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| 1/21 www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. small-sized class-d speaker amplifiers analog input stereo class-d speaker amplifier BD5471MUV description BD5471MUV is a low voltage drive class-d stereo speaker ampl ifier that was developed for note-book pc, cellular phone, mobile audio products and the others. lc filters of speaker outputs are unnecessa ry, and only 7 external components are needed for speaker system. also, 3.3v regulator in bd5471 muv can use power supply for audio-codec. BD5471MUV, that is high-efficiency, low consumption, is suitable for applicati on by using battery. shutdown current is 0a typically. also, start-up time is fast from shutdown to active mode. bd5471 muv can use for some applications that change mode between shutdown state and active state. features 1) high power 2.3w typ. (vdd=5v, rl=4 ? , thd+n=10%, stereo input) high power 1.5w typ. (vdd=5v, rl=8 ? , thd+n=10%, stereo input) 2) gain selectable by the external control (6, 12, 18, 24db) 3) pop noise suppression circuitry 4) standby function (mute function) [i sd =0ua] 5) protection circuitry (short protection [audio, reg], thermal shutdown, under voltage lockout) 6) built-in 3.3v regulator 7) built-in beep detect circuitry 8) very small package vqfn024v4040 applications notebook computers, mobile electronic applications, mobile phones, pda etc. absolute maximum ratings (ta=+25 ) parameter symbol ratings unit power supply voltage vdd 7.0 v power dissipation pd 0.7 *1 w 2.2 *2 w storage temperature range tstg -55 ~ +150 input voltage range *3 vin -0.3 ~ vdd+0.3 v control terminal input voltage range *4 vctl -0.3 ~ vdd+0.3 v *1 74.2mm 74.2mm 1.6mm, fr4 1-layer glass epoxy board(copper on top layer 0%) derating in done at 5.6mw/ for operating above ta=25 . there are thermal via on the board *2 4.2mm 74.2mm 1.6mm, fr4 4-layer glass epoxy board (copper on bottom 2 and 3 layer 100%) *3 input terminal (inl +, inl-, inr+, inr-) *4 control terminal (mute, g0, g1, eapd, beep, reg_sd) operating conditions parameter symbol ratings unit power supply voltage vdd +4.5 ~ +5.5 v temperature range topr -40 ~ +85 * these products arent designed for protection against radioactive rays. no.13101ebt03 downloaded from: http:///
technical note 2/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. electric characteristics (unless otherwise specified, ta=+25 , vdd=+5.0v, rl=8 , ac item= lc filter(l=22h, c=1f) ) parameter symbol limits unit conditions min. typ. max. circuit current (active) i cc D 5.5 12.0 ma active mode, mute=h, eapd=h, no load circuit current (standby) i stby D 0.1 1.0 ma standby mode, mute=h,eapd=l circuit current (regulator) i ccr D 0.15 1.0 ma regulator mode, mute=eapd=l reg_sd=h circuit current (shutdown) i sd D 0.1 2.0 a shutdown mode, mute=l, reg_sd=l technical note 3/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. g0 g0 150k g1 beep de t inr 24 19 20 21 22 23 inl- inr avd d a gnd inl+ c6 7 8 9 10 11 12 reg_ou mute eap reg_s reg_vd reg _ gn c2 2 . 2 f c3 short short eapd 3.3vre pwm gain select h- bridge beep pwm gain select h- bridg stop uvlo tsd shor bias osc bee p mut e eapd uvlo t s d mut e 150k g1 g1 g0 1 2 3 4 5 6 beep det_c outl pvdd outl- pgndl c11 c1 0.01u f vdd 13 14 15 16 17 18 pvdd outr- pgnd outr g1 g0 c 8 0.1 f c7 0.1 f c9 10u f c5 0. 1 f c4 0.1 f 1 f 8 ? vdd vdd 150k 150k +b 150k short short short short uvlo t s d v v v 22 f 1 f 22 f a a v se v se v btl v be ep v mute a v eapd a v reg_ sd vin vin vin vin a v g0 a v g1 8 ? v btl v v v 1 f 1 f 22 f 22 f v se v se measurement circuit diagram package outlines vqfn024v4040 (plastic mold) (unit: mm) bottom view top view d5471 downloaded from: http:/// technical note 4/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. block diagram pin assignment technical note 5/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. application circuit example _ _ _ _ _ _ differential input _ _ _ _ _ _ single-ended input downloaded from: http:/// technical note 6/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. _ _ _ _ _ evaluation board circuit diagram please connect to input signal line. please connect to gnd line. please connect to speaker . please connect to power supply (vdd=+4.5 5.5v) line. downloaded from: http:/// technical note 7/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. evaluation board parts list qty. item description smd size manufacturer/part number 1 c1 capacitor, 0.01 f 1608 murata grm188r71c103ka01d 1 c2 capacitor, 2.2 f 1608 murata grm188r61c225ke15d 2 c3, c4,c6,c7 capacitor, 0.1 f 1608 murata grm188r71c104ka01d 1 c5, c8 capacitor, 10 f a (3216) rohm tcfga1a106m8r 1 u1 