View UCQ-1240-D24PB-C_3866790.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters mdc_ucq models.b02 page of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com preliminary for applications requiring improved electrical and thermal performance at reduced cost, consider datels new ucq series quarter brick dc/dc power converters. these compact units measure just .45" x 2.3" x 0.4" (36.8 x 60.9 x 0.2 mm) and ft the industry-standard footprint. available outputs range between .2v @ 40 amps to 5v @ 6.7 amps and accept a wide input range. the ucqs interleaved, synchronous-rectifer topology offers high effciency (up to 93%), tight line and load regulation, low noise and fast step response. a single-board optimized open-frame design contributes to impressive thermal opera - tion. ucqs will operate up to +70c and 00 lfm airfow with no derating. the ucqs feature full isolation to 2250vdc meeting basic insulation requirements of ul/en/iec 60950- . input flters reduce propa - gated switching noise back to input sources. also included is a remote on/off switch control (with positive or negative polarity), output trim adjustable over nominal and output sense functions to reduce power lead losses. extensive protection items avoid damage from out of limit voltages, currents and temperatures. protection faults automatically recover using the hiccup technique. besides safety testing to 60950- , certifcations for the ucq include application for emc compliance (to fcc class b), qualifcation testing (including halt) and ce marking. features n standard quarter-brick package/pinout n low cost; low profle, 0.4" ( 0.2mm) n 24v or 48v nominal input n outputs: .2v to 5v n interleaved synchronous-rectifer topology ? ultra high effciency ? no output reverse conduction n outstanding thermal performance n on/off control, trim & sense functions n fully isolated, 2250vdc (basic) n output overvoltage protection n fully i/o protected; thermal shutdown n ul/en/iec60950- safety approvals n qual/halt/emi tested product overview typical topology may vary between units. typical units ?v in (1 ) +v in (3 ) opt o isola tion pwm contr oller reference & err or amp input under vo lta ge, input o ver vo lta ge, and output o ver vo lta ge comp ara t ors * can be ordered with positiv e (standard) or negativ e (optional) polar ity . remo te on/off contr ol* (2 ) +sense (7 ) ?sense (5 ) +v ou t (8 ) v ou t tri m (6 ) ?v ou t (4 ) switch contr ol figure 1. simplifed schematic $ f or full details go to ww w .murata-ps.com/rohs
mdc_ucq models.b02 page 2 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ? these are partial model numbers. please refer to the part number structure for complete ordering part numbers. ? all specifcations are at nominal line voltage and full load, +25 deg.c unless otherwise noted. see detailed specifcations. output capacitors are f ceramic || 0 f electrolytic. i/o caps are necessary for our test equipment and may not be needed for your application. outline dimensions: 2.3 .45 0.39 inches 58.4 36.8 9.9 mm pinout: p32 (all models) performance specifcations and ordering guide ? ordering guide root models ? output input effciency v out (volts) i out (amps) power (watts) r/n (mvp-p) regulation (max.) ? v in nom. (volts) range (volts) i in no load (ma) i in full load (amps) typ. max. line load min. typ. ucq-1.2/40-d24 .2 40 48 tbd tbd tbd tbd 24 8-36 tbd tbd 83% 85% ucq-1.2/30-d48 .2 30 36 50 00 0.25% 0.25% 48 36-75 30 0.90 8% 83% ucq-1.5/25-d48 .5 25 37.5 50 80 0.25% 0.25% 48 36-75 50 0.94 8% 83% ucq-1.8/30-d48 .8 30 54 00 tbd 0.25% 0.25% 48 36-75 45 .3 83% 86% ucq-2.5/40-d24 2.5 40 00 80 20 0.25% 0.25% 24 8-36 20 4.96 82% 84% ucq-2.5/30-d48 2.5 30 75 50 00 0.2% 0.25% 48 36-75 50 .80 85% 87% ucq-3.3/35-d24 3.3 35 5.5 30 50 0.25% 0.25% 24 8-36 30 5.4 87% 89% ucq-3.3/20-d48 3.3 20 66 50 80 0.25% 0.25% 48 36-75 50 .53 88.5% 90% ucq-3.3/30-d48 3.3 30 99 50 80 0.2% 0.25% 48 36-75 50 2.3 90% 9% ucq-5/20-d24 5 20 00 50 60 0.25% 0.25% 24 8-36 60 4.55 88% 9.5% ucq-5/20-d48 5 20 00 35 55 0.25% 0.25% 48 36-75 80 2.24 89% 93% ucq-8/12-d24 8 2 96 tbd tbd 0.25% 0.25% 24 8-36 tbd tbd 88% 9.5% ucq-12/8.3-d48 2 8.3 99.6 00 50 0.2% 0.25% 48 36-75 80 2.28 90% 9% ucq-15/6.7-d24 5 6.7 00.5 tbd 50 0.25% 0.25% 24 8-36 00 4.6 9% 92%
mdc_ucq models.b02 page 3 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary * the remote on/off can be provided with either positive (no suffx) or negative (n suffx) polarity. all dimensions are in inches (mm) nominal output voltage 3.3 cq 35 - / d48 input voltage range: d24 = 18-36 volts (24v nominal) d48 = 36-75 volts (48v nominal) maximum rated output : current in amps output confguration: unipolar, singular output - n u quarter-brick package b conformal coating h = humiseal added (quantity order) blank = no coating %130 ! " " " ! minimum clearancebetween standoffsand highestcomponent "/44/-6)%7 0).3 ? 0).3 ? ! " " ! -4($8$%%0 490)#!,0, 3#2%7,%.'4(-534 ./4'/4(2/5'("!3%0,!4% 0).3 ? 0).3 ? case c67 ucq with optional baseplate - rohs hazardous materials compliance c = rohs-6 (no lead) y = rohs-5 (with lead) c note: note all model combinations are available. contact mps. i/o connections pin function p32 pin function p32 ?input 5 ?sense 2 remote on/off* 6 output trim 3 +input 7 +sense 4 ?output 8 +output part number structure mechanical specifications h on/off control polarity p = positive polarity n = negative polarity baseplate b = baseplate installed blank = no baseplate component locations may vary between units.
mdc_ucq models.b02 page 4 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ucq-1.2/40-d24 ucq-1.2/30-d48 ucq-1.5/25-d48 ucq-1.8/30-d48 ucq-2.5/40-d24 ucq-2.5/30-d48 ucq-3.3/35-d24 input input voltage range see ordering guide start-up threshold, volts 7 34 34 34 6.8 34 7 undervoltage shutdown, v 6 33 32 32.5 5 32 5 overvoltage shutdown none refected (back) ripple current, ma pk-pk 0-30, model dependent input current full load conditions see ordering guide. inrush transient, a 2 sec 0.05 output short circuit, ma 50-200, model dependent no load, ma 30- 60, model dependent low line (v in = min.), amps 3.4 .23 .26 .74 6.69 2.39 7.2 standby mode, ma (off, uv, ot shutdown) - 0, model dependent internal input flter type l-c pi-type l-c pi-type l-c l-c l-c reverse polarity protection see notes. remote on/off control positive logic (p model suffx) off = ground pin to +0.8v on = open or +3.5 to +3.5v max negative logic (n model suffx) off = open or +3.5 to +3.5v on = ground pin to +v max current, ma output voltage output range see ordering guide. voltage output accuracy % of v nom ., (50% load) adjustment range, % of v nom . 0% 0% ?20 + 0 0% ?20 + 0 ?20 + 0 0% temperature coeffcient 0.02% of v out range per c minimum loading no minimum loading. remote sense compensation +0% ripple/noise (20 mhz bandwidth) see ordering guide. line/load regulation see ordering guide. effciency see ordering guide. maximum capacitive loading, f low esr <0.02? max., resistive load ,000 ,000 0,000 max. 4,700 0,000 0,000 max. 0,000 performance specifcations and ordering guide ? ? specs are typical unless noted.
