2
0
-40 -20 0 20 40 60 80 100
Ta [ ℃ ]
Fig.7 ALS Measurement Accuracy
Temperature Dependency
1.2
1
0.8
0.6
0.4
0.2
0
2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
VCC [ V ]
Fig.10 ALS Measurement Result
VCC Dependency
1.2
1
0.8
-
0.6 - 1pin
0.4
+
0.2
+
0
-90 -60 -30 0 30 60 90
Angle [ deg ]
Fig.5 ALS Directional Characteristics 2
Fluorescent
Light
Incandescent
Light
Halogen Light
Kripton Light
Artifical Sun
Light
White LED
0
0.5 1 1.5
Ratio
2
Fig.8 ALS Light Source Dependency
( Fluorescent Light is set to '1' )
1.20
1.00
0.80
0.60
0.40
0.20
0.00
400 500 600 700 800 900 1000 1100
Wavelength [nm]
Fig.11 PS Spectral Response
10
8
蛍光灯白熱灯感度比
6
4
2
0
-40 -20 0 20 40 60 80 100
Ta [ ℃ ]
Fig.6 ALS Dark Response
200
150
100
50
0
2 2.5 3 3.5 4
VCC [ V ]
Fig.9 VCC - ICC
( During ALS measurement )
1.2
1
1pin
0.8 - +
0.6
0.4 - +
0.2
0
-90 -60 -30
0
30 60 90
Angle [ deg ]
Fig.12 PS Directional Characteristics 1
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
5/30
2011.06 - Rev.B
5 Page 
BH1772GLC
Technical note
●Proximity sensor measurement sequence
The below figure shows proximity sensor measurement sequence. First PS measurement is triggered by I2C bus master
writes measurement command to PS_CONTROL register ( 41h ).
1. Forced mode
PS measurement is done only 1time and PS trigger bit ( 44h<0> ) is overwritten from 'H' to 'L' after PS measurement
complete. PS measurement is re-started by master writes PS trigger bit to 'H'.
2. Stand alone mode
PS measurement is continuously done until master select the other mode. Measurement interval is defined at
PS_MEAS_RATE register ( 45h ).
start LED
measurement
start LED
measurement
tMPS
PS meas rate
twILED
twILED :
tMPS :
PS meas rate :
LED current pulse duration, please refer P2 ( Electrical Characteristics ).
Proximity sensor measurement time, please refer P2 ( Electrical Characteristics ).
Measurement result is generated in this term.
In case of stand alone mode, It is defined at PS_MEAS_RATE register ( 45h ).
In case of forced mode, it means the term until overwriting PS trigger bit to ‘H’.
●Ambient light sensor measurement sequence
The below figure shows ambient light sensor measurement sequence. First ALS measurement is triggered by I2C bus
master writing measurement command to ALS_CONTROL register ( 40h ).
1. Forced mode
ALS measurement is done only 1time and ALS trigger bit( 44h<1> ) is overwritten from 'H' to 'L' after ALS measurement
is completed. ALS measurement is re-started by master writes ALS trigger bit to 'H'.
2. Stand alone mode
ALS measurement is continuously done until master select the other mode. Measurement interval is defined at
ALS_MEAS_RATE register ( 46h ). If ALS rate disable bit ( 46h<7> ) is ‘H’, there is no interval between measurement.
start
measurement
start
measurement
ALS meas rate
tMALS
tMALS :
Ambient light sensor measurement time, please refer P2 ( Electrical Characteristics ).
Measurement result is generated in this term.
ALS meas rate: In case of stand alone mode, It is defined at ALS_MEAS_RATE register ( 46h )
In case of forced mode, it means the term until overwriting ALS trigger bit to ‘H’.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
11/30
2011.06 - Rev.B
11 Page | ||
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