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(888) 597-wall www.wallindustries.com 1 of 14 technical datasheet rev. c FA12S5-300 300w dc-dc converter 10-36 vdc input 5vdc output at 60a full-brick package features: ? 88% efficient at full load ? 90% efficiency at 1/2 load ? fast transient response ? operation to no load ? output trim 10% ? remote on/off (active high/low) ? remote sense compensation ? delivers a continuous 150w at 25c with no air / no heatsink ? very low output ripple ? fixed switching frequency ? output over current foldback ? output short circuit protection ? over temperature protection ? 1500 v isolation ? 100% burn in ? synchronizable description: the fa series is a high-density full brick converte r that incorporates the desired features required in today?s demanding low voltage bus applications. its unique dual interleaved phase-shifted topology minimizes both input and output noise. when perf ormance, reliability, and low cost are needed, the fa series delivers.
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 2 of 14 technical specifications m m o o d d e e l l n n o o . . FA12S5-300 all specifications are based on 25c, nominal input volta ge, and maximum output current unless otherwise noted. we reserve the right to change specifi cations based on technological advances. specification related condition min nom max unit switching frequency - 600 - khz input (v in ) operating voltage range 10 12 36 vdc uvlo turn on at 9.5 9.7 10 vdc uvlo turn off at 9.0 9.25 9.5 vdc uvlo hysterisis - 0.5 - vdc maximum input current (graph 3) low line - 35.7 - a no load input current (graph 3) no load - 0.10 - a input current under ?remote off? - 1 - ma reflected ripple current with l-c filter as shown in fig. 7. - 20 - ma input surge voltage 100 ms - - 50 vdc efficiency (graph 1) io=60a - 86 - % output (v o ) voltage set point sense shorted to vout 4.95 -1% 5.00 5.05 +1% vdc % voltage adjustment (table1) max output limited to 300w 4.5 -10% 5.5 +10% vdc load regulation sense shorted to vout - 0.05 0.2 % line regulation sense shorted to vout - 0.05 0.2 % temperature drift - 0.01 0.02 % / c remote sense compensation max output limited to 300w (max. drop in each + and ? output trace) - - 1 vdc ripple (photo4,5,6) 0.1f ceramic & 10f tantalum - 50 50 mv p-p spikes (photo 4,5,6) 0.1f ceramic & 10f tantalum - 50 50 mv p-p current rated maximum output current 0 - 60 a current limit power limited-dependent upon sense compensation and trim adjustment - 78 - a over voltage limit 6.0 6.5 7.0 vdc dynamic response load step / ? v (photo7) 50% to 100% io - 1 - v recovery time (photo 7) recovery to within 1% nominal vout - 0.4 - ms turn on delay (photo 1) from vin (min) to vout (nom) - 70 - ms turn on overshoot (photo 1,2) full load resistive - 0.0 - % hold up time (photo 3) 0 - - ms remote on/off active high or active low (see page 14 for ordering details) remote on ? positive logic ttl high or open-circuit 2.5 - 5.0 vdc remote off ? positive logic ttl low - - 2.0 vdc remote on pin floating - positive logic over operating voltage range 4.4 - 5.0 vdc i on/off sink current - positive logic v on/off =0v, vin=75v - - 1.0 ma remote on ? negative logic max low to enable - - 2.0 vdc remote off ? negative logic min high to disable 2.5 - 5.0 vdc remote on/off pin floating ? negative logic over operating voltage range 4.4 - 4.7 i on/off sink to pull low ? negative logic v on/off =0v, vin=75v - - 1 ma i on/off source to drive high ? active high or low - - 1 a turn on delay ? (photo 2) enabled - 40 - ms turn off delay ? (photo 3) disabled - - 10 s isolation input-output 1 minute 1500 - - vdc isolation resistance 1 - - g ? isolation capacitance - 0.010 - f thermal ambient (graph 2) max. ambient limited by derating curves (graph 2) -40 25 graph 2 c over temperature protection self resetting - 110 - c storage temperature ambient -55 - 125 c mtbf calculated using bellcore tr-332 method 1 case 3 2,212,456 hours mechanical see figure 1 weight - 318 - g
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 3 of 14 figure 1: mechanical dimensions unit: inches [mm] see note-1&3 standoffs only pin length from .20 min [5.1 min] to standoffs only . 0 0 0 [ 0 . 0 0 ] heatsink supplied attached with thermal interface material. heatsink has .005 ?.120 0.13 ?3.05 thru hole 6x .02 [0.4] 6x ref cover to standoff .84.04 [21.31.0] 2 1 serial no: date code m o d e l n a m e x x x x e x e t e r , n h 0 3 8 3 3 d c / d c c o n v e r t e r w a l l i n d u s t r i e s r label nonmetallic insulator 2x .015 [0.38] see note-1&3 standoffs only pin length from .20 min [5.1 min] to standoffs only + . 0 2 - . 0 3 2 . 4 0 6 1 . 0 - 0 . 8 + 0 . 5 3 4 5 7 8 9 6 .000 [0.00] .400 [10.16] .700 [17.78] 1.000 [25.40] 1.400 [35.56] 1.800 [45.72] 3.600 [91.44] . 3 0 [ 7 . 6 ] . 0 0 0 [ 0 . 0 0 ] 4.200 [106.68] 2 . 1 0 0 [ 5 3 . 3 4 ] .35 [8.9] .50 [12.7] . 2 0 . 0 3 [ 5 . 1 0 . 8 ] +.03 .50 -.00 -0.0 +0.8 12.7 117.0 +.02 4.60 -.03 +0.5 -0.8 see note-4 dot denotes pin-1 .02 [0.4] 6x ref cover to standoff +.02 .30 -.03 -0.6 +0.5 7.6 notes: 1. pin to pin tolerance .01 [0.3], pin diameter tolerance: .005 [0.13]. 2. case material: .040 [1.02] thick, al uminum alloy 3003-0, per: qqa 250/2. 3. unless otherwise specified. to order: 4. unit comes with either 3m x 0.5 threaded thru inserts or fo r ?.125 thru-hole add: ?th? suffix to model part number. example: FA12S5-300th 5. for heat sink add: ?hs? suffix to model part number. example: FA12S5-300hs. 6. optional chassis mount version available (see cmfa series). pin designation pin ? 1 +out ?.081 [2.06] 2 +sense ?.040 [1.02] 3 trim ?.040 [1.02] 4 -sense ?.040 [1.02] 5 -out ?.081 [2.06] 6 +in ?.081 [2.06] 7 sd ?.040 [1.02] 8 sync ?.040 [1.02] 9 -in ?.081 [2.06] see note 5 heatsink standard
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 4 of 14 design considerations under voltage lock out (uvlo) the converter output is disabled until the input voltage exceed s the uvlo turn-on limit. the converter will remain on until th e input voltage falls below the uvlo turn-off limit. there is ap proximately 0.5v hysteresis in the uvlo circuit. over current protection the converter is internally protected from short circuit and over current conditions. during these fault conditions, the conve rter output will ?hiccup?- (short) or ?fold back? - (over current). the co nverter output will recover once the short or over current fault is removed. over temperature protection the converter is protected from over temperature conditions. upon exceeding this temperature, th e converter will shut down. t he converter will automatically recover once it has sufficiently cooled. input filter a 1,000f low esr capacitor across the input pins is recommended fo r most system level designs. no additional input capacitance is needed for the power supply to operate with low impedance inputs . however, most ?real world? system level integration will hav e some amount of trace or wiring lengths ? raising the inductive impe dance. the added input capacito r will bring the impedance back towards unity. output filter no additional output capacitor is needed for the power supply to operate within stated specifications. however, if it is a req uirement to reduce the ripple and noise on the output, add itional capacitance may be added. usually , ceramic mlcc?s capacitor works best f or reducing h.f. spike noise. also, capacitance in the form of a tantalum or aluminum electrolytic capac itor may also be placed a cross the output in order reduce base ripple, and improve the load transient peak-to-peak voltage deviation. remote sense to improve the voltage regulation at the load, route the connections from the -sense and the +sense pins to the ?vout and +vout connections at the load. this will force the converter to regulat e the voltage at the load and not at the pins of the converte r. if it is not desired to use the remotes sense feature, the ?sense and +sense pins should be connected to the -vout and +vout pins respective ly. fusing it is required that the input to the converter be supplied with a maximum 50 a, 250 v rated fuse. safety the fa series is ce pending and pending approval of the following: ul1950, cul950, tuv60950 file 155800. the isolation provided by the fa series is a basic insulation in accordance w ith en60950. selv output reliability is maintained only if the input to the fa converter is an selv source. remote on/off the fa series has remote on/off (enable/disable) capability us ing ttl logic levels. this function is offered as either active=ttl high (no suffix) or active=ttl low (r suffix), see order details on page 14. for remote on/off limits, see page 2. figure 2. remote (l/e )
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 5 of 14 synchronization the fa series provides synchronization of switching frequencies between multiple fa series power supplies. the synchronization function is accomplished without the need for any added external ci rcuitry. by tying the sync pin between fa modules, they will all automatically synchronize. if synchronization is not used, the pin should be tied to ?vin. output voltage trim the following information is provided to allow quick calculation of the trim resistor value for a desired output voltage. the general procedure for calculating a trim resistor is as follows: 1. determine the desired output voltage deviation %. 2. to trim down, solve for resistor value using the ?rtlow? equation. 3. to trim up, solve for resistor value using the ?rthi? equation. 4. solved resistor values are in k ? . notes: 1. maximum trim range is 10%. this includes remote sense drops if applicable. 2. output current is limited to specified current when trimming down. 3. output power is limited to specified power when trimming up. 4. trim resistors should be placed close to the module. 5. if the trim function is not used, it is advised to leave the trim pin floating / not connected. ? ? ? ? ? ? ? ? ? 2 . 10 % 510 rtlow ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 2 . 10 % 510 % 2225 . 1 %) 100 ( o v 1 . 5 rthi figure 3 figure 4
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 6 of 14 graph 1: FA12S5-300 efficiency vs. output current 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 0 10203040506070 output current (amps) efficiency (%) low line nominal line high line graph 2: FA12S5-300 max ambient vs. output power 0 50 100 150 200 250 300 -40-30-20-10 0 102030405060708090100 ambient temperature (deg. c.) output power (watts) 0 lfm 100 lfm 200 lfm 300 lfm 400 lfm note: when trimming the output high, i o vs. ambient is derated by power. i.e.: from graph 2, find the maximum current at the desired ambient and airflow, and multiply this current by the nominal volta ge (5v) to get the maximum power. divide this power by the desired trimmed high voltage to get the maximum current at that ambient. when trimming low, the maximu m current stays the same as show n in graph 2.
