View BD6074GUT_8054932.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

BD6074GUT 1/15 www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. led drivers for lcd backlights white backlight led drivers for small to medium lcd panels (switching regulator type) BD6074GUT description the BD6074GUT is a white led driver ic with sync hronous rectification that can drive up to 4leds. with synchronous rectification (no external shottky diode required) and small package, they can save mount space. and the brightness of led can be adjus ted by using pwm pulse on en pin. features 1) synchronous rectific ation boost dc/dc converter 2) no external schottky diode required 3) driving 4 series white leds 4) over voltage protection 5) protect open and short output 6) thermal shut down 7) brightness adjustment by external pwm pulse 8) small and thin csp package in 8pins applications white led backlight torch light and easy flash for camera of mobile phone absolute maximum ratings (ta=25 ) parameter symbol ratings unit condition maximum applied voltage 1 vmax1 7 * 1 v vin, en, vfb, test maximum applied voltage 2 vmax2 20 * 1 v sw, vout power dissipation pd 800 * 2 mw operating temperature range topr -30~+85 storage temperature range tstg -55~+150 *1 these value are based on gnd and gnda pins. *2 50mm58mm1.75mm at glass epoxy board mount ing. when it?s used by more than ta=25 , it?s reduced by 6.4mw/ . operating range ta = - 3 0 ~+85 parameter symbol ratings unit condition min. typ. max. power supply voltage vin 2.7 3.6 5.5 v no.11040eat39
technical note 2/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristics unless otherwise specified ta =-30 ~+85 , vin=3.1~5.5v parameter symbol limits unit condition min. typ. max. [ en terminal ] en threshold voltage (low) vthl - - 0.4 v en threshold voltage (high) vthh 1.4 - - v en terminal input current iin - 18.3 30.0 a en=5.5v en terminal output current iout -2.0 -0.1 - a en=0 [ switching regulator ] quiescent current iq - 0.1 2.0 a en=0v current consumption idd - 1.1 1.5 ma en=2.6v,vfb=1.0v,vin=3.6v feedback voltage vfb 0.47 0.50 0.53 v inductor current limit icoil 310 400 490 ma vin=3.6v *1 sw saturation voltage vsat - 0.10 0.28 v isw=200ma, vout=13v sw on resistance p ronp - 2.1 3.2 ? ipch=200ma,vout=13v switching frequency fsw 0.8 1.0 1.2 mhz duty cycle limit duty 82.7 92.5 - % vfb=0v output voltage range vo - - 18.0 v over voltage limit ovl 18.0 18.5 19.0 v vfb=0v start up time ts - 0.5 1.0 ms *1 this parameter is tested with dc measurement.
technical note 3/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. test circuit *test circuit a (for inductor current limit, feedback voltage, start up time.) procedure ~inducton current limit~ 1. start to increase iout from 0ma gradually. 2. you will find that vout will start to go down and the duty will be decreased. 3. then, you can measure the coil cu rrent as ?inductor current limit? ~vfb voltage~ 1. supply 0ma to iout 2. then, you can measure the vfb voltage as ?feedback voltage?. ~start up time~ 1. supply the voltage to vin 2. then,you can measure the vfb waveform as ?start up time?. fig.1 test circuit a *test circuit b (for over voltage limit,duty cycle limit, switching frequency) procedure ~over voltage limit~ 1. start to increase vout from 9v to 20v 2. you will find frequency change from around 1mhz to 0hz 3. then,it is ?over voltage limit? ~duty cycle limit, switching frequency ~ 1. supply 9v to vout terminal 2. then,you can measure the duty as ?duty cycle limit? and the frequency and ?switching frequency?. fig.2 test circuit b *test circuit c (for quiescent current, current comsumption, en terminal input/output current, en threshold voltage(low/high)) fig.3 test circuit c icoil vin sw vout en gnda test gnd vfb 22h 1f 24 ? v in rfb a iou t vin sw vout en gnda test gnd vfb 1f vin 3.1~5.5v 9v to 20v tall ton duty= tall ton monitor 1f vin sw vout en gnda test gnd ien 3.1~5.5v test a a icc vfb 1uf 0.0~5.5v 1.0v(current comsumption)
technical note 4/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (reference data) 0 2 4 6 8 10 12 14 1234567 vin[v] iin[ma] 0.0 0.2 0.4 0.6 0.8 1.0 1234567 vin[v] iin[ua] 0.8 0.9 1.0 1.1 1.2 2.5 3 3.5 4 4.5 5 5.5 vin[v] frequency [mhz] fig.4 current consumption fig.5 quiesc ent current fig.6 oscillation frequency vs. vs. vs. power supply voltage power supply voltage power supply voltage 470 480 490 500 510 520 530 2.73.13.53.94.34.75.15.5 vin[v] vfb[mv] 270 290 310 330 350 370 390 410 430 -30 -10 10 30 50 70 ta [deg] inductor current [ma] 50 55 60 65 70 75 80 85 90 10 15 20 25 30 35 40 iout[ma] efficiency[%] fig.7 feedback voltage fig.8 inductor curr ent limit fig.9 efficiency vs. led current vs. vs. (4led=vout14v) power supply voltage temperature 50 55 60 65 70 75 80 85 90 10 15 20 25 30 35 40 iout [ma] efficiency [%] 0 200 400 600 800 1000 1200 1400 1600 3.0 3.2 3.4 3.6 3.8 4.0 4.2 vin[v] output power[mw] 50 55 60 65 70 75 80 85 90 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 vin[v] efficiency[%] fig.10 efficiency vs. led current fig.11 output power fig.12 efficiency (4led=vout14v) vs. vs. coil : toko db3015ck power supply voltage power supply voltage coil : toko db3015ck (load=34ma) coil : toko db3015ck 85 ta =85 ta =25 ta =-30 vin=5.5v vin=3.6v vin=3.1v vin=3.1v vin=3.6v vin=4.2v vin=5.5v ta =25 toko : db3015ck murata : lqh32cn53l ta =-30 ta =25 ta =85 ta =25 ta =-30 ta =85 ta =-30 ta =25 ta =85 ta =25 ta =-30 ta =85 ta =25 ta =-30 ta =85
technical note 5/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. electrical characteristic curves (reference data) ? continued 2.iin =1.66v 5.3ms idd=1.5ma 1.vout 1v/div ac 2.iin 200ma/div dc (4ms/div) 1.vout 1.en 4.iin 3.vfb 2.vout peak=204ma 1.en 2v/div dc 2.vout 5v/div dc 3.vfb 500mv/div dc 4.iin 200ma/div dc (3ms/div) fig.13 led open output voltage fig.14 led bri ghtness adjustment fig.15 soft start vin=3.6v ta =25 vin=3.6v, ta=25 o c 4led, 34ma load 1.en 2.vout 3. vfb 4. iin peak=368ma vin=3.6v, ta=25 4led, 34ma load 0 50 100 150 200 250 300 350 400 450 500 0 102030405060708090100 duty[%] vfb[mv] vin=4.2v vin=3.6v vin=5.5v vin=2.9v vin=3.1v fig.16 led brightness adjustment for pwm control 0 10 20 30 40 50 0246810 duty[%] vfb[mv] vin=3.9v vin=3.1v vin=4.2v vin=5.2v fig.17 led brightness adjustment for pwm control (expansion) -50% -40% -30% -20% -10% 0% 10% 20% 30% 40% 50% 0246810 duty[%] vfb voltage variation vin=3.1v vin=4.2v vin=5.2v vin=3.6v fig.18 led brightness variation for pwm control (comparison of vfb at vin=3.9v)
technical note 6/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. block diagram and pin configuration + + - osc control current sence q + - 24 ? s q r tsd - + vin c in sw vout v fb test en gnda gnd 300k ? 1f l 22h c out 1f r fb - + white led over voltage protect short protect pwmcomp erramp q2 q1 fig.19 block diagram and recommended circuit diagram c1 b1 a1 a2 a3 b3 c3 c2 fig.20 pin location diagram vcsp60n1( 8 pin ) pin assignment table pin name in/out ball number function gnda - a1 analog gnd en in a2 enable control (pull down by inner resistor) test in a3 test input (pull down by inner resistor) vin in b1 power supply input vfb in b3 feedback voltage input vout out c1 boost output sw in c2 switching terminal gnd - c3 power gnd operation BD6074GUT is pwm current mode dc/dc conv erter with fixed frequency. it adopts sy nchronous rectificat ion architecture. the feature of the pwm current mode is that input is the combination of erro r components from the error amplifier, and a current sense signal that controls t he inductor current into slope waveform for sub harmonic oscillation prevention. this output controls q1 and q2 via the rs latch. timing of q1 and q2 is precisely adjusted so that they wi ll not turn on at the same time, thus putting them into non-overlapped relation. in the period when q1 is on, energy is accumulated in the external inductor, and in the period when q1 is off, energy is transferred to the capacitor of vout via q2. further more, BD6074GUT has many safety functions, and their detection signals stop sw itching operation at once.
technical note 7/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. description of functions 1) soft start and off status BD6074GUT has soft start function and off status function. the soft start function and the off status function prev ent large current from flowing to the ic via coil. the soft start function prevents rush current when turning on and the off status function prevents invalid current when turning off. ? soft start when vout is smaller than vshort, to decrease charge current pmos is set to off by pmos startup control (in term ?i?). vshort means ?vout short detect voltage?. after vout is bigger than vshort, pmos is turned on and start switching. in term ?ii? (vshor t < vout < vin), status of current limiter is ?soft mode?. so ?a? voltage is restrict ed and ?d? duty is kept low. therefore vout voltage goes up slowly and coil current is restricted. in term iii (vout > vin), status of current limiter is ?no rmal mode?. so ?a? voltage goes up suitable voltage, and ?d? duty goes up slowly. and then vout voltage goes up to required voltage. operation max current current at start 450ma current at pwm 300ma fig. 21 lock diagram of soft start and off status fig. 22 timing chart ? off status the gate voltage of the switching tr ei ther "h" or "l" at power off depends on the operation conditions at that time. when it is fixed to "h", the switching tr remains to be on, and invalid current from the battery is consumed. in order to prevent this, at power off, d is always fixed to l level. so that, it is possible to prevent invalid current at power off. led current 24ohm fb vout charge current a d r s q q sw l c pwm comp osc b off status erramp soft reference soft current limit pmos startup control soft mode d d c c u u r r r r e e n n t t l l i i m m i i t t normal mode v v o o u u t t vshor t vin i i i i i i i i i i i i e e n n
technical note 8/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. 2) isolation control BD6074GUT has isolation control to prevent led wrong lighting at power off. the c ause of the led wrong lighting is leak current from vin to the white led. ther efore, when BD6074GUT powered off (en = l), the isolation control cuts the dc path between sw and vout, so that, it prevent s from leak current from vin to led. vin sw vout vfb white led fig.23 isolation control 3) short-circuit protection and over voltage protection BD6074GUT has short-circuit protection and over voltage prot ection. these detect the voltage of vout, and at error, they stop the output tr. details are as shown below. ? short-circuit protection in the case of short-circuit of the dc/dc output (v out) to gnd, the coil or the ic may be destroyed. therefore, in a case of error as vout becomes 0.7v or lower, the under detect or shown in the figure works, and turns off the output tr, and prevent the coil and the ic from being destroyed. and the ic turns into non operation condition from operation condition, and current does not flow to the coil (0ma). ? over voltage protection in a case of error as the ic and the led being cut off, over voltage causes the sw terminal and the vout terminal exceed the absolute maximum ratings, and may destroy the ic. therefore, when vout becomes 18.5v or higher, the over voltage limits works, and turns off the output tr , and prevents the sw terminal and the vout terminal from exceeding the absolute maximum ratings. at this moment, turns into non operation condition from op eration condition, and the output voltage goes down slowly. and, when the output voltage becom es the hysteresis of the over voltage limit or below, the output voltage goes on up to 18.5v once again. this protection action is shown in fig.24. fig.24 block diagram of short-circuit protection and over voltage 4) thermal shut down BD6074GUT has thermal shut down function. the thermal shut down works at 175 ? c or higher, and while holding the setting of en control from the outside, turns into non operation condition from operat ion condition. and at 175 ? c or below, the ic gets back to its normal operation. vout over detector cont rol under detector over voltage ref under voltage ref driver sw cout
