BH1600FVC

Ambient Light Sensor IC Series Analog Current Output Type Ambient Light Sensor IC BH1600FVC No.10046EBT04 ●Descriptions BH1600FVC is an analog current output ambient light sensor. BH1600FVC is the most suitable to obtain the ambient light data for adjusting LCD and Keypad backlight of Mobile phone for power saving and better visibility ●Features 1) Compact surface mount package 3.0 × 1.6 mm 2) Spectral sensitivity close to human eyes sensitivity. 3) Output current in proportion to brightness. 4) Minimum supply voltage 2.4V 5) Built-in shutdown function 6) 2 steps controllable output current gain. 7) 1.8V logic input interface ●Applications Mobile phone, LCD TV, PDP TV, Laptop PC, Portable game console, Digital camera, Digital video camera, Car navigation, PDA, LCD display ●Absolute Maximum Ratings Parameter Supply Voltage Operating Temperature Storage Temperature Iout Current Power Dissipation Symbol Vmax Topr Tstg Ioutmax Pd Limits 4.5 -30～85 -40～100 7.5 260※ Units V ℃ ℃ mA mW ※ 70mm × 70mm × 1.6mm glass epoxy board. Derating at 3.47mW/℃ for operating above Ta=25℃. ●Operating Conditions Parameter VCC Voltage Symbol Vcc Min. 2.4 Typ. 3.0 Max. 3.6 Units V ●Electrical Characteristics ( VCC = 3.0V, Ta = 25℃, unless otherwise noted ) Parameter Symbol Min. Typ. Max. Supply Current Icc1 39 64 90 Shutdown Current Icc2sd 0.01 0.2 Dark Current Idark 0.1 Light Current Iout 39 60 81 Peak Wave Length λp 560 Incandescent/Fluorescent rIF 1.0 Light Current Ratio Saturated Output Voltage GC1, GC2 Input ‘L’ Voltage GC1,GC2 Input ‘H’ Voltage Wake-up Time Gain Ratio H-Gain Mode / L-Gain Mode ※ White LED is used as optical source Units µA µA µA µA nm times V V V µs times Conditions Ev=100 lx ( H-Gain Mode ) ※ VGC1=VGC2=0 No Input Light Ev=0 lx Ev=100 lx ( H-Gain Mode ) ※ Ev=100 lx Ev=100 lx, RL=220kΩ ( H-Gain Mode ) ※ Vomax VIL VIH twu 2.6 0 1.4 - 2.9 64 9.5 3.0 0.4 Vcc 128 10 Shutdown → H-Gain Mode Ev=100lx ※ Ev=100 lx ※ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/8 2010.03 - Rev.B BH1600FVC ●Reference Data 1.2 Fluorescent Light Technical Note 100000 10000 1000 1 Incandescent Light Halogen Light H-Gain L-Gain IOUT [ uA ] 0.8 100 10 1 0.1 0.01 Ratio 0.6 Kripton Light 0.4 Artifical Sun Light 0.2 White LED 0 400 500 600 700 800 900 1000 1100 0 0.5 1 1.5 2 0.001 0.01 0 1 100 10,000 1,000,000 Wavelength [ nm ] Ratio Illuminance [ lx ] Fig.1 Spectral Response 1.2 1 Fig.2 Light Source Dependency (Fluorescent Light is set to '1') 1.2 1 Fig.3 Illuminance – IOUT Characteristics 100 10 IOUT [ uA ] 1pin 0.8 + 受信指向角特性 0.8 暗電流温特 - 1 0.1 0.01 Ratio 0.6 0.4 + Ratio 0.6 0.4 + 1pin H-Gain L-Gain SD 0.2 0 -90 -60 -30 0 30 60 90 0.2 + 0.001 -30 0 30 Ta [ ℃ ] 60 90 60 90 0 -90 -60 -30 0 30 Angle [ deg ] Angle [ deg ] Fig.4 Directional Characteristics 1 Fig.5 Directional Characteristics 2 Fig.6 Ta – IOUT (0 lx) 100 1.4 1.2 1 1.4 1.2 1 0.8 10 ICC [ uA ] 1 Ratio 0.1 H-Gain L-Gain Ratio -30 0 30 60 90 0.8 0.6 0.4 0.2 0.6 0.4 0.2 0 2 2.5 3 3.5 4 0.01 SD 0.001 -30 0 0 Ta [ ℃ ] 30 60 90 Ta [ ℃ ] VCC [ V ] Fig.7 Ta – ICC (0 lx) Fig.8 IOUT Temperature dependency(100 lx) Fig.9 IOUT VCC dependency 10000 WakeupTime [ us ] 1000 L-Gain 100 10 H-Gain 1 100 1000 Illuminance [ lx ] 10000 Fig.10 Illuminance – Wake up Time www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/8 2010.03 - Rev.B BH1600FVC ●Block Diagram VCC Technical Note GC1 Logic GC2 PD Current Amp IOUT R1 C1 GND ●Block Diagram Descriptions ●PD Photo diode close to human eyes sensitivity. ●Current AMP To amplify Photo diode current ( H-Gain / L-Gain ) Gain controllable in 2 steps by input voltage from GC1 and GC2. ●Logic Logic block for mode setting by input voltage from GC1 and GC2 ●Mode Setting GC2 0 0 1 1 GC1 0 1 0 1 Mode Shutdown H-Gain Mode L-Gain Mode Test Mode ( Input prohibition ) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/8 2010.03 - Rev.B BH1600FVC ●External parts Setting 1) Gain setting of BH1600FVC Please select the best gain controlled by 5 and 6pin based on the required illuminance range. The reference is as follows. Illuminance detection range [lx] ~ 500 ~50000 Gain Mode H-Gain Mode L-Gain Mode Technical Note This device will be mounted under the optical window in actual designing. Therefore, there is a possibility that the illuminace to ALS( Ambient Light Sensor) will be less than the illuminance on the final product surface. Please consider the attenuation of light through the optical window. It is possible to detect illuminance up to about 5000 lx even in the H-Gain mode. However, the maximum output current is about 3mA in this case. If you want to minimize consumption current, please use the L-Gain mode as much as possible. Please set output resistance value( R1) within the range of 1 kΩ ~ 1MΩ which needs to be smaller than the input impedance of the next circuit. 