mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 1 of 8 ? features ? smallest encapsulated 50w converter ? package size 2.0?x 1.0?x 0.4? ? ultra-wide 4:1 lnput range ? excellent efficiency up to 92% ? output current up to 10a ? i/o-isolation voltage 1500vdc ? under- voltage shutdown ? over load and over voltage protection ? shielded metal case with isolated baseplate ? csa/ul/iec/en 60950-1 (approval pending) ? heatsink (optional) ? 3 years product warranty product overview the minmax mkwi50 series is the latest generation of high performance dc-dc convert er modules setting a new standard concerning power density. the product offers fully 50w in an encapsulated, shielded metal packa ge with dimensions of just 2.0?x1.0?x0.4?.all models provide u ltra-wide 4:1 input voltage range and precisely regulat ed output voltages. a very high efficiency up to 92% which allows an operating temperat ure range of -40c to +80c is achieved by advanced circuit topology . further features include remote on/off, trimmable output voltage, under-voltage sh utdown as well as overload and over-temperature protection. typical applications for these converters are battery operated equipment, instrumentat ion, distributed power architectures in c ommunication and industrial electronics and many other space critical applications. model selection guide output current input current efficiency (typ.) input voltage (range) output voltage max. @max. load @no load reflected ripple current over voltage protection max. capacitive load @max. load model number vdc vdc ma ma(typ.) ma(typ.) ma(typ.) vdc f % mkwi50-24s033 3.3 10000 1528 80 3.9 26000 90 mkwi50-24s05 5 10000 2290 60 6.2 17000 91 mkwi50-24s12 12 4170 2267 80 15 3000 92 mkwi50-24s15 15 3330 2263 80 18 2000 92 mkwi50-24s24 24 ( 9 ~ 36 ) 24 2080 2286 80 40 30 750 91 mkwi50-48s033 3.3 10000 764 40 3.9 26000 90 mkwi50-48s05 5 10000 1145 30 6.2 17000 91 mkwi50-48s12 12 4170 1134 60 15 3000 92 mkwi50-48s15 15 3330 1134 60 18 2000 92 MKWI50-48S24 48 ( 18 ~ 75 ) 24 2080 1143 50 30 30 750 91 input specifications parameter model min. typ. max. unit 24v input models -0.7 --- 50 input surge voltage (100ms. max) 48v input models -0.7 --- 100 24v input models --- --- 9 start-up threshold voltage 48v input models --- --- 18 24v input models --- 7.5 --- under voltage lockout 48v input models --- 16 --- vdc input polarity protection none power up --- --- 30 ms start up time remote on/off nominal vin and constant resistive load --- --- 30 ms internal filter type all models lc filter (for en55022,class a compliance see page 6) short circuit current --- (hiccup mode 0.3 hz typ.)
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 2 of 8 ? output specifications parameter conditions min. typ. max. unit output voltage setting accuracy at 50% load and nominal vin --- --- 1.0 %vnom. line regulation vin=min. to max. @full load --- --- 0.5 % load regulation min. load to full load --- --- 0.5 % minimum load no minimum load requirement 3.3v & 5v models (3) --- 100 --- mv p-p ripple & noise (20mhz bandwith) 12v, 15v & 24v models (3) --- 150 --- mv p-p transient recovery time 25% load step change (2) --- 250 --- sec temperature coefficient --- --- 0.02 %/ over load protection current limitation at 150% typ. of iout max., hiccup short circuit protection hi ccup automatic recovery over voltage protection for shutdown voltage see model selection guide general specifications parameter conditions min. typ. max. unit i/o isolation voltage (rated) 60 seconds 1500 --- --- vdc i/o isolation resistance 500 vdc 1000 --- --- m ? i/o isolation capacitance 100khz, 1v --- --- 2200 pf switching frequency --- 285 --- khz mtbf(calculated) mil-hdbk-217f@25 , ground benign 233,500 --- --- hours safety approvals(pending) ul/cul 60950-1 recognition(csa certificat e), iec/en 60950-1(cb-scheme) input fuse 24v input models 48v input models 10000ma slow-blow type 5000ma slow-blow type remote on/off control parameter conditions min. typ. max. unit converter on 3.5v ~ 12v or open circuit converter off 0v ~ 1.2v or short circuit control input current (on) vctrl = 5.0v --- 0.5 --- ma control input current (off) vctrl = 0v --- -0.5 --- ma control common referenced to negative input standby input current nominal vin --- 2.5 --- ma output voltage trim parameter conditions min. typ. max. unit % of nominal output voltage ( 24vo models) +20 / -10 --- --- % trim up / down range (8) % of nominal output voltage (other models) 10 --- --- % environmental specifications max. parameter model min. without heatsink with heatsink unit mkwi50-24s033, mkwi50-48s033 61 69 mkwi50-24s12, mkwi50-24s15 mkwi50-48s12, mkwi50-48s15 53 62 mkwi50-24s05, mkwi50-24s24 operating ambient temperature range (natural convection, see derating) mkwi50-48s05, MKWI50-48S24 -40 46 57 natural convection wit hout heatsink 12.1 --- /w natural convection with heatsink 9.8 --- /w 100lfm convection without heatsink 9.2 --- /w 100lfm convection with heatsink 5.4 --- /w 200lfm convection without heatsink 7.8 --- /w 200lfm convection with heatsink 4.5 --- /w 400lfm convection without heatsink 5.2 --- /w thermal impedance 400lfm convection with heatsink 3.0 --- /w case temperature --- +105 thermal protection shutdown temperature 110 typ. storage temperature range -50 +125 humidity (non condensing) --- 95 % rel. h rfi six-sided shielded, metal case lead temperature (1.5mm from case for 10sec.) --- 260
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 3 of 8 ? emc specifications parameter standards & level performance emi en55022 class a (see page 6) esd en61000-4-2 air 8kv , contact 6kv perf. criteria a radiated immunity en61000-4-3 10v/m perf. criteria a fast transient (see note 7) en61000-4-4 2kv perf. criteria a surge (see note 7) en61000-4-5 1kv perf. criteria a conducted immunity en61000-4-6 10v/m perf. criteria a power derating curve output power (%) output power (%) mkwi50-24s033,mkwi50-48s033 derating curve without heatsink mkwi50-24s033,mkwi50-48s033 derating curve with heatsink output power (%) output power (%) mkwi50-24s12,mkwi50-24s15, mkwi50-48s12, mkwi50-48s15 derating curve without heatsink mkwi50-24s12,mkwi50-24s15, mkwi50-48s12, mkwi50-48s15 derating curve with heatsink output power (%) output power (%) mkwi50-24s05, mkwi50-24s24, mkwi50-48s05, MKWI50-48S24 derating curve without heatsink mkwi50-24s05, mkwi50-24s24, mkwi50-48s05, MKWI50-48S24 derating curve with heatsink
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 4 of 8 ? efficiency curve @25 mkwi50-24s033 efficiency vs load current mkwi50-24s05 efficiency vs load current mkwi50-24s12 efficiency vs load current mkwi50-24s15 efficiency vs load current mkwi50-24s24 efficiency vs load current mkwi50-48s033 efficiency vs load current mkwi50-48s05 efficiency vs load current mkwi50-48s12 efficiency vs load current mkwi50-48s15 efficiency vs load current MKWI50-48S24 efficiency vs load current 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 9v 24v 36v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 9v 24v 36v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 9v 24v 36v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 9v 24v 36v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 9v 24v 36v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 5 of 8 ? notes 1 specifications typical at ta=+25 , resistive load, nominal input voltage, ra ted output current unless otherwise noted. 2 transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%. 3 ripple & noise measurement bandwidth is 20 mhz, measured with a 1 f mlcc and a 10 f tantalum capatitor. 4 all dc/dc converters should be externally fused at the front end for protection. 5 other input and output voltage may be av ailable, please contact factory. 6 to order the converter with heatsink, please add a suffix -hs (e.g. mkwi50-24s05-hs) to order code. 7 the mkwi50 series can meet en61000-4-4 & en61000-4-5 by adding a capacitor across the input pins.suggested capacitor: chemi-con ky 220 f/100v. 8 do not exceed maximum power specification when adjusting output voltage. 