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hph-12/30-d48 series isolated, 12 v out , 30a, half-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 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 1 of 12 for applications requiring improved electrical and thermal performance, consider muratas new hph series half brick dc/dc power converters. these compact modules measure 2.4" x 2.3" x 0.4" (61 x 58 x 10.2mm) and offer the industry-standard half brick footprint. the module will provide a 12vdc output at 30amps and accept a wide range input voltage of 36-75vdc. the hph topology offers high ef? ciency up to 93%, tight line and load regulation, low ripple/ noise, and a fast dynamic load response. a single- board, highly optimized thermal design contributes to the superior thermal performance. these dc/dcs provide output trim, sense pins, and primary side on/off control. standard features also include input under-voltage shutdown, output over-voltage protection, output short-circuit/current limiting protection, and thermal shutdown. product overview typical unit switch control pwm controller opto isolation reference & error amp pulse transformer +vin (4) Cvin (1) remote on /off control* (3) vout trim (7) Csense (8) Cvout (9) +vout (5) +sense (6) input undervoltage, input overvoltage, and output overvoltage comparators * can be ordered with positive (standard) or negative (optional) polarity. typical topology is shown. some models may vary slightly. features 12vout @ 30a (360w) industry standard half brick package high ef? ciency: up to 93% outstanding thermal performance optional baseplate for conduction cooled applications no output reverse conduction input to output isolation, 2250vdc (basic) input under-voltage lockout on/off control (positive or negative logic) output over-voltage protection thermal shutdown output short circuit protection (hiccup technique) contents page description, photograph, connection diagram 1 ordering guide, model numbering 2 mechanical specs, input/output pinout 3 detailed electrical speci? cations 4 application notes 7 soldering guidelines 10 performance data 11 figure 1. simpli? ed schematic typ ical u ni eatures $
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 2 of 12 part number structure note: because of the high currents, wire the appropriate input, output and common pins in parallel. be sure to use adequate pc board etch. if not suf? cient, install additional discrete wiring. performance specifications and ordering guide root model output input efficiency package (case/ pinout) v out (volts) ? i out (amps, max.) ? power r/n (mv pk-pk) regulation (max.) v in nom. (volts) range (volts) i in , no load (ma) i in , full load (amps) (watts) typ. max. line load min. typ. hph-12/30-d48 12 30 360 100 200 0.05% 0.1% 48 36-75 150 8.1 92% 93% c61 p17 please refer to the full model number structure for additional ordering part numbers and options. please refer to maximum input/output voltage graph. all speci? cations are at nominal line voltage and full load, +25oc. unless otherwise noted. see detailed speci? cations. full power continuous output requires baseplate installation. please refer to the derating curves. nominal output voltage 12 hph 30 - / d48 maximum output current in amps high-power half brick series - n h h lx b input voltage range: d48 = 36-75 volts (48v nominal) conformal coating (optional) blank = no coating, standard h = coating added, optional, special quantity order pin length option blank = standard pin length 0.180 in. (4.6 mm) l1 = 0.110 in. (2.79 mm)* l2 = 0.145 in. (3.68 mm)* *special quantity order required - c rohs hazardous materials compliance c = rohs-6 (no lead), standard, does not claim eu exemption 7b C lead in solder y = rohs-5 (with lead), optional, special quantity order note: some model combinations may not be available. contact murata power solutions for availability. on/off control polarity n = negative polarity, standard p = positive polarity, optional baseplate (optional) blank = no baseplate, standard b = baseplate installed, optional quantity order 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 figure 1 C on/off enable control ground bounce protection 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.
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 3 of 12 mechanical specifications since there is some pin numbering inconsistency between manufacturers of half brick converters, be sure to follow the pin function, not the pin number, when laying out your board. standard pin length is shown. please refer to the part number structure for special order pin lengths. * note that the case connects to the baseplate (when installed). this case connection is isolated from the rest of the converter. pin 2 may be deleted under special order. please contact murata power solutions for information. the trim connection may be left open and the converter will achieve its rated output voltage. 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? input/output connections pin function p17 1 negative input 2 case* 3 on/off control 4 positive input 5 positive output 6 positive sense 7 trim 8 negative sense 9 negative output pin 2 may be removed under special order. please contact murata power solutions. bottom view 1 2 3 4 5 6 7 8 9 1.900 (48.26) 2.30 (58.4) 0.40 (10.2) 0.18 (4.57) 0.20 (5.1) 0.015 min. clearance between standoffs and highest component 0.400 (10.16) 0.700 (17.78) 0.50 (12.70) 1.000 (25.40) 1.400 (35.56) 2.40 (60.96) pin diameters: pins 1-4, 6-8 0.040 0.001 (1.016 0.025) pins 5, 9 0.080 0.001 (2.032 0.025) hph with optional baseplate 0.18 (4.6) 0.50 (12.7) 2.40 (61.0) 2.00 (50.8) 1.90 (48.3) 2.30 (58.4) 0.015 minimum clearance between standoffs and highest component do not remove m3 x 0.50 threaded inserts from bottom pcb users thermal surface and hardware recommended threaded insert torque is 0.35-0.55 n-m or 3-5 in-lbs. m3 x 0.50 threaded insert and standoff (4 places) screw length must not go through baseplate baseplate case c61 a b a b
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 4 of 12 functional specifications absolute maximum ratings conditions ? minimum typical/nominal maximum units input voltage, continuous full power operation 0 75 vdc ambient temperature range -40 85 vdc input voltage, transient operating or non-operating, tested: 100 ms max. duration 0 100 vdc isolation voltage input to output tested 100 ms iec/en/ul 60950-1, 2nd edition 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on or off, referred to -vin 0 50 vdc output power 0 450 w output current current-limited, no damage, short-circuit protected 016a storage temperature range vin = zero (no power) -55 125 ?c absolute maximums are stress ratings. exposure of devices to greater than any of these conditions may adversely affect long-ter m reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied nor recommended. input operating voltage range ? 36 48 75 vdc turn on/start-up threshold rising input voltage 33 34 35 vdc turn off/undervoltage lockout falling input voltage 31 32 33 vdc reverse polarity protection none, install external fuse none vdc recommended external fuse fast blow 20 a internal filter type pi input current full load conditions vin = nominal 8.06 8.23 a low line vin = minimum 10.75 10.98 a inrush transient 0.3 a 2 -sec. output in short circuit 50 100 ma no load iout = minimum, unit=on 150 200 ma standby mode (off, uv, ot) 45ma re? ected (back) ripple current ? measured at input with speci? ed ? lter 60 100 ma, rms general and safety ef? ciency vin=48v, full load 92 93 % vin=36v, full load 92 93 % isolation isolation voltage: no baseplate input to output, continuous 2250 vdc isolation voltage: with baseplate input to output, continuous tbd vdc input to baseplate, continuous 1500 output to baseplate, continuous 1500 insulation safety rating basic isolation resistance 100 mohm isolation capacitance 2,000 pf safety (designed to meet the following requirements) ul-60950-1, csa-c22.2 no.60950-1, iec/en60950-1, 2nd edition yes calculated mtbf per mil-hdbk-217f ground benign, tambient=+30?c tbd hours x 10 6 per telcordia sr332, issue 1 class 3, ground ? xed, tambient=+40?c 1.4 hours x 10 6 dynamic characteristics fixed switching frequency 350 400 450 khz startup time power on to vout regulated 10-90% (50% resistive load) 20 ms startup time remote on to 10% vout (50% resistive load) 20 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout di/dt = 1 a/sec 200 400 sec dynamic load peak deviation same as above 400 mv features and options remote on/off control ? n suf? x: negative logic, on state on = pin grounded or external voltage 0 0.8 v negative logic, off state off = pin open or external voltage 3.5 13.5 v control current open collector/drain 1 2 ma
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 5 of 12 features and options (cont.) conditions ? minimum typical/nominal maximum units remote on/off control (cont.) ? p suf? x: positive logic, on state on = pin open or external voltage 3.5 13.5 v positive logic, off state off = pin grounded or external voltage 0 1 v control current open collector/drain 1 2 ma base plate b suf? x output total output power see derating 0.0 360 w voltage nominal output voltage no trim 11.88 12.00 12.12 vdc setting accuracy at 50% load -1 1 % of vnom. output voltage range user-adjustable [6] -10 10 % of vnom. overvoltage protection via magnetic feedback 14.5 vdc current output current range 030a minimum load no minimum load current limit inception ? 98% of vnom., after warmup 31.5 37 44 a short circuit short circuit current hiccup technique, autorecovery within 1% of vout, non-latching 6.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation ? line regulation vin=min. to max. vout=nom., 50% load 0.05 % load regulation iout=min. to max. vin=48v. 0.1 % ripple and noise ? 5 hz- 20 mhz bw 100 200 mv pk-pk temperature coef? cient at all outputs 0.02 % of vnom./c maximum capacitive loading (10% ceramic, 90% oscon) cap. esr=<0.02, full resistive load 0 10,000 f mechanical (through hole models) outline dimensions (no baseplate) cxx case 2.3 x 2.4 x 0.4 inches wxlxh (please refer to outline drawing) 58.4 x 60.96 x 10.2 mm outline dimensions (with baseplate) 2.3 x 2.4 x 0.5 inches 36.8x58.4x12.7 mm weight (no baseplate) tbd ounces tbd grams weight (with baseplate) ounces grams through hole pin diameter inches mm through hole pin material copper alloy th pin plating metal and thickness nickel subplate -inches gold overplate -inches case or baseplate material aluminum environmental operating ambient temperature range with derating, full power, natural convection, no baseplate -40 85 ?c operating ambient temperature range with baseplate no derating, with baseplate, full power -40 120 ?c storage temperature vin = zero (no power) -55 125 ?c thermal protection/shutdown measured at hotspot 120 ?c electromagnetic interference conducted, en55022/cispr22 external ? lter required b class radiated, en55022/cispr22 b class relative humidity, non-condensing to +85c 10 90 %rh altitude -500 10,000 feet (must derate -1%/1000 feet) -152 3048 meters rohs rating rohs-6 or rohs-5 (specify) functional specifications (cont.)
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com notes ? unless otherwise noted, all speci? cations are at nominal input voltage, nominal output voltage and full load. general conditions are +25? celsius ambient temperature, near sea level altitude, natural convection air? ow. all models are tested and speci? ed with external parallel 1 f and 10 f multi-layer ceramic output capacitors. no external input capacitors are installed. all capacitors are low-esr types wired close to the converter. these capacitors are necessary for our test equipment and may not be needed in the users application. ? the module will operate when input voltage is within the 36-75v operating voltage range, output regulation at full load will be achieved only when vin >= 39v ? input (back) ripple current is tested and speci? ed over 5 hz to 20 mhz bandwidth. input ? ltering is cbus = 0 f, cin = 100 f and lbus = < 4.7 h. ? the remote on/off control is referred to -vin. ? over-current protection is non-latching with auto reovery (hiccup) ? regulation speci? cations describe the output voltage changes as the line voltage or load current is varied from its nominal or midpoint value to either extreme. ? output ripple & noise is measured with 750 f capacitance, 10% ceramic and 90% oscon. 20 mhz bandwidth. 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 6 of 12
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 7 of 12 input fusing certain applications and/or safety agencies may require fuses at the inputs of power conversion components. fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. for greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. the installer must observe all relevant safety standards and regulations. for safety agency approvals, install the converter in compliance with the end-user safety standard, i.e. iec/en/ul 60950-1. input reverse-polarity protection if the input voltage polarity is 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 perma- nent damage to the converter. input under-voltage shutdown and start-up threshold under normal start-up conditions, converters will not begin to regulate properly until the ramping-up input voltage exceeds and remains at the start-up threshold voltage (see speci? cations). once operating, converters will not turn off until the input voltage drops below the under-voltage shutdown limit. subsequent restart will not occur until the input voltage rises again above the start-up threshold. this built-in hysteresis prevents any unstable on/off opera- tion at a single input voltage. users should be aware however of input sources near the under-voltage shutdown whose voltage decays as input current is consumed (such as capac- itor inputs), the converter shuts off and then restarts as the external capacitor recharges. such situations could oscillate. to prevent this, make sure the operating input voltage is well above the uv shutdown voltage at all times. start-up time assuming that the output current is set at the rated maximum, the vin to vout start-up time (see speci? cations) is the time interval between the point when the ramping input voltage crosses the start-up threshold and the fully loaded regulated output voltage enters and remains within its speci? ed accuracy band. actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and ? nal value of the input voltage as it appears at the converter. these converters include a soft start circuit to moderate the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off remote control interval from on command to vout regulated assumes that the converter already has its input voltage stabilized above the start-up threshold before the on command. the interval is measured from the on command until the output enters and remains within its speci? ed accuracy band. the speci? cation assumes that the output is fully loaded at maximum rated current. similar conditions apply to the on to vout regulated speci? cation such as external load capacitance and soft start circuitry. input source impedance these converters will operate to speci? cations without external components, assuming that the source voltage has very low impedance and reason- able input voltage regulation. since real-world voltage sources have ? nite application notes impedance, performance is improved by adding external ? lter components. sometimes only a small ceramic capacitor is suf? cient. since it is dif? cult to totally characterize all applications, some experimentation may be needed. note that external input capacitors must accept high speed switching currents. because of the switching nature of dc/dc converters, the input of these converters must be driven from a source with both low ac impedance and adequate dc input regulation. performance will degrade with increasing input inductance. excessive input inductance may inhibit operation. the dc input regulation speci? es that the input voltage, once operating, must never degrade below the shut-down threshold under all load conditions. be sure to use adequate trace sizes and mount components close to the converter. i/o filtering, input ripple current and output noise all models in this converter series are tested and speci? ed for input re? ected ripple current and output noise using designated external input/output compo- nents, circuits and layout as shown in the ? gures below. external input capacitors (cin in the ? gure) serve primarily as energy storage elements, minimizing line voltage variations caused by transient ir drops in the input conductors. users should select input capacitors for bulk capacitance (at appropriate frequencies), low esr and high rms ripple current ratings. in the ? gure below, the cbus and lbus components simulate a typical dc voltage bus. your speci? c system con? guration may require additional considerations. please note that the values of cin, lbus and cbus will vary according to the speci? c converter model. c in v in c bus l bus c in = 33f, esr < 700m @ 100khz c bus = 220f, esr < 100m @ 100khz l bus = 12h 4 1 +input -input current probe to oscilloscope + C + C figure 2. measuring input ripple current in critical applications, output ripple and noise (also referred to as periodic and random deviations or pard) may be reduced by adding ? lter elements such as multiple external capacitors. be sure to calculate component tem- perature rise from re? ected ac current dissipated inside capacitor esr. our application engineers can recommend potential solutions. in ? gure 3, the two copper strips simulate real-world printed circuit imped- ances between the power supply and its load. in order to minimize circuit errors and standardize tests between units, scope measurements should be made using bnc connectors or the probe ground should not exceed one half inch and soldered directly to the ? xture.
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 8 of 12 floating outputs since these are isolated dc/dc converters, their outputs are ? oating with respect to their input. the essential feature of such isolation is ideal zero current flow between input and output. real-world converters however do exhibit tiny leakage currents between input and output (see speci? cations). these leakages consist of both an ac stray capacitance coupling component and a dc leakage resistance. when using the isolation feature, do not allow the isolation voltage to exceed speci? cations. otherwise the converter may be damaged. designers will normally use the negative output (-output) as the ground return of the load circuit. you can however use the positive output (+output) as the ground return to effectively reverse the output polarity. minimum output loading requirements these converters employ a synchronous recti? er design topology. all models regulate within speci? cation and are stable under no load to full load condi- tions. operation under no load might however slightly increase output ripple and noise. thermal shutdown to prevent many over temperature problems and damage, these converters include thermal shutdown circuitry. if environmental conditions cause the temperature of the dc/dcs to rise above the operating temperature range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. when the temperature decreases below the turn-on threshold, the converter will automatically restart. there is a small amount of hysteresis to prevent rapid on/off cycling. the temperature sensor is typically located adjacent to the switching controller, approximately in the center of the unit. see the performance and functional speci? cations. caution: if you operate too close to the thermal limits, the converter may shut down suddenly without warning. be sure to thoroughly test your applica- tion to avoid unplanned thermal shutdown. temperature derating curves the graphs in the next section illustrate typical operation under a variety of conditions. the derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable under increasing forced air? ow measured in linear feet per minute (lfm). note that these are average measurements. the converter will accept brief increases in temperature and/or current or reduced air? ow as long as the aver- age is not exceeded. note that the temperatures are of the ambient air? ow, not the converter itself which is obviously running at higher temperature than the outside air. also note that very low ? ow rates (below about 25 lfm) are similar to natural convection, that is, not using fan-forced air? ow. mps makes characterization measurements in a closed cycle wind tunnel with calibrated air? ow. we use both thermocouples and an infrared camera system to observe thermal performance. as a practical matter, it is quite dif? cult to insert an anemometer to precisely measure air? ow in most applications. sometimes it is possible to estimate the effective air? ow if you thoroughly understand the enclosure geometry, entry/exit ori? ce areas and the fan ? owrate speci? cations. if in doubt, contact mps to discuss placement and measurement techniques of suggested temperature sensors. caution: if you routinely or accidentally exceed these derating guidelines, the converter may have an unplanned over temperature shut down. also, these graphs are all collected at slightly above sea level altitude. be sure to reduce the derating for higher density altitude. output overvoltage protection this converter monitors its output voltage for an over-voltage condition using an on-board electronic comparator. the signal is optically coupled to the pri- mary side pwm controller. if the output exceeds ovp limits, the sensing circuit will power down the unit, and the output voltage will decrease. after a time-out period, the pwm will automatically attempt to restart, causing the output volt- age to ramp up to its rated value. it is not necessary to power down and reset the converter for this automatic ovp-recovery restart. if the fault condition persists and the output voltage climbs to excessive levels, the ovp circuitry will initiate another shutdown cycle. this on/off cycling is referred to as hiccup mode. it safely tests full current rated output voltage without damaging the converter. output fusing the converter is extensively protected against current, voltage and temperature extremes. however your output application circuit may need additional protec- tion. in the extremely unlikely event of output circuit failure, excessive voltage could be applied to your circuit. consider using an appropriate fuse in series with the output. output current limiting as soon as the output current increases to its maximum rated value, the dc/dc converter will enter a current-limiting mode. the output voltage will decrease proportionally with increases in output current, thereby maintaining a some- what constant power output. this is commonly referred to as power limiting. current limiting inception is de? ned as the point at which full power falls below the rated tolerance. see the performance/functional speci? cations. note particularly that the output current may brie? y rise above its rated value. this enhances reliability and continued operation of your application. if the output current is too high, the converter will enter the short circuit condition. output 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 voltage to begin ramping up to its figure 3. measuring output ripple and noise (pard) c1 c1 = 0.1f ceramic c2 = 10f tantalum load 2-3 inches (51-76mm) from module c2 r load 6 5 copper strip copper strip scope +output +sense 9 8 -sense -output
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 9 of 12 appropriate value. if the short-circuit condition persists, another shutdown cycle will initiate. this on/off cycling is called hiccup mode. the hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures. a short circuit can be tolerated inde? nitely. remote sense input sense inputs compensate for output voltage inaccuracy delivered at the load. this is done by correcting voltage drops along the output wiring such as mod- erate ir drops and the current carrying capacity of pc board etch. sense inputs also improve the stability of the converter and load system by optimizing the control loop phase margin. note: the sense input and power vout lines are internally connected through low value resistors to their respective polarities so that the converter can operate without external connection to the sense. nevertheless, if the sense function is not used for remote regulation, the user should connect +sense to +vout and Csense to Cvout at the converter pins. the remote sense lines carry very little current. they are also capacitively coupled to the output lines and therefore are in the feedback control loop to regulate and stabilize the output. as such, they are not low impedance inputs and must be treated with care in pc board layouts. sense lines on the pcb should run adjacent to dc signals, preferably ground. in cables and discrete wiring, use twisted pair, shielded tubing or similar techniques. please observe sense inputs tolerance to avoid improper operation: [vout(+) Cvout(-)] C [ sense(+) C sense(-)] 10% of vout a single ? xed resistor connected between the trim input and either the +sense or Csense terminals. (on some converters, an external user-supplied precision dc voltage may also be used for trimming). trimming resistors should have a low temperature coef? cient (100 ppm/deg.c or less) and be mounted close to the converter. keep leads short. if the trim function is not used, leave the trim unconnected. with no trim, the converter will exhibit its speci? ed output voltage accuracy. there are two cautions to be aware for the trim input: caution: to avoid unplanned power down cycles, do not exceed either the maximum output voltage or the maximum output power when setting the trim. be particularly careful with a trimpot. if the output voltage is excessive, the ovp circuit may inadvertantly shut down the converter. if the maximum power is exceeded, the converter may enter current limiting. if the power is exceeded for an extended period, the converter may overheat and encounter overtem- perature shut down. caution: be careful of external electrical noise. the trim input is a senstive input to the converters feedback control loop. excessive electrical noise may cause instability or oscillation. keep external connections short to the trim input. use shielding if needed. also consider adding a small value ceramic capacitor between the trim and Cvout to bypass rf and electrical noise. figure 4. remote sense circuit con? guration output overvoltage protection is monitored at the output voltage pin, not the sense pin. therefore excessive voltage differences between vout and sense together with trim adjustment of the output can cause the overvoltage protec- tion circuit to activate and shut down the output. power derating of the converter is based on the combination of maximum output current and the highest output voltage. therefore the designer must insure: (vout at pins) x (iout) (max. rated output power) trimming the output voltage the trim input to the converter allows the user to adjust the output voltage over the rated trim range (please refer to the speci? cations). in the trim equa- tions and circuit diagrams that follow, trim adjustments use either a trimpot or load 5 8 7 6 9 contact and pcb resistance losses due to ir drops contact and pcb resistance losses due to ir drops +output +sense trim -sense -output -input on/off control +input 1 3 4 sense current i out sense return i out return figure 5. trim adjustments using a trimpot load 5 8 7 6 5-22 turns 1 3 4 9 +output +sense trim -sense -output -input on/off control +input figure 6. trim adjustments to increase output voltage using a fixed resistor load 5 8 7 6 r trim up 1 3 4 9 +output +sense trim -sense -output -input on/off control +input
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 10 of 12 trim equations where vref = +1.225 volts and is the desired output voltage change. note that "" is given as a small fraction, not a percentage. a single resistor connected between trim and +sense will increase the output voltage. a resistor connected between trim and Csense will decrease the output. remote on/off control on the input side, a remote on/off control can be ordered with either polarity. positive: standard models are enabled when the on/off pin is left open or is pulled high to +vin with respect to Cvin. an internal bias current causes the open pin to rise to +vin. some models will also turn on at lower intermediate voltages (see speci? cations). positive-polarity devices are disable when the on/off is grounded or brought to within a low voltage (see speci? cations) with respect to Cvin. negative: optional negative-polarity devices are on (enabled) when the on/ off is grounded or brought to within a low voltage (see speci? cations) with respect to Cvin. the device is off (disabled) when the on/off is pulled high to +vin with respect to Cvin. figure 7. trim adjustments to decrease output voltage using a fixed resistor figure 8. driving the positive polarity on/off control pin figure 9. driving the negative polarity on/off control pin dynamic control of the on/off function should be able to sink appropriate signal current when brought low and withstand appropriate voltage when brought high. be aware too that there is a ? nite time in milliseconds (see speci? cations) between the time of on/off control activation and stable, regulated output. this time will vary slightly with output load type and current and input conditions. there are two cautions for the on/off control: caution: while it is possible to control the on/off with external logic if you carefully observe the voltage levels, the preferred circuit is either an open drain/open collector transistor or a relay (which can thereupon be controlled by logic). caution: do not apply voltages to the on/off pin when there is no input power voltage. otherwise the converter may be permanently damaged. 1 3 4 5 8 7 6 9 +output +sense trim -sense -output -input on/off control +input load r trim down 1 3 4 on/off control -input +input +vcc r adj_up ( in k ) = - - 2 v nominal x (1+) 1 1.225 x where = v nominal - v out v nominal r adj_down ( in k ) = - 2 1 where = v out - v nominal v nominal on/off control control + vcc -input 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 differ; 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: for sn/pb based solders: maximum preheat temperature 115 c. maximum preheat temperature 105 c. maximum pot temperature 270 c. maximum pot temperature 250 c. maximum solder dwell time 7 seconds maximum solder dwell time 6 seconds
hph-12/30-d48 series isolated, 12 v out , 30a, half-brick dc/dc converters www.murata-ps.com email: sales@murata-ps.com typical performance data 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 11 of 12 figure 10. transient response (load 50% to 75%) figure 11. transient response (load 50% to 100%) figure 12. enable start-up (vin=48v iout=30a) figure 13. enable start-up (vin=48v iout=0a) figure 14. ripple and noise waveform (vin=48v iout=30a) figure 15. ripple and noise waveform (vin=48v iout=0a) stepload transient response on/off enable start-up ripple and noise
hph-12/30-d48 series isolated, 12 v out , 30a, half-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. ? 2010 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 13 jul 2010 mdc_hph-12/30-d48.a01.d1 page 12 of 12 typical performance data ef? ciency vs line voltage and load current @ +25c maximum current temperature derating vs. air? ow (vin=48v., air? ow direction is from Cvin to +vin, with baseplate) maximum current temperature derating vs. air? ow (vin=48v., air? ow direction is from Cvin to +vin, no baseplate) maximum current temperature derating vs. air? ow (vin=48v., air? ow direction is from vin to vout, with baseplate) 78 80 82 84 86 88 90 92 94 96 98 3 6 9 12151821242730 v in = 36v v in = 48 v v in = 75 v ef?ciency (%) load current (amps) 30 35 40 45 50 55 60 65 70 75 80 85 0 5 10 15 20 25 30 35 natural convection 100 lfm 200 lfm 300 lfm 400 lfm output current (amps) ambient temperature (c) 30 35 40 45 50 55 60 65 70 75 80 85 0 5 10 15 20 25 30 35 natural convection 100 lfm 200 lfm 300 lfm 400 lfm output current (amps) ambient temperature (c) 30 35 40 45 50 55 60 65 70 75 80 85 0 5 10 15 20 25 30 35 natural convection 100 lfm 200 lfm 300 lfm 400 lfm output current (amps) ambient temperature (c)

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