mdc_ucq models.b02 page 5 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ucq-3.3/20-d48 ucq-3.3/30-d48 ucq-5/20-d24 ucq-5/20-d48 ucq-8/12-d24 ucq-12/8.3-d48 ucq-15/6.7-d24 input input voltage range see ordering guide start-up threshold, volts 35 35 7 35 7 35 7 undervoltage shutdown, v 34 34 6 34 6 34 5.5 overvoltage shutdown none refected (back) ripple current, ma pk-pk 0-30, model dependent. input current full load conditions see ordering guide. inrush transient, a 2 sec 0.05 output short circuit, ma 50-200, model dependent no load, ma 30- 60, model dependent low line (v in = min.), amps 2.04 3.05 6.04 3.02 5.8 3.04 6.2 standby mode, ma (off, uv, ot shutdown) - 0, model dependent internal input flter type l-c l-c l-c l-c l-c l-c pi-type reverse polarity protection see notes. remote on/off control positive logic (p model suffx) off = ground pin to +0.8v on = open or +3.5 to +3.5v max negative logic (n model suffx) off = open or +3.5 to +3.5v on = ground pin to +v max current, ma output voltage output range see ordering guide. voltage output accuracy % of v nom ., (50% load) adjustment range, % of v nom . ?0 to + 0% temperature coeffcient 0.02% of v out range per c. minimum loading no minimum loading. remote sense compensation +0% ripple/noise (20 mhz bandwidth) see ordering guide. line/load regulation see ordering guide. effciency see ordering guide. maximum capacitive loading, f low esr <0.02? max., resistive load 0,000 0,000 0,000 0,000 0,000 0,000 5,000 max. ? specs are typical unless noted. performance specifcations and ordering guide ?
mdc_ucq models.b02 page 6 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ucq-1.2/40-d24 ucq-1.2/30-d48 ucq-1.5/25-d48 ucq-1.8/30-d48 ucq-2.5/40-d24 ucq-2.5/30-d48 ucq-3.3/35-d24 isolation voltage input to output, volts min. 2250 input to baseplate, volts min. 500 baseplate to output, volts min. 500 isolation resistance, m? 0- 00, model dependent isolation capacitance, pf 000 isolation safety rating basic insulation current limit inception (98% of v out , after warmup), amps 52 35 35 36 46 37 45 short circuit protection method current limiting, hiccup autorestart. remove overload for recovery. short circuit current, amps 5 short circuit duration continuous, output shorted to ground. no damage. overvoltage protection, volts (via magnetic feedback) .5 .8 .8 2.7 v max 2.95 2.95 4 dynamic characteristics dynamic load response (50-75-50% load step) tbd 200 sec to % of fnal value 200 sec to % of fnal value 00 sec to % of fnal value 200 sec to % of fnal value 200 sec to % of fnal value 00 sec to % of fnal value start-up time v in to v out regulated, msec 4 50 50 50 50 50 2 remote on/off to v out regulated, msec 4 50 50 50 50 50 3 switching frequency, khz tbd 350 20 440 40 400 480 450 30 350 0 environmental calculated mtbf tbd operating temperature range (ambient) no derating, c ?40 to +85 with derating see derating curves. operating case temperature, c" (no derating) ?40 to +0 storage temperature range, c ?55 to +25 thermal protection/ shutdown, c 0- 25, model dependent relative humidity to +85c/85%, non-condensing performance specifcations and ordering guide ? ? specs are typical unless noted.
mdc_ucq models.b02 page 7 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ucq-3.3/20-d48 ucq-3.3/30-d48 ucq-5/20-d24 ucq-5/20-d48 ucq-8/12-d24 ucq-12/8.3-d48 ucq-15/6.7-d24 isolation voltage input to output, volts min. 2250 input to baseplate, volts min. 500 baseplate to output, volts min. 500 isolation resistance, m? 0- 00, model dependent isolation capacitance, pf 000 isolation safety rating basic insulation current limit inception (98% of v out , after warmup), amps 24 min. 33 min. 26 22 min. 5.6 0 8 short circuit protection method current limiting, hiccup autorestart. remove overload for recovery. short circuit current, amps 5 short circuit duration continuous, output shorted to ground. no damage. overvoltage protection, volts (via magnetic feedback) 4.6 max. 4 max. 6.25 tbd 0 4.4 9.5 dynamic characteristics dynamic load response (50-75-50% load step) 200 sec to % of fnal value 200 sec to % of fnal value 200 sec to % of fnal value 200 sec to % of fnal value 00 sec to % of fnal value 200 sec to % of fnal value 00 sec to % of fnal value start-up time v in to v out regulated, msec 50 50 max. 4 0 max. 4 50 50 remote on/off to v out regulated, msec 50 50 max. 4 0 max. 4 50 50 switching frequency, khz 330 40 330 40 400 24 35 30 340 20 330 40 330 30 environmental calculated mtbf tbd operating temperature range (ambient) no derating, c ?40 to +85 with derating see derating curves. operating case temperature, c" (no derating) ?40 to +0 storage temperature range, c ?55 to +25 thermal protection/ shutdown, c 0- 25, model dependent relative humidity to +85c/85%, non-condensing performance specifcations and ordering guide ? ? specs are typical unless noted.
mdc_ucq models.b02 page 8 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary ucq-1.2/40-d24 ucq-1.2/30-d48 ucq-1.5/25-d48 ucq-1.8/30-d48 ucq-2.5/40-d24 ucq-2.5/30-d48 ucq-3.3/35-d24 physical outline dimensions see mechanical specs. pin material copper alloy pin diameter 0.04/0.062 inches (.06/.524 mm) pin fnish nickel underplate with gold overplate weight, ounces tbd .06 .06 0.9 .06 .06 .02 weight, grams tbd 30 30 25 30 30 29 electromagnetic interference fcc part 5, class b, en55022 (conducted and radiated. external flter required) safety ul 60950- , csa c22.2 no.60950- , iec/en 60950- ucq-3.3/20-d48 ucq-3.3/30-d48 ucq-5/20-d24 ucq-5/20-d48 ucq-8/12-d24 ucq-12/8.3-d48 ucq-15/6.7-d24 physical outline dimensions see mechanical specs. pin material copper alloy pin diameter 0.04/0.062 inches (.06/.524 mm) pin fnish nickel underplate with gold overplate weight, ounces 0.7 tbd .06 tbd tbd .3 0.7 weight, grams 20 tbd 30 tbd tbd 32 20 electromagnetic interference fcc part 5, class b, en55022 (conducted and radiated. external flter required) safety ul 60950- , csa c22.2 no.60950- , iec/en 60950- performance specifcations and ordering guide ? caution: this product is not internally fused. to comply with safety agency certifcations and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals. see fuse information. specifcation notes (1) all models are tested and specifed with external 1||10 f ceramic/tantalum output capacitors no external input capacitor. all capacitors are low esr types. these capacitors are necessary to accom - modate our test equipment and may not be required to achieve specifed performance in your applications. all models are stable and regulate within spec under no-load conditions. all specifcations are typical unless noted. general conditions for specifcations are +25 deg.c, v in and v out = nominal, full load. adequate airfow must be supplied for extended testing under power. (2) input ripple current is tested and specifed over a 5 hz to 20 mhz bandwidth. input fltering is c in = 33 f, 100v tantalum, c bus = 220 f, 100v electrolytic, l bus = 12 h. (3) note that maximum power derating curves indicate an average current at nominal input voltage. at higher temperatures and/or lower airfow, 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 of reduced power dissipation with increasing density altitude. (4) mean time before failure is calculated using the telcordia (belcore) sr-332 method 1, case 3, ground fxed conditions, tpcboard = +25 deg.c, full output load, natural air convection. (5) the 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. this may damage the outputs. (8) output noise may be further reduced by adding an external flter. see i/o filtering and noise reduction. (9) all models are fully operational and meet published specifcations, including cold start at C40 c. (10) regulation specifcations describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. (11) output accuracy is dependent on user-supplied trim resistors. to achieve high accuracy, use 1% or better tolerance metal-flm resistors mounted close to the converter. (12) output current limit and short circuit protection is non-latching. when the overcurrent fault is removed, the converter will immediately recover. (13) do not exceed maximum power specifcations when adjusting the output trim. (14) at zero output current, the output may contain low frequency components which exceed the ripple specifcation. the output may be operated indefnitely with no load. (15) input fusing: if reverse polarity is accidentally applied to the input, a body diode will become forward biased and will conduct considerable current. to ensure reverse input protection with full output load, always connect an external input fast-blow fuse in series with the +v in input. use approximately twice the full input current rating with nominal 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.