2) Approximate formula of IOUT output voltage in each Gain Mode (1) H-Gain mode The output voltage is calculated as below. -6 Viout= 0.6 x 10 x Ev x R1 Viout is IOUT output voltage [V]. Ev is an illuminance of the ALS surface [lx]. R1 is IOUT output resistor[Ω]. (For example) In case you want to convert the illuminance value up to 500 lx by ADC. If the maximum voltage of ADC input is 2V, output resistor value will be as below. -6 R1 = Viout/(0.6 x 10 x Ev) -6 = 2 /(0.6 x 10 x 500) = 6667[Ω] ⇒6.8[kΩ] (2) L-Gain mode The output voltage is calculated as follows. -6 Viout= 0.063 x 10 x Ev x R1 3) C1 (1) To reject the flicker light.. In case IOUT output is R1 only and an ALS receives the artificial lights such as fluorescent lamps and incandescent lamps synchronized with 50/60 Hz of AC power supplies, the output current has a ripple. If you want to reject this ripple, please add C1 to R1 in parallel. Please set it to C1 x R1 = about 0.1 as a time constant. (2) To control backlight smoothly by using illuminance value. C1 is effective to control backlight smoothly for a rapid changing of the illuminance. In this case, please set it to C1 x R1 = about 1 ~ 10 as a time constant. It is not necessary if you average illuminance value with software to change backlight smoothly. Please note that the rise time becomes slow at power-on and recovery from shutdown mode to operation mode. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/8 2010.03 - Rev.B BH1600FVC ●Terminal Descriptions Pin No. Pin Name VCC Technical Note Equivalent Circuit Function 1 IOUT This terminal outputs current depending on illuminance level. Use this pin by putting resistor between GND. 2 GND GND Terminal 3 VCC Power Supply Terminal 4 NC NC( Non connection)Terminal Open or short to GND VCC 5 GC1 Mode Setting Terminal 1 VCC 6 GC2 Mode Setting Terminal 2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/8 2010.03 - Rev.B BH1600FVC ●Package Outlines Technical Note Lot No. A A Production code WSOF6 ( Unit : mm ) ●Optical design for the device 0.8 mm 1.3 mm Min.0.4 mm Min.0.4 mm PD area ( 0.25 mm x 0.3 mm ) Please design an optical window to have the focused light within this area. Min.0.4 mm Min.0.4 mm www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/8 2010.03 - Rev.B BH1600FVC ●Notes for use Technical Note 1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage ( Vmax ), temperature range of operating conditions ( Topr ), etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. 2) GND voltage Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient. 3) Short circuit between terminals and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the ICs can break down. 4) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. 5) Inspection with set PCB On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress. Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the transportation and the storage of the set PCB. 6) Input terminals In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to handle the input terminals; such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. 7) Thermal design Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (pd) in actual states of use. 8) Treatment of package Dusts or scratch on the photo detector may affect the optical characteristics. Please handle it with care. 9) Rush current When power is first supplied to this IC, rush current may flow instantaneously. Because it is possible that the charge current to the parasitic capacitance of internal photo diode or the internal logic may be unstable. Therefore, give special consideration to power coupling capacitance, power wiring, width of GND wiring, and routing of connections. 10) The exposed central pad on the back side of the package There is an exposed central pad on the back side of the package. But please do it non connection. ( Don't solder, and don't do electrical connection ) Please mount by Footprint dimensions described in the Jisso Information for WSOF6. This pad is GND level, therefore there is a possibility that LSI malfunctions and heavy-current is generated. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/8 2010.03 - Rev.B BH1600FVC ●Ordering part number Technical Note B H 1 Part No. 1600 6 0 0 F V C - T R Part No. Package FVC: WSOF6 Packaging and forming specification TR: Embossed tape and reel (WSOF6) WSOF6 1.6±0.1 (MAX1.8 include BURR) 2.6±0.1 (MAX2.8 include BURR) 6 5 4 4 5 6 Tape Quantity (0.45) Embossed carrier tape 3000pcs TR The direction is the 1pin of product is at the upper right when you hold 3.0±0.1 Direction of feed (1.5) (1.4) 1 2 3 3 2 1 (0.15) (1.2) ( reel on the left hand and you pull out the tape on the right hand 1pin ) 0.3 0.75MAX 1PIN MARK 0.145±0.05 S 0.08 S 0.5 0.22±0.05 0.08 M Direction of feed (Unit : mm) Reel ∗ Order quantity needs to be multiple of the minimum quantity. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/8 2010.03 - Rev.B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. 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