ic, BD5471MUV, stereo class-d audio amplifier 4.0mm x 4.0mm vqfn package rohm BD5471MUV 1 pcb1 printed-circuit board, BD5471MUV evm D D the relation in the gain setting and input impedance ri the gain setting terminal (g0, g1) g0 g1 gain[db] ri [ohm] l l 6 90k l h 12 60k h l 18 36k h h 24 20k description of external parts power down timing capacitor (c1) its the capacitor which adjusts time from beep signal stop to amplifier stop. turn off time toff is set the following formula. regulator output capacitor(c2) output capacitor of 3.3v regulator. use capacitance equal to or more than 1uf. input coupling capacitor ci (c3,c4, c6,c7) it makes an input coupling capacitor 0.1f. input impedance ri in each gain setting becomes the above table. in 18db gain setting, it is ri=36k (typ.). it sets cutoff frequency fc by the following formula by input coupling capacitor ci (c3,c4, c6,c7) and input impedance ri in case of ri=36k ? , ci=0.1uf, it becomes fc=about 44hz. the power decoupling capacitor (c5,c8) it makes a power decoupling capacitor 10uf. when making capacitance of the power decoupling capacitor sm all, there is an influence in the audio characteristic. when making small, careful for the audio char acteristic at the actual application. [] ? ? ? [] 8.0 ? ? downloaded from: http:/// technical note 8/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. evaluation board pcb layer top layer bottom layer downloaded from: http:/// technical note 9/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. the way of evaluating audio characteristics evaluation circuit diagram when measuring audio characteristics, inse rt lc filter during the output terminal of ic and the speaker load and measure it. it. arrange lc filter as close as po ssible to the output terminal of ic. in case of l=22 h, c=1 f, the cutoff frequency becomes the following. =33.9[khz] use a big current type - inductor l. (reference) tdk: slf12575t-220m4r0 0.1 f 0.1 f diff er ent ial input audio inputl+ audio inpult- c2 c1 g0 g1 gain control beep 2.2 f eapd mute c7 h active l shutdown reg_sd 0.01 f c8 mute inr- inr+ outl+ bias agnd av dd pvddl 150k inl- inl+ pwm h- bridge gain select reg_vdd beep eapd re g_s reg reg_out reg_gnd pgndr pvddr g0 g1 control logic 150k 150k 150k det_c 4 pgndl 3.3v short p rotection tsd uvl 24 23 10 15 21 3 6 outl- pwm h- bridge gain select 19 20 error g0 g1 g0 g1 18 g0 g1 7 8 short error osc beep detect 150k 9 1 2 17 outr outr- 11 150k short protection 12 22 5 14 error 0.1 f 0.1 f diff er ent ial input audio inputr+ audio inputr- c4 c3 c5 10 f short 1 f 1 f 22 f 22 f r l btl audio precision etc. rl=speaker load meas ur em ent i nstrument 1 f 1 f 22 f 22 f r l btl rl=speaker load meas ur em ent i nstrument 13 16 audio precision etc. [] 2 ? downloaded from: http:/// technical note 10/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. beep detection function this ic has beep detection. when inputting beep signal to 1pin beep terminal at standby mode, amplifier becomes standby to active. when beep signal stops, amplifier becomes active to standby. it is adjustable the time(toff) from beep signal stop to amp lifier standby by a capacitance connect to 2pin det_c terminal. if no need to use beep detection, make 1pin beep terminal open or connect to gnd. toff calculation fomula det_c 2v/div outl+ 5v/div beep 5v/div mute=h, beep signal input mute=h, beep signal stop to ff ton to ff = c 0.8vdd 5 c: condenser to connect to a 2pin [msec] example c=0.01, vdd=5v to ff = 8 m s e c to ff mute beep det_c amplifier state active 0.2 vdd active standby active vdd downloaded from: http:/// technical note 11/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. cntrol terminal and output input output mute eapd beep audio in amplifier state speaker output l l l no signal l(shutdown) hiz l l l signal l(shutdown) hiz l l h no signal l(shutdown) hiz l l h signal l(shutdown) hiz l h l no signal l(shutdown) hiz l h l signal l(shutdown) hiz l h h no signal l(shutdown) hiz l h h signal l(shutdown) hiz h l l no signal l(standby) hiz h l l signal l(standby) hiz h l h no signal h(active) no signal h l h signal h(active) signal h h l no signal h(active) no signal h h l signal h(active) signal h h h no signal h(active) no signal h h h signal h(active) signal audio in [ input ] eapd [ input ] beep [ input ] mute [ input ] amplifier state speaker output active active standby standby standby shutdown audio signal beep signal audio signal beep signal audio signal in case of eapd=l, it doesnt output. equal to or more than 0.125sec. beep signal f=300~1760hz 3.3msec 570usec amplifier is a standby. the current consumption reduces. the current consumption in the audio part is zero. it detects that beep was inputted. it makes an amplifier state to standby mode if beep isnt inputted equal to or more than 3.3msec. downloaded from: http:/// technical note 12/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. about output starting and stop this ic has the cuircuit of pop noi se reduction at starting and stop. pop noise reduction is realized in controlling to adjust the timing of output at starting and stop. turn on time is 1msec. about the short protection output starting (mute=h, eapd=l h) ton=1msec output stop (mute=h, eapd=h l) eapd 5v/div outl+ 5v/div outl- 5v/div h bridge short protection short protection outl+ h bridge outl outr+ outr when detecting a short of lch output, lch output stops, and rch output stops. also when detecting a short of rch output, rch output stops, and lch output stops. downloaded from: http:/// technical note 13/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. about the thermal design by the ic characteristics of an ic have a great deal to do with the temperature at which it is used, and exceeding absolute maximum ratings may degrade and destroy elements. careful consider ation must be given to the heat of the ic from the two standpoints of immediate damage and long-term reliability of oper ation. pay attention to points such as the following. since an maximum junction temperature (tj max .)or operating temperature range (topr) is shown in the absolute maximum ratings of the ic, to reference the va lue, find it using the pd-ta charac teristic (temperature derating curve). if an input signal is too great when there is insufficient radiation, tsd (thermal shutdo wn) may operate. tsd, which operates at a chip temperature of approximately +180 , is canceled when this goes below approximately +100 . since tsd operates persistently with th e purpose of preventing chip damage, be aw are that long-term use in the vicinity that tsd affects decrease ic reliability. temperature derating curve power dissipation values vary according to the board on which the ic is mounted. the power dissipation of this ic when mounted on a multilayer board designed to radiate is greater than the val ues in the graph above. note) values are actual measurements and are not guaranteed. reference data vqfn024v4040 2.5 2.0 1.0 0.5 0.0 0 25 50 75 100 125 150 ambient temperature ta( power dissipation pd(w 0.7w measurement conditions : ic unit rohm standard board mounted board size : 74.2mm 74.2mm 1.6mmt board fr4 1-layer glass epoxy board(copper on top layer 0%) board fr4 4-layer glass epoxy board(copper on 2,3 layer 100%) board size : 35mm 25mm 1.6mmt board fr4 4-layer glass epoxy board(copper on 2,3 layer 100%) connecting with thermal via 85 1.5 0.7 2.2 2.2w 3.5 3.1 3.1w downloaded from: http:/// technical note 14/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. typical characteristics table of graphs parameter parameter figure efficiency vs output power 1, 2 power dissipation vs output power 3, 4 supply current (iccact) vs supply voltage 5 supply current (istby) vs supply voltage 6 supply current (ireg) vs supply voltage 7 shutdown current (isd) vs supply voltage 8 output power (po) vs load resistance 9, 10 vs supply voltage 11, 12 total harmonic distortion plus noise (thd+n) vs output power 13, 14 vs frequency 15, 16, 17, 18, 19, 20, 21,22 vs common-mode input voltage 23, 24 supply voltage rejection ratio (psrr) vs frequency 25, 26, 27, 28 common-mode rejection ratio (cmrr) vs frequency 29, 30 gain vs frequency 31, 32, 33, 34, 35, 36, 37, 38 downloaded from: http:/// technical note 15/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. [] [] [] [] = = [] [%] = = = = = [] [] = = = = = [] [%] = = = = = [] [] = = = [] [] [] [] fig.1 fig.2 fig.3 fig.4 fig.5 fig.6 fig.7 fig.8 downloaded from: http:/// technical note 16/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. = [] [] =?=% =?=% =% = [] [] = = = =% = [] [] = = = = = [] [%] = = = = = [] [%] = = = = = [] [%] = = = 4 = = [] [%] = = = = [] [] =?=% =?=% fig.9 fig.10 fig.11 fig.12 fig.13 fig.14 fig.15 fig.16 downloaded from: http:/// technical note 17/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. = = [] [%] = = = = = [] [%] = = = __ = = = [] [%] = = = = = [] [%] = = = = = [] [%] = = = = = [] [%] = = = = = [] [%] = = = __ = = = [] [%] = = = fig.17 fig.18 fig.19 fig.20 fig.21 fig.22 fig.23 fig.24 downloaded from: http:/// technical note 18/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. = = = [] [] = = = = = = [] [] = = = = = [] [] = = = = = = [] [] = = = = = [] [] = = = __ = = [] [] = = = = = [] [] = = = = = = [] [] = = = fig.25 fig.26 fig.27 fig.28 fig.29 fig.30 fig.31 fig.32 downloaded from: http:/// technical note 19/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. __ = = [] [] = = = __ = = [] [] = = = __ = = [] [] = = = __ = = [] [] = = = __ = = [] [] = = = __ = = [] [] = = = fig.33 fig.34 fig.35 fig.36 fig.37 fig.38 downloaded from: http:/// technical note 20/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. notes for use (1) absolute maximum ratings this ic may be damaged if the absolute maximum ratings fo r the applied voltage, tem perature range, or other parameters are exceeded. therefore, av oid using a voltage or temperature that exceeds the absolute maximum ratings. if it is possible that absolute maximum ratings will be exce eded, use fuses or other physical safety measures and determine ways to avoid exceeding the ic's absolute maximum ratings. (2) gnd terminals potential try to set the minimum voltage for gnd terminals potential, regardless of the operation mode. (3) shorting between pins and mounting errors when mounting the ic chip on a board, be very careful to set the chip's orientation and position precisely. when the power is turned on, the ic may be damaged if it is not mo unted correctly. the ic may also be damaged if a short occurs (due to a foreign object, etc.) between two pins, between a pin and the power supply, or between a pin and the gnd. (4) operation in strong magnetic fields note with caution that operation faults may occur when this ic operates in a strong magnetic field. (5) thermal design ensure sufficient margins to the thermal design by taking in to account the allowable power dissipation during actual use modes, because this ic is power amp. when excessive signal in puts which the heat dissipation is insufficient condition, it is possible that thermal shutdown circuit is active. (6) thermal shutdown circuit this product is provided with a built-in thermal shutdown circuit. when the the rmal shutdown circuit operates, the output transistors are placed under open status. the thermal shutdown circuit is primarily intended to shut down the ic avoiding thermal runaway under abnormal conditions wi th a chip temperature exceeding tjmax = +150 , and is not intended to protect and secure an electrical appliance. (7) load of the output terminal this ic corresponds to dynamic speaker load, and doesn't correspond to the load except for dynamic speakers. (8) the short protection of the output terminal this ic is built in the short protection for a protection of output transistors. when the short protecti on is operated, output terminal become hi-z condition and is stopped with latch. once output is stopped with la tch, output does not recover automatically by canceling the short-circ uiting condition. the condition of stoppi ng with latch is cancelled, when power supply or mute signal is turned off and turned on again. (9) operating ranges the rated operating power supply voltage range (vdd=+4.5 v ~ +5.5v) and the rated operating temperature range (ta=-40 ~ +85 ) are the range by which basic circuit functions is operated. characteristics and rated output power are not guaranteed in all power supply voltage ranges or temperature ranges. (10) electrical characteristics electrical characteristics show the typical performance of device and depend on board layout, parts, power supply. the standard value is in mounting device and parts on surface of rohms board directly. (11) maximum output power when stereo inputs at rl=4 , maximum output power may not achieve up to typical value because the device heats. ensure sufficient margins to the thermal design to get larger output power. (12) power decoupling capacitor because the big peak current flows through the power line, the class-d amplifier has an influence on the audio characteristic by the capacitance value or the arrangement part of the power decoupling capacitor. (13) power supply use single power supply, because power supplies (4,10,15,21p in) of audio amplifier and regulator are shorted inside. audio downloaded from: http:/// technical note 21/21 BD5471MUV www.rohm.com 2013.11 - rev.b ? 2013 rohm co., ltd. all rights reserved. ordering part number b d 5 4 7 1 m u v - e 2 part no. part no. 5471 package muv:vqfn024v4040 packaging and forming specification e2: embossed tape and reel (unit : mm) vqfn024v4040 0.08 s s 16 7 12 19 24 13 18 0.4 0.1 0.02 +0.03 - 0.02 1pin mark 2.4 0.1 c0.2 0.5 4.0 0.1 0.75 2.4 0.1 4.0 0.1 1.0max (0.22) 0.25 +0.05 - 0.04 ? order quantity needs to be multiple of the minimum quantity. datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:/// datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:/// datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:/// |
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