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1/22 www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. system power supply for tv series fet controller type 3ch system power supply ics bd8606fv description bd8606fv has realized the high performance and reliability required as a power supply for thin-screen tv. due to the high-speed load response, it is most suitable fo r tv-purpose processors with increasingly high performance, and due to the wide phase margin it leaves a good margin for board pattern & constant setting and so facilitates its application design. as a high-reliability design, it has various built-in protecti on circuits (overcurrent protection, output voltage abnormal protection, thermal protection, and off-latc h function at the time of abnormality etc. ), therefore as an advantage it does not easily damage in every possible abnormal condition such as all-pin short circuit test etc. and hence most suitable for thin-screen tv which requires the high reliability. features 1) 3ch synchronous rectif ication step-down system dc/dc converter controller 2) 3ch independent on/off. controllable 3) soft start, soft off function 4) concentrated protection c ontrol with built-in sequencer 5) built-in low voltage protection function 6) built-in overvoltage protection function 7) built-in overcurrent protection function 8) built-in rt terminal open/short protection function 9) frequency setting by external resistance is available. 10) protection condition is output from pdet terminal. 11) built-in external reset output function no.09034eat02
technical note 2/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. electric characteristic (ta=25 ` , vin1, vin2, vin3=5.0v, vcc=5.0v, and gnd=0v unless otherwise specified.) parameter symbol specification value unit condition min typ max circuit current 1 i q1 - 2.5 5 ma ctl1,2,3=0v circuit current 2 i q2 - 5.0 10 ma ctl1,2,3=vcc < error amplifier part ch1,ch2,ch3 > standard voltage (vref) v ref 0.792 0.8 0.808 v terminal fb and fc terminal short terminal fb input bias current i fbb -1 0 1 ?
technical note 3/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. block diagram 12345678910 121314151617181920 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 11 ovp1.5 lvp0.4 pdet monvcc rstdly reset vcc ctl3 ctl2 ctl1 test2 test1 gnd ss3 fc3 fb3 vin3 drv3a drv3b lx3 pgnd3 pgnd1 drv1b lx1 drv1a vin1 fb1 fc1 ss1 gnd rt fc2 fb2 vin2 drv2a lx2 drv2b pgnd2 driver control ovp1.5 lvp0.4 driver control ovp1.5 lvp0.4 driver control ss2 delay system control sequencer vrsto vref vref vref osc ss1 ss2 ss3 ocp3 ocp2 ocp1 figure 1 block char terminal explanation table 1 terminal explanation no. symbol description no. symbol description 1 pgnd1 ch1 power gnd (same potential as gnd terminal) 21 pgnd3 ch3 power gnd (same potential as terminal gnd) 2 drv1b ch1 nch drive output terminal 22 drv3b ch3 nch drive output terminal 3 lx1 ch1 overcurrent detection terminal 23 lx3 ch3 overcurrent detection terminal 4 drv1a ch1 pch drive output terminal 24 drv3a ch3 pch drive output terminal 5 vin1 ch1 power supply input terminal 25 vin3 ch3 power supply input terminal 6 ocp1 ch1 overcurrent detection level resistance connection terminal 26 ocp3 ch3 overcurrent detection level resistance 7 fb1 ch1 voltage detection terminal 27 fb3 ch3 voltage detection terminal 8 fc1 ch1 phase compensation terminal 28 fc3 ch3 phase compensation terminal 9 ss1 ch1 soft start adjustment capacity connection terminal 29 ss3 ch3 soft start adjustment capacity connection terminal 10 gnd gnd (0v connection) 30 gnd gnd (0v connection) 11 rt frequency adjustment resistance connection terminal 31 test1 test terminal (connect to gnd) 12 ss2 ch2 soft start adjustment capacity connection terminal 32 test2 test terminal (connect to gnd) 13 fc2 ch2 phase compensation terminal 33 ctl1 ch1 control terminal 14 fb2 ch2 voltage detection terminal 34 ctl2 ch2 control terminal 15 ocp2 ch2 overcurrent detection level resistance connection terminal 35 ctl3 ch3 control terminal 16 vin2 ch2 power supply input terminal 36 vcc power supply input terminal 17 drv2a ch2 pch drive output te rminal 37 reset reset output terminal 18 lx2 ch2 overcurrent detection terminal 38 rstdly reset delay adjustment capacity connection terminal 19 drv2b ch2 nch drive output terminal 39 monvcc vcc monitor terminal 20 pgnd2 ch2 power gnd (same potential as terminal gnd) 40 pdet off latch signal output * please give to vcc+0.3v as an operation condition in all input terminals. however, please do not exceed the absolute maximum rating as vcc=vin1=vin2=vin3.
technical note 4/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. terminal equivalent circuit chart terminal no. terminal name explanation terminal equivalent circuit chart 1 pgnd1 ch1 power gnd (gnd terminal and this potential) 20 pgnd2 ch2 power gnd (gnd terminal and this potential) 21 pgnd3 ch3 power gnd (gnd terminal and this potential) 2 drv1b ch1 nch driving output terminal 19 drv2b ch2 nch driving output terminal 22 drv3b ch3 nch driving output terminal 3 lx1 ch1 over current detection terminal 18 lx2 ch2 over current detection terminal 23 lx3 ch3 over current detection terminal 4 drv1a ch1 pch driving output terminal 17 drv2a ch2 pch driving output terminal 24 drv3a ch3 pch driving output terminal 5 vin1 ch1 power supply input terminal 16 vin2 ch2 power supply input terminal 25 vin3 ch3 power supply input terminal vin vin pgnd pgnd ? 22 vin pgnd ? 23 vin vin vin1 vin1 pgnd pgnd ? 24
technical note 5/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. terminal no. terminal name explanation terminal equivalent circuit chart 6 ocp1 ch1 over current detection level set resistance connection terminal 15 ocp2 ch2 over current detection level set resistance connection terminal 26 ocp3 ch3 over current detection level set resistance connection terminal 7 fb1 ch1 voltage detection terminal 14 fb2 ch2 voltage detection terminal 27 fb3 ch3 voltage detection terminal 8 fc1 ch1 phase amends terminal 13 fc2 ch2 phase amends terminal 28 fc3 ch3 phase amends terminal vcc gnd ? 26 vin1 vcc gnd ? 27 vcc gnd ? 28
technical note 6/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. terminal no.. terminal name explanation terminal equivalent circuit chart 9 ss1 ch1 soft start adjustment capacity connection terminal 12 ss2 ch2 soft start adjustment capacity connection terminal 29 ss3 ch3 soft start adjustment capacity connection terminal 10 gnd gnd (0v connection) 30 gnd gnd (0v connection) 11 rt frequency adjustment resistance connection terminal 31 test1 test terminal 32 test2 test terminal 33 ctl1 ch1 control terminal 34 ctl2 ch2 control terminal 35 ctl3 ch3 control terminal ? vcc gnd ? 29 vcc gnd vcc gnd 31 32 33 34 35
technical note 7/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. terminal no. terminal name explanation terminal equivalent circuit chart 36 vcc power supply input terminal 37 reset reset output terminal 38 rstdly reset delay adjustment capacity connection terminal 39 monvcc vcc monitor terminal 40 pdet off latch output terminal vcc gnd 38 vcc gnd 39 vcc gnd 40 vcc gnd 37
technical note 8/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. circuit chart 1 2 3 4 5 6 7 8 9 10 121314151617181920 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 11 ovp1.5 lvp0.4 pdet monvcc rstdly reset vcc ctl3 ctl2 ctl1 test2 test1 gnd ss3 fc3 fb3 vin3 drv3a drv3b lx3 pgnd3 pgnd1 drv1b lx1 drv1a vin1 fb1 fc1 ss1 gnd rt fc2 fb2 vin2 drv2a lx2 drv2b pgnd2 driver control ovp1.5 lvp0.4 driver control ovp1.5 lvp0.4 driver control ss2 delay system control sequencer vrsto vref vref vref osc ss1 ss2 ss3 ocp3 ocp2 ocp1 pwm counter pwm counter it measures it by the static test mode. the circuit chart of ch2 and ch3 is omitted. figure 2 circuit chart
technical note 9/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. application circuit chart v o 3 : 3.3v 123456789 10 1213 14151617 1819 20 40393837 3635 3433323130 2928 27262524 2322 21 11 test3 monvcc rstdly reset vcc ctl3 ctl2 ctl1 test2 test1 gnd ss3 fc3 fb3 vin3 drv3a drv3b lx3 pgnd3 ocp3 pgnd1 drv1b lx1 drv1a vin1 fb1 fc1 ss1 gnd rt fc2 fb2 vin2 drv2a lx2 drv2b pgnd2 ss2 ocp2 ocp1 4.7 h 4.7 k 175k 56 k 1000p f 180 k 6800p f 0 0.1 f 33 k 100 k 4.7 h 4.7 k 153 k 72 k 110 k 1000p f 6800p f 27 k 6800p f 5600p f 66 k 24 k 33 k 4.7 k 4.7 h 22 f 2 vcc 0 39 pf 0 47 pf 0 180 pf vin vin 40uf external pullup vin 22 f 2 22 f 2 10 f 10 f 10 f v o 2 : 2.5v v o 1 : 1.2v ovp1.5 lvp0.4 driver cont rol ovp1.5 lvp0.4 driver cont rol ovp1.5 lvp0.4 driver cont rol delay system control sequencer vrsto vref vref vref osc ss1 ss2 ss3 0 0 100 k 100 k figure 3 application circuit chart
technical note 10/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. each characteristic reference data 0.700 0.725 0.750 0.775 0.800 0.825 0.850 0.875 0.900 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] error amp reference voltage : vref[v] figure 4 standard voltage-temperature characteristic 100 150 200 250 300 350 400 450 500 550 600 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] switching frequency : fosc[khz] figure 5 switching frequency- temperature characteristic -100 -80 -60 -40 -20 0 20 40 60 80 100 1000 10000 100000 1000000 10000000 f[hz] gain[db] -180 -135 -90 -45 0 45 90 135 180 phase[deg] phase gain figure 6 open loop characteristic 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] ss charge current : iss[a] figure 7 terminal ss charge current-temperature characteristic 20 30 40 50 60 70 80 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] ocp input current : iocp[a] figure 8 terminal ocp inflow current-temperature characteristic 5 6 7 8 9 10 11 12 13 14 15 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] rstdly charge current : irstdly[a] figure 9 terminal rstdly charge current-temperature characteristic 0.90 0.95 1.00 1.05 1.10 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ambient temperature : ta[] vrsto[v] figure 10 monvcc reset detection voltage-temperature characteristic 10 100 1000 10 100 1000 rt resistance [k] pwm frequency [khz] figure 11 switching frequency-terminal rt resistance characteristic ctl ss vo 5v 3.3v 1.72v figure 12 soft start crimp 0 10 20 30 40 50 60 70 80 90 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 load current[a] power efficiency[%] figure 13 efficiency rt=27k css=6800pf 3.4ms v in =5.0v vo=3.3v external fet 9? sp8m4 drive
technical note 11/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. reference data of dead time t fdeat t rdeat 10% 90% 10% 90% drva (pch gate) drvb (nch gate) figure 14 dead time (vcc=5.0v,vin=5.0v,ta=25 ) parameter symbol min typ max unit pchmos off nchmos on dead time trdeat 90 120 160 ns nchmos off pchmos on dead time tfdeat 100 140 190 ns 50 100 150 200 -40-200 20406080 ambient temperature : ta[] trdeat [nsec] vcc=4.0v vcc=5.0v vcc=7.0v figure 15 dead time trdeat - temperature characteristic 50 100 150 200 -40-200 20406080 ambient temperature : ta[] tfdeat [nsec] vcc=4.0v vcc=5.0v vcc=7.0v figure 16 dead time tfdeat - temperature characteristic 2 4 6 0 1 2 3 4 5 6 7 90 93 95 98 100 103 105 108 110 113 115 118 120 123 125 128 130 133 135 138 140 143 145 148 150 153 155 158 160 trdeat[ns] (pcs) vcc=vin=5.0v ta=25 n=12(2lot) figure 17 dead time trdeat - difference 1 6 5 0 1 2 3 4 5 6 7 100 103 105 108 110 113 115 118 120 123 125 128 130 133 135 138 140 143 145 148 150 153 155 158 160 163 165 168 170 173 175 178 180 183 185 188 190 tfdeat[ns] (pcs) vcc=vin=5.0v ta=25 n=12(2lot) figure 18 dead time tfdeat - difference
technical note 12/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. reset detection data vcc reset 100k 1.235v (typ) rstdly 1.0v (typ) monvcc figure 19 circuit chart v rst_hys v rsto reset[v] monvcc[v] v ol_rst figure 20 reset detection (vcc=5v,ta=25 ) parameter symbol min typ max unit terminal monvcc reset detection voltage v rsto 0.98 1.0 1.02 v terminal monvcc reset detection voltage maximum hysteresis error v rst_hys 20 72 180 mv
technical note 13/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. permissible loss 0 25 50 75 100 125 150 0.2 0.4 0.6 0.8 0 ambient temperature ta [ ] permissible loss pd [w] 1 1.2 rohm standard substrate mounting ja=111.1 /w rohm standard substrate specification material the glass epoxy size 70mm 70mm 1.6mmt figure 21heat decrease curve these values are the example values, and no guarantee values. j c [ /w] j a [ /w] t stgmin [ ] t stgmax [ ] t a min [ ] t a max [ ] t cmax [ ] t j max [ ] 28.0 111.1 -50.0 150.0 - 45.0 85.0 150.0 150.0 destruction temperature destruction temperature
technical note 14/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. operation description on/off control dc/dc converter controller on/off function dc/dc converter controller of each ch can be independ ently controlled on/off by ctl1, ctl2, and ctl3 terminal. analog circuit of ch interlocked to each ctl terminal starts operation at on control (on mode), and goes down to setting output voltage. analog circuit of ch interlocked to each ctl terminal shoul d be standby at off control (off mode), and output voltage becomes 0v. table 2 dc/dc converter controller on/off function ctl1 terminal voltage ch1 ctl2 terminal voltage ch2 ctl3 terminal v oltage ch3 >vihctl1 on control >vihctl2 on control >vihctl3 on control technical note 15/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. osc oscillation frequency setting function drva and drvb output oscillation frequenc y of dc/dc converter controller of each ch can be set by installing resistance between rt terminal and gnd externally. figure 23 terminal rt resistance-oscillation frequency off latch signal output function pdet terminal outputs condition of off latch when protection operation of dc/dc converter cont roller of each ch operates. table 3 pdet terminal off latch signal output function protection operation terminal pdet on low off hi-z 10 100 1000 10000 1 10 100 1000 rt terminal resistance[k ? ] *reference data switching frequency[khz]
technical note 16/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. reset output function reset output function observes voltage value from monvcc terminal and does reset operation compared to internal reference level. set monvcc terminal external resistance to make vcc voltage more than 5.0v at reset release. table 4 dc/dc converter controller on/off function monvcc terminal voltage reset terminal 1.0v(typ) low 1.072v(typ) hi-z delay time until detecting reset release is settable by capacitor connected to rstdly terminal. rstdly rstdly rstdly i c1.235v t ? ? 0 hi z low reset t rstdly ?v rsto ( = ) r 1 +r 2 r 2 (v rsto +v rsto_hys ) vcc vcc monvcc r 1 r 2 v rsto (1.0v) reset c rstdly power supply in reset input side 1.235v i rstdly figure 24 reset operation ( trstdly delay time until detecting reset release )
technical note 17/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. output duty output duty of drva of the dc/dc conv erter controller of each ch is decided depending on the voltage of the terminal fc of each ch. 92% duty output setting 9% [%]100 voltage vin voltage setting output duty output setting ? ? ? ? 0.5 2.0 0.0 50 100 duty [%] fc terminal voltage [v] 1.2 1.5 0.9 about 9% about 92% quality item characteristic typ) output duty setting range when fc=1.2v output duty=50%15% figure 25 fc voltage-output duty linearity
technical note 18/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. protection function protection circuit is effective for destruction prevention due to accident so that avoid us ing by continuous protection operation. low voltage protection function(lvp) low voltage protection function detects output voltage vo set in each ch from fb terminal of each ch and off-latched all dc/dc converter controller compared to internal reference level. low voltage protection function operates when fb terminal voltage falls below vlvp (=1.5 vref) and continues about more than 400 sec (typ). table 5 low voltage protection function ctl terminal ss terminal fb terminal low voltage protection function low voltage protection operation >vihctl >1.1v(typ) vlvp+vlvp_hys off <1.0v(typ) - disable off vihctl >1.1v(typ) >vovp effective on technical note 19/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. overcurrent protection function(ocp) overcurrent protection function compared drain voltage (lx terminal voltage) with ocp terminal voltage when external pch power mos is on. when lx terminal voltage becomes lower th an ocp terminal voltage, external mos would be off. up to 50ua (typ) of constant current from ocp terminal is synchr onized. overcurrent detection level (ocp terminal voltage) can be set arbitrarily by external resistance value. off latch by overcurrent protection function operates when lx terminal voltage falls below ocp terminal voltage and continues about more than 400 sec (typ). table 