mdc_ucq models.b02 page 9 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary absolute maximum ratings input voltage 24v models 48v models continuous 0 to +36 volts 0 to +75 volts transient (100msec) +50 volts +100 volts on/off control 0v min. to +13.5v max. input reverse polarity protection see fuse section output overvoltage tbd output current current-limited. devices can withstand sustained short circuit without damage. operating temperature C40 to +100c storage temperature C55 to +125c lead temperature (soldering 10 sec. max.) +280c c in v in c bu s l bu s c in = 33f , esr < 700m ? @ 100khz c bu s = 220f , esr < 100m ? @ 100khz l bu s = 12h 3 1 +input ?input current pr obe to oscilloscope + ? 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 specifcation defnes the interval between the point at which the converter is turned on (released) and the fully loaded output voltage enters and remains within its specifed 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 insignifcant. input source impedance the input of ucq converters must be driven from a low ac-impedance source. the dc/dcs performance and stability can be compromised by the use of highly inductive source impedances. the input circuit shown in figure 2 is a practical solution that can be used to minimize the effects of inductance in the input traces. for optimum performance, components should be mounted close to the dc/dc converter. i/o filtering, input ripple current, and output noise all models in the ucq series are tested/specifed for input refected ripple current and output noise using the specifed external input/output compo - nents/circuits and layout as shown in the following two fgures. external input capacitors (c in in figure 2) serve primarily as energy-storage elements, mini - mizing 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 sta - bility. in figure 2, c bus and l bus simulate a typical dc voltage bus. your specifc system confguration may necessitate additional considerations. these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional specifcations table is not implied, nor recommended. 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 exists. for datel ucq series dc/dc converters, we recommend the use of a time delay fuse, installed in the ungrounded input supply line. as a rule of thumb however, we recommend the use of a normal-blow or slow-blow fuse with a typical value about twice the maximum input current, calculated at low line with the converters minimum effciency. 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, i.e. iec/en/ul60950- . input reverse-polarity protection if the input voltage polarity is accidentally reversed, an internal diode will become forward biased and likely draw excessive current from the power source. if this source is not current limited or the circuit appropriately fused, it could cause permanent damage to the converter. input under-voltage shutdown and start-up threshold under normal start-up conditions, devices will not begin to regulate properly 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 under-voltage 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 time interval 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 specifed accuracy band. actual measured times will vary with input source impedance, external input capaci - tance, and the slew rate and fnal value of the input voltage as it appears at the converter. the ucq series implements a soft start circuit to limit the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. figure 2. measuring input ripple current in critical applications, output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below specifed limits using flter - ing techniques, the simplest of which is the installation of additional external output capacitors. they function as true flter 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 volt - age and source impedance, as well as particular load and layout conditions.
mdc_ucq models.b02 page 0 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary commonly referred to as power limiting. current limit inception is defned as the point at which the full-power output voltage falls below the specifed tolerance. see performance/functional specifcations. if the load current, being drawn from the converter, is signifcant enough, the unit will go into a short circuit condition as described below. 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 mag - netically 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 voltage to begin ramping to their appropri - ate value. 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 ucq series is capable of enduring an indefnite short circuit output condition. 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. ucq series converters employ a sense feature to provide point of use regulation, thereby overcoming moderate ir drops in pcb conduc - tors or cabling. the remote sense lines carry very little current and therefore require minimal cross-sectional-area conductors. the sense lines, which are capacitively coupled to their respective output 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. [v out (+)-v out (C)] C [sense(+)-sense(C)] 0%v out 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 fxture. figure 3. measuring output ripple/noise (pard) floating outputs since these are isolated dc/dc converters, their outputs are foating with respect to their input. designers will normally use the Coutput (pin 4) as the ground/return of the load circuit. you can however, use the +output (pin 8) as ground/return to effectively reverse the output polarity. minimum output loading requirements ucq converters employ a synchronous-rectifer 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. thermal shutdown the ucq converters are equipped with thermal-shutdown circuitry. if environ - mental conditions cause the 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 specifcations. output over-voltage protection the ucq output voltage is monitored for an over-voltage condition using a com - parator. the signal is optically coupled to the primary side and if the output volt - age rises to a level which could be damaging to the load, the sensing circuitry will power down the pwm controller causing the output voltage to decrease. following a time-out period the pwm will restart, causing the output voltage to ramp to its appropriate value. if the fault condition persists, and the output voltage again climbs to excessive levels, the over-voltage 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 approximately 30% of its rated value, the dc/dc converter will go into a current-limiting mode. in this condi - tion, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. this is c1 c1 = 1f cerami c c2 = 10f t ant alum lo ad 2-3 inches (51-76mm) fr om module c2 r lo ad 7 8 copper stri p 4 5 copper stri p scope +output ?output +sense ?sense figure 4. remote sense circuit confguration in cables and discrete wiring applications, twisted pair or other techniques should be used. output over-voltage protection is monitored at the output volt - age pin, not the sense pin. therefore, excessive voltage differences between v out and sense in conjunction with trim adjustment of the output voltage can ,/!$ /54054 n).054 3ense#urrent #ontactand0#"resistance lossesdueto)2drops #ontactand0#"resistance lossesdueto)2drops 3ense2eturn ).054 /./&& #/.42/, 42)- 3%.3% n/54054 n3%.3% ) /54 2eturn ) /54
mdc_ucq models.b02 page of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary cause the over-voltage protection circuitry to activate (see performance speci - fcations for over-voltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense func - tions can cause output voltages to increase, thereby increasing output power beyond the converters specifed rating, or cause output voltages to climb into the output over-voltage region. therefore, the designer must ensure: (v out at pins) x (i out ) rated output power trimming output voltage ucq converters have a trim capability (pin 6) that enables users to adjust the output voltage (refer to the trim equations and trim graphs that follow). adjust - ments to the output voltage can be accomplished via a trim pot (figure 5) or a single fxed resistor as shown in figures 6 and 7. a single fxed resistor can increase or decrease the output voltage depending on its connection. resistors should be located close to the converter and have tcrs less than 00ppm/c to minimize sensitivity to changes in temperature. if the trim function is not used, leave the trim pin open. figure 5. trim connections using a trimpot ,/!$ 2 42)-50 /54054 n).054 ).054 /./&& #/.42/, 42)- 3%.3% n/54054 n3%.3% ,/!$ 2 42)-$/7. /54054 n).054 ).054 /./&& #/.42/, 42)- 3%.3% n/54054 n3%.3% figure 7. trim connections to decrease output voltages using fixed resistors a single resistor connected from the trim pin (pin 6) to the +sense (pin 7) will increase the output voltage. a resistor connected from the trim pin (pin 6) to the Csense (pin 5) will decrease the output voltage. trim adjustments greater than the specifed range can have an adverse affect on the converters performance and are not recommended. excessive voltage differences between v out and sense, in conjunction with trim adjust - ment of the output voltage, can cause the over-voltage protection circuitry to activate (see performance specifcations for over-voltage limits). temperature/ power derating is based on maximum output current and voltage at the converters output pins. use of the trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converters specifed rating, or cause output voltages to climb into the output over-voltage region. therefore: (v out at pins) x (i out ) rated output power figure 6. trim connections to increase output voltages using fixed resistors where, ? = | ( v nom ? v out ) / v nom | v nom is the nominal, untrimmed output voltage. v out is the desired new output voltage. do not exceed the speci?ed trim range or maximum power ratings when adjusting trim. use 1% precision resistors mounted close to the converter on short leads. trim equations (for all models except the ucq-1.2/40-d24 and -1.2/30-d48) trim down connect trim resistor between trim pin and ?sense ? 5.11 r trimdn (k ) = ? 10.22 trim up connect trim resistor between trim pin and +sense 1.225 ? 5.11 v nom ( 1+ ? ) r trimup (k ) = ? 10.22 ? ? 5.11 trim equations (for the ucq-1.2/40-d24 and -1.2/30-d48) trim down connect trim resistor between trim pin and ?sense 2 ? ? 2 5.11 r trimdn (k ) = trim up connect trim resistor between trim pin and +sense 1.225 ? 5.11 v nom ( 1+ ? ) r trimup (k ) = ,/!$ 452.3 /54054 n).054 ).054 /./&& #/.42/, 42)- 3%.3% n/54054 n3%.3%
mdc_ucq models.b02 page 2 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary the trim pin (pin 6) is a relatively high impedance node that can be suscep - tible to noise pickup when connected to long conductors in noisy environments. in such cases, a 0.22f capacitor between trim and Cv out can be added to reduce this long lead effect. on/off control the input-side, remote on/off control function (pin 2) can be ordered to operate with either polarity: positive (no suffx) : standard models are equipped with positive-polarity and are enabled when pin 2 is left open (or is pulled high, applying +3.5v to + 3.5v with respect to Cinput, pin ) as per figure 8. positive-polarity devices are disabled when pin 2 is pulled low (0 to 0.8v with respect to Cinput). 5#1 $/utput4ransient2esponse 6 ). 6resistiveloadstepto m6div se c di v 5#1 $%nable/n/ff 6 ). 6) /54 ! 6 /54 6div #ontrol 0in 6div mse c di v 5#1 $2ippleand.oise 6 ). 6) /54 !resistiveoutputcaps &ceramic\\ &tantalum m6div se c di v 5#1 $/utput4ransient2esponse 6 ). 6resistiveloadstepto m6div se c di v figure 8. driving the negative polarity on/off control pin negative (n suffx): optional negative-polarity devices are off when pin 2 is left open (or pulled high, applying +3.5v to + 3.5v), and on when pin 2 is pulled low (0 to v) with respect to Cinput as shown in figure 9. ). 0 5 4 6#)2#5)4 6#)2#5)4 n) . 0 5 4 / . / & & # / . 42 / , figure 9. driving the negative polarity on/off control pin dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). the drive circuit should be able to sink appropriate current (see performance specifcations) when activated and withstand appropriate voltage when deactivated. applying an external voltage to pin 2 when no input power is applied to the converter can cause permanent damage to the converter. ). 0 5 4 n) . 0 5 4 6 ## / . / & & # / . 42 / , typical performance curves
mdc_ucq models.b02 page 3 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 30 0 10 15 25 35 20 30 5 35 40 45 50 55 60 65 70 75 80 ucq-1.2/30-d48 maximum current temperature derating no baseplate, v in = 48v (at sea level), longitudinal airflow output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 30 0 10 15 25 20 30 5 35 40 45 50 55 60 65 70 75 80 ucq-1.5/25-d48 maximum current temperature derating no baseplate, v in = 48v (at sea level) , longitudinal airflow output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm natural convection 30 22 24 18 20 28 26 32 30 35 40 45 50 55 60 65 70 75 80 ucq-1.8/30-d48 maximum current temperature derating no baseplate, v in = 48v (at sea level), longitudinal airflow 4 6 8 10 14 16 18 20 12 24 26 28 30 22 72 74 70 78 76 82 80 84 88 86 90 v in = 48v v in = 75v efficiency (%) load current (amps) v in = 36v ucq-1.8/30-d48 efficiency vs line voltage and load current @25? c v in = 48v v in = 75v efficiency (%) load current (amps) v in = 36v 40 50 55 65 75 60 70 85 80 90 45 6 3 9 12 15 18 21 24 27 75 30 95 ucq-1.2/30-d48 efficiency vs line voltage and load current @25? c efficiency (%) load current (amps) 3 11 4 5 6 7 9 10 12 8 13 21 14 15 16 17 19 20 22 24 23 25 18 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 ucq-1.5/25-d48 efficiency vs line voltage and load current @25? c v in = 48v v in = 75v v in = 36v typical performance curves
mdc_ucq models.b02 page 4 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary 95 90 85 80 75 70 ucq-3.3/30-d48 efficiency vs line voltage and load current @2 5 c 5 10 15 20 25 30 load current (amps) efficiency ( % ) v in = 75v v in = 36v v in = 50v typical performance curves v in = 48v v in = 75v v in = 36v ucq-2.5/30-d48 efficiency vs line voltage and load current @25? c efficiency (%) 40 50 55 65 75 60 70 85 80 90 45 95 load current (amps) 6 3 1 9 12 15 18 21 24 27 30 3 6 9 70 75 85 95 80 90 65 60 55 50 12 15 18 21 24 27 30 33 36 39 40 v in = 24v v in = 35v efficiency (%) load current (amps) v in = 18v ucq-2.5/40-d24 efficiency vs line voltage and load current @25? c output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 0 10 15 25 35 20 30 5 35 30 40 45 50 55 60 65 70 75 80 ucq-2.5/30-d48 maximum current temperature derating no baseplate, v in = 24v (at sea level) output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 30 0 10 15 25 35 20 30 5 35 40 45 50 55 60 65 70 75 80 ucq-2.5/40-d24 maximum current temperature derating no baseplate, v in = 24v (at sea level) output current (amps) ambient temperature ( c) 25 30 35 40 45 50 55 60 65 70 75 80 85 40 35 30 25 20 15 10 5 0 400 lfm 200 lfm 300 lfm 100 lfm ucq-3.3/30-d48 maximum current temperature derating no baseplate, v in = 48v (at sea level)
mdc_ucq models.b02 page 5 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary typical performance curves efficiency (%) load current (amps) 70 74 76 80 84 78 82 88 86 90 72 92 ucq-3.3/35-d24 efficiency vs line voltage and load current @25? c v in = 18v v in = 24v v in = 36v 5 3 7 9 11 17 19 15 21 23 25 27 29 35 33 31 output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 30 0 10 15 25 35 20 30 5 35 40 45 50 55 60 65 70 75 80 ucq-3.3/35-d24 maximum current temperature derating no baseplate, v in = 48v (at sea level), longitudinal airflow output current (amps) ambient temperature ( c) 25 30 35 40 45 50 55 60 65 70 75 80 85 40 35 30 25 20 15 10 5 0 400 lfm 200 lfm 300 lfm 100 lfm ucq-3.3/30-d48 maximum current temperature derating with baseplate, v in = 48v (at sea level) output current (amps) ambient temperature ( c) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 36 34 32 30 28 26 24 22 20 18 400 lfm natural convection 200 lfm 300 lfm 100 lfm ucq-3.3/35-d48 maximum current temperature derating with baseplate, v in = 48v (transverse air flow at sea level) 95 90 85 80 75 70 ucq-5/20-d48 efficiency vs line voltage and load current @2 5 c 4 6 8 10 12 14 16 18 20 load current (amps) efficiency ( % ) v in = 75v v in = 36v v in = 50v
murato power solutions, inc. cabot boulevard, mansfeld, ma 02048-5 u.s.a. tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 www.murata-ps.com email: sales@murata-ps.com iso 9001 registered ds-0555 2/7/07 ? 2007 murata power solutions, inc. 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 herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. specifcations are subject to change without notice. usa: tucson (az), tel: (800) 547 2537, email: sales@murata-ps.com canada: toronto, tel: (866) 740 232, email: toronto@murata-ps.com uk: milton keynes, tel: +44 (0) 908 6 5232, email: mk@murata-ps.com france: montigny le bretonneux, tel: +33 (0) 34 60 0 0 , email: france@murata-ps.com germany: mnchen, tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com japan: tokyo, tel: 3-3779- 03 , email: sales_tokyo@murata-ps.com osaka, tel: 6-6354-2025, email: sales_osaka@murata-ps.com website: www.murata-ps.jp china: shanghai, tel: +86 2 5 027 3678, email: shanghai@murata-ps.com guangzhou, tel: +86 208 22 8066, email: guangzhou@murata-ps.com mdc_ucq models.b02 page 6 of 7 technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000 www.murata-ps.com single output ucq model s low-profle, quarter brick, 6.7-40 amp isolated dc/dc converters preliminary v in = 48v v in = 75v v in = 36v efficiency (%) 70 74 76 80 84 78 82 90 88 94 92 72 96 ucq-12/8.3-d48 efficiency vs line voltage and load current @25? c load current (amps) 1.6 0.8 3.2 2.4 4 5.6 4.8 6.4 8.3 7.2 output current (amps) ambient temperature ( c) 400 lfm 200 lfm 300 lfm 100 lfm 0 2 3 6 5 9 4 8 7 1 35 30 0 40 45 50 55 60 65 70 75 80 ucq-12/8.3-d48 maximum current temperature derating no baseplate, v in = 48v (at sea level), longitudinal airflow typical performance curves

▲Up To Search▲

Price & Availability of UCQ-1240-D24PB-C

	To Download UCQ-1240-D24PB-C Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .