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uwe series wide input, isolated eighth-brick dc/dc converters for full details go to www.murata-ps.com/rohs www.murata-ps.com www.murata-ps.com email: sales@murata-ps.com contents page description, photograph, connection diagram 1 ordering guide, model numbering 2 mechanical speci? cations, input/output pinout 3 detailed electrical speci? cations 5 soldering guidelines, technical notes 9 performance data 14 shipping tray 23 16 dec 2010 mdc_uwe series.a26 page 1 of 23 features industry-standard through-hole eighth-brick package with 0.9" x 2.3" x 0.38" outline dimensions choice of two wide input ranges, 9-36 vdc or 18-75 vdc fixed output from 3.3 to 24 volts dc up to 75 watts synchronous recti? cation yields very high ef? ciency and low power dissipation operating temperature range from -40 to +85?c with derating up to 2250 volt dc isolation (q48 models) outstanding thermal performance and derating extensive self-protection, overtemperature and overload features with no output reverse conduction on/off control, trim and remote sense functions certi? ed to ul/en/iec 60950-1, can/csa-c22.2 no. 60950-1, 2nd edition, safety ap provals and en55022/cispr22 standards pre-bias operation for startup protection with dimensions of only 0.9 by 2.3 by 0.38 inches, the uwe series open frame dc/dc convert- ers deliver up to 75 watts in an industry-standard eighth-brick through-hole package. this format can plug directly into quarter-brick pinouts. several standard ? xed-output voltages from 3.3 vdc to 24 vdc assure compatibility in embedded equipment, cpu cards and instrument subsystems. the extend- ed 4-to-1 input power range (9-36v) is ideal for battery-powered, telecom or portable applications. very high ef? ciency means no fans or temperature deratings in many applications. an optional thermal mounting baseplate extends operation into most conceivable environments. the synchronous recti? er design uses the maximum available duty cycle for greatest ef- ? ciency and low power dissipation with no reverse output conduction. other features include low on-resistance fets, planar magnetics and heavy- copper pc boards. these deliver low output noise, tight line/load regulation, stable no-load operation and fast load step response. all units are precision assembled in a highly automated facility with iso- traceable manufacturing quality standards. isolation of 2250 volts (q48 models) assures safety and fully differential (? oating) operation for greatest application ? exibility. on-board sense in- puts compensate for line drop errors at high output currents. outputs are trimmable within 10% of nominal voltage. the uwe series are functionally complete. a wealth of protection features prevents damage to both the converter and outside circuits. inputs are protected from undervoltage and outputs fea- ture short circuit protection, overcurrent and excess temperature shut down. overloads automatically recover using the hiccup technique upon fault removal. the uwe is certi? ed to standard safety and emi/rfi approvals. all units meet rohs-6 hazardous materials compliance. product overview the uwe series "eighth-brick" dc/dc converters are high-current isolated power modules designed for use in high-density system boards. t typical unit simpli? ed block diagram +sense +v out ?v out ?sense trim Cv in +v in on/off control switch drive typical topology is shown. reference amplifier, trim and feedback voltage regulator ss uv, ot isolation pwm $
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com part number structure 16 dec 2010 mdc_uwe series.a26 page 2 of 23 specification summary and ordering guide root model output input ef? ciency package (case, pinout) v out (v) i out (a) power (w) r/n (mvp-p) ? regulation (max.) v in nom. (v) range (v) i in , no load (ma) i in , full load (a) min. typ. typ. max. line load uwe-3.3/20-q12 3.3 20 66 80 125 0.25% 0.25% 12 9-36 160 6.18 87% 89% c77, p32 uwe-3.3/20-q48 3.3 20 66 165 225 0.2% 0.25% 48 18-75 75 1.54 88% 89.5% uwe-5/15-q12 5.0 15 75 80 125 0.25% 0.125% 12 9-36 185 6.87 89% 91% uwe-5/15-q48 5.0 15 75 135 150 0.25% 0.075% 48 18-75 90 1.74 88.5% 90% uwe-12/6-q12 12.0 6 72 120 180 0.125% 0.05% 12 9-36 75 6.56 90% 91.5% uwe-12/6-q48 12.0 6 72 115 150 0.1% 0.075% 48 18-75 90 1.65 89% 91% uwe-15/5-q12 15.0 5 75 65 125 0.125% 0.075% 12 9-36 270 6.83 89.5% 91.5% uwe-15/5-q48 15.0 5 75 65 125 0.125% 0.075% 48 18-75 270 1.71 89.5% 91.5% uwe-24/3-q12 24.0 3 72 190 275 0.125% 0.125% 12 9-36 110 6.70 88.3% 89.5% please refer to the part number structure for additonal ordering model numbers and options. all speci? cations are at nominal line voltage, nominal output voltage and full load, +25 c. unless otherwise noted. see detailed speci? cations. output capacitors are 1 f ceramic in parallel with 10 f electrolytic. input cap is 100 f. all caps are low esr types. contact murata power solutions for details. i/o caps are necessary for our test equipment and may not be needed for your application. speci? cations are preliminary. please contact murata power solutions for availability. load regulation range: 0.1-3a. this is required only for our test equipment. the converter will operate at zero output current with degraded regulation. note: some model number combinations may not be available. contact murata power solutions for further information. maximum rated output current in amps eighth-brick package wide input range unipolar, single-output nominal output voltage u e - / q12 - 12 6 p b input voltage range q12 = 9-36 volts q48 = 18-75 volts c rohs hazardous materials compliance c=rohs-6, standard (does not claim eu rohs exemption 7bClead in solder) - w on/off control polarity p = positive polarity (standard for q12 models, optional for q48 models) n = negative polarity (standard for q48 models, optional special order for q12 models) baseplate (optional) blank = no baseplate (standard) b = baseplate installed (optional special order) lx blank = standard pin length 0.19 inches (4.8mm) l1 = pin length 0.110 inches (2.79mm)* l2 = pin length 0.145 inches (3.68mm)* * special quantity order is required. pin length option
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 3 of 23 mechanical specificationsno baseplate .062 pins 0.19 (4.8) @ .040 pins 0.19 (4.8) @ .071.002 standoff at each .040 pin 0.38 (9.7) max side view .040.002 at pins 1-3, 5-7 .062.002 at pins 4 & 8 top view 2.30 (58.4) 0.90 (22.9) bottom view pin 1 pin 2 pin 3 pin 4 pin 8 pin 7 pin 6 pin 5 2.000 (50.80) 0.15 (3.8) end view isometric view mounting plane i/o connections pin function 1- vin 2 on/off control * 3+vin 4- vout 5- sense 6trim 7+ sense 8 + vout * the remote on/off can be provided with either positive (p suffix) or negative connect each sense input to its respective vout if sense is not connected at a remote load. (n suffix) polarity material: .040 pins: c26000 brass, 3/4 hard .062 pins: c10200 copper alloy, full hard finish: (all pins) gold (5 microinches min) over nickel (50 microinches min) 0.45 (11.43) 0.600 (15.24) 0.300 (7.62) 0.150 (3.81) 0.150 (3.81) 0.600 (15.24) ref third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 2?
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 4 of 23 mechanical specifications (continued) baseplate installed .062 pins 0.19 (4.8) @ .040 pins 0.19 (4.8) @ .071.002 standoff at each .040 pin 0.48 (12.2 0.5) 0.45 (11.43) top view 0.14 (3.6) 2.30 (58.4) 0.90 (22.9) 1.500 (38.10) 0.40 (10.2) 0.625 (15.88) m2x0.4 - 6h .15" max screw penetration 4x thru side view aluminum baseplate .040.002 at pins 1-3, 5-7 .062.002 at pins 4 & 8 isometric view end view bottom view pin 1 pin 2 pin 3 pin 4 pin 8 pin 7 pin 6 pin 5 0.600 (15.24) 0.300 (7.62) 0.150 (3.81) 0.150 (3.81) 2.000 (50.80) 0.600 (15.24) ref 0.15 (3.8) material: .040 pins: c26000 brass, 3/4 hard .062 pins: c10200 copper alloy, full hard finish: (all pins) gold (5 microinches min) over nickel (50 microinches min) mounting plane third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 2?
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 5 of 23 detail specifications, q12 models uwe-3.3/20-q12 uwe-5/15-q12 uwe-12/6-q12 uwe-15/5-q12 uwe-24/3-q12 specs are typical unless noted. input input voltage range see ordering guide start-up threshold, volts 9.5 9 undervoltage shutdown, v. 8.5 8 8 8.2 8 overvoltage shutdown, v. none re? ected (back) ripple current, ma pk-pk 25 10 40 1 40 suggested external fast blow fuse, a 25 20 20 20 20 input current full load conditions see ordering guide inrush transient, a 2 sec 0.1 a 2 sec input current if output is in short circuit, ma 250 200 250 250 250 no load, ma 160 185 200 270 110 low line (vin=min.), amps 8.33 9.42 8.89 9.36 9.04 standby mode, ma 85555 (off, uv, ot shutdown) internal input ? lter type l-c reverse polarity protection none, install external fuse remote on/off control positive logic ("p" model suf? x) off=ground pin to +0.8v max. on=open pin or +3.5 to +15v max. negative logic ("n" model suf? x) off=open pin or +5v to +15v max. on=ground pin or 0 to +0.8v max. current, ma 1 output voltage output range see ordering guide voltage output accuracy 1% of vnom., (50% load) adjustment range -10 to +10% of vnom. temperature coef? cient 0.02% of vout range per c minimum loading no minimum load remote sense compensation +10% max. ripple/noise (20 mhz bandwidth) see ordering guide line/load regulation see ordering guide ef? ciency see ordering guide maximum capacitive loading, f low esr <0.02 max., resistive load 10,000 10,000 4,700 4700 1500 isolation voltage input to output, volts min. dc 1500 input to baseplate, volts min. dc 1500 baseplate to output, volts min. dc 750 isolation resistance, m 100 isolation capacitance, pf 1500 1000 1000 1000 1000 isolation safety rating basic insulation current limit inception (98% of vout, after warmup), amps 27 22.5 8.5 7.25 4.0 short circuit protection method current limiting, hiccup autorestart. remove overload for recovery. short circuit current, amps 0.5 1.0 1.5 1.5 1.0 short circuit duration continuous, output shorted to ground. no damage. overvoltage protection, volts (via magnetic feedback) 4.5 6 151829 18
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 6 of 23 detail specifications, q12 models, continued dynamic characteristics uwe-3.3/20-q12 uwe-5/15-q12 uwe-12/6-q12 uwe-15/5-q12 uwe-24/3-q12 dynamic load response, sec (50-75-50% load step) to 1% of ? nal value 50 start-up time vin to vout regulated, msec 20 20 40 30 40 remote on/off to vout regulated, msec 5 15302530 switching frequency, khz 245 25 215-250 275 25 275 25 215 15 environmental operating temperature range, no baseplate with derating, c (see derating curves) -40 to +85 with derating storage temperature range, c -55 to +125 maximum baseplate operating temperature, c +100 thermal protection/shutdown, c +120 relative humidity to +85c/85% non-condensing physical outline dimensions see mechanical specs pin material copper alloy pin finish nickel underplate with gold overplate (see mechanical specs for details) pin diameter, inches 0.04/0.062 pin diameter, mm 1.016/1.575 weight, ounces 0.7 weight, grams 20 electromagnetic interference (conducted) meets en55022 and cispr22 class b with external ? lter. safety meets ul/cul 60950-1, csa-c22.2 no.60950-1, iec/en 60950-1 detail specifications, q48 models uwe-3.3/20-q48 uwe-5/15-q48 uwe-12/6-q48 uwe-15/5-q48 specs are typical unless noted. input input voltage range see ordering guide start-up threshold, volts 17.5 17.5 17.5 17.5 undervoltage shutdown, v. 16.5 16.0 16.0 16.0 overvoltage shutdown, v. none re? ected (back) ripple current, ma pk-pk 30 30 40 40 suggested external fast blow fuse, a 8 101020 input current full load conditions inrush transient, a 2 sec 0.1 a 2 sec 0.1 a 2 sec 0.1 a 2 sec 0.1 a 2 sec input current if output is in short circuit, ma 150 250 100 250 no load, ma 75 90 90 270 low line (vin=min.), amps 4.1 4.6 4.35 4.68 standby mode, ma 4545 (off, uv, ot shutdown) internal input ? lter type pi-type l-c pi-type l-c reverse polarity protection none, install external fuse remote on/off control positive logic ("p" model suf? x) off = ground pin to +0.8v max. on = open pin or +3.5v to +15v max. negative logic ("n" model suf? x) off = open pin or +5v to +15v max. on = ground pin to +1v max. current, ma 1