technical note 9/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. start control and brightness control BD6074GUT can control the start conditions by its en terminal , and power off at 0.4v or below, and power on at 1.4v or higher. and by changing the duty of power on and of f by pwm control, the led brightness can be adjusted. two techniques are available for the brightness adjustment. one is pwm adjustment, and the other is analog adjustment. (1) pwm brightness adjustment is done by giving pwm signal to en as shown in fig.25. the BD6074GUT is powered on/off by the pwm signal. by this method, led current is controlled from 0 to the maximum current. the average led current increases with proportion to the duty cycle of pwm signal. while in pwm off-cycle mode, the ic and led both consume no currents, thus providing a high-efficiency operation. the recommended pwm frequency is 100hz ~ 300hz. vin sw vout en gnda test gnd vfb 22h 1f 24 ? vin pwm fig.25 the brightness adjustment example of en terminal by pwm (fpwm = 100 ~ 300hz) (2-1) analog brightness adjustment is made by giving dc control voltage to vfb pin of BD6074GUT via a series resistor as shown in fig.26. led brightness (current) changes by giving dc voltage to vfb directly. dc voltage is given from filtered one of dac signal, or pwm signal shown in fig.28. the advant age of this approach is that the pwm signal to be used to control the led brightness can be set to a high frequency (1khz or higher). led current (iled) is approximat ed by the following equation. iled = [[(vfb-dac) / r1] * r2 + vfb ] / rfb vin sw vout en gnda test gnd vfb 22h 1f 24 ? 4.7k ? 22k ? vin dac r2 r1 rfb iled -5 0 5 10 15 20 25 30 00.511.522.533.54 1 1.5 2 2.5 3 3.5 4 30 25 20 15 10 5 0 -5 0 0.5 iled [ma] dac [v] (vfb=500mv) fig.26 the brightness adjustment ex ample by dac fig.27 dac adjustment vin sw vout en gnda test gnd vfb 22h 1f 30 ? 33k ? 47k ? 47nf 100k ? vin pwm iled 10khz 0~2.85v 0 5 10 15 20 25 0 102030405060708090100 hi duty [%] iled [ma] fig.28 the brightness adjustment example of vfb terminal by pwm fig.29 vfb pwm control (f pwm = 10khz)
technical note 10/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. 2-2) the below the brightness adjustment is done in adju sting of r2 on time at duty cycle of r1 and pwm. the minimum value of the led current is decided by vfb / r1 at the pwm 0%, the maximum value of the led current is decided by vfb / r2 at the pwm 100%. i led is given as shown below. iled=vfb / r1 + vfb / r2 x hi duty vin sw vout en gnda test gnd vfb 22h 1f 47 ? vin 47 ? pwm 1khz r2 r1 0 5 10 15 20 25 0 102030405060708090100 hi duty [%] iled [ma] fig.30he brightness adjustment example of vfb terminal by pwm fig.31fb pwm control (f pwm =100~1khz) setting range of led current led current is determined by the voltage of vfb and the resistor connected to vfb terminal. i led is given as shown below. i led =v fb /r fb the current in the standard application is as shown below. v fb =0.5v, r fb =24 ? i led =20.8ma reference the maximum value of r fb is 30kohm and minimum current of i led is 16ua. fig.32 standard application the shaded portion in the figure below is the setting range of led current to become the standard. depending on coils and white leds to be used, however, some ics may not be used at desired currents. consequently, for the proper setting of led current, thoroughly check it for the suitability under use conditions including applicable power supply voltage and temperature. fig.33 setting range of led current vin sw vout en gnda test gnd vfb 22h 1f 24 ? vin pwm 1 f rfb iled 0 10 20 30 40 50 60 70 80 7 8 9 101112131415161718 vout[v] iled[ma] min 16ua
technical note 11/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. selection of external parts recommended external parts are listed as below. when to use other parts than these, sele ct the following equivalent components. ? coil value tolerance manufacturer product number size dcr ( ? ) vertical size horizontal size height 22h 10% murata lqh32cn2 20k53 2.5 3.2 1.55 0.71 22h 20% tdk vlf3012at 220mr33 2.6 2.8 1.2 0.66 22h 20% coil craft do1608 4.45 6.6 2.92 0.37 22h 20% tdk vlf3010at 220mr33 2.6 2.8 1.0 1.30 please refer to the reference data of p.4 for the change in the efficiency when the coil is changed. ? capacitor value manufacturer product number size temperature range vertical size horizontal size height cin 1f murata grm188b11a105k 1.6 0.8 0.8 -25 ~+85 cout 1f murata grm188b11e105k 1.6 0.8 0.8 -25 ~+85 ? resistor value tolerance manufacturer product number size vertical size horizontal size height r fb 24 ? 1% rohm mcr006yzpf24r0 0.6 0.3 0.23 the coil is the component that is most influential to efficien cy. select the coil which direct current resistor (dcr) and current - inductance characteristic are excellent. the bd 6074gut are designed for the inductance value of 22h. please do not use other inductance value. select a capacito r of ceramic type with excellent frequency and temperature characteristics. further, select capacitor to be used for ci n/cout with small direct current resistance, and pay much attention to the pcb layout shown in the next page.
technical note 12/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. pcb layout in order to make the most of the performance of this ic, pcb layout is very important. please note that characteristics such as efficiency and ripple will likely to change greatly depending on pcb layout. to battery gnd gnda en test vin vfb vout sw gnd cin cout r led to battery power source l1 fig.34 pcb layout connect the input bypath capacitor cin between vin and gnda pin closely, as shown in the upper diagram. thereby, the input voltage ripple of the ic can be reduc ed. and, connect the output capacitor cout between vout and gnd pin closely. thereby, the output voltage ripple of t he ic can be reduced. connect the current setting rled fb pin closely. connect the gnd closely connection side of rled direct ly to gnd pin. connect the gnda pin di rectly to gnd pin. when those pins are not connected directly near the chip, the performance of bd 6074gut shall be influenced and may limit the current drive performance. as for the wire to the inductor, make its resi stance component small to reduce electric power consumption and increase the entire efficiency. please keep away which are s ubject to be influenced like fb pin in wire connection with sw. the layout pattern in consideration of these is shown in the next page. 112mvpp vout (vbat=3.6v, ta=25 o c, vout=14v. 20ma load) fig.35 output noise
technical note 13/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. recommended layout pattern v g vbat gnd en fb vout rfb cout l1 vout led led cin gnda led sw fig.36 front surface (top view) v g vout vout gnd sw fig.37 rear surface (top view) attention point for pcb layout for pcb design, the wire of power supply line should be low impedance, and put bypass capacitor if necessary. especially the wiring impedance must be low around dc/dc converter. about heat loss for heat design, operate dc/dc conver ter in the following condition. (the following temperature is a guaranteed temperature, margin will be needed.) 1. periphery temperature ta must be less than 85 . 2. the loss of ic must be less than dissipation pd.
technical note 14/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. notes for use 1) absolute maximum ratings an excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. if any special mode exceeding the absolute maximum ratings is a ssumed, consideration should be given to take physical safety measures including the use of fuses, etc. 2) operating conditions these conditions represent a range within which characteri stics can be provided approx imately as expected. the electrical characteristics are guaranteed under the conditions of each parameter. 3) reverse connection of power supply connector the reverse connection of power supply connector can br eak down ics. take protec tive measures against the breakdown due to the reverse connection, such as mounting an external diode between the power supply and the ic?s power supply terminal. 4) power supply line design pcb pattern to provide low impedance for the wiring between the power supply and the gnd lines. in this regard, for the digital block power supply and the analog block power supply, even though these power supplies has the same level of potential, separate t he power supply pattern for the digital blo ck from that for the analog block, thus suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns. for the gnd line, give consider ation to design the patterns in a similar manner. furthermore, for all power supply terminals to ics, mount a capacitor between the power supply and the gnd terminal. at the same time, in order to use an electrolytic capacito r, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occu rrence of capacity dropout at a low temperature, thus determining the constant. 5) gnd voltage make setting of the potential of the gnd terminal so that it will be maintained at the minimum in any operating state. furthermore, check to be sure no terminals are at a potentia l lower than the gnd voltage including an actual electric transient. 6) short circuit between terminals and erroneous mounting in order to mount ics on a set pcb, pay thorough attention to the direction and offset of the ics. erroneous mounting can break down the ics. furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the gnd terminal, the ics can break down. 7) operation in strong electromagnetic field be noted that using ics in the strong elec tromagnetic field can malfunction them. 8) inspection with set pcb on the inspection with the set pcb, if a capacitor is connect ed to a low-impedance ic terminal, the ic can suffer stress. therefore, be sure to discharge from t he set pcb by each process. furthermore, in order to mount or dismount the set pcb to/from the jig for the inspection process, be sure to turn off the power supply and then mount the set pcb to the jig. after the completion of the inspection, be sure to tu rn off the power supply and then dismount it from the jig. in addition, for protection against static electricity, establis h a ground for the assembly process and pay thorough attention to the transportation and t he storage of the set pcb. 9) input terminals in terms of the construction of ic, parasitic elements are in evitably formed in relation to potential. the operation of the parasitic element can cause interference with circuit operati on, thus resulting in a malf unction and then breakdown of the input terminal. therefore, pay thorou gh attention not to handle the input te rminals, such as to apply to the input terminals a voltage lower than the gnd respectively, so t hat any parasitic element wi ll operate. furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the ic. in addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. 10) ground wiring pattern if small-signal gnd and large-current gnd are provided, it will be recommended to separate the large-current gnd pattern from the small-signal gnd pattern and establish a si ngle ground at the reference poi nt of the set pcb so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the small-signal gnd. pay att ention not to cause fluctuations in the gnd wiring pattern of external parts as well. 11) external capacitor in order to use a ceramic capacitor as the external capacitor, determine the c onstant with consideration given to a degradation in the nominal capacitance due to dc bias and c hanges in the capacitance due to temperature, etc. 12) thermal shutdown circuit (tsd) when junction temperatures become 175c (typ) or higher, the thermal shutdown circuit operates and turns a switch off. the thermal shutdown circuit, which is aimed at isolat ing the lsi from thermal runaway as much as possible, is not aimed at the protection or guarantee of the lsi. therefor e, do not continuously use the lsi with this circuit operating or use the lsi assuming its operation. 13) thermal design perform thermal design in which there ar e adequate margins by taking into account the permissible dissipation (pd) in actual states of use. 14) selection of coil select the low dcr inductors to decrease power loss for dc/dc converter.
technical note 15/15 BD6074GUT www.rohm.com 2011.12 - rev. a ? 2011 rohm co., ltd. all rights reserved. ordering part number b d 6 0 7 4 gu t - e 2 part no. part no. 6074 package gut : vcsp60n1 packaging and forming specification e2: embossed tape and reel (unit : mm) vcsp60n1 (bd6069gut) 1.68 0.05 1.68 0.05 1pin mark s 0.08 s 0.21 0.05 0.6 0.08 a b 3 p=0.5 2 8- 0.3 0.05 2 c 1 ( 0.15)index post p=0.5 2 b 0.34 0.05 a 0.34 0.05 0.05 a b ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs e2 () direction of feed reel 1pin (BD6074GUT)
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

▲Up To Search▲

Price & Availability of BD6074GUT

	To Download BD6074GUT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .