View BD8317GWL_8382025.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/ 20 tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 ? 14 ? 001 single-chip type with built-in fet switching regulator series step-up and inverted 2-channel dc/dc converter with built-in power mosfet BD8317GWL description the bd8317 gwl is step - up and in verted 2 - channel switching regulator with integrated interna l high - side mosfet . with wide input range from 2.5~5.5v ,it suitable for application of portable item. in addition ,the small package design is ideal for miniaturizing the power supply. features wide input voltage range of 2.5v to 5.5 v h igh frequency op eration 0.8 mhz i ncorporates nch fet of 230m /22v and pch pow fet of 230m /15v incorporates soft start (4.2msec(typ))and hight side switch of boost channel independent on/off signal(stb). built - in discharge sw for step up channel s mall package ucsp50l1( 1.8mm 1.5mm, 4 3 grid, 11pin, wlcsp) circuits protection ocp,scp,uvlo,tsd important specifications input voltage range output boost voltage output inverted voltage m aximum current operating frequency nch fet on resistance pch fet on resistance standb y current 2.5 5.5 [v] input voltage(max)~1 8 [v] - 9.0 - 1.0 [v] 1.0 a](max) 0.8 [mhz] (typ .) 230[m ] 230[m ] 1[ a](max) package ucsp50l1 (wlcsp) 1.8mm 1.5mm 0.5mm, 4 3 glid ,11pin, application lcd battery ccd battery portable items that are represente d by mobile phone and dsc structure : silicon monolithic integrated circuit typical a pplication input : 2.5 to 5.5 v, ch1 output : - 5.0 v / 100 m a (max) , ch2 output: 5.0 v / 100 ma (max) fig ure 1 . a pplication schematic dis1 vref non1 inv2 stb2 gn d lx2 hs2l vdd lx1 stb1 20 k 100 k 0.1uf/10v vout1: - 5.0 v/ 100 ma en ch1 30k 10 uf/1 6 v vout2: 5.0 v/ 100 ma 160 k 10 uh vin 10 uf/10v 10 uh en ch 10 uf/ 16 v 2.5 5.5v datashee t
2 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 fig ure 2 . pin assignment (bottom view) h pin description pin no. pin name function a - 1 vdd p ower input voltage pin . connect to input ceramic capacitor bigger than 0.47uf. a - 2 hs2l load sw output pin .connect to inductor a - 3 lx2 boost channel drain nch power mos . connect to diode and inductor. a - 4 gnd ground connection b - 1 lx1 pchpowermos dr ain of boost channel. connect to diode and inductor b - 3 stb1 enable pin of inverted channel. on threshold set to 1.5v. integrated pull down resistance (800k (typ)) b - 4 stb2 enable pin of boost channel. on threshold set to 1.5v. integrated pull down resistance (800k (typ)) c - 1 d is1 discharge sw of inverted channel. connect to output of inverted channel. stb1 disable , output pin voltage is discharged by 100 (typ) c - 2 vref reference voltage of inverted channel. 1.0v(typ) is included in error amp offset c - 3 non1 f eedback pin of inverted channel. connect to feedback resistance and set output voltage. the method of output voltage setting is p16/20 . w hen invert ed cannel is disable , the pin is discharged by integrated resistance (150 (typ)) c - 4 inv2 feedback pin of boost channel. connect to feedback resistance and set output voltage. t he method of output voltage setting is p16/20 . c b a 1 2 3 4
3 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h block diagram fig ure 3 . block diagram gnd lx1 ocp high side switch ch2 step up timing control (current mode) ch1 inver ting timing control (current mode) + - + - on/off voltage reference vref non1 inv2 stb1 stb2 lx2 hs2l vdd - + + scp timer phase compensation phase compensati on uvlo tsd protect to control + ss2 ss1 ss osc 0.8 mhz ss2 for analog ocp vo2 vo2 vo1 vin = 2.5 c> 5.5v vo1 10uf ss2 ss1 dis1 stb1
4 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h function blacks description 1. voltage reference this block generate s error amp reference voltage. the reference voltage of ch1 is 1.0v, the reference voltage of ch2 is 0.8v. 2.uvlo circuit for preventing malfunction at low voltage input. this circuit p revents malfunction at the start of dc/dc converter and low input voltage . the function m onitors vcc pin voltage and if vcc voltage is lower than 2.2v, function turns off all output of fets and dc/dc converter , and reset the timer latch of the internal scp circuit and soft - start circuit. 3.scp s hort - circuit pro tection function based on t imer latch system . when the voltage of non1 pin is higher than 0v or inv 2 pin voltage is lower than 0.8v , the internal scp circuit starts counting. scp circuit detects output of error amp. since internal error amp has highly gain as high as 80db or more, if input erroramp voltage cross reference voltage ,the output voltage of error amp goes high and detects scp . the internal counter is in synch with osc, the latch circuit activates after the counter counts oscillations to turn off dc/dc converter output (about 40.9 msec ). to reset the latch circuit, turn off the stb pin once. then, turn it on again or turn on the power supply voltage again. 4.osc this function determine oscillation frequency . oscillation frequency of dc/dc c onverter set at 0.8 mhz. 5.error amp error amplifier watch output voltage and output pwm control signals . the internal reference voltage for error amp of ch1 is set at 0 v . the internal reference voltage for error amp of ch2 is set at 0.8 v . 6. timing con trol v oltage - pulse width converter for controlling output voltage corresponding to input voltage . comparing the internal slope waveform with the error amp output voltage, pwm comp controls the pulse width and output s to the driver. max dut ies of ch1 and ch 2 are set at 86%. 7.soft start circuit for preventing in - rush current at the start of dc/dc converter by bringing the output voltage . soft - start time is in synch with the internal osc, and the output voltage of the dc/dc converter reaches the set volta ge after about 4.2m sec . 8. ocp circuit for preventing malfunction at over current. under input current over electrical characteristics , it supply minimum duty to dc/dc converter and ic stop safety by scp detected. 9.tsd circuit for preventing malfunct ion at high temperature . when it detects an abnormal temperature exceeding maximum junction temperature (tj=1 5 0 ` ), it turns off all output fet, and turns off dc/dc comparator output. 10 . on/off voltage applied on stb pin to control on/off channel of each channel. turned on when a voltage of 1 .5 v or higher is applied and turned off when the terminal is open or 0 v is applied. incorporates approximately 8 n sxoo - down resistance.
5 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h absolute maximum ratings(t=25 ` ) parameter symbol rating unit maximum power supply voltage vdd b 0.3 c> 7 v stb1,stb2 b 0.3 c> 7 v maximum input current ihs2l 1.0 a ilx1 1.0 a ilx2 1.0 a maximum input voltage vdd - lx1 15 v lx2 22 v non1 - 0.3 c> 7 v inv2 - 0.3 c> 7 v dis1 - 9 c> 0.3 v power dissipation pd 730 mw operating temperature range topr b 35 c> +85 =? storage temperature range tstg b 55 c> + 150 =? junction temperature t jmax + 1 50 =? ((*1 ) when mounted on 74.2 ; 74.2 ; 1.6mm and operated over 25 =? pd reduces by 4.96mw/ =? . h recommended operating conditions parameter symbol standard value units min typ max power supply voltage v dd 2.5 b 5.5 v inverted output voltage vo1 - 9.0 b - 1.0 v step up output voltage vo2 vcc - 18 v
6 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h electrical characteristics b ta=25 =? , vdd =3 .6 v b g this product is not designed for normal operation within a radioactive environment. parameter symbol standard value unit conditions min typ max a low voltage input malfunction preventing circuit ay detect threshold voltage v uv - 2.2 2.35 v v dd sweep down hysteresis voltage ? v uv hy 50 100 150 mv a oscillator ay oscillating frequency f osc 0.72 0.8 0.88 mhz lx1 max duty dmax1 82 86 90 % lx2 max duty dmax2 82 86 90 % a error amp, vref ay ch1output voltage vo1 - 5.06 - 5.00 - 4.94 v non1 feedb ack resistance 20k , 100 k vref line regulation dvli - 4.0 12.5 mv vdd=2.5 c> 5.5v inv threshold voltage vinv 0.792 0.800 0.808 v non1 input bias current inon1 - 50 0 50 na stb1=3.6 v, non1= - 0.2v inv2 input bias current iinv2 - 50 0 50 na inv2=1.2v ch1 sof t start time tss1 3.7 4.2 4.7 ms ch2 soft start time tss2 3.7 4.2 4.7 ms a internal fet ay lx1 pmos on resistance r on 1p - 230 480 m dis1discharge resistance r dis1 - 100 160 vstb1=0v, idis1= - 1ma non1 discharge resistance r non1 - 150 240 vstb1=0v, inon1=1ma lx2highsidesw on resistance r on 2p - 130 220 m lx2 nmos on resistance r on 2n - 230 480 m lx1 ocp threshold iocp1 1.2 2.4 - a lx2 ocp threshold iocp2 1.2 2.4 - a hs2l leak current ileak h1 - 1 0 1 ua lx1 leak current i leak1 - 1 0 1 ua l x2 leak current i leak2 - 1 0 1 ua a stb ay stb pin c ontrol voltage a ctive v stb h 1.5 - 5.5 v n on - active v stb l - 0.3 - 0.3 v stb pin pull down resistance r stb 1 500 800 1400 k a circuit current ay standby current i stb - - 1 ua circuit current of operat ion vdd idd - 500 650 ua stb1=stb2=3.6v non1= - 0.2v, inv2=1.2v
7 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h reference data ( unless otherwise specified ta=25 ` , vcc=3.6v) fig ure 4 . vref vs temp fig ure 5 . inv2 threshold vs temp fig ure 6 . oscillation frequency vs temp d etect threshold reset threshold fig ure 7 . uvlo detect threshold v s temp vcc=2.5v vcc=3.6v vcc=4.2v vcc=2.5v vcc=3.6v vcc=4.2v vcc=2.5v vcc=3.6v vcc=4.2v
8 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 fig ure 8 . stb on threshold voltage vs temp figure 9 . stb off threshold voltage vs temp figure 11 . lx2 high side fet on registance vs vc c vcc=2.5v vcc=3.6v vcc=4.2v figure 10 . lx1 high side fet on registance vs vcc vcc=2.5v vcc=3.6v vcc=4.2v t=150 ` t=25 ` t= - 60 ` t=150 ` t=25 ` t= - 60 ` 0 50 100 150 200 250 300 350 400 450 500 0 2 4 6 8 on resistance[m ] vcc[v] 0 50 100 150 200 250 300 350 400 450 500 0 2 4 6 8 on resistance[m ] vcc[v]
9 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 fig ure 12 . hs2l high side fet on registance vs vcc fig ure 13 . dis1 discharge sw on registance vs vcc fig ure 14 . non1 discharge sw on registance vs vcc figure 15 . vcc input current vs vcc (stb on) t=150 ` t=25 ` t= - 60 ` t=150 ` t=25 ` t= - 60 ` t= - 60 ` t=25 ` t=150 ` vcc current [ua] vcc[v] 0 50 100 150 200 250 300 350 400 450 500 0 2 4 6 8 on resistance[m ] vcc[v] 0 50 100 150 200 250 300 0 2 4 6 8 on resistance[ ] vcc[v] 0 50 100 150 200 250 300 0 2 4 6 8 on resistance[ ] vcc[v]
10 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 figure 16 . vcc input current vs temp (stb off) vcc=2.5v v cc=3.6 v v cc=4.2 v
11 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h example of a pplication 1 input : 2.5 to 5 .5 v, ch1 output : - 5. 0 v / 100 m a (max) , ch2 output: 5.0 v/ 100 ma (max) fig ure 17 . example of a pplication 1 30 v/200ma ( rb521 - s30 ) 30v/200ma ( rb521 - s30 ) 10 ? h ( dfe252012c ) 10 ? f/10v 10 ? f/16v 10 ? f/16v 10 ? h ( dfe252012c ) 0. 1 ? f/10v 100k 20k 30 k 160k BD8317GWL csp - smt
12 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h example of b oard layout rohm smd evaluation board fig ure 18. assembly layer figure 19. bottom layer
13 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h typical performance characteristic ( unless otherwise specified, ta = 25 c , vcc = 3.6 v ) ( example of app lication 1 ) figure 22. ch1 output voltage vs output current figure 20. ch1 power conversion efficiency vs output current fig ure 21. ch2 power conversion efficiency vs output current figure 23. ch2 output voltage vs output current
14 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 figure 26. ch1 output current respons e (output current : 10ma
100ma) figure 27. ch2 output current respons e (output current : 10ma
100ma) figure 24. ch1 output voltage vs input voltage figure 25. ch2 output voltage vs input voltage 5msec /div vo1 =100mv/div io =100ma/div 5msec /div v o2 =100mv/div io =100ma/div
15 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 figure 28. ch1 soft start waveform figure 29. ch2 soft start waveform figure 30. ch1 discharge waveform [500usec/ div] (stb1:high low)
16 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h selection of p art s for a pplications ( 1) output inductor a shielded inductor that satisfies the current rating (current value, ipe ak as shown in the drawing below) and has a low dcr (direct current resistance component) is recommended. inductor values affect o utput ripple current greatly . ripple current can be reduced as the inductor l value becomes larger and the switching frequency becomes higher as the equation s shown below . (iilflhqf\ (<0.92 ) , f: switching frequency (1.6mhz), l: inductance , the second terms of equations above are ripple current of the inductor( il of fig.32 ) which should be set at about 20 to 50% of the maximum out put current. 9? current over the inductor rating flowing in the inductor brings the inductor into magnetic saturation, which may lead to lower efficiency or output bad oscillation. select an inductor with an adequate margin so that the peak current does not exceed the rated current of the inducto r . (2 ) output capacitor ch1 the reference voltage of ch1 is 1.0v and t he internal reference voltage of the error amp is 0 v. output voltage should be obtained by referring to equation ( 3 ) of fig. 33. ch2 the internal reference voltage of the error amp is 0.8 v. output voltage should be obtained by referring to equation ( 4 ) of fig. 34. figure 33 ch2 output setting i nside reference voltage 0.8v vout r2a r2b inv2 (inverted channel) (boost channel) vref 1.0 v figure 32. ch1output setting error amp r1b r1a non1 vout fig. ure 31. ripple current ) 4 ( 8 . 0 2 ) 2 2 ( ?nnn?? ? ? ? b r b r a r v out ?? ) ( ) ( 2 1 f out in f out in out in f out in peak v v v f l v v v i v v v v i ? ? ? ? ? ? ? ? ? ? ? ? ? ?? out in out in in out out peak v f l v v v v v i i ? ? ? ? ? ? ? ? ? ) ( 2 1 ? ? i l ) 3 ( 1 1 ?nnn?? b r a r v out ? ?
17 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 (3) output capacitor a ceramic capacitor with low esr is recommended for output in order to reduce o utput ripple. there must be an adequate margin between the maximum rating and output voltage of the capacitor, taking the dc bias property into consideration. output ripple voltage when ceramic capacitor is used is obtained by the following equation. co is set within the range of 1 :* 20uf. setting must be performed so that ou tput ripple is within the allowable ripple voltage. vpp= il ? 9 il ? r esr [v] 2 ?? f ? co 1
18 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h i/o equivalence circuit figure 34. i/o equivalence circuit vref non1,inv2 stb1,stb2 vcc,lx1,dis1,gnd hs2l lx2 vcc vcc vref stb1,stb2 vcc vcc vcc non1,inv2 vcc dis1 lx1 gnd lx2 vcc vcc hs2l
19 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h operation notes 9y .) absolute maximum ratings this product is prod uced with strict quality control . h owever , the ic may be destroyed if operated beyond its absolute maximum ratings. if the device is destroyed by exceeding the recommended maximum ratings, the failure mode will be difficult to determine. (e.g. short mode , open mode) therefore, physical protection counter - measures (like fuse ) should be implemented when operating conditions beyond the absolute maximum ratings anticipated. 9t .) gnd potential make sure gnd is connected at lowest potential. 9? .) setting of heat make sure that power dissipation does not exceed maximum ratings. 9 .) pin short and mistake fitting avoid placing the ic near hot part of the pcb. this may cause damage to ic. also make sure that the output - to - output and output to gnd condition will not happen because this may damage the ic. 9 .) actions in strong magnetic field exposing the ic within a strong magnetic field area may cause malfunction. 9a .) mutual impedanc e use short and wide wiring tracks for the main supply and ground to keep the mutual impedance as small as possible. use induct or a nd capacitor network to keep the ripple voltage minimum. 9? .) thermal shutdown circuit (tsd circuit) the ic incorporates a b uilt - in thermal shutdown circuit (tsd circuit). the thermal shutdown circuit (tsd circuit) is designed only to shut the ic off to prevent runaway thermal operation. it is not designed to protect the ic or guarantee its operation. do not continue to use the ic after operating this circuit or use the ic in an environment where the operation of this circuit is assumed. 9? .)rush current at the time of power supply injection. an ic which has plural power supplies, or cmos ic could have momentaly rush curr ent at the time of power supply injection. because there exists inside logic uncertainty state. please take care about power supply coupling capacity and width of power supply and gnd pattern wiring. 9? .)ic terminal input this ic is a monolithic ic t hat has a p - board and p+ isolation for the purpose of keeping distance between elements. a p - n junction is formed between the p - layer and the n - layer of each element, and various types of parasitic elements are then formed. for example, an appl ication where a resistor and a transistor are connect ed to a terminal (shown in fig.36 ): d when gnd > (terminal a) at the resistor and gnd > (terminal b) at the transistor (npn), the p - n junction operates as a parasitic diode. d when gnd > (terminal b) at the transistor (npn), a parasitic npn transistor operates as a result of the nhayers of other elements in the proximity of the aforementioned parasitic diode. parasitic elements are structurally inevitable in the ic due to electric potential rela tionships. the operation of parasitic elements induces the interference of circuit operations, causing malfunctions and possibly the destruction of the ic. please be carefu l not to use the ic in a way that would cause parasitic elements to operate. for e xample, by applying a voltage that is lower than the gnd (p - board) to the input terminal . parasitic element 9? terminal b 9? transistor ( npn) :* :* gnd p - board n p 9 n p 9 p 9 b n e c gnd p - board n p n n p 9 p 9 9? terminal a 9? parasitic element resistor figure 35. simplified structure of a bipolar ic :* :* 9? terminal a 9? gnd parasitic element
20 / 20 b d8317gw l tsz02201 - 0q2q0aj00010 - 1 - 2 ? 20 11 rohm co., ltd. all rights reserved. 2012.09.5 rev. 001 www.rohm.com ts 22111 n 14 n 001 h ordering p art number b d 8 3 1 7 g w l - e2 part no. part no. package gwl: ucs p50l1 packaging and forming specification e2: embossed tape and reel h external information (bd8316gwl) 4 0 . 3 0 . 05 c 1 . 8 0 . 05 b b 2 11 - 3 0 . 20 0 . 05 a 0 . 06 s 0 . 1 0 . 0 5 1 0 . 3 5 0 . 0 5 s 1 . 5 0 . 0 5 3 1 pin mark b p = 0 . 4 2 0 . 5 5 m a x a p = 0 . 4 3 ( 3 0 . 15 ) index post 0 . 05 a 831 7 lot no . (BD8317GWL) (bd8317 gwl)
datasheet d a t a s h e e t notice-pga-e rev.001 ? 2015 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 us ed on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, 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-pga-e rev.001 ? 2015 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 indepen dent 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 concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm 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. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circui ts, systems or external equipment (including software). 3. 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 products or the informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. 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 ? 2015 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.

▲Up To Search▲

Price & Availability of BD8317GWL

	To Download BD8317GWL Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .