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for full details go to www.murata-ps.com/rohs www.murata-ps.com www.murata-ps.com technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 1 of 12 murata power solutions fully isolated hph series of dc/dc converters affords users a practical solu- tion for their low-voltage/high-current applications. with an input voltage range of 36 to 75 volts, the hph series delivers up to 70 amps of output current from a fully regulated 3.3v output. using both surface-mount technology and pla- nar magnetics, these converters are manufactured on a 2.3" x 2.4", lead-free, open-frame package with an industry-standard pinout. hph converters utilize a full-bridge, ?xed- frequency topology along with synchronous output recti?cation to achieve a high ef?ciency. this ef?ciency, coupled with the open-frame package that allows unrest ricted air ?ow, reduces internal component temperatures thereby allowing operation at elevated ambient temperatures. these dc/dcs provide output trim, sense pins and primary side on/off control (available with posi- tive or negative logic). standard features also include input undervoltage shutdown circuitry, output over- voltage protection, output short-circuit and current limiting protection and thermal shutdown. all devices meet iec/ul/en60950-1 safety standards and carry the ce mark (meet lvd requirements). product overview typical unit simplified schematic 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 rohs compliant 3.3v to 12v outputs @ up to 70 amps input range: 36v-75v open frame: 2.3" x 2.4" x 0.40" industry-standard package/pinout remote sense, trim, on/off control high ef?ciency: up to 91% fully isolated, 2250vdc (basic) input undervoltage shutdown output overvoltage protection short circuit protection, thermal shutdown designed to meet ul/en/iec 60950-1, can/ csa-c22.2 no. 60950-1 safety approvals ce mark optional baseplate offers increased thermal performance $
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 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 1 output input ef?ciency 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-1.5/80-d48n-c 1.5 80 120 please contact murata power solutions for further information. 2 hph-1.8/80-d48n-c 1.8 80 144 hph-2.5/80-d48n-c 2.5 80 200 hph-3.3/70-d48n-c 3.3 70 231 100 125 0.25% 0.25% 48 36-75 70 5.35 88% 90% c61 p17 hph-5/40-d48n-c 5 40 200 100 125 0.25% 0.25% 48 36-75 70 4.58 90% 91% c61 p17 hph-12/30-d48n-c 12 30 360 100 200 0.05% 0.1% 48 36-75 150 8.06 92% 93% c61 p17 1 please refer to the full model number structure for additional ordering part numbers and options. 2 contact murata power solutions for availability. 3 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 3.3 hph 70 - / d48 maximum output current in amps unipolar high-power 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.
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 3 of 12 mechanical specifications since there is some pinout inconsistency between manufacturers of half brick converters, be sure to follow the pin function, not the pin number, when laying out your board. * 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 ?input 2 case* 3 on/off control 4 +input 5 +output 6 +sense 7 trim 8 ?sense 9 ?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 (4.6) 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
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 4 of 12 input characteristics model family start-up threshold un- dervolt- age shut- down 12 re?ected (back) ripple current input current 1 internal input filter type reverse polarity protection 16 remote on/off control 6 typ. inrush tran- sient output short circuit no load low line standby mode current (max.) positive logic negative logic v v ma pk-pk a 2 sec ma ma a ma ma p model suf?x n model suf?x hph-3.3/70-d48 35 33.5 20 0.1 50 70 7.13 1 pi-type see notes 2 off=gnd. pin to +1v max. on=open pin or +3.5 to +13.5v max. off=open pin or +3.5v to +13.5v max. on=gnd. pin to +1v max. hph-5/40-d48 35 33.5 20 0.05 50 70 6.11 4 2 off=gnd. pin to +1v max. on=open pin or +3.5 to +13.5v max. off=open pin or +3.5v to +13.5v max. on=gnd. pin to +1v max. hph-12/30-d48 34 32 60 0.3 50 150 10.8 4 2 output characteristics model family v out accuracy adjustment range 8 temperature coef?cient capacitance loading overvoltage protection 10 15 over- voltage protection method remote sense compensation 11 minimum loading ripple/ noise 9 line/load regulation 7 ef?ciency 50% load % of v nom % of v out range/oc low esr <0.02 max., resistive load hiccup auto restart after fault removal max. (20 mhz bandwidth) % of v nom f v % of v out hph-3.3/70-d48 1 10 0.02 10,000 4 magnetic feedback +10 no minimum load see ordering guide hph-5/40-d48 1 10 0.02 10,000 6 hph-12/30-d48 1 10 0.02 10,000 14.5 isolation characteristics model family input to output input to baseplate baseplate to output isolation resistance isolation capacitance isolation safety rating current limit inception short circuit protection method short circuit current min. min. min. 98% of v out , after warmup continuous vvvmpf a a hph-3.3/70-d48 2250 1500 1500 100 2000 basic insulation 84 current limiting, hiccup autorestart 12 hph-5/40-d48 45 hiccup 17 hph-12/30-d48 37 6.6 see notes on page 5. 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?ca- tions may cause damage to the product. your production environment may differ; therefore please thoroughly review these guideli nes 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
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 5 of 12 dynamic characteristics dynamic load response, sec to 1% ?nal value, (50-75-50%, load step) hph-3.3/70-d48 150s hph-5/40-d48, hph-12/30-d48 200s start-up time, v in to v out hph-3.3/70-d48, hph-5/40-d48 10 ms hph-12/30-d48 15 ms max. remote on/off to v out regulated (max.) hph-3.3/70-d48, hph-5/40-d48 10 ms hph-12/30-d48 15 ms max. switching frequency hph-3.3/70-d48 450 khz hph-5/40-d48 440 khz hph-12/30-d48 440 khz calculated mtbf 1.2 m hours (hph-12/30-d48) operating temperature range -40 to +85oc, see derating curves storage temperature range -55 to +125oc thermal protection/shutdown 120oc relative humidity to +85oc/85%, non condensing pre-biased startup v out must be v set physical characteristics outline dimensions see mechanical specs baseplate material aluminum pin material copper alloy pin diameter 0.04/0.08" (1.016/2.032mm) pin finish nickel underplate with gold overplate weight hph-12/30-d48: 2.25 ounces (63.8g) all other models: 2 ounces (56.7g) electromagnetic interference (conducted and radiated) (may require external ?lter) designed to meet fcc part 15, class b, en5502 2 safety designed to meet ul/cul 60950-1, csa-c22.2 no.60950-1, iec/en 60950-1 absolute maximum ratings input voltage volts, min. -0.3v volts, max. continuous 75v continuous (100v/100ms, hph-12/30-d48) on/off control, referred to -v in volts, min. -0.3v volts, max. +15v input reverse polarity protection see fuse section output overvoltage, max. v out + 20% storage temperature min. -55oc max. 125oc [1] all speci?cations are typical unless noted. ambient temperature = +25 degrees celsius, vin is nominal (+48 volts), output current is maximum rated nominal. output capacitance is 1 f ceramic paralleled with 10 f electrolytic. input caps are 22 f except hph-3.3/70-d48 which is 100 f input. all caps are low esr. these capacitors are necessary for our test equipment and may not be needed in your application. testing must be kept short enough that the converter does not appreciably heat up during testing. for extended testing, use plenty of air?ow. see derating curves for temperature performance. all models are stable and regulate within spec without external cacacitance. [2] input ripple current is tested and speci?ed over a 5-20 mhz bandwidth and uses a special set of external ?lters only for the ripple current speci?cations. input ?ltering is cin = 33 f, cbus = 220 f, lbus = 12 h except hph-3.3/70-d48 is cin = 100f. use capacitor rated voltages which are twice the maximum expected voltage. capacitors must accept high speed ac switching currents. [3] note that maximum current derating curves indicate an average current at nominal input voltage. at higher temperatures and/or lower air?ow, the converter will tolerate brief full current outputs if the total rms current over time does not exceed the derating curve. [4] mean time before failure (mtbf) is calculated using the telcordia (belcore) sr-332 method 1, case 3, ground ?xed conditions. tpcboard = +25 c., full output load, natural air convection. [5] the output may be shorted to ground inde?nitely with no damage. 6] the on/off control is normally driven from a switch or relay. an open collector/open drain transistor may be used in saturation and cut-off (pinch-off) modes. external logic may also be used if voltage levels are fully compliant to the speci?cations. [7] regulation speci?cations describe the deviation as the input line voltage or output load current is varied from a nominal midpoint value to either extreme. [8] do not exceed maximum power ratings, sense limits or output overvoltage when adjusting output trim values. [9] at zero output current, vout may contain components which slightly exceed the ripple and noise speci?cations. [10] output overload protection is non-latching. when the output overload is removed, the output will automatically recover. [11] because of the high currents, wire the appropriate input, output and common pins in parallel groups. be sure to use adequate pc board etch. if not suf?cient, install additional discrete wiring. if wiring is not suf?cient, the sense feedback may attempt to drive the outputs beyond ratings. [12] the converter will shut off if the input falls below the undervoltage threshold. it will not restart until the input exceeds the input start up voltage. [13] please refer to the separate output capacitive load application note from murata power solutions. [14] output noise may be further reduced by installing an external ?lter. see the application notes. [15] to avoid damage or unplanned shutdown, avoid sinking reverse output current. [16] to protect against accidental input voltage polarity reversal, install a fuse in series with +vin. see fusing information. [17] hph-5/40-d48 full current hiccup is approximately 3% duty cycle, 0.8 hz pulse rate.
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 6 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 shut- down whose voltage decays as input current is consumed (such as capacitor inputs), the converter shuts off and then restarts as the external capacitor recharges. such situations could oscillate. to prevent this, make sure the oper- ating 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 as- sumes 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 reasonable in- put voltage regulation. since real-world voltage sources have ?nite impedance, application notes 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. in critical applications, output ripple and noise (also referred to as periodic and 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 random deviations or pard) may be reduced by adding ?lter elements such as multiple external capacitors. be sure to calculate component temperature 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 impedanc- es 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.
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 7 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 application 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 convec- tion, 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 un- derstand 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 approximately 125% to 150% of 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 somewhat constant power output. this is com- monly 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, figure 3 C 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
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 8 of 12 the pwm will restart, causing the output voltage to begin ramping up to its ap- propriate 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 C 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 out- put 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 C 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 C 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
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 9 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 left open or is pulled high to +vin with respect to Cvin. figure 7 C trim adjustments to decrease output voltage using a fixed resistor figure 8 C driving the positive polarity on/off control pin figure 9 C driving the negative polarity on/off control pin dynamic control of the on/off function should be able to sink appropriate sig- nal 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
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 10 of 12 figure 10 C transient response (25% load step) figure 11 C transient response (50% load step) figure 12 C enable start-up (v in =48v i out =0a) figure 13 C enable start-up (v in =48v i out =70a) figure 14 C ripple waveform (v in =48v i out =0a) figure 15 C ripple waveform (v in =48v i out =70a) transient response C model hph-3.3/70-d48 enable start-up C model hph-3.3/70-d48 ripple and noise (1uf ceramic plus 10uf tantalum) C model hph-3.3/70-d48
technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 11 of 12 typical performance curves 70 72 74 76 78 80 82 84 86 88 90 92 94 96 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 12 14 16 18 20 22 24 26 hph-5/40-d48 ef?ciency and power dissipation vs. load current @ +25oc ef?ciency (%) load current (amps) loss (watts) v in = 75v v in = 48v v in = 36v power dissipation @ v in = 48v 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 30 35 40 45 50 55 60 65 70 75 80 ambient temperature (oc) output current (a mps) hph-5/40-d48 maximum current temperature derating (v in =48v, air?ow is from v in to v out ) 100 lfm 200 lfm 300 lfm 400 lfm 10 15 20 25 30 35 40 45 50 55 60 65 70 75 30 35 40 45 50 55 60 65 70 75 80 100 lfm 200 lfm 300 lfm 400 lfm hph-3.3/70-d48 maximum current temperature derating (vin=48v, air?ow is from vin to vout, no baseplate) ambient temperature (oc) output current (amps) v in = 75 v v in = 50 v v in = 36 v 76 78 80 82 84 86 88 90 92 94 10 20 30 40 50 60 70 hph-3.3/70-d48 ef?ciency and power dissipation vs. load current @ +25oc ef?ciency (%) load current (amps) 0 10 20 30 40 50 60 70 80 30 35 40 45 50 55 60 65 70 75 80 100 lfm 200 lfm 300 lfm 400 lfm hph-3.3/70-d48 maximum current temperature derating (vin=48v, air?ow is from vin to vout, with baseplate) ambient temperature (oc) output current (amps)
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 chan ge without notice. ? 2009 murata power solutions, inc. usa: mans?eld (ma), tel: (508) 339-3000, email: sales@murata-ps.com canada: toronto, tel: (866) 740-1232, email: toronto@murata-ps.com uk: milton keynes, tel: +44 (0)1908 615232, email: mk@murata-ps.com france: montigny le bretonneux, tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com germany: mnchen, tel: +49 (0)89-544334-0, email: munich@murata-ps.com japan: tokyo, tel: 81-3-3779-1031, email: japan@murata-ps.com kyoto, tel: 81-75-955-7269, email: japan@murata-ps.com china: shanghai, tel: +86 215 027 3678, email: shanghai@murata-ps.com guangzhou, tel: +86 208 221 8066, email: guangzhou@murata-ps.com singapore: parkway centre, tel: +65 6348 9096, email: singapore@murata-ps.com murata power solutions, inc. 11 cabot boulevard, mans?eld, ma 02048-1151 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 and 14001 registered technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 www.murata-ps.com 07/24/09 hph series isolated, low v out to 70a, half-brick dc/dc converters mdc_hph_a15 page 12 of 12 typical performance curves, continued 70 75 80 85 90 95 100 3 6 9 12151821242730 0 8 16 24 32 40 48 hph-12/30-d48 ef?ciency and power dissipation vs. line voltage and load current @ +25oc ef?ciency (%) load current (amps) vin = 75v vin = 48v vin = 36v loss (watts) power dissipation @ vin = 48v 0 5 10 15 20 25 30 35 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature (oc) output current (a mps) hph-12/30-d48 maximum current temperature derating at sea level (vin = 48v, air?ow is from input to output, baseplate is installed) natural convection 100 lfm 200 lfm 300 lfm 400 lfm

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