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 7 of 14 graph 3: input current vs. input voltage 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 0 10203040 input voltage input current (amps) io=15.0a io=30.0a io=45.0a io=60.0a FA12S5-300 graph 4: power dissipation vs. input voltage 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 0 5 10 15 20 25 30 35 40 input voltage power dissipation (watts) io=15.0a io=30.0a io=45.0a io=60.0a
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 8 of 14 graph 5: input current characteristics at light load 0 0.5 1 1.5 2 10 15 20 25 30 35 40 input voltage input current no load 0.5a 1.0a 1.5a 2.0a
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 9 of 14 photo 1: full load (resistive) startup. ch.1 = vin (5v/div), ch.2 = vout (1v/div). photo 2: full load (resistive) st artup, via logic enable. ch. 1 = l/e (1v /div), ch.2 = vout (1v/div). photo 3: full load turn-off, via logic enable. ch.1 = l/e (2v/div), ch.2 = vout (2v/div). photo 4: output ripple, 10vin, full load. 20mv / div.
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 10 of 14 photo 5. output ripple, 12vin, full load. 20mv / div. photo 6: . output ripple, 36vin, full load. 20mv / div. photo 7: transient response 50% to 100% vin=5v, iout = 30.0a to 60a @ .2v/ div cout=0.1uf ceramic + 10uf tantalum photo 8: overload output curren t, 0.001 ohm impedance. 24vin, 50a / div.
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 11 of 14 test setup: the FA12S5-300 specifications are tested with the following configurations: regulation and efficiency setup to ensure that accurate measurement are taken, the voltage measur ements are taken directly at the terminals of the module. thi s minimizes errors due to contact and trace leng ths between the load and the output of th e supply. the following diagram is of t he test setup. figure 5: regulation and efficiency probe setup output ripple voltage setup the module is tested with a 0.1f ceramic capacitor in parallel with a 10f tantalum capacitor across the output terminals. unl ess otherwise specified, bandwidth is limited to 20mhz. figure 6: ripple voltage probe setup
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 12 of 14 input reflected ripple current a nd input ripple voltage setup the module is tested for input reflected ripple current (irrc). th e input ripple voltage is also measured at the pins with and without an additional 33f electrolytic capacitor. to reduce either the inpu t ripple current or voltage add itional capacitors and/or an i nductor may be added to the input of the converter. figure 7: ripple current setup converter thermal consideration the converter is designed to operate without convective cooling if the de-rating curves are follo wed. the converter can operat e at higher temperatures and higher output currents if airflow and/or a heatsink are applied. airflow should be aligned lengthwise to the converter?s heatsink fins for optimum heat transfer. see graph 2 for de-rating curves or contact factory for additional thermal informatio n. figure 8: airflow orientation
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 13 of 14 paralleling converters the fa series converters may be paralleled both for redundancy and for higher output current. however, in order to do this, a high- current, low v f , schottky diode must be placed at the +vo pin of each supply as shown in figure 9. to improve sharing, tie the two trim pins together. the converters may be trimmed by adding a resistor valu e from each trim pin to rs pin, or alternatively, a single resistor of half the value from the common trim pins to the common rs pins. figure 9: paralleling converters
technical datasheet wall industries, inc. rev c FA12S5-300 (888) 597-wall www.wallindustries.com page 14 of 14 ordering information: company information: wall industries, inc. has created custom and modified units for over 50 years. our in-house research and development engineers will provide a solution that exceeds your perfo rmance requirements on time and on budget. our iso9001-2008 certification is just one example of our commitment to produc ing a high quality, well-documented product for our customers. our past projects demonstrate our commitment to you, our cu stomer. wall industries, inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and f unction requirements. we will continue to provide ongoing support for your project a bove and beyond the design and production phases. give us a call today to discuss your future projects. contact wall industries for further information: phone: ? (603)778-2300 toll free: ? (888)587-9255 fax: ? (603)778-9797 e-mail: sales@wallindustries.com web: www.wallindustries.com address: 5 watson brook rd. exeter, nh 03833 part number example: fa 12 s 5 ? 300 r th ? hs options blank active high enable r active low enable series designation nominal input voltage single output nominal output voltage maximum output power options blank no heat sink hs with heat sink options blank threaded hole th through hole

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