Optical Proximity Sensor ICs 1chip Optical Proximity + Ambient Light Sensor IC BH1772GLC No.12100EFT12 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 2 1) Correspond to I C bus interface ( f/s 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) Built in ambient light cancelation (Proximity sensor function) 8) Built in configurable IrLED current driver Applications Mobile phone, DSC, Portable game, Camcoder, PDA, LCD display etc. Absolute Maximum Ratings ( Ta = 25 ) Parameter Symbol Ratings Units VCC, Supply Voltage Vccmax 4.5 V VSDAmax, VSCLmax, SDA,SCL,GNDNC Terminal Voltage 4.5 V VGNDNCmax LEDC,INT Terminal Voltage VLEDCmax, VINTmax 7 V Operating Temperature Topr -4085 Storage Temperature Tstg -40100 SDA, INT Sink Current Imax 7 mA Power Dissipation Pd 250 mW 70mm 70mm 1.6mm glass epoxy board. Decreasing rate is 3.33mW/ for operating above Ta=25 Operating Conditions Ratings Parameter Symbol Units Min. Typ. Max. VCC Voltage Vcc 2.3 2.5 3.6 V LEDC Terminal Voltage Vledc 0.7 2.5 5.5 V www.rohm.com 2012. 06 - Rev.F 1/29 2012 ROHM Co., Ltd. All rights reserved. BH1772GLC Technical note Electrical characteristics ( Vcc = 2.5V, Ta = 25, unless otherwise noted. ) Limits Parameter Symbol Units Conditions Min. Typ. Max. 1 Ev = 100 lx Average current when ALS CONTROL Supply current for ALS Icc1 90 180 A register(40h) = 03h and the other registers are default. Average current when PS CONTROL Supply current for PS Icc2 90 180 A register(41h) = 03h and the other registers are default. Supply current Icc3 6.5 8.5 mA for PS during driving LED current ALS & PS standby Standby mode current Icc4 0.8 1.5 A No Input Light ALS measurement time tMALS 100 125 ms H-Resolution mode 1 ALS measurement accuracy S/A 0.85 1.0 1.15 Times Sensor out / Actual lx, Ev = 1000 lx ALS dark ( 0 lx ) sensor out ALS0 0 0 2 count H-Resolution mode PS sensor out 2 PS0 0 0 30 count Ambient irradiance = 0W/cm (No proximity object) PS sensor out (Irradiance 2 PS324u 120 128 136 count Ambient irradiance = 0W/cm 2 by proximity object = 324uW/cm ) ILED pulse duration twILED 200 250 s PS measurement time tMPS 10 12.5 ms LEDC terminal sink current ILED register(42h) ILEDC 18 20 22 mA at LEDC terminal voltage = 1.3V 2:0 = 010 INT output L Voltage VINT 0 0.4 V IINT = 3mA SCL SDA input H Voltage VIH 1.26 V SCL SDA input L Voltage VIL 0.54 V SCL SDA input H /L Current IIHL -10 10 A 2 I C SDA output L Voltage VOL 0 0.4 V IOL = 3mA 1 White LED is used as optical source www.rohm.com 2012. 06 - Rev.F 2/29 2012 ROHM Co., Ltd. All rights reserved.