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product structure silicon monolithic integrated circuit this product is not designed protection against radioactive rays . 1/16 tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 tsz22111 ? 14 ? 001 www.rohm.com datashee t dc brushless fan motor driver 5v single-phase full-wave fan motor driver BU6906GF general description the BU6906GF is a 5v single-phase full-wave fan motor driver with built in hall element. this is a dc brushless fan motor driver series. that has compact package, auto gain control function (henceforth, abbreviated to agc), silent drive by soft switching, and low battery consumption by standby function. this is the best lineup for note pc cooling fans. features ? built in hall element. ? agc function (agc). ? soft switching drive (pwm type) ? low pwm duty start up. ? quick start function. ? stand-by mode. ? incorporating lock protection and automatic restart circuit. ? compact package (gf:ssof6 flat lead package) when ssof6 is drop mounting, pkg thickness is 0.3mm. ? rotating speed pulse signal (fg) output ? pwm speed control package w(typ.) x d(typ.) x h(max.) ssof6 2.90mm x 3.80mm x 1.15mm ssof6 applications ? for compact 5v fan such as notebook pc cooling fan absolute maximum ratings parameter symbol limit unit supply voltage vcc 7 v power dissipation pd 540* mw operating temperature topr -40 to +85 storage temperature tstg -55 to +125 output voltage vomax 7 v output current iomax 800** ma fg signal output voltage vfg 7 v fg signal output current ifg 10 ma junction temperature tjmax 125 * reduce by 5.4mw/ over 25 . (70.0mm70.0mm1.6mm glass epoxy board) ** this value is not to exceed pd. operating rating parameter symbol limit unit operating supply voltage range vcc 1.8 to 5.5 v
2/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 block diagram this is an open drain output. connect a pull-up resistor. conventional fan motor driver ic with hall ic needs adjusting hall bias resistor due to vary factor about hall amplitude. this ic automatically controls hall amplitude. the result doesn?t need adjusting hall amplitude by built in hall element and unique agc function. take a measure against voltage rise due to reverse connection of power supply and back electromotive force. speed control by pwm input is enabled. input frequency must be 50khz at the maximum. 1 fg oscillator circuit uvlo tsd lock protection pre driver h-bridge signal out offset cancel control logic a/d conversion pwm duty hall element 3 2 gnd out1 6 vcc 4 5 pwm out2 m tsd : thermal shut down(heat rejection circuit) uvlo :under voltage lock outputs (low voltage protection circuit) page 14. page 13. page 8. page 9. figure 1. block diagram and application circuit pin descriptions p/no. t/name function 1 fg fg signal output terminal 2 gnd gnd terminal 3 out1 motor output terminal1 4 out2 motor output terminal2 5 pwm pwm signal input terminal 6 vcc power supply terminal i/o truth table ? supply magnetic direction (positive) ? output operation figure 2. output operation supply magnetic direction pwm* out1 out2 fg s h(open) h l l (output tr on) n h(open) l h h (output tr off) s l l l h (output tr off) n l l l h (output tr off) *when pwm terminal is input l, ic state changes stand-by mode. fg terminal is h constant in stand-by mode brev bfwd bhys vout1 magnetic flux density: b brev bfwd bhys vout2 magnetic flux density: b s n marking
3/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 electrical characteristic(s) (unless otherwise specified ta=25 ,vcc=5v) parameter symbol limit unit conditions characteristics min typ max circuit current 1 icc1 - 2 4 ma pwm=open figure 3. circuit current 2 (stand-by mode) icc2 - 50 - ua pwm=gnd figure 4. magnetic switch-point for forward rotation bfwd - 1.5 - mt figure 5. magnetic switch-point for reverse rotation brev - -1.5 - mt figure 6. magnetic hysteresis bhys - 3.0 5.0 mt figure 7. pwm input h level vpwmh 2.5 - vcc v - pwm input l level vpwml 0 - 0.7 v - pwm input frequency fpwm 5 - 50 khz - output voltage vo - 0.16 0.24 v io=200ma upper and lower total figure 8 to 13. fg low voltage vfgl - - 0.4 v ifg=5ma figure 14,15. fg leak current ifgl - - 5 a vfg=7v figure 16. lock detection on time ton 0.35 0.50 0.65 s figure 17. lock detection off time toff 3.5 5.0 6.5 s figure 18.
4/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves 1 0 20 40 60 80 100 123456 supply voltage : vcc [v] circuit corrent : icc2 [ua] 0.0 1.0 2.0 3.0 4.0 12345 6 supply voltage : vcc [v] circuit current : icc1 [ma] figure 3. circuit current 1 figure 4. circuit current 2 (stand-by mode) figure 5. magnetic switch-point for forward rotation figure 6. magnetic switch-point for reverse rotation operating voltage range 85 25 -40 85 25 -40 operating voltage range operating voltage range -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 123456 supply voltage : vcc [v] 85 25 -40 operating voltage range operating voltage range -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 123456 supply voltage : vcc [v] 85 25 -40 operating voltage range magnetic switch-point for forward rotation : bfwd [mt] magnetic switch-point for reverse rotation : brev [mt]
5/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves 2 figure 8. output h voltage (temperature characteristics) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 123456 supply voltage : vcc [v] magnetic hysteresis : bhys [mt] 85 25 -40 operating voltage range 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 output current : io [a] output h voltage : voh [v] figure 7. magnetic hysteresis figure 9. output h voltage (voltage characteristics) figure 10. output l voltage (temperature characteristics) 85 25 -40 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 output current : io [a] output h voltage : voh [v] 1.8v 5.0v 5.5v 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 output current : io [a] output l voltage : vol [v] 85 25 -40
6/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves 3 0.0 0.1 0.2 0.3 0.4 0.5 0246810 fg current : ifg [ma] fg output l voltage : vfgl [v] figure 12. output voltage (upper and lower total) (temperature characteristics) figure 11. output l voltage (voltage characteristics) figure 13. output voltage (upper and lower total) (voltage characteristics) figure 14. fg output l voltage (temperature characteristics) 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 output current : io [a] output l voltage : vol [v] 1.8v 5.0v 5.5v 0.0 0.2 0.4 0.6 0.8 1.0 0.00.20.40.6 0.8 out put current : io [a] output voltage : vo [v] 85 25 -40 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 0.6 0.8 output current : io [a] output voltage : vo [v] 1.8v 5.0v 5.5v 85 25 -40
7/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 typical performance curves 4 figure 16. fg output leak current figure 15. fg output l voltage (voltage characteristics) figure 17. lock detection on time 0.0 0.5 1.0 1.5 2.0 12345 6 supply voltage : vcc [v] fg leak current : ifgl [ua] 85 25 -40 0.0 0.2 0.4 0.6 0.8 1.0 123456 supply voltage : vcc[ v] lock detection on time : ton [s] 0 2 4 6 8 10 123456 supply voltage : vcc [v] lock detection off time : toff [s] figure 18. lock detection off time 85 25 -40 85 25 -40 0.0 0.1 0.2 0.3 0.4 0.5 0246 810 fg current : ifg [ma] fg output l voltage : vfgl [v] 1.8v 5.0v 5.5v
8/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 auto gain control conventional fan motor driver ic with hall ic needs adjusting hall bias resistor due to vary factor about hall amplitude. this ic automatically controls hall amplitude generated by built in hall element and motor magnet. the result doesn?t need adjusting hall amplitude by built in hall element and unique ag c function. agc function needs selecting 30ms time for hall amp gain when turning on the power, recovering from stand-by mode and lock protection.(refer to figure 22 and 23.) soft switching (pwm type) soft switching is operated using output pwm switching. the output pwm signal is generated by the slope of agc hall signal. the first, the agc hall signal is converted to absolute waveform. next, synthesize the absolute waveform and the triangular waveform by inside ic generated. the synthesized waveform has determined pwm soft switching duty and the ratio of time. pwm soft switching time depends on motor speed. in case of hall signal a slower, pwm soft switching time is long due to the obtuse angle of the agc hall signal. (pwm soft switching time is about 2ms to 4ms.) the other, in case of hall signal a faster, pwm soft switching time is short due to the sharp slope of the agc hall signal. (pwm soft switching time is about 200s to 1ms.) and, pwm soft switching frequency is 50 khz (typical) for making triangle oscillator ic inside. hence, input pwm frequency is not equal to pwm soft switching frequency. (a) convert to absolute waveform from the agc hall signal (b) motor speed is slow (c) motor speed is fast figure 19. pwm soft switching signal synthesis
9/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 pwm control rotation speed of motor can be changed by controlling on/off of the upper output depending on duty of the signal input to pwm terminal. when pwm terminal is open, h logic is applied. output pwm frequency is 50 khz (typical). this ic is not direct pwm. hence, input pwm frequency is not equal to output pwm frequency. figure 20. shows characteristic input pwm duty and output pwm duty. pwm terminal build in digital low pass filter (henceforth abbreviated to lpf). output pwm duty transitional time is max 3.5 ms from changing input pwm duty by lpf characteristic (reference is shown in figure 21. . additionally, input pwm frequency uses more than 5 khz. 0 20 40 60 80 100 020406080100 input pwm duty [%] output pwm duty [%] figure 20. characteristic input pwm duty and output pwm duty figure 21. timing chart in pwm control
10/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 low duty start up function when motor starts up from stop condition, outputs are driven in about pwm 50% duty until 3 times changing magnetic direction. the output duty depends on the input pwm duty (except 0%). even if input duty of pwm signal is low, the motor can be started. in case of input pwm duty area 2.5% to 50%, output pwm duty starts all 50% until 3 times changing magnetic direction. after the low pwm duty start up function, output pwm duty changes corresponding to input pwm duty. the other, in case of input pwm duty range more than 50%, output pwm duty changes corresponding to same input pwm duty at all driving time. even if input duty of pwm signal is more less 50%, the motor can be started by this function. when input pwm duty is 0%, the motor can be stay stand-by mode. additionally, the motor changes idling mode in input pwm duty range from 0% to 2.5%. idling mode only runs circuit current (icc1) of ic. idling mode is made all outputs terminals to open state. (a) case a : input pwm duty 2.5% to 50% (b) case b : input pwm duty 50% to 100% figure 22. low duty start up function table 1 truth table input pwm duty and each outputs terminals input pwm duty [%] ic function (state) out1, out2 fg duty 0 off (stand-by mode) off, off (open state) h (output tr : off) duty 0 < 2.5 on (idle mode) off, off (open state) h (output tr : off) case a : duty 2.5 to 50 on (low duty start up driving) h / l, l / h h / l case b : duty 50 to 100 on (normal driving) h / l, l / h h / l
11/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 quick start function the quick start function is built into this series. when the pw m signal is input, this function can start up the motor at once regardless of the detection time of the lock protection function. (notice, need hall amp gain select time. reference is shown in figure 23.) stand-by mode stand-by function turns off the circuit when the time of pwm=l has elapsed in order to reduce stand-by current. the circuit current in stand-by mode is specified at the parameter ?circuit current 2? of electrical characteristics. figure 23. shows timi ng chart stand-by mode and quick start function. the 0% detection time for changing stand-by mode is variable by input pwm duty. because this ic has a lpf after pwm terminal. for example input pwm frequency 25khz, the characteristic 0% detection time and input pwm duty is shown in figure 24. figure 23. stand-by mode and quick start function 0 20 40 60 80 100 0.0 1.0 2.0 3.0 4.0 0% detection time : t0 [ms] input pwm duty [%] figure 24. characteristic 0% detection time and input pwm duty at 25khz lock protection and automatic restart motor rotation is detected by hall signal, and lock detection on time (ton) and lock detection off time (toff) are set by ic internal counter. external part (c or r) is not required. timing chart is shown in figure 25. out2 magnet direction n s n s n s n s s n s n s n s n s n n ton toff on out1 output tr off toff idling fg depends on hall signal ( h in this figure ) motor locking lock ditection lock release recovers normal operation figure 25. lock protection timing chart
12/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 equivalent circuit 1)supply voltage terminal 2) pwm signal input terminal 3) fg output terminal 4) motor output terminal hall position (reference data) vcc gnd vcc pwm 100k 10k fg gnd vcc gnd out2 out1
13/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 safety measure 1) reverse connection protection diode reverse connection of power results in ic destruction as shown in figure 26. when reverse connection is possible, reverse connection protection diode must be added between power supply and vcc. in normal energization reverse power connection after reverse connection destruction prevention circuit block vcc gnd each pin circuit block vcc gnd each pin circuit block vcc gnd each pin internal circuit impedance high amperage small large current flows thermal destruction no destruction figure 26. flow of current when power is connected reversely 2) measure against vcc voltage rise by back electromotive force back electromotive force (back emf) generates regenerative current to power supply. however, when reverse connection protection diode is connected, vcc voltage rises because the diode prevents current flow to power supply. on on on on phase switching figure 27. vcc voltage rise by back electromotive force when the absolute maximum rated voltage may be exceeded due to voltage rise by back electromotive force, place (a) capacitor or (b) zener diode between vcc and gnd. if necessary, add both (c). (d) capacitor and resister are improved esd surge destruction. (a) capacitor (b) zener diode on on on on (c) capacitor and zener diode (d) capacitor and resister on on on on figure 28. measure against vcc voltage rise
14/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 3) problem of gnd line pwm switching do not perform pwm switching of gnd line because gnd terminal potential cannot be kept to a minimum. figure 29. gnd line pwm switching prohibited 4) fg output fg output is an open collector and requires pull-up resistor. the ic can be protected by adding resistor r1. an excess of absolute maximum rating, when fg output terminal is directly connected to power supply, could damage the ic. figure 30. protection of fg terminal thermal derating curve thermal derating curve indicates power that can be consumed by ic with reference to ambient temperature. power that can be consumed by ic begins to attenuate at certain ambient temper ature. this gradient is determined by thermal resistance ja. thermal resistance ja depends on chip size, power consumption, package ambient temperature, packaging condition, wind velocity, etc., even when the same package is used. thermal derating curve indicates a reference value measured at a specified condition. figure 31. shows a thermal derating curve. 0 10 0 20 0 30 0 40 0 50 0 60 0 0 25 50 75 100 125 150 ambient temperature : ta [ =? ] power dissipation : pd [mw] reduce by 5.4mw/ over 25 . (70.0mm 70.0mm 1.6mm fr4 glass epoxy board) figure 24. thermal derating curve m controller vcc pwm input prohibite motor driver gnd fg protection resistor r1 connector of board pull-up resistor vcc
15/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 operational notes 1) absolute maximum ratings devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum ratings. because the cause of this damage cannot be identified as a shor t circuit or an open circuit, if any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) connecting the power supply connector backward connecting of the power supply in reverse polarity can damage ic. take precautions when connecting the power supply lines. an external direction diode can be added. 3) power supply line back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a capacitor between power supply and gnd for routing regenerated current. and fully ensure that the capacitor characteristics have no problem before determine a capacitor value. (when applying electrolytic capacitors, capacitance characteristic values are reduced at low temperatures) 4) gnd potential it is possible that the motor output terminal may deflect below gnd terminal because of influence by back electromotive force of motor. the potential of gnd terminal must be minimum potential in all operating conditions, except that the levels of the motor outputs terminals are under gnd level by the back electromotive force of the motor coil. also ensure that all terminals except gnd and motor output terminals do not fall below gnd voltage including transient characteristics. malfunction may possibly occu r depending on use condition, environment, and property of individual motor. please make fully confirmation that no problem is found on operation of ic. 5) thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation(pd) in actual operating conditions. 6) inter-pin shorts and mounting errors use caution when positioning the ic for mounting on printe d circuit boards. the ic may be damaged if there is any connection error or if pins are shorted together. 7) actions in strong electromagnetic field use caution when using the ic in the presence of a strong electromagnetic field as doing so may cause the ic to malfunction. 8) aso when using the ic, set the output transistor so that it does not exceed absolute maximum rations or aso. 9) thermal shut down circuit the ic incorporates a built-in thermal shutdown circuit (tsd circuit). operation temperature is 150 (typ.) and has a hysteresis width of 25 (typ.). when ic chip temperature rises and tsd circuit works, the output terminal becomes an open state. tsd circuit is designed only to shut the ic off to prevent thermal runaway. it is not designed to protect the ic or guarantee its operation. do not continue to use the ic after operation this circuit or use the ic in an environment where the operation of this circuit is assumed. 10) testing on application boards when testing the ic on an application board, connecting a capa citor to a pin with low impedance subjects the ic to stress. always discharge capacitors after each process or st ep. always turn the ic?s power supply off before connecting it to or removing it from a jig or fixture during the inspection process. ground the ic during assembly steps as an antistatic measure. use similar precauti on when transporting or storing the ic. 11) gnd wiring pattern when using both small signal and large current gnd patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. be careful not to change the gnd wiring pattern of any external components, either. 12) capacitor between output and gnd when a large capacitor is connected between output and gnd, if vcc is shorted with 0v or gnd for some cause, it is possible that the current charged in the capacitor may flow into the output resulting in destruction. keep the capacitor between output and gnd below 100uf. 13) ic terminal input when vcc voltage is not applied to ic, do not apply voltage to each input terminal. when voltage above vcc or below gnd is applied to the input terminal, parasitic element is ac tuated due to the structure of ic. operation of parasitic element causes mutual interference between circuits, resulti ng in malfunction as well as destruction in the last. do not use in a manner where parasitic element is actuated. 14) in use we are sure that the example of application circuit is pr eferable, but please check the character further more in application to a part which requires high precision. in using t he unit with external circuit constant changed, consider the variation of externally equipped parts and our ic including not only static character but also transient character and allow sufficient margin in determining. status of this document the japanese version of this document is formal specification. a customer may use this translation version only for a reference to help reading the formal version. if there are any differences in translation version of this document formal version takes priority
16/16 datasheet datasheet BU6906GF tsz02201-0h1h0b100080-1-2 ? 2012 rohm co., ltd. all rights reserved. 31.jul.2012 rev.002 www.rohm.com tsz22111 ? 15 ? 001 physical dimension tape and reel information ssof6 (unit:mm) marking diagram(s)(top view) ssof6(top view) part number marking lot numbe r a c 1 pin mark
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, ro hm 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 hm?s 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 rohm?s 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 bel ow), 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 descr ibed 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
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 c onsidering 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 hum idity 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 rohm?s 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 contain ed 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.
datasheet datasheet notice ? 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.

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