1/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. ambient light sensor ics analog current output type ambient light sensor ic bh1600fvc 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 controllabl e 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, pda, lcd display absolute maximum ratings parameter symbol limits units supply voltage vmax 4.5 v operating temperature topr -30 85 storage temperature tstg -40 100 iout current ioutmax 7.5 ma power dissipation pd 260 mw 70mm 70mm 1.6mm glass epo xy board. derating at 3.47mw/ for operating above ta=25 . operating conditions parameter symbol min. typ. max. units v cc voltage vcc 2.4 3.0 3.6 v electrical characteristics ( v cc = 3.0v, ta = 25 , unless otherwise noted ) parameter symbol min. ty p. max. units conditions supply current icc1 39 64 90 a ev=100 lx ( h-gain mode ) shutdown current icc2sd - 0.01 0.2 a v gc1 =v gc2 =0 no input light dark current idark - - 0.1 a ev=0 lx light current iout 39 60 81 a ev=100 lx ( h-gain mode ) peak wave length p - 560 - nm incandescent/fluorescent light current ratio rif - 1.0 - times ev=100 lx saturated output voltage vomax 2.6 2.9 3.0 v ev=100 lx, rl=220k ? ( h-gain mode ) gc1, gc2 input ?l? voltage v il 0 - 0.4 v gc1,gc2 input ?h? voltage v ih 1.4 - vcc v wake-up time twu - 64 128 s shutdown h-gain mode ev=100lx gain ratio h-gain mode / l-gain mode - 9.5 10 times ev=100 lx white led is used as optical source no.12046edt04
bh1600fvc technical note 2/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 -30 0 30 60 90 ta [ ] ratio 0.001 0.01 0.1 1 10 100 -30 0 30 60 90 ta [ ] icc [ ua ] 1 10 100 1000 10000 100 1000 10000 illuminance [ lx ] wakeuptime [ us ] reference data 0.001 0.01 0.1 1 10 100 -30 0 30 60 90 ta [ ] iout [ ua ] fig.9 i out v cc dependency fig.2 light source dependency (fluorescent light is set to '1') fig.8 i out temperature dependency(100 lx) fig.1 spectral response fig.3 illuminance ? i out characteristics fig.4 directional characteristics 1 fig.5 directional characteristics 2 fig.6 ta ? i out (0 lx) fig.7 ta ? i cc (0 lx) fig.10 illuminance ? wake up time ? 0 0.2 0.4 0.6 0.8 1 1.2 -90 -60 -30 0 30 60 90 angle [ deg ] ratio 0 0.2 0.4 0.6 0.8 1 1.2 -90 -60 -30 0 30 60 90 angle [ deg ] ratio h-gain l-gain h-gain l-gain l-gain h-gain sd h-gain l-gain sd - + - + 1pin 1pin 0 0.2 0.4 0.6 0.8 1 1.2 400 500 600 700 800 900 1000 1100 wavelength [ nm ] ratio 00.511.52 fluorescent light incandescent light halogen light kripton light artifical sun light white led ratio 0 0.2 0.4 0.6 0.8 1 1.2 1.4 2 2.5 3 3.5 4 vcc [ v ] ratio - + - + 0. 001 0. 01 0. 1 1 10 100 1000 10000 100000 0 1 100 10,000 1,000,000 iout [ ua ] 0.01 illuminance[lx]
bh1600fvc technical note 3/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. block diagram 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 gc1 mode 0 0 shutdown 0 1 h-gain mode 1 0 l-gain mode 1 1 test mode ( input prohibition ) vcc gc1 pd iout r1 current amp gnd logic gc2 c1
bh1600fvc technical note 4/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. 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] gain mode ~ 500 h-gain mode ~50000 l-gain mode this device will be mounted under the optical window in actual designing. therefore, ther e 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 consumpt ion current, please use the l-gain mode as much as possible. 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. viout= 0.6 x 10 -6 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 conver t 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. r1 = viout/(0.6 x 10 -6 x ev) = 2 /(0.6 x 10 -6 x 500) = 6667[ ? ] ? 6.8[k ? ] (2) l-gain mode the output voltage is calculated as follows. viout= 0.063 x 10 -6 x ev x r1 3) c1 (1) to reject the flicker light.. in case iout output is r1 only and an als receives the ar tificial lights such as fluorescent lamps and incandescent lamps synchronized with 50/60 hz of ac power supplies, the out put 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 backl ight 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-o n and recovery from shutdown mode to operation mode.
bh1600fvc technical note 5/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. terminal descriptions pin no. pin name 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 5 gc1 mode setting terminal 1 6 gc2 mode setting terminal 2 v cc v cc v cc
bh1600fvc technical note 6/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. package outlines optical design for the device a a lot no. production code wsof6 ( unit : mm ) 0.8 mm 1.3 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 min.0.4 mm min.0.4 mm
bh1600fvc technical note 7/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. notes for use 1) absolute ma ximum ratings an excess in the absolute maximum ratings, such as supply voltage ( vmax ), te mperature range of o perating conditions ( topr ), etc., can break down devices, t hus making impossible to identify breaking mode such as a short circuit or an open circuit. if any special mode exceeding the absolute maximum ra tings is assumed, consideration should be given to take physical safety measures incl uding the use of fuses, etc. 2) gnd voltage make setting of the potential of the gnd te rminal 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 th e 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 t he gnd terminal, the ics can break down. 4) operation in strong electromagnetic field be noted that using ics in the strong elec tromagnetic field can malfunction them. 5) inspection with set pcb on the inspection with the set pcb, if a capacitor is connec ted to a low-impedance ic terminal, the ic can suffer stress. therefore, be sure to discharge from the set pcb by each pr ocess. furthermore, in order to mount or dismount the set pcb to/from the jig for the inspection process, be sure to tu rn off the power supply and then mount the set pcb to the jig. after the completion of the inspection, be sure to turn off t he 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 stor age of the set pcb. 6) input terminals in terms of the construction of ic, parasitic elements are in evitably formed in relation to po tential. the op eration of the parasitic element can cause interference with circuit operation, thus resulting in a malfunct ion and then breakdown of the input terminal. therefore, pay thorough attention not to handle t he 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 t he ic. in addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than th e 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 characterist ics. please handle it with care. 9) rush current when power is first supplied to this ic, rush current may fl ow instantaneously. because it is possible that the charge current to the parasitic capacitance of internal phot o diode or the internal logic may be unstable. therefore, give special consideration to power coupling capacitance, power wiri ng, 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 m ount by footprint dimensions described in the jisso information for wsof6. this pad is gnd level, ther efore there is a possibility that lsi malfunctions and heavy-current is generated.
bh1600fvc technical note 8/8 www.rohm.com 2012.02 - rev.d ? 2012 rohm co., ltd. all rights reserved. ordering part number b h 1 6 0 0 f v c - t r part no. part no. 1600 package fvc: wsof6 packaging and forming specification tr: embossed tape and reel (wsof6) (unit : mm) wsof6 s 0.08 m 0.08 s 654 23 1 456 21 3 (max1.8 include burr) (max2.8 include burr) 2.6 0.1 0.3 1.6 0.1 3.0 0.1 0.75max 0.5 0.22 0.05 (0.45) (0.15) 0.145 0.05 (1.5) (1.2) (1.4) 1pin mark direction of feed reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper right when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs tr () 1pin
r1120a www.rohm.com ? 2012 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. 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 design ing 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 produc ts. 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, commu- nication 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.
|