7 overcurrent protection function ctl terminal ss terminal lx terminal voltage overcurrent protection function overcurrent protection operation >vihctl >1.1v(typ) vocp off <1.0v(typ) - disable off technical note 20/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. terminal fc abnormality protection function d r v ss fb fc drva drvb fcp erramp pwmcomp to seq internal triangular wave about 400usec(typ) continuance and an off latch. off latch fclp=0.62v(typ) 1.5v(typ) fc internal triangular wave 0.9v(typ) fchp=1.95v(typ) about 400usec(typ) the terminal fc abnormality protection function ofrattis it a ll dc/dc converter controller detecting the continuance of the state that fc which is the differenc e input of pwmcomp does not intersect with an internal triangular wave. the terminal fc abnormality protection function is exceeded 1.95v (typ) by the voltage of the terminal fc or operates when it falls below 0.62v(typ), and about 400usec(typ) or more continues. ctl terminal ss terminal protection operation fc terminal terminal fc abnormality protection operation > vihctl > 1.1v(typ) enable > 1.95v(typ) on 0.62v(typ) < , < 1.95v(typ) off < 1.0v(typ) disable < 0.62v(typ) on < vihctl - off terminal fc abnormality protection function is enabled when ss terminal voltage of each ch becomes more than 1.1v (typ) in the transition to on control (during soft start). rt terminal open/short protection function rt terminal open/shot protection function off-latches all dc/dc converter controller by detecting open/short condition internally from rt terminal to prevent from output voltage error caused by abnormal oscillation of internal triangular wave at rt terminal open/short. rt terminal open/short protection function is regularly enabled after boot-up. rt terminal open/short protection functi on operates when error detection c ondition continues about more than 400 sec (typ).
technical note 21/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. soft start time-out function each ch dc/dc converter controller off-latch-controls when v ss does not exceed v sspon from v ss > v ssstb +v ssstb_hys after 50msec (typ) passed from soft start. v sspon v ssclm 0v ss terminal v ssstb +v ssstb_hys about 50msec( typ) figure 28 at soft start time-out error detection (off latch) release method each ch dc/dc converter controller comes into off latch condition when protection function operates. off latch can be released by the following method. each ch dc/dc converter controller becomes able to do on control transition by releasing off latch. 1. set all ch ctl terminal voltage as < v ilctl and continue that condition about more than 200usec (typ). 2. drop down power supply vcc to below 3.7v.
technical note 22/22 bd8606fv www.rohm.com 2009.05 - rev.a ? 2009 rohm co., ltd. all rights reserved. ordering part number b d 8 6 0 6 f v - e 2 part no. part no. package fv: ssop-b40 packaging and forming specification e2: embossed tape and reel when you order , please order in times the amount of package quantity. reel 1pin 1234 1234 1234 direction of feed 1234 1234 1234 1234 1234 ( unit:mm ) ssop-b40 0.22 0.1 0.65 0.15 0.1 0.3min. 7.8 0.3 5.4 0.2 1.8 0.1 0.1 1 40 20 21 13.6 0.2 0.1 0.08 m ta p e quantit y direction of feed embossed carrier ta p e 2000 p cs e2 (the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand)
r0039 a www.rohm.com ? 2009 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 specied herein is subject to change for improvement without notice. the content specied 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 specications, 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 specied 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 specied 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 specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied 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, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re 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 specied 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.

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