View BH1620FVC_4894795.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Ambient Light Sensor IC Series
Analog Current Output Type Ambient Light Sensor IC
BH1620FVC
No.09046EBT03
Descriptions BH1620FVC is an analog current output ambient light sensor. This IC 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 1.6 x 1.6 mm 2) Spectral sensitivity close to human eyes sensitivity. 3) Output current in proportion to brightness. 4) Supply voltage operates from 2.4V to 5.5V 5) Built-in shutdown function 6) 3 steps controllable output current gain. 7) 1.8V logic input interface 8) Low sensitivity variation (+/-15%)
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 7 -40~85 -40~100 7.5 165
Units V mA mW
70mm x 70mm x 1.6mm glass epoxy board. Derating at 2.2 mW/ for operating above Ta=25.
Operating Conditions Parameter VCC Voltage
Symbol Vcc
Min. 2.4
Typ. 3.0
Max. 5.5
Units V
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
1/9
2009.04 - Rev.B
BH1620FVC
Electrical Characteristics ( VCC = 3.0V, Ta = 25, unless otherwise noted ) Parameter Supply Current1 ( Operate ) Supply Current2 ( 0 lx ) Supply Current3 ( Shutdown ) IOUT Output Current1(Dark Current) IOUT Output Current2 Peak Wave Length Incandescent/Fluorescent Light Current Ratio Saturated Output Voltage GC1,GC2 Input `L' Voltage GC1,GC2 Input `H' Voltage1 GC1,GC2 Input `H' Voltage2 Wake-up Time Gain Ratio H-Gain Mode/M-Gain Mode Gain Ratio M-Gain Mode/L-Gain Mode
White LED is used as optical source
Technical Note
Symbol Icc1 Icc2 Icc3sd Iout1 Iout2 p rIF VOMAX VIL VIH1 VIH2 twu rHM rML
Min. 48.5 4.5 48.5 2.6 0 1.4 2.0 9.5 9.5
Typ. 71 9 0.2 57 560 1.0 2.9 45 10 10
Max. 97 13.5 0.4 0.2 65.5 3.0 0.4 Vcc Vcc 128 10.5 10.5
Units A A A A A nm times V V V V s times times
Conditions Ev=100 lx (H-Gain Mode) Ev=0 lx (H-Gain Mode) VGC1=V GC2=0 No Input Light Ev=0 lx Ev=100 lx (H-Gain Mode)
Ev=100 lx Ev=100 lx, RL=220k (H-Gain Mode)
2.4V VCC 3.6V 3.6V VCC 5.5V Shutdown H-Gain Mode Ev=100lx Ev=100lx Ev=100lx
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
2/9
2009.04 - Rev.B
BH1620FVC
Reference Data
100000
1.2 1.0 0.8
Technical Note
Fluorescent Light Incandescent Light Halogen Light
10000 1000
H-Gain M-Gain L-Gain
IOUT [ uA ]
100 10 1 0.1 0.01
Ratio
0.6 0.4 0.2 0.0
400 500 600 700 800 900 1000 1100
Kripton Light Artifical Sun Light White LED
0.001
0 0.5
Wavelength [ nm ]
Ratio
1
1.5
2
0.01 0
1
100
10,000
1,000,000
Illuminance [ lx ]
Fig.1 Spectral Response
Fig.2 Light Source Dependency ( Fluorescent Light is set to '1' )
1.2 1
Fig.3 Illuminance - IOUT Characteristics
100 10 IOUT [ uA ]
1.2 1
1pin
0.8
+
0.8
1pin
-
1 0.1 0.01
H-Gain M-Gain L-Gain SD
Ratio
0.6 0.4
+
Ratio
0.6 0.4 0.2 0
0.2 0
-90 -60 -30 0 30 60 90
+ +
-90 -60 -30 0 30 60 90
0.001 -40 -20 0 20 40 60 80 100 Ta [ ]
Angle [ deg ]
Angle [ deg ]
Fig.4 Directional Characteristics 1
Fig.5 Directional Characteristics 2
Fig.6 Ta - IOUT ( 0 lx )
100
1.4
1.4 1.2 1 0.8
10
H-Gain M-Gain L-Gain
Ratio
1.2 1
Ratio
ICC [ uA ]
1
0.8 0.6 0.4
0.1
SD
0.6 0.4 0.2 0
0.01
0.2
0.001 -40 -20 0 20 40 60 80 100
0
Ta [ ]
-40 -20 0 20 40 60 80 100
2
2.5
3
3.5
4
4.5
5
5.5
6
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 100 10 1 100 1000 Illuminance [ lx ] 10000
L-Gain M-Gain H-Gain
Fig.10 Illuminance - Wake up Time