9 natural convection means an airflow of about 20lfm and is not equal to still air (0 lfm). 10 specifications are subject to change without notice. package specifications mechanical dimensions pin connections pin function 1 +vin 2 -vin 3 remote on/off 4 +vout 5 -vout 6 trim ? all dimensions in mm (inches) ? tolerance : x.x0.25 (x.xx0.01) x.xx0.13 ( x.xxx0.005) ? pin diameter ? 1.0 0.05 (0.040.002) physical characteristics case size : 50.8x25.4x11mm (2.0x1.0x0.43 inches) case material : aluminium alloy, black anodized coating base material : fr4 pcb (flammability to ul 94v-0 rated) pin material : copper alloy with gold plate over nickel subplate potting material : epoxy (ul94-v0) weight : 34g 10.16 25.4 [1.00] [0.40] 10.16 [0.40] 2.54 [0.10] 10.16 [0.40] 5.08 [0.20] bottom view 45.72 [1.80] 50.8 [2.00] 11.0 [0.43] 5.5 [0.22] 1.00 [ 0.04] 6 54 1 2 3 3.6 [0.14] 1.1 [0.04]
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 6 of 8 ? heatsink (option ?hs) physical characteristics heatsink material : aluminum finish : black anodized coating weight : 9g ? the advantages of adding a heatsink are: 1. to help heat dissipation and increase the stability and reliability of dc/dc converters at high operating temperature atmosphere. 2. to upgrade the operating tem perature of dc/dc converters, please refer to derating curve. emi-filter to meet en 55022, class a; fcc part 15 ,level a conducted and radiated emi ssions en55022 class a part no. mkwi50-24sxx mkwi50-48sxx c1 10 f/50v 1210 x7s mlcc 3.3 f/100v 1210 x7s mlcc c2 1000pf/2kv 1206 mlcc 1000pf/2kv 1206 mlcc l1 smtdr54-1r5m-jt8 smtdr54-6r8m-jt8 31.0 [1.22]max heat-sink thermal pad clamp converter 31.1 [1.22] 18.0 [0.71]max
mkwi50 series dc/dc converter 50w, highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2013/01/25 p4 page 7 of 8 ? external output trimming output can be externally trimmed by using the method shown below mkwi50-xxs033 trim table trim down 1 2 3 4 5 6 7 8 9 10 % vout= vox0.99 vox0.98 vox0.97 vox0.96 vox0.95 vox0.94 vox0.93 vox0.92 vox0.91 vox0.90 volts rd= 63.59 30.28 18.19 11.95 8.13 5.56 3.70 2.31 1.21 0.34 kohms trim up 1 2 3 4 5 6 7 8 9 10 % vout= vox1.01 vox1.02 vox1.03 vox1.04 vox1.05 vox1.06 vox1.07 vox1.08 vox1.09 vox1.10 volts ru= 70.50 29.28 16.87 10.90 7.38 5.06 3.42 2.20 1.25 0.49 kohms mkwi50-xxs05 trim table trim down 1 2 3 4 5 6 7 8 9 10 % vout= vox0.99 vox0.98 vox0.97 vox0.96 vox0.95 vox0.94 vox0.93 vox0.92 vox0.91 vox0.90 volts rd= 45.53 20.61 12.31 8.15 5.66 4.00 2.81 1.92 1.23 0.68 kohms trim up 1 2 3 4 5 6 7 8 9 10 % vout= vox1.01 vox1.02 vox1.03 vox1.04 vox1.05 vox1.06 vox1.07 vox1.08 vox1.09 vox1.10 volts ru= 36.57 16.58 9.92 6.59 4.59 3.25 2.30 1.59 1.03 0.59 kohms mkwi50-xxs12 trim table trim down 1 2 3 4 5 6 7 8 9 10 % vout= vox0.99 vox0.98 vox0.97 vox0.96 vox0.95 vox0.94 vox0.93 vox0.92 vox0.91 vox0.90 volts rd= 394.50 179.74 106.08 68.86 46.39 31.36 20.60 12.51 6.21 1.17 kohms trim up 1 2 3 4 5 6 7 8 9 10 % vout= vox1.01 vox1.02 vox1.03 vox1.04 vox1.05 vox1.06 vox1.07 vox1.08 vox1.09 vox1.10 volts ru= 368.92 161.92 94.97 61.86 42.12 29.00 19.66 12.66 7.23 2.89 kohms mkwi50-xxs15 trim table trim down 1 2 3 4 5 6 7 8 9 10 % vout= vox0.99 vox0.98 vox0.97 vox0.96 vox0.95 vox0.94 vox0.93 vox0.92 vox0.91 vox0.90 volts rd= 572.67 248.63 145.60 94.97 64.87 44.92 30.72 20.10 11.86 5.28 kohms trim up 1 2 3 4 5 6 7 8 9 10 % vout= vox1.01 vox1.02 vox1.03 vox1.04 vox1.05 vox1.06 vox1.07 vox1.08 vox1.09 vox1.10 volts ru= 392.98 182.12 108.73 71.43 48.85 33.71 22.86 14.69 8.33 3.23 kohms mkwi50-xxs24 trim table trim down 1 2 3 4 5 6 7 8 9 10 % vout= vox0.99 vox0.98 vox0.97 vox0.96 vox0.95 vox0.94 vox0.93 vox0.92 vox0.91 vox0.90 volts rd= 318.05 146.05 85.8 55.51 37.415 25.625 16.515 9.81 4.9785 0.9185 kohms trim up 2 4 6 8 10 12 14 16 18 20 % vout= vox1.02 vox1.04 vox1.06 vox1.08 vox1.1 vox1.12 vox1.14 vox1.16 vox1.18 vox1.20 volts ru= 247.2 109.255 63.38 39.025 27.52 18.39 11.77 7.29 3.308 0.3658 kohms mkwi50 module bottom view mkwi50 module bottom view
mkwi50 series dc/dc converter 50w, highest power density 18, sin sin road, an-ping industr ial district, tainan 702, taiwan tel: 886-6-2923150 fax: 886-6-2923149 e-mail: sales@minmax.com.tw 2013/01/25 p4 pag e 8 of 8 minmax technology co., ltd. ? test setup input reflected-ripple current test setup input reflected-ripple current is measured with a inductor lin (4.7 h) and cin (220 f, esr < 1.0 ? at 100 khz) to simulate source impedance. capacitor cin, offsets possible battery impedance. current ripple is measured at the input terminals of t he module, measurement bandwidth is 0-500 kh z. peak-to-peak output noise measurement test use a 1 f ceramic capacitor and a 10 f tantalum capacitor. scope measurement should be made by using a bnc socket, measurement bandwidth is 0-20 mhz. position the load between 50 mm and 75 mm from the dc/dc converter. technical notes remote on/off positive logic remote on/off turns the m odule on during a logic high voltage on the remote on/off pin, and off during a logic l ow. to turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the -vin terminal. the switch can be an o pen collector or equi valent. a logic low is 0v to 1.2v. a logic high is 3.5v to 12v. the maximum sink current at the on/off termi nal (pin 3) during a logic low is -100 a. overcurrent protection to provide hiccup mode protection in a faul t (output overload) condition, the unit is equipped with in ternal current limiting c ircuitry and can endure overload for an unlimited duration. overvoltage protection the output overvoltage clamp consists of control circuitry, wh ich is independent of the primary r egulation loop, that monitors the voltage on the output terminals. the control loop of the clamp has a higher voltage set point t han the primary loop. this provides a redundant voltage control that reduces the risk of output overvoltage. the ovp level can be found in the output data . input source impedance the power module should be connected to a lo w ac-impedance input source. highly inductive source impedances can affect the stab ility of the power module. in applications where power is supplied ov er long lines and output loading is high, it may be necessary to use a capacitor at t he input to ensure startup. capacitor mounted close to the power module helps ensure stabilit y of the unit, it is recommended to use a good quality low equ ivalent series resistance (esr < 1.0 at 100 khz) capacitor of a 10 f for the 24v and 48v devices. + +out -out +vin -vin dc / dc converter load dc power source + - cin output ripple reduction a good quality low esr capacitor placed as close as practicable across the load will give the best ripple and noise performance . to reduce output ripple, it is recommended to use 4.7 f capacitors at the output. +out -out +vin -vin load dc power source + - cout single output dc / dc converter maximum capacitive load the mkwi50 series has limitation of maximum connected capacitanc e at the output. the power module may be operated in current l imiting mode during start-up, affecting the ramp-up and the startup time. the maximum capacitance can be found in the data sheet. thermal considerations many conditions affect the thermal perform ance of the power module, such as orient ation, airflow over the module and board spac ing. to avoid exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 105 . the derating curves are determined from measurements obtained in a test setup. +out -out +vin -vin dc / dc converter load battery + lin + cin to oscilloscope current probe +out -out +vin -vin single output dc / dc converter resistive load scope copper strip cout copper strip dut position of air velocity probe and thermocouple 50mm / 2in air flow 15mm / 0.6in
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