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 7 of 23 detail specifications, q48 models, continued output uwe-3.3/20-q48 uwe-5/15-q48 uwe-12/6-q48 uwe-15/5-q48 voltage output range see ordering guide voltage output accuracy 1% of vnom., (50% load) adjustment range -10 to +10% of vnom. temperature coef? cient 0.02% of vout range per c minimum loading no minimum load remote sense compensation +10% max. ripple/noise (20 mhz bandwidth) see ordering guide line/load regulation see ordering guide ef? ciency see ordering guide maximum capacitive loading, f low esr <0.02 max., resistive load 4,700 10,000 4,700 3300 isolation voltage input to output, volts min. dc 2250 input to baseplate, volts min. dc 1500 baseplate to output, volts min. dc 750 isolation resistance, m 100 isolation capacitance, pf 1000 1500 1000 1000 isolation safety rating basic insulation current limit inception (98% of vout, after warmup), amps 26.5 21.0 8.0 7.25 short circuit protection method current limiting, hiccup autorestart. remove overload for recovery. short circuit current, amps 5.0 1.5 1.0 1.5 short circuit duration continuous, output shorted to ground. no damage. overvoltage protection, volts (via magnetic feedback) 4 6.5 15 18 dynamic characteristics dynamic load response, sec (50-75-50% load step) to ? nal value 50 (to 2%) 50 (to 2%) 50 (to 1%) 50 (to 1%) start-up time vin to vout regulated, msec 20 20 30 30 remote on/off to vout regulated, msec 10 20 20 25 switching frequency, khz 21520 24020 22020 22525 environmental operating temperature range, no baseplate with derating, c (see derating curves) -40 to +85 with derating storage temperature range, c -55 to +125 maximum baseplate operating temperature, c +100 +105 +100 +105 thermal protection/shutdown, c +120 +120 +120 +120 relative humidity to +85c/85% non-condensing physical outline dimensions see mechanical specs pin material copper alloy pin finish nickel underplate with gold overplate (see mechanical specs for details) pin diameter, inches 0.04/0.062 pin diameter, mm 1.016/1.575 weight, ounces 0.7 weight, grams 20 electromagnetic interference (conducted) meets en55022 and cispr22 class b with external ? lter. safety certi? ed to ul/cul 60950-1, csa-c22.2 no.60950-1, iec/en 60950-1, 2nd edition
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 8 of 23 caution: this product is not internally fused. to comply with safety agency cer- ti? cations and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals. see fuse information. 1 all q12 models are tested and speci? ed with external 1f and 10f paralleled ceramic/tantalum output capacitors and a 100f external input capacitor. q48 models test with a 35f input cap. all capacitors are low esr types. contact murata power solutions for details. these capacitors are necessary to accommodate our test equipment and may not be required to achieve speci? ed performance in your applications. however, murata power solutions recommends using these capacitors in your application. all models are stable and regulate within spec under no-load conditions. all speci? cations are typical unless noted. general conditions for speci? cations are +25 c, vin=nominal, vout=nominal, full load. adequate air? ow must be supplied for extended testing under power. 2 input ripple current is tested and speci? ed over a 5 hz to 20 mhz bandwidth. input ? ltering is cin=33 f, cbus=220 f, lbus=12 h. 3 note that maximum power derating curves indicate an average current at nominal input voltage. at higher temperatures and/or lower air? ow, the dc/dc converter will tolerate brief full current outputs if the total rms current over time does not exceed the derating curve. all derating curves are presented at sea level altitude. be aware that power dissipation degrades as altitude increases. 4a mean time before failure is calculated using the telcordia (belcore) sr-332 method 1, case 3, issue 2, ground ? xed controlled conditions, tambient=+25c, full output load, natural air convection. 4b mean time before failure is calculated using mil-hdbk-217f, gb ground benign, tambient=+25c, full output load, natural air convection. 5 the remote on/off control is normally controlled by a switch or open collector or open drain transistor. but it may also be driven with external logic or by applying appropriate external voltages which are referenced to input common. 6 short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. 7 the outputs are not intended to sink appreciable reverse current. 8 output noise may be further reduced by adding an external ? lter. see i/o filtering and noise reduction. larger caps (especially low-esr ceramic capacitors) may slow transient response or degrade stability. use only as much output ? ltering as needed to achieve your noise requirements and no more. thoroughly test your system under full load with all components installed. 9 all models are fully operational and meet published speci? cations, including cold start at C40 c. at full power, the package temperature of all on-board components must not exceed +128 c. 10 regulation speci? cations describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. 11 if the user adjusts the output voltage, accuracy is dependent on user-supplied trim resistors. to achieve high accuracy, use 1% or better tolerance metal-? lm resistors. if no trim is installed, the converter will achieve its rated accuracy. do not exceed maximum power speci? cations when adjusting the output trim. 12 output current limit and short circuit protection is non-latching. when the overcur- rent fault is removed, the converter will immediately recover. 13 alternate pin length and/or other output voltages may be available under special quantity order. 14 at zero output current, the output may contain low frequency components which exceed the ripple speci? cation. the output may be operated inde? nitely with no load. 15 input fusing: if the input voltage is reversed, a body diode will conduct consider- able current. therefore, install an external protection fuse. to ensure reverse input protection with full output load, always connect an external input fast-blow fuse in series with the +vin input. use approximately twice the full input current rating at the selected input voltage. 16 hiccup overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. if the overcurrent condition still exists, the restart current will be removed and then tried again. this short current pulse prevents overheating and damaging the converter. once the fault is removed, the converter immediately recovers normal operation. 17 note that the converter will operate up to the rated baseplate maximum tempera- ture with the baseplate installed and properly heat sunk. to avoid thermal self- protection shutdown, do not exceed this maximum baseplate temperature. 18 uwe-24/3-q12 undervoltage shutdown of 8.0v is at half load. 19 uwe-24/3-q12 output overvoltage protection requires 0.3a minimum load. 20 pre-bias operation: startup will succeed if the output setpoint voltage is higher than the pre-existing external output voltage. specification notes calculated mtbf (telcordia sr-332 method, see note 4a) model hours uwe-3.3/20-q12 1,248,001 uwe-5/15-q12 1,847,009 uwe-5/15-q48 2,273,212 uwe-12/6-q12 3,755,203 calculated mtbf (mil-hdbk-217n2 method, see note 4b) uwe-3.3/20-q12 1,089,141 uwe-5/15-q12 1,936,627 uwe-5/15-q48 1,657,518 uwe-12/6-q12 1,239,521
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com technical notes input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exist. for mps uwe dc/dc converters, you should use fast-blow type fuses, installed in the ungrounded input supply line. refer to the speci? cations for fuse values. all relevant national and international safety standards and regulations must be observed by the installer. for system safety agency approvals, the convert- ers must be installed in compliance with the requirements of the end-use safety standard, e.g., iec/en/ul60950-1. input undervoltage shutdown and start-up threshold under normal start-up conditions, devices will not begin to regulate until the ramping-up input voltage exceeds the start-up threshold voltage. once operating, devices will not turn off until the input voltage drops below the undervoltage shutdown limit. subsequent re-start will not occur until the input is brought back up to the start-up threshold. this built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. start-up time the v in to v out start-up time is the interval of time between the point at which the ramping input voltage crosses the start-up threshold and the fully loaded output voltage enters and remains within its speci? ed accuracy band. actual measured times will vary with input source impedance, external input/output capacitance, and load. the uwe series implements a soft start circuit that limits the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off control to v out start-up time assumes the converter has its nominal input voltage applied but is turned off via the on/off control pin. the speci? cation de? nes the interval between the point at which the converter is turned on and the fully loaded output voltage enters and remains within its speci? ed accuracy band. similar to the v in to v out start-up, the on/off control to v out start-up time is also governed by the internal soft start circuitry and external load capacitance. the difference in start up time from v in to v out and from on/off control to v out is therefore insigni? cant. input source impedance uwe converters must be driven from a low ac-impedance input source. the dc/dcs performance and stability can be compromised by the use of highly inductive source impedances. for optimum performance, compo- nents should be mounted close to the dc/dc converter. if the application has a high source impedance, low v in models can benefit from increased external input capacitance. i/o filtering, input ripple current, and output noise all models in the uwe converters are tested/speci? ed for input re? ected ripple current and output noise using the speci? ed external input/output components/ circuits and layout as shown in the following two ? gures. external input capacitors (c in in figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient ir drops in conductors from backplane to the dc/dc. input caps should be selected for bulk capacitance (at appropriate frequencies), low esr, and high rms-ripple-current ratings. the switching nature of dc/dc converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system stability. in figure 2, c bus and l bus simulate a typical dc voltage bus. your speci? c system con? guration may necessitate additional considerations. input voltage q12 models - volts, max. continuous volts, transient, 100 msec q48 models - volts, max. continuous volts, transient, 100 msec 0-36 vdc 0-50 vdc 0-75 vdc 0-100 vdc on/off control -0.7 v. min to +15v max. input reverse polarity protection see fuse section. output overvoltage vout nom. +20% max. output current (note 7) current-limited. devices can withstand sustained short circuit without damage. overtemperature protection device includes electronic over- temperature shutdown protection under normal operation. storage temperature -55 to +125 c. lead temperature see soldering speci? cations absolute maximums are stress ratings. exposure of devices to greater than any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied or recommended. absolute maximum ratings c in v in c bus l bus c in = 33f, esr < 700m @ 100khz c bus = 220f, esr < 100m @ 100khz l bus = 12h +input Cinput current probe to oscilloscope + C figure 2. measuring input ripple current soldering guidelines murata power solutions recommends the speci? cations below when installing these converters. these speci? cations vary depending on the solder type. exceeding these speci? cations may cause damage to the product. your production environment may dif- fer; therefore please thoroughly review these guidelines with your process engineers. wave solder operations for through-hole mounted products (thmt) for sn/ag/cu based solders: maximum preheat temperature 115 c. maximum pot temperature 270 c. maximum solder dwell time 7 seconds for sn/pb based solders: maximum preheat temperature 105 c. maximum pot temperature 250 c. maximum solder dwell time 6 seconds 16 dec 2010 mdc_uwe series.a26 page 9 of 23
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com in critical applications, output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below speci? ed limits using ? lter- ing techniques, the simplest of which is the installation of additional external output capacitors. these output caps function as true ? lter elements and should be selected for bulk capacitance, low esr and appropriate frequency response. all external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. temperature variations for all relevant parameters should also be taken carefully into consideration. the most effective combination of external i/o capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. in figure 3, the two copper strips simulate real-world pcb impedances between the power supply and its load. in order to minimize measurement errors, scope measurements should be made using bnc connectors, or the probe ground should be less than ? inch and soldered directly to the ? xture. thermal shutdown these uwe converters are equipped with thermal-shutdown circuitry. if envi- ronmental conditions cause the internal temperature of the dc/dc converter to rise above the designed operating temperature, a precision temperature sensor will power down the unit. when the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. see performance/ functional speci? cations. output overvoltage protection uwe output voltages are monitored for an overvoltage condition via magnetic feedback. the signal is coupled to the primary side and if the output voltage rises to a level which could be damaging to the load, the sensing circuitry will power down the pwm controller causing the output voltages to decrease. fol- lowing a time-out period the pwm will restart, causing the output voltages to ramp to their appropriate values. if the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. this on/off cycling is referred to as "hiccup" mode. current limiting as soon as the output current increases to substantially above its rated value, the dc/dc converter will go into a current-limiting mode. in this condition, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. this is commonly referred to as power limiting. current limit inception is de? ned as the point at which the full-power output voltage falls below the speci? ed tolerance. see performance/functional speci? cations. if the load current, being drawn from the converter, is signi? cant enough, the unit will go into a short circuit condition as speci? ed under "performance." short circuit condition when a converter is in current-limit mode, the output voltage will drop as the output current demand increases. if the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the pwm controller. following a time-out period, the pwm will restart causing the output voltages to begin ramping to their appropriate values. if the short-circuit condition persists, another shutdown cycle will be initiated. this on/off cycling is referred to as "hiccup" mode. the hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. the uwe is capable of enduring an inde? nite short circuit output condition. features and options on/off control the input-side, remote on/off control function can be ordered to operate with either polarity: floating outputs since these are isolated dc/dc converters, their outputs are "? oating" with respect to their input. designers will normally use the Coutput as the ground/ return of the load circuit. you can, however, use the +output as ground/return to effectively reverse the output polarity. minimum output loading requirements uwe converters employ a synchronous-recti? er design topology and all models regulate within spec and are stable under no-load to full load conditions. operation under no-load conditions however might slightly increase the output ripple and noise. c1 c1 = 0.47f ceramic c2 = na load 2-3 inches (51-76mm) from module c2 r load copper strip copper strip scope +output Coutput +sense Csense figure 3. measuring output ripple/noise (pard) 16 dec 2010 mdc_uwe series.a26 page 10 of 23
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com positive-polarity models (p" part-number suf? x) are enabled when the on/off control is left open or is pulled high, as per figure 4. positive-polarity devices are disabled when the on/off control is pulled low. negative-polarity devices (n suf? x) are off when the on/off control is open (or pulled high), and on when the on/off control is pulled low with respect to Cv in as shown in figure 5. dynamic control of the remote on/off function is facilitated with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropri- ate). the drive circuit should be able to sink appropriate current (see performance specs) when activated and withstand appropriate voltage when deactivated. applying an external voltage to the on/off control when no input power is applied to the converter can cause permanent damage to the converter. trimming output voltage uwe converters have a trim capability that allows users to adjust the output voltages. adjustments to the output voltages can be accomplished via a trim pot (figure 6) or a single ? xed resistor as shown in figures 7 and 8. a single ? xed resistor can increase or decrease the output voltage depending on its connec- tion. the resistor should be located close to the converter and have a tcr less than 100ppm/c to minimize sensitivity to changes in temperature. if the trim function is not used, leave the trim pin ? oating. a single resistor connected from the trim to the +output, or +sense where applicable, will increase the output voltage in this con? guration. a resistor con- nected from the trim to the Coutput, or Csense where applicable, will decrease the output voltage in this con? guration. trim adjustments greater than the speci? ed range can have an adverse affect on the converter's performance and are not recommended. excessive voltage differences between v out and sense, in conjunction with trim adjust- ment of the output voltage, can cause the overvoltage protection circuitry to activate (see performance speci? cations for overvoltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter's speci? ed rating or cause output voltages to climb into the output overvoltage region. therefore: (v out at pins) x (i out ) <= rated output power on/off control control + vcc -input figure 4. driving the positive polarity on/off control pin Ci n p u t o n /o f f c o n tr o l + vcc figure 5. driving the negative polarity on/off control pin load r2 +output Cinput +input on/off control trim +sense Coutput Csense figure 8. trim connections to decrease output voltages 20k 5-20 turns load +output Cinput +input on/off control trim +sense Coutput Csense figure 6. trim connections using a trimpot load r1 +output Cinput +input on/off control trim +sense Coutput Csense figure 7. trim connections to increase output voltages using a fixed resistor 16 dec 2010 mdc_uwe series.a26 page 11 of 23
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com note: resistor values are in k . adjustment accuracy is subject to resistor tolerances and factory-adjusted output accuracy. v o = desired output voltage. on/off enable control ground bounce protection to improve reliability, if you use a small signal transistor or other external circuit to select the remote on/off control, make sure to return the lo side directly to the Cvin power input on the dc/dc converter. to avoid ground bounce errors, do not connect the on/off return to a distant ground plane or current-carrying bus. if necessary, run a separate small return wire directly to the Cvin terminal. there is very little current (typically 1-5 ma) on the on/off control however, large current changes on a return ground plane or ground bus can accidentally trigger the converter on or off. if possible, mount the on/off transistor or other control circuit adjacent to the converter. remote sense note: the sense and v out lines are internally connected through low value resistors. nevertheless, if the sense function is not used for remote regulation the user should connect the +sense to +v out and Csense to Cv out at the dc/dc converter pins. uwe series converters have a sense feature to provide point of use regula- tion, thereby overcoming moderate ir drops in pcb conductors or cabling. the remote sense lines carry very little current and therefore require minimal cross-sectional-area conductors. the sense lines are used by the feedback control-loop to regulate the output. as such, they are not low impedance points and must be treated with care in layouts and cabling. sense lines on a pcb should be run adjacent to dc signals, preferably ground. in cables and discrete wiring applications, twisted pair or other techniques should be implemented. uwe series converters will compensate for drops between the output volt- age at the dc/dc and the sense voltage at the dc/dc provided that: [v out (+) Cv out (C)] C[sense(+) Csense (C)] 5% v out output overvoltage protection is monitored at the output voltage pin, not the sense pin. therefore, excessive voltage differences between v out and sense in conjunction with trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see performance speci? cations for overvoltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense functions can cause output voltages to increase thereby increasing output power beyond the uwes speci? ed rating or cause output voltages to climb into the output over- voltage region. also, the use of trim up and sense combined may not exceed +10% of v out . therefore, the designer must ensure: (v out at pins) x (i out ) rated output power up v o C 3.3 r t (k ) = C 10.2 13.3(v o C 1.226) 3.3 C v o r t (k ) = C 10.2 16.31 down 3.3 volt output up v o C 5 r t (k ) = C 10.2 20.4(v o C 1.226) 5 C v o r t (k ) = C 10.2 25.01 down 5 volt output up v o C 12 r t (k ) = C 10.2 49.6(v o C 1.226) up v o C 15 r t (k ) = C 10.2 62.9(v o C 1.226) 12 C v o r t (k ) = C 10.2 60.45 down 15 C v o r t (k ) = C 10.2 76.56 down 12 volt output 15 volt output up v o C 24 r t (k ) = C 10.2 101(v o C 1.226) 24 C v o r t (k ) = C 10.2 124.2 down 24 volt output trim equations trim up trim down load +output Cinput sense current contact and pcb resistance losses due to ir drops contact and pcb resistance losses due to ir drops sense return +input on/off control trim +sense Coutput Csense i out return i out figure 10. remote sense circuit con? guration figure 9. on/off enable control ground bounce protection preferred location of on/off control adjacent to -vin terminal dc/dc converter install separate return wire for on/off control with remote transistor on/off control transistor do not connect control transistor through remote power bus ground plane or power return bus + vin on/off enable -vin return 16 dec 2010 mdc_uwe series.a26 page 12 of 23
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com ,6?`i?
>?i> ,/>???>i? ???v>???`? 6>?>l?i ??ii`v>? i>??} i?i?i? ?l?i? i??i>?i ?i??? ?v?? v?????>? *iv????? ???>i >?i???ii ??li??11/ 1????`i i?-11/? vertical wind tunnel murata power solutions employs a custom-designed enclosed vertical wind tunnel, infrared video camera system and test instrumentation for accurate air? ow and heat dissipation analysis of power products. the system includes a precision low ? ow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges and adjustable heating element. the ir camera can watch thermal characteristics of the unit under test (uut) with both dynamic loads and static steady- state conditions. a special optical port is used which is transpar- ent to infrared wavelengths. the computer ? les from the ir camera can be studied for later analysis. both through-hole and surface mount converters are soldered down to a host carrier board for realistic heat absorption and spreading. both longitudinal and transverse air? ow studies are possible by rotation of this carrier board since there are often signi? cant differences in the heat dissipation in the two air? ow directions. the combination of both adjustable air? ow, adjustable ambient heat and adjustable input/output currents and voltages mean that a very wide range of measurement conditions can be studied. the air? ow collimator mixes the heat from the heating ele- ment to make uniform temperature distribution. the collimator also reduces the amount of turbulence adjacent to the uut by restoring laminar air? ow. such turbulence can change the effec- tive heat transfer characteristics and give false readings. excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. both sides of the uut are studied since there are different thermal gradi- ents on each side. the adjustable heating element and fan, built-in tempera- ture gauges and no-contact ir camera mean that power supplies are tested in real-world conditions. figure 11. vertical wind tunnel 16 dec 2010 mdc_uwe series.a26 page 13 of 23
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 14 of 23 performance data maximum current temperature derating @ sea level (v in = 12v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 12v, transverse air? ow, with baseplate) uwe-3.3/20-q12n uwe-3.3/20-q12n uwe-3.3/20-q12n 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 13 14 15 16 17 18 19 20 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 13 14 15 16 17 18 19 20 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm ef? ciency vs. line voltage and load current @ 25 c 2 4 6 8 10 12 14 16 18 20 72 74 76 78 80 82 84 86 88 90 92 vin = 30 v vin = 24 v vin = 36 v vin = 12 v vin = 9 v load current (amps) ef?ciency (%) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 11 12 13 14 15 16 17 18 19 20 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 15 of 23 performance data uwe-3.3/20-q48p uwe-3.3/20-q48p uwe-3.3/20-q48p maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) 15 16 17 18 19 20 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm maximum current temperature derating @sea level (v in = 48v, transverse air? ow, with baseplate) 12 13 14 15 16 17 18 19 20 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm ef? ciency vs. line voltage and load current @ 25 c 50 54 58 62 66 70 74 78 82 86 90 94 2 4 6 8 10 12 14 16 18 20 vin = 60 v vin = 48 v vin = 75 v vin = 36 v vin = 24 v vin = 18 v load current (amps) ef?ciency (%) maximum current temperature derating @ sea level (v in = 24v, transverse air? ow, no baseplate) 15 16 17 18 19 20 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm maximum current temperature derating @ sea level (v in = 48v, transverse air? ow, no baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 14 15 16 17 18 19 20 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 16 of 23 performance data maximum current temperature derating @ sea level (v in = 12v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 12v, transverse air? ow, with baseplate) uwe-5/15-q12n uwe-5/15-q12n 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 10 11 12 13 14 15 16 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm ef? ciency vs. line voltage and load current @ 25 c 123456789101112131415 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 vin = 24 v vin = 12 v vin = 36 v vin = 9 v load current (amps) ef?ciency (%)
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 17 of 23 performance data uwe-5/15-q48p uwe-5/15-q48n uwe-5/15-q48n maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 12 12.5 13 13.5 14 14.5 15 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm maximum current temperature derating @sea level (v in = 48v, transverse air? ow, with baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 12 12.5 13 13.5 14 14.5 15 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm ef? ciency vs. line voltage and load current @ 25 c 123456789101112131415 60 65 70 75 80 85 90 vin = 60 v vin = 48 v vin = 75 v vin = 36 v vin = 24 v vin = 18 v load current (amps) ef?ciency (%) maximum current temperature derating @ sea level (v in = 24v, transverse air? ow, no baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 11 11.5 12 12.5 13 13.5 14 14.5 15 output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm maximum current temperature derating @ sea level (v in = 48v, transverse air? ow, no baseplate) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 9 10 11 12 13 14 15 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 18 of 23 performance data maximum current temperature derating @ sea level (v in = 12v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 12v, transverse air? ow, with baseplate) ef? ciency vs. line voltage and load current @ 25 c power dissipation vs. load current @ 25 c uwe-12/6-q12n uwe-12/6-q12n 1 2 3 4 5 6 6 8 7 0 7 2 7 4 7 6 7 8 8 0 8 2 8 4 8 6 8 8 9 0 9 2 9 4 l o a d c u r r e n t (amps) t e f ? f f c i e n c y ( % ) vi 24 v 2 vin = 24 v vi n = 30 v 0 vi n = 1 0 v vin 12 v vin = 12 v vin 36 v 3 vin = 36 v vi 9 v 9 vi n = 9 v l o a d c u r r e n t (amps) t loss (watts ) 1 2 3 4 5 6 7 8 9 1 0 1 2 3 4 5 6 vi 24 v vi n = 24 v v in = 30 v 0 v in = 1 0 v vin 12 v vin = 12 v vin 36 v vin = 36 v vi 9 v vi n = 9 v 4.0 4.5 5.0 5.5 6.0 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 4.0 4.5 5.0 5.5 6.0 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300+ lfm uwe-12/6-q48p ef? ciency vs. line voltage and load current @ 25 c 123456 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 vin = 48 v vin = 60 v vin = 24 v vin = 36 v vin = 75 v vin = 18 v load current (amps) ef?ciency (%)
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 19 of 23 performance data maximum current temperature derating @ sea level (v in = 24v, transverse air? ow, no baseplate) maximum current temperature derating @ sea level (v in = 48v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) maximum current temperature derating @sea level (v in = 48v, transverse air? ow, with baseplate) uwe-12/6-q48p uwe-12/6-q48p 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 4.0 4.5 5.0 5.5 6.0 6.5 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 4.0 4.5 5.0 5.5 6.0 6.5 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 3 3.5 4 4.5 5 5.5 6 6.5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 4 4.5 5 5.5 6 6.5 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm uwe-15/5-q12p ef? ciency vs. line voltage and load current @ 25 c 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 vin = 24 v vin = 12 v vin = 36 v vin = 9 v load current (amps) ef?ciency (%)
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 20 of 23 performance data maximum current temperature derating @ sea level (v in = 12v, transverse air? ow, no baseplate) maximum current temperature derating @ sea level (v in = 24v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 12v, transverse air? ow, with baseplate) maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) uwe-15/5-q12n uwe-15/5-q12n 3 3.5 4 4.5 5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 3 3.5 4 4.5 5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 3 3.5 4 4.5 5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 3 3.5 4 4.5 5 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm uwe-15/5-q48 ef? ciency vs. line voltage and load current @ 25 c 12345 68 70 72 74 76 78 80 82 84 86 88 90 92 94 load current (amps) ef?ciency (%) vin = 18v vin = 24v vin = 36v vin = 48v vin = 60v vin = 75v
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 16 dec 2010 mdc_uwe series.a26 page 21 of 23 performance data power dissipation vs. load current @ 25 c maximum current temperature derating @ sea level (v in = 60v, transverse air? ow, with baseplate) maximum current temperature derating @ sea level (v in = 48v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 24v and 48v, transverse air? ow, with baseplate) maximum current temperature derating @sea level (v in = 24v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 60v, transverse air? ow, no baseplate) uwe-15/5-q48 uwe-15/5-q48 uwe-15/5-q48 2 3 4 5 6 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature (c) output current (amps) ambient temperature (c) output current (amps) 65 lfm 100 lfm 200 to 400 lfm 2 3 4 5 6 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature (c) output current (amps) ambient temperature (c) output current (amps) 65 lfm 100 lfm 200 lfm 300 to 400 lfm 2 3 4 5 6 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( c) output current (amps) 65 to 400 lfm 2 3 4 5 6 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature (c) output current (amps) ambient temperature (c) output current (amps) 65 lfm 100 lfm 200 to 400 lfm 2 3 4 5 6 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature (c) output current (amps) ambient temperature (c) output current (amps) 65 lfm 100 lfm 200 lfm 300 to 400 lfm 1 2 3 4 5 6 7 8 9 10 11 12345 load current (amps) loss (watts) vin = 18v vin = 24v vin = 36v vin = 48v vin = 60v vin = 75v
uwe series wide input, isolated eighth-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com performance data 16 dec 2010 mdc_uwe series.a26 page 22 of 23 maximum current temperature derating @ sea level (v in = 12v, transverse air? ow, no baseplate) maximum current temperature derating @ sea level (v in = 24v, transverse air? ow, no baseplate) maximum current temperature derating @sea level (v in = 12v, transverse air? ow, with baseplate) maximum current temperature derating @sea level (v in = 24v, transverse air? ow, with baseplate) ef? ciency vs. line voltage and load current @ 25 c power dissipation vs. load current @ 25 c uwe-24/3-q12p uwe-24/3-q12p uwe-24/3-q12n l o a d c u r r e n t (amps) t e f ? f f c i e n c y ( % ) 6 5 6 7 6 9 7 1 7 3 7 5 7 7 7 9 8 1 8 3 8 5 8 7 8 9 9 1 9 3 9 5 0 . 5 1 1 . 5 2 2 . 5 3 vi 24 v vi n = 24 v vi n = 30 v 0 vi n = 1 0 v vin 12 v n vin = 12 v vin 36 v n vin = 36 v vi 9 v vi n = 9 v 2 3 4 5 6 7 8 9 1 0 1 1 1 2 0 . 5 1 1 . 5 2 2 . 5 3 l o a d c u r r e n t (amps) t l oss (w atts ) vi 24 v vin = 24 v vi n = 30 v 0 vi n = 1 0 v vin 12 v vin = 12 v vin 36 v vin = 36 v vi 9 v vi n = 9 v 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 2 2.2 2.4 2.6 2.8 3 3.2 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 1.8 2.2 2.4 2.6 2.8 3.2 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm 2.40 2.60 2.80 3.00 3.20 40 45 50 55 60 65 70 75 80 85 90 ambient temperature (c) output current (amps) natural convection 100 lfm 200 lfm 300 lfm 400 lfm
uwe series wide input, isolated eighth-brick dc/dc converters murata power solutions, inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to cha nge without notice. ? 2009 murata power solutions, inc. www.murata-ps.com/locations email: sales@murata-ps.com murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered shipping tray uwe modules are supplied in a 21-piece (3-by-7) shipping tray. the tray is an anti-static closed-cell polyethylene foam. dimens ions are shown below. 16 dec 2010 mdc_uwe series.a26 page 23 of 23 7.800 (198.1) 1.06 (26.9) 2.400 (61) typ 9.920 (252) 0.625 (15.9) typ -0.062 +0.000 1.300 (33.0) typ 0.25 chamfer typ (4-pl) dimensions in inches (mm) 0.25 r typ 9.920 (252) +0.000 -0.062 0.735 (18.7) 0.455 (11.6) typ 0.910 (23.1) typ

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