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
3/9
2009.04 - Rev.B
BH1620FVC
Block Diagram
Technical Note
VCC GC1 GC2
Logic
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 / M-Gain / L-Gain ) Gain controllable in 3 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 M-Gain Mode L-Gain Mode
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
4/9
2009.04 - Rev.B
BH1620FVC
External parts Setting
1) Gain setting of BH1620FVC Please select the best gain controlled by 3 and 4pin based on the required illuminance range. The reference is as follows. Illuminance detection range [lx] ~1,000 ~10,000 ~100,000 Gain Mode H-Gain Mode M-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. Please set output resistance value( R1) within the range of 1 k~1M 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= 0.57 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[]. (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/(0.57 x 10 x Ev) -6 = 2 /(0.57 x 10 x 500) = 7018[] 6.8[k] (2) M-Gain mode Viout= 0.057 x 10-6 x Ev x R1 (3) L-Gain mode -6 Viout= 0.0057 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 (c) 2009 ROHM Co., Ltd. All rights reserved.
5/9
2009.04 - Rev.B
BH1620FVC
Terminal Descriptions PIN No. 1 Terminal Name VCC Equivalent Circuit Function Power Supply Terminal
Technical Note
2
GND
GND Terminal
VCC
3
GC1
Mode Setting Terminal 1
VCC
4
GC2
Mode Setting Terminal 2
VCC
5
IOUT
This terminal outputs current depending on illuminance level. Use this pin by putting resistor between GND.
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
6/9
2009.04 - Rev.B
BH1620FVC
Package Outlines
Technical Note
A A
Production code
Lot No.
WSOF5 ( Unit : mm )
Optical design for the device
0.8 mm
0.6 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 (c) 2009 ROHM Co., Ltd. All rights reserved.
7/9
2009.04 - Rev.B
BH1620FVC
Cautions on 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 parastic 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. Please mount by footprint dimensions described in the Jisso Information for WSOF5. This pad is GND pin, therefore there is a possibility that LSI malfunctions and heavy-current is generated.
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
8/9
2009.04 - Rev.B
BH1620FVC
Ordering part number
Technical Note
B
H
1
Part No.
6
2
0
F
V
C
-
T
R
Part No.
Package FVC: WSOF5
Packaging and forming specification TR: Embossed tape and reel
WSOF5

1.60.05 (0.8)
0.2MAX
Tape Quantity Direction of feed
Embossed carrier tape 3000pcs TR
The direction is the 1pin of product is at the upper right when you hold
1.20.05 (MAX 1.28 include BURR)
1.00.05
(0.05)
(0.3)
1.60.05
5
4
4
5
(0.91)
(0.41)
( reel on the left hand and you pull out the tape on the right hand
1pin
)
123
321
0.130.05 S
0.6MAX
+0.03 0.02 -0.02
0.1 0.5 0.220.05
S 0.08
M
Direction of feed
(Unit : mm)
Reel
Order quantity needs to be multiple of the minimum quantity.
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
9/9
2009.04 - 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. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com (c) 2009 ROHM Co., Ltd. All rights reserved.
R0039A

▲Up To Search▲

Price & Availability of BH1620FVC

	To Download BH1620FVC Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .