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standard baseplate option flanged baseplate option sdc_IRS series.a01.d0 6 page 1 of 26 features ? ? high effciency synchronous fyback topology ? ? 18-75 volts dc wide input range with 3.3, 5 and 12 volts for output voltage ? ? up to 54 watts total output power with over - temperature shutdown ? ? tiny 1.44" x 1.04" x 0.50" baseplate package ? ? industry standard dosa "brick" format and pinout ? ? extensive self-protection shut down features ? ? small footprint dc-dc converter, ideal for high current applications ? ? 2250 volt basic input/output isolation ? ? operating temperature range -40 to +85 c with derating ? ? stable no-load operation with no required exter - nal components ? ? certifed to ul 60950-1, 2nd edition, en60950-1 safety approvals the world of brick dc-dc converters has seen a steady size reduction. the IRS series makes an - other dramatic size shrink down to a sixteenth- brick width (0.90 inches) while still retaining a high power output and full 2250 volt dc isolation. the converter family accepts 18?to 75 volts dc inputs and delivers fxed outputs regulated to within 0.125%. the IRS converters are ideal for industrial and railway applications, datacom and telecom applications, cell phone towers, data centers, server farms and network repeaters. IRS outputs may be trimmed while delivering fast settling to current step loads and no adverse effects from higher capacitive loads. excellent ripple and noise specifcations assure compatibility to circuits using cpus, asics, programmable logic and fpgas. no minimum load is required. for systems requiring controlled startup/shutdown, an external remote on/off control may use a switch, transistor or digital logic. many self-protection features on the IRS series avoid both converter and external circuit hazards. these include input undervoltage lockout and overtemperature shutdown. the output of these dc-dc converters have current limit using the hiccup autorestart technique and the outputs may be short-circuited indefnitely. additional features include output overvoltage and reverse conduction elimination. the synchronous fyback topology yields high effciency for minimal heat buildup and no fan operation. product overview typical units output voltage (v) output current (a) input voltage (v) 3.3 15 18-75 5 10 18-75 12 4.5 18-75 optimized for harsh environments in industrial/railway applications, the IRS dc-dc converter series offer regulated outputs in an industry-standard sixteen-brick fully encased package. safety features ? ? basic insulation ? ? 2250vdc input to output isolation ? ? ul 60950-1, 2 nd edition ? ? can/csa-c22.2 no. 60950-1 ? ? en 60950-1 ? ? rohs compliant www.murata-ps.com www.murata-ps.com/ support for full details go to www.murata-ps.com/rohs IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
part number structure *sense is included on the IRS-3.3/15-q48 and IRS-5/10-q48. examples: IRS-3.3/15-q48nf-c stands for industrial railway 1/16 brick, 3.3vout@15a, 18v-75vin, negative logic, flanged baseplate, rohs-6 compliant. IRS-12/4.5-q48p-c stands for industrial railway 1/16 brick, 12vout@4.5a, 18v-75vin, positive logic, standard baseplate, rohs-6 compliant. sdc_IRS series.a01.d0 6 page 2 of 26 maximum rated output current current in amps (a ) s = sixteenth brick industrial-railway s ir - / - 12 4.5 n on/off control logic: n = negative p = positive ? please refer to the part number structure when ordering. ? all specifcations are at nominal line voltage and full load, +25c unless otherwise noted. see detailed specifcations. output capacitors are 1 f ceramic multilayer in parallel with 10 f. i/o caps are necessary for our test equipment and may not be needed for your application. ? regulation specifcations describe output voltage deviations from a nominal/midpoint value to either extreme (50% load step). ? iout = 13a max. if vin < 36v. ? iout=8a max. if vin <36v. ? iout = 3.5a max. if vin < 36v. c rohs-6 compliant - input voltage range: q48 = 18C75 volts (48v nominal) nominal output voltage: voltage in volts (v) performance specifications summary and ordering guide ? root model ? output input efficiency package v out i out n ? v in n i in i in t t IRS-3.3/15-q48 3.3 15 ? 49.5 90 125 0.15% 0.3% 48 18-75 25 1.16 87.5% 89% 1.44 x 1.04 x 0.50 IRS-5/10-q48 5 10 ? 50 90 130 0.125% 0.125% 48 18-75 30 1.14 88% 91% 1.44 x 1.04 x 0.50 IRS-12/4.5-q48 12 4.5 ? 54 115 150 0.125% 0.125% 48 18-75 25 1.24 89% 91% 1.44 x 1.04 x 0.50 q48 f baseplate blank = standard baseplate f = flanged baseplate see mechanical drawings for details ? special quantity order is required. ? some model number combinations may not be available. see website or contact your local murata sales representative. www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 3 of 26 functional specifications, IRS-3.3/15-q48 absolute maximum ratings conditions [1] minimum typical/nominal maximum units input voltage, continuous full temperature range 0 75 vdc input voltage, transient operating or non-operating, 100 ms max. duration 100 vdc isolation voltage input to output tested 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on or off, referred to -vin 0 15 vdc output power 0 49.5 50 w output current current-limited, no damage, short-circuit protected 0 15 15 a 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-term reliability. proper operation under conditions other than those listed in the performance/functional specifcations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 7 a start-up threshold rising input voltage 16 17 17.9 vdc undervoltage lockout [9] falling input voltage 15 16.25 17.50 vdc overvoltage shutdown rising input voltage none vdc reverse polarity protection [11] none, install external fuse none vdc internal filter type lc input current full load conditions vin = nominal 1.16 1.19 a low line vin = minimum, 13a load 2.63 2.72 a inrush transient 0.4 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 25 60 ma shut-down mode input current (off, uv, ot) 5 10 ma refected (back) ripple current [2] measured at input with specifed flter 15 30 ma, pk-pk pre-biased startup external output voltage < vset monotonic general and safety effciency vin=48v, full load 87.5 89 % vin=24v, full load 88.5 90.5 % isolation isolation voltage, input to output 2250 vdc isolation voltage, input to baseplate 1500 vdc isolation voltage, baseplate to output 1500 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1300 pf safety certifed to ul-60950-1, iec/en60950-1, 2nd edition yes calculated mtbf [3] belcore, telcordia sr-332, method 1, class 3, ground fxed, tcase=25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 250 280 310 khz power up startup time power on to vout regulated 30 ms on/off startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 100 200 sec dynamic load peak deviation same as above, 180 240 mv features and options remote on/off control [4] "n" suffx negative logic, on state on=pin grounded or external voltage -0.1 0.8 vdc negative logic, off state off=pin open or external voltage 2.5 15 vdc control current open collector/drain, sourcing 1 2 ma "p" suffx positive logic, on state on=pin open or external voltage 10 15 vdc www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 4 of 26 positive logic, off state off=ground pin or external voltage 0 0.7 vdc control current open collector/drain 1 2 ma output conditions [1] minimum typical/nominal maximum units total output power see derating 0.0 49.5 50 w voltage nominal output voltage no trim 3.267 3.3 3.333 vdc setting accuracy at 50% load 1 % of vnom. output voltage range [6] user-adjustable -10 10 % of vnom. overvoltage protection [8] via magnetic feedback 4 4.3 4.9 vdc current output current range vin=18v-36v 0.0 13.0 a output current range vin=36v-75v 0.0 15.0 a minimum load no minimum load current limit inception 98% of vnom., after warmup 18.4 21.9 25.4 a short circuit short circuit current hiccup technique, autorecovery within 1.25% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation [5] line regulation vin=min. to max., vout=nom., full load 0.15 % load regulation iout=min. to max., vin=48v 0.3 % ripple and noise [7][10] with a 1uf || 10uf output caps 90 125 mv pk-pk with a 1uf || 100uf output caps 60 mv pk-pk temperature coeffcient at all outputs 0.02 % of vnom./c remote sense compensation [12] sense connected at load 10 % of vout maximum capacitive load constant resistance mode , low esr 0 10,000 f mechanical outline dimensions standard basplate 1.44 x 1.04 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 26.31 x 12.7 mm outline dimensions flanged basplate 1.44 x 1.5 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 38.1 x 12.7 mm weight 0.58 ounces 16.4 grams through hole pin diameter 0.06 & 0.04 inches 1.524 & 1.016 mm through hole pin material copper alloy emi/rfi shielding none environmental operating ambient temperature range see derating, full power, natural convection -40 85 c operating case temperature range no derating, full power, natural convection -40 105 c storage temperature vin = zero (no power) -55 125 c thermal protection/shutdown measured in center 115 125 130 c electromagnetic interference external flter is required conducted, en55022/cispr22 b class rohs rating [4] rohs-6 functional specifications, IRS-3.3/15-q48 (cont.) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 5 of 26 typical performance data, IRS-3.3/15-q48 0.8 1.8 2.8 3.8 4.8 5.9 6.9 7.9 8.9 9.9 10.9 12.0 13.0 14.0 15.0 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 vin = 36v vin = 75v vin = 18v vin = 24v l o a d current ( a) e f ? c i e n c y ( % ) maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) power dissipation vs. load current @ 25 c maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) effciency vs. line voltage and load current @ 25 c 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 0.8 1.8 2.8 3.8 4.8 5.9 6.9 7.9 8.9 9.9 10.9 12.0 13.0 14.0 15.0 vin = 48v vin = 75v vin = 18v vin = 24v l o a d current ( a ) power dissipation (w) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 6 of 26 typical performance data, IRS-3.3/15-q48 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 9 5 1 0 0 1 0 5 o u t p u t c u rre n t ( % o f n omi n a l ) b a sep l a t e t e m p e r a t u r e i n d e g r ees c e l s i u s output ripple and noise (vin=48v, vout=nom., iout=no load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=15a, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) on/off enable delay (vin=48v, vout=nom., iout=15a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=10,000 f, ta=+25c., scopebw=20mhz) step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) thermal derating vs. baseplate temperature www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 7 of 26 functional specifications, IRS-5/10-q48 absolute maximum ratings conditions [1] minimum typical/nominal maximum units input voltage, continuous full temperature range 0 75 vdc input voltage, transient operating or non-operating, tested: 100 ms max. duration 0 100 vdc isolation voltage input to output 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on, referred to -vin 0 15 vdc output power 0 50 50.63 w output current current-limited, no damage, short-circuit protected 0 10 10 a 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-term reliability. proper operation under conditions other than those listed in the performance/functional specifcations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 5 a start-up threshold, turn on rising input voltage 16 17.5 17.9 vdc undervoltage shutdown, turn off [9] falling input voltage 15 16.75 17.5 vdc overvoltage shutdown na vdc reverse polarity protection [11] none, install external fuse none vdc internal filter type lc input current full load conditions vin = nominal 1.14 1.2 a low line vin = minimum 2.44 2.51 a inrush transient 0.4 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 30 60 ma shut-down mode input current 5 10 ma refected (back) ripple current [2] no fltering 150 200 map-p refected (back) ripple current [2] measured at input with specifed flter 15 30 map-p pre-biased startup external output voltage < vset monotonic general and safety effciency vin=48v, full load 88 91 % vin=24v, full load 89.5 91 % isolation isolation voltage, input to output 2250 vdc isolation voltage, input to baseplate 1500 vdc isolation voltage, baseplate to output 1500 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1000 pf safety (meets the following requirements) ul-60950-1, csa-c22.2 no.60950-1, iec/en60950-1, 2nd edition yes calculated mtbf [3] belcore, telcordia sr-332, method 1, class 3, ground fxed, tambient=25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 225 275 325 khz startup time power on to vout regulated 30 ms startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 100 200 sec dynamic load peak deviation same as above, 180 240 mv features and options remote on/off control [4] "n" suffx negative logic, on state on = pin grounded or external voltage -0.1 0.8 v negative logic, off state off = pin open or external voltage 2.5 15 v control current open collector/drain 1 2 ma "p" suffx positive logic, on state on = pin open or external voltage 10 15 v positive logic, off state off = ground pin or external voltage 0 0.7 v control current open collector/drain 1 2 ma www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 8 of 26 output conditions [1] minimum typical/nominal maximum units total output power see derating 0.0 50 50.63 w voltage nominal output voltage no trim 4.938 5 5.063 vdc setting accuracy at 50% load -1.25 1.25 % of vset output voltage range [6] user-adjustable -20 10 overvoltage protection [8] via magnetic feedback 6.2 6.4 6.6 vdc current output current range vin=18v to 36v 0 8 output current range vin=36v to 75v 0 10 a minimum load no minimum load current limit inception 98% of vnom., cold condition 12 14 16.5 a short circuit short circuit current hiccup technique, autorecovery within 1.25% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation [5] line regulation vin=min. to max., vout=nom., nom load 0.125 v load regulation iout=min. to max 0.125 v ripple and noise [7][10] with a 1uf || 10 uf output caps. 90 130 mv pk-pk with a 1uf || 100uf tantalum output caps 65 mv pk-pk temperature coeffcient at all outputs 0.02 % of vout./c remote sense compensation [12] sense connected at load 10 % of vout maximum capacitive loading (10% ceramic, 90% oscon) constant resistance mode , low esr 0 5000 f mechanical outline dimensions standard basplate 1.44 x 1.04 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 26.31 x 12.7 mm outline dimensions flanged basplate 1.44 x 1.5 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 38.1 x 12.7 mm weight 0.58 ounces 16.4 grams through hole pin diameter diameter of pins standard 0.06 & 0.04 inches 1.524 & 1.016 mm through hole pin material gold-plated copper alloy with nickel underplate th pin plating metal and thickness nickel subplate 50 -inches gold overplate 5 -inches emi/rfi shielding none environmental operating ambient temperature range see derating curves -40 85 c storage temperature vin = zero (no power) -55 125 c operating case temp no derating required -40 105 c thermal protection/shutdown measured at hotspot 115 125 130 c electromagnetic interference external flter is required conducted, en55022/cispr22 b class rohs rating [4] rohs-6 functional specifications, IRS-5/10-q48 (cont.) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 9 of 26 typical performance data, IRS-5/10-q48 maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) s in ) effciency vs. line voltage and load current @ 25 c C vin = 36v-75v effciency vs. line voltage and load current @ 25 c C vin = 18v-36v 60 65 70 75 80 85 90 95 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 vin = 60v vin = 75v vin = 36v vin = 48v l o a d current ( a ) e f ? c i e n c y ( % ) 0 1 2 3 4 5 6 7 8 9 10 11 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 5 6 7 8 9 10 11 12 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 5 6 7 8 9 10 11 12 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 5 6 7 8 9 10 11 12 40 45 50 55 60 65 70 75 80 85 output load current(amps ) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 72 74 76 78 82 84 80 86 88 90 92 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 vin = 36v vin = 18v vin = 24v l o a d current ( a ) e f f i c i e n c y ( % ) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 10 of 26 typical performance data, IRS-5/10-q48 power on starup delay (vin=0 to 48v, vout=nom, iout=10a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout power on starup delay (vin=0 to 48v, vout=nom, iout=0a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout on/off enable delay (vin=48v, vout=nom, iout=10a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 11 of 26 typical performance data, IRS-5/10-q48 output ripple and noise (vin=48v, vout=nom., iout=10a, cload=1 ufceramic || 10uf tantulum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=0a, cload=1 ufceramic || 10uf tantu - lum, ta=+25c., scopebw=20mhz) step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1 uf ceramic || 10uf tantalum, ta=+25c., scopebw=20mhz ch1=5vo, ch2=io 2amps\div) step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=680uf, ta=+25c., scopebw=20mhz ch1=5vo, ch2=io 2amps\div) thermal derating vs. baseplate temperature 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 9 5 1 0 0 1 0 5 o u t p u t c u rre n t ( % o f n omi n a l ) b a sep l a t e t e m p e r a t u r e i n d e g r ees c e l s i u s www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 12 of 26 functional specifications , IRS-12/4.5-q48 absolute maximum ratings conditions [1] minimum typical/nominal maximum units input voltage, continuous full temperature range 0 75 vdc input voltage, transient operating or non-operating, 100 ms max. duration 0 100 vdc isolation voltage input to output tested 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on or off, referred to -vin 0 15 vdc output power 0 54 54.54 w output current current-limited, no damage, short-circuit protected 0 4.5 4.5 a 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-term reliability. proper operation under conditions other than those listed in the performance/functional specifcations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 6 a start-up threshold rising input voltage 16.5 17.2 17.9 vdc undervoltage lockout [9] falling input voltage 15 16.5 17.50 vdc overvoltage shutdown rising input voltage none vdc reverse polarity protection [11] none, install external fuse none vdc internal filter type capacitive input current full load conditions vin = nominal 1.24 1.28 a low line vin = minimum , 3.5a load 2.55 2.63 a inrush transient 0.05 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 25 60 ma shut-down mode input currrent (off, uv, ot) 5 10 ma refected (back) ripple current [2] measured at input with specifed flter 30 40 ma, pk-pk pre-biased startup external output voltage < vset monotonic general and safety effciency vin=48v, full load 89 91 % vin=24v, full load 89.5 91.5 % isolation isolation voltage, input to output 2250 vdc isolation voltage, input to baseplate 1500 vdc isolation voltage, baseplate to output 1500 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1000 pf safety (designed to meet the following require - ments) ul-60950-1, iec/en60950-1, 2nd edition yes calculated mtbf [3] per telcordia sr-332, method 1, class 3, ground fxed, tambient=25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 200 230 260 khz power up startup time power on to vout regulated 30 ms on/off startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 250 300 sec dynamic load peak deviation same as above, 350 400 mv features and options remote on/off control [4] "n" suffx negative logic, on state on=pin grounded or external voltage -0.1 0.8 vdc negative logic, off state off=pin open or external voltage 2.5 15 vdc control current open collector/drain, sourcing 1 2 ma "p" suffx positive logic, on state on=pin open or external voltage 10 15 vdc positive logic, off state off=pin grounded or external voltage 0 0.7 vdc www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 13 of 26 control current open collector/drain, sinking 1 2 ma output conditions [1] minimum typical/nominal maximum units total output power see derating 0 54 54.54 w voltage nominal output voltage no trim 11.88 12 12.12 vdc setting accuracy at 50% load 1 % of vnom. output voltage range [6] user-adjustable -20 10 % of vnom. overvoltage protection [8] via magnetic feedback 13.3 15.3 18 vdc current output current range vin=18v-36v 0 3.5 a output current range vin=36v-75v 0 4.5 a minimum load no minimum load current limit inception 98% of vnom., after warmup 5.05 6.4 7.4 a short circuit short circuit current hiccup technique, autorecovery within 1.25% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation [5] line regulation vin=min. to max., vout=nom., full load 0.125 % load regulation iout=min. to max., vin=48v 0.125 % ripple and noise [7][10] with a 1uf || 10uf output caps 115 150 mv pk-pk temperature coeffcient at all outputs 0.02 % of vnom./c maximum capacitive load constant resistance mode , low esr 0 2200 f mechanical outline dimensions standard basplate 1.44 x 1.04 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 26.31 x 12.7 mm outline dimensions flanged basplate 1.44 x 1.5 x 0.5 inches (please refer to outline drawing) l x w x h 36.47 x 38.1 x 12.7 mm weight 0.58 ounces 16.4 grams through hole pin diameter 0.06 & 0.04 inches 1.524 & 1.016 mm through hole pin material copper alloy th pin plating metal and thickness nickel subplate 50 -inches gold overplate 5 -inches emi/rfi shielding none environmental operating ambient temperature range no derating, full power, natural convection -40 85 c operating case temperature range no derating, full power, natural convection -40 105 c storage temperature vin = zero (no power) -55 125 c thermal protection/shutdown measured in center 115 125 130 c electromagnetic interference external flter is required conducted, en55022/cispr22 b class rohs rating [4] rohs-6 functional specifications, IRS-12/4.5-q48 (cont.) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 14 of 26 typical performance data, IRS-12/4.5-q48 effciency vs. line voltage and load current @ 25 c maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) power dissipation vs. load current @ 25 c maximum current temperature derating at sea level (v in ) maximum current temperature derating at sea level (v in ) 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 load current (a) e f f i c i e n c y (%) vin = 18v vin = 24v vin = 48v vin = 75v 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 load current (a) power dissipation (w) vin = 18v vin = 24v vin = 48v vin = 75v 0 1 2 3 4 5 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm 0 1 2 3 4 5 40 45 50 55 60 65 70 75 80 85 output load current(amps) ambient temperature in degrees celsius 600lfm 500lfm 400lfm 300lfm 200lfm 100lfm www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 15 of 26 typical performance data, IRS-12/4.5-q48 output ripple and noise (vin=48v, vout=nom., iout=no load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=4.5a, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) on/off enable delay (vin=48v, vout=nom., iout=no load, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout on/off enable delay (vin=48v, vout=nom., iout=4.5a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 16 of 26 typical performance data, IRS-12/4.5-q48 power on startup delay (vin=0 to 48v, vout=nom., iout=no load, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout power on startup delay (vin=0 to 48v, vout=nom., iout=4.5a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout thermal derating vs. baseplate temperature 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5 9 0 9 5 1 0 0 1 0 5 o u t p u t c u rre n t ( % o f n omi n a l ) b a sep l a t e t e m p e r a t u r e i n d e g r ees c e l s i u s www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 17 of 26 performance specifcation notes 1. all specifcations are typical unless noted. ambient temperature = +25celsius, v in s s i i in bus bus u b b) b) s i ) ) i i s u s n u and no more . larger caps (especially low-esr ceramic types) may slow transient response or degrade dynamic performance. thoroughly test your applica - tion with all components installed. 11. if reverse polarity is accidentally applied to the input, to ensure reverse input protection with full output load, always connect an external fast blow input fuse in series with the +v in i s is is www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
standards compliance parameter notes en 60950-1/a12:2011 basic insulation ul 60950-1/r:2011-12 can/csa-c22.2 no. 60950-1/a1:2011 iec 61000-4-2 esd test, 8 kv - np, 15 kv air - np (normal performance) note: an external input fuse must always be used to meet these safety requirements. parameter #units test conditions vibration 15 en 61373:1999 category i, class b, body mounted mechanical shock 15 en 61373:1999 category i, class b, body mounted dmtbf(life test) 60 vin nom , units at derating point,101days temperature cycling test( tct) 15 -40 c to 125 c, unit temp. ramp 15 c/min.,500cycles power and temperature cycling test (ptct) 5 temperature operating = min to max, vin = min to max, load=50% of rated maximum,100cycles temperature ,humidity and bias(thb) 15 85 c85rh,vin=max, load=min load,1072hour(72hours with a pre-conditioning soak, unpowered) damp heat test, cyclic 15 en60068-2-30: temperatures: + 55 c and + 25 c; number of cycles: 2 (respiration effect); time: 2 x 24 hours; relative humidity: 95% dry heat test 5 en60068-2-2, vin=nom line, full load, 85c for 6 hours. high temperature operating bias(htob) 15 vin=min to max ,95% rated load, units at derating point,500hours low temperature operating 5 vin=nom line, full load,-40c for 2 hours. highly accelerated life test(halt) 5 high temperature limits, low temperature limits, vibration limits, combined environmental tests. emi 3 class a in cisspr 22 or iec62236-3-2(gb/t 24338.4) esd 3 iec 6100-4-2: +/-8kv contact discharge /+/-15kv air discharge surge protection 3 en50121-3-2 environmental qualification testing note: governing standard bs en 50155:2007 railway applications - electronics equipment used on rolling stock. sdc_IRS series.a01.d0 6 page 18 of 26 www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
mechanical specifications (standard baseplate option) sdc_IRS series.a01.d0 6 page 19 of 26 input/output connections p75 pin function pin function 3 Cvin 4 Cvout 5 Csense* 2 on/off control 6 output trim 7 +sense* 1 +vin 8 +vout * sense is included only on models IRS-3.3/15-q48 and IRS-5/10-q48. sense pins are omitted on other models. note that some competitive units may use different pin numbering or alternate outline views. however, all units are pinout compatible. it is recommended that no parts be placed beneath the converter. notes: unless otherwise specified; 1: all dimension are in inches[milimeter]; 2: the gap (max.0.1mm) after potting baking be - tween al case and plastic cover is acceptable; 3: for cosmetic specification and production workmanship standard, pls follow the file no.60887; 4: all tolerances: .in, 0.02in(.mm, 0.5mm) .in, 0.01in(.mm, 0.25mm) third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only and may vary between units. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? material: ? .040 pins: copper alloy ? .062 pins: copper alloy finish: (all pins) gold (5u"min) over nickel (50u" min) 0.600 15.24 0.300 7.62 0.600 15.24 c l 0.300 7.62 0.50 12.7 0.060 1.52 @ pin 4,8 0.040 1.02 @ pin 1-3;5-7 0.015 0.38 1.100 27.94 0.145 3.68 1.436 0.02 36.47 0.508 1.036 0.02 26.31 0.508 r0.060 1.52 4x 1 3 2 4 5 6 7 8 bottom view side view top view www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
mechanical specifications (flanged baseplate option) sdc_IRS series.a01.d0 6 page 20 of 26 0.600 15.24 0.300 7.62 0.600 15.24 1.12 28.4 c l 0.300 7.62 0.060 1.52 @ pin 4,8 0.040 1.02 @ pin 1-3;5-7 0.015 0.38 0.50 12.7 1.100 27.94 0.145 3.68 1.040 26.42 1.44 0.02 36.47 0.508 0.730 18.54 1.300 33.02 1.50 38.1 0.130 3.30 r0.062 1.57 4x r0.070 1.78 3x 0.10"x0.10" 1 3 2 4 5 6 7 8 bottom view side view top view input/output connections p75 pin function pin function 3 Cvin 4 Cvout 5 Csense* 2 on/off control 6 output trim 7 +sense* 1 +vin 8 +vout * sense is included only on models IRS-3.3/15-q48 and IRS-5/10-q48. sense pins are omitted on other models. note that some competitive units may use different pin numbering or alternate outline views. however, all units are pinout compatible. it is recommended that no parts be placed beneath the converter. third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only and may vary between units. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? material: ? .040 pins: copper alloy ? .062 pins: copper alloy finish: (all pins) gold (5u"min) over nickel (50u" min) notes: unless otherwise specified; 1: all dimension are in inches[milimeter]; 2:the gap (max.0.1mm) after potting baking be - tween al case and plastic cover is ac ceptable; 3: for cosmetic specification and production workmanship standard, pls follow the file no.60887; 4: all tolerances: .in, 0.02in(.mm, 0.5mm) .in, 0.01in(.mm, 0.25mm) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
mechanical specifications input/output connections p75 pin function pin function 3 Cvin 4 Cvout 5 Csense* 2 on/off control 6 output trim 7 +sense* 1 +vin 8 +vout .92 23.4 .100 m i n a nnular ring for all pin s houlders .300 7.62 .300 7.62 1.100 33.5 1.32 11.7 .46 14.0 .55 3.81 .150 3.81 .150 recommend ed f ootprint (v iew through conv erter) 1 2 3 4 8 c l fin ished hole sizes @ pins 4 & 8 (per i p c-d -275, lev e l c ) .070-.084 (sec) c l (pri) c l top view fi n ished hole sizes @ pins 1-3, 6, 5*, 7* (pe r i pc-d-275, l e v e l c ) .048-.062 5 * 7 * 6 *sense is included only on models IRS-3.3/15-q48. sense pins are omitted on other models. sdc_IRS series.a01.d0 6 page 21 of 26 www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
shipping trays and boxes, through-hole mount shipping tray dimensions material: low density, closed cell polyethylene anti-static foam third angle projection dimensions are in milimeters. tolerances (unless otherwise speci?ed): .xx 0.5 .xxx 0.25 angles 2? sdc_IRS series.a01.d0 6 page 22 of 26 input end of converters (all 0.04?? pins) output end of converters (0.06?? pins with or without addtional 0.04?? pins) 48 units per carton each tray is 4x6 units (24 units total per tray) anti-static foam 2.75 ref 10.50 ref 11.25 ref front ap shall be sealed with esd tape specied or equivalent after the box is closed label, paper label esd warning label, paper 36.0 26.0 6.0 r8 40.0 252.0 62.0 13.0 238 13 36.0 62.0 r8 252.0 6.35 depth 13mm 7.62 7.62 b b 7 x 7 5.0 13.0 24.0 section b-b scale 1 : 3 www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 23 of 26 transient and surge protection the input range of the IRS q48 modules cover en50155 requirements for brownout and transient conditions with nominal input voltages of 37.5v &48vdc. en50155 standard nominal input permanent input range (0.7 - 1.25 vin) brownout 100ms (0.6 x vin) transient 1s (1.4 x vin) 37.5v 26 - 47v 22.5v 52.5v 48v 33.6 - 60v 28.8v 67.2v i/o filtering, input ripple current, and output noise all models in the IRS series are tested/specifed for input refected ripple cur - rent and output noise using the specifed external input/output components/ circuits and layout as shown in the following two fgures. external input capaci - tors (c in in figure 2) serve primarily as energy-storage elements, minimiz - ing 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. in critical applications, output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below specifed limits using fltering 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 voltage and source impedance, as well as particular load and layout conditions. 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 murata power solutions IRS series dc-dc converters, we recommend the use of a fast blow fuse, installed in the ungrounded input supply line 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 converters must be installed in compliance with the requirements of the end use safety standard, i.e. iec/en/ul60950-1. 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 specified accuracy band. actual measured times will vary with input source impedance, external input capacitance, and the slew rate and fnal value of the input voltage as it appears at the converter. the IRS series implements a soft start circuit to limit the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off control to v out start-up time assumes the converter has its nominal input voltage applied but is turned off via the on/off control pin. the 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 IRS 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. c in v in c bus l bus c in = 33f, esr < 700m @ 100khz c bus = 220f, esr < 100m @ 100khz l bus = 12h +vin ?vin current probe to oscilloscope + ? figure 2. measuring input ripple current technical notes www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 24 of 26 current limiting as soon as the output current increases to approximately 130% of its rated value, the dc-dc converter will go into a current-limiting mode. in this condition, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. this is commonly referred to as power limiting. current limit inception is 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. remote sense (models IRS-3.3/15-q48 and IRS-5/10-q48 only) 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. IRS 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)] 10%v out in cables and discrete wiring applications, twisted pair or other techniques should be used. output over-voltage protection is monitored at the output voltage pin, not the sense pin. therefore, excessive voltage differences between v out and sense in conjunction with trim adjustment of the output voltage can cause the over-voltage protection circuitry to activate (see performance specifcations for over-voltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the 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 load +vout +vin sense current contact and pcb resistance losses due to ir drops contact and pcb resistance losses due to ir drops sense return ?vin on/off control trim +sense ?vout ?sense i out return i out figure 4. remote sense circuit confguration sense is included only on models IRS-3.3/15-q48 and IRS-5/10-q48. floating outputs since these are isolated dc-dc converters, their outputs are foating with respect to their input. designers will normally use the Coutput as the ground/ return of the load circuit. you can however, use the +output as ground/return to effectively reverse the output polarity. minimum output loading requirements IRS 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 IRS 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 IRS output voltage is monitored for an over-voltage condition using a comparator. the signal is optically coupled to the primary side and if the output voltage rises to a level which could be damaging to the load, the sensing circuitry will power down the pwm controller causing the output 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. 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 to their appropriate 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 IRS series is capable of enduring an indefnite short circuit output condition. c1 c1 = 1f c2 = 10f load 2-3 inches (51-76mm) from module c2 r load scope +vout ?vout +sense ?sense figure 3. measuring output ripple/noise (pard) www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters
sdc_IRS series.a01.d0 6 page 25 of 26 output voltage adjustment down r t (k?) = where ?% = |( 100 ) | ? 10.22 ?% 511 trim down trim equations trim up up rt (k ?) = ? 1.225 ?% 5.11 v nom (100 + ?%) ?% 511 ? 10.22 v nom ? v des v nom note: ? ?%? is always a positive value. ?v nom ? is the nominal, rated output voltage. ?v des ? is the desired, changed output voltage. figure 6. trim connections to increase output voltages load r trim up +vout +vin ?vin on/off control trim +sense ?vout ?sense load r trim down +vout +vin ?vin on/off control trim +sense ?vout ?sense figure 7. trim connections to decrease output voltages sense is included on IRS-3.3/15-d48 and IRS-5/10-q48. connect trim to the respective vout pin if sense is not installed. + vcc 13v circuit 5v circuit ?vin o n /o f f c o n tr o l + vin figure 5. driving the negative logic on/off control pin (simplifed circuit) on/off control the input-side, remote on/off control function can be ordered to operate with either logic type: positive ("p" suffx) logic models are enabled when the on/off pin is left open or is pulled high (see specifcations) with respect to the Cinput as per figure 4. positive-logic devices are disabled when the on/off pin is pulled low with respect to the Cinput. negative (n suffx) logic devices are off when the on/off pin is left open or is pulled high (see specifcations), and on when the pin is pulled low with respect to the Cinput. see specifcations. 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 ap - propriate 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. www.murata-ps.com/ support IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated 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 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. ? 2018 murata power solutions, inc. this product is subject to the following operating requirements and the life and safety critical application sales policy : refer to: http://www.murata-ps.com/requirements/ sdc_IRS series.a01.d0 6 page 26 of 26 through-hole soldering guidelines murata power solutions recommends the th soldering specifcations below when install - ing these converters. these specifcations vary depending on the solder type. exceeding these specifcations 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: maximum preheat temperature 115 c. maximum pot temperature 270 c. maximum solder dwell time 7 seconds for sn/pb based solders: maximum preheat temperature 105 c. maximum pot temperature 250 c. maximum solder dwell time 6 seconds figure 8. vertical wind tunnel ir video camera ir transparent optical window variable speed fan heating element ambient temperature sensor air?ow collimator precision low-rate anemometer 3? below uut unit under test (uut) vertical wind tunnel murata power solutions employs a computer controlled custom- designed closed loop vertical wind tunnel, infrared video camera sys - tem, and test instrumentation for accurate airfow and heat dissipa - tion analysis of power products. the system includes a precision low fow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. the ir camera monitors the thermal performance of the unit under test (uut) under static steady-state conditions. a special optical port is used which is transparent to infrared wavelengths. both through-hole and surface mount converters are soldered down to a 10" x 10" host carrier board for realistic heat absorption and spreading. both longitudinal and transverse airfow studies are possible by rotation of this carrier board since there are often signif - cant differences in the heat dissipation in the two airfow directions. the combination of adjustable airfow, adjustable ambient heat, and adjustable input/output currents and voltages mean that a very wide range of measurement conditions can be studied. the collimator reduces the amount of turbulence adjacent to the uut by minimizing airfow turbulence. such turbulence infuences the effective heat transfer characteristics and gives false readings. excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. both sides of the uut are studied since there are different thermal gradients on each side. the adjustable heating element and fan, built-in temperature gauges, and no-contact ir camera mean that power supplies are tested in real-world conditions. www.murata-ps.com/ support murata power solutions, inc. 129 flanders rd, westborough, ma 01581 usa iso 9001 and 14001 registered IRS series encapsulated sixteenth-brick dosa-compatible, wide input isolated dc-dc converters

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