mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 1 of 8 ? features ? smallest encapsulated 40w converter! ? package size 2.0?x 1.0?x 0.4? ? ultra-wide 4:1 lnput range ? excellent efficiency up to 90% ? operating temp. range -40c to +80c ? over-temperature protection ? i/o-isolation voltage 1500vdc ? remote on/off control ? shielded metal case with isolated baseplate ? 3 years product warranty product overview the minmax mkwi40 series is the latest generation of high performance dc-dc conver ter modules setting a new standard concerning power density. the product offers fully 40w in an encapsulated, shielded metal packa ge with dimensions of just 2.0?x1.0?x0.4?. all models provide ultra-wide 4:1 input voltage range and precisely regul ated output voltages. advanced circuit topology provides a very high efficiency up to 90% which allows an operating temperature range of -40c to +80 c. further features include remote on/off, trimmabl e output voltage, under-v oltage lockout as well as overload and over-temperat ure 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. min. @max. load @no load reflected ripple current over voltage protection max. capacitive load @max. load model number vdc vdc ma ma ma(typ.) ma(typ.) ma (typ.) vdc f % mkwi40-24s033 3.3 8000 0 1240 90 3.9 21000 89 mkwi40-24s05 5 8000 0 1850 90 6.2 13600 90 mkwi40-24s12 12 3330 0 1870 95 15 2400 89 mkwi40-24s15 15 2670 0 1870 105 18 1500 89 MKWI40-24S24 24 1670 0 1870 115 30 600 89 mkwi40-24d12 12 1670 145 1890 65 15 1200# 88 mkwi40-24d15 24 (9 ~ 36) 15 1330 110 1890 65 30 18 750# 88 mkwi40-48s033 3.3 8000 0 620 55 3.9 21000 89 mkwi40-48s05 5 8000 0 930 55 6.2 13600 90 mkwi40-48s12 12 3330 0 930 60 15 2400 90 mkwi40-48s15 15 2670 0 930 65 18 1500 90 mkwi40-48s24 24 1670 0 940 75 30 600 89 mkwi40-48d12 12 1670 145 950 45 15 1200# 88 mkwi40-48d15 48 (18 ~ 75) 15 1330 110 950 45 20 18 750# 88 # for each output 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 --- 8.3 --- under voltage lockout 48v input models --- 16.5 --- 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 7) short circuit current --- (hiccup mode 1.5 hz typ.)
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 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. output voltage balance dual ou tput, balanced loads --- --- 2.0 % line regulation vin=min. to max. --- --- 0.5 % single output --- --- 0.5 % load regulation min. load to full load dual output --- --- 1.0 % load cross regulation (dual ou tput) asymmetrical load 25%/100% full load --- --- 5.0 % minimum load no minimum load requirement for single ou tput models, for dual output models see table ripple & noise (20mhz) 3.3v & 5v output models --- 100 --- mv p-p ripple & noise (20mhz) 12v, 15v & 24v models --- 150 --- mv p-p ripple & noise (20mhz) dual output models --- 150 --- mv p-p transient recovery time 25% load step change --- 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 --- --- 1500 pf switching frequency --- 320 --- khz mtbf(calculated) mil-hdbk-217f@25 , ground benign 328,000 --- --- 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 8000ma slow-blow type 4000ma slow-blow type remote on/off control parameter conditions min. typ. max. unit converter on 4.7v ~ 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 trim up / down range % of nominal output voltage 10 --- --- % environmental specifications max. parameter model min. without heatsink with heatsink unit mkwi40-xxs033 66 73 mkwi40-24s05, mkwi40-48s05 mkwi40-48s12, mkwi40-48s15 51 61 mkwi40-24s12, mkwi40-24s15 45 57 mkwi40-24d12, mkwi40-24d15 operating ambient temperature range (natural convection, see derating) mkwi40-48d12, mkwi40-48d15 -40 40 52 natural convection without heatsink 12.0 --- /w natural convection with heatsink 10.0 --- /w 100lfm convection without heatsink 9.0 --- /w 100lfm convection with heatsink 5.4 --- /w 200lfm convection without heatsink 8.0 --- /w 200lfm convection with heatsink 4.5 --- /w 400lfm convection without heatsink 6.0 --- /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
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 3 of 8 ? power derating curve ~ ambient temperature output power (%) 0 20 40 60 80 100 -40 0 20 60 100 110 80 40 400lfm 200lfm 100lfm natural convection c mkwi40-24s033,mkwi40-48s033 derating curve without heatsink mkwi40-24s033,mkwi40-48s033 derating curve with heatsink output power (%) ~ ambient temperature output power (%) 0 20 40 60 80 100 -40 0 20 60 100 110 80 40 400lfm 200lfm 100lfm natural convection c mkwi40-24s05,mkwi40-48s05, mkwi40-48s12, mkwi40-48s15 derating curve without heatsink mkwi40-24s05,mkwi40-48s05, mkwi40-48s12, mkwi40-48s15 derating curve with heatsink ~ ambient temperature output power (%) 0 20 40 60 80 100 -40 0 20 60 100 110 80 40 400lfm 200lfm 100lfm natural convection c ~ ambient temperature output power (%) 0 20 40 60 80 100 -40 0 20 60 100 110 80 40 400lfm 200lfm 100lfm natural convection c mkwi40-24s12,mkwi40-24s15 derating curve without heatsink mkwi40-24s12,mkwi40-24s15 derating curve with heatsink output power (%) ~ ambient temperature output power (%) 0 20 40 60 80 100 -40 0 20 60 100 110 80 40 400lfm 200lfm 100lfm natural convection c mkwi40-24d12,mkwi40-24d15, mkwi40-48d12, mkwi40-48d15 derating curve without heatsink mkwi40-24d12,mkwi40-24d15, mkwi40-48d12, mkwi40-48d15 derating curve with heatsink
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 4 of 8 ? efficiency curve @25 mkwi40-24s033 efficiency vs load current mkwi40-24s05 efficiency vs load current mkwi40-24s12 efficiency vs load current mkwi40-24s15 efficiency vs load current mkwi40-24d12 efficiency vs load current mkwi40-24d15 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(%) 9v 24v 36v
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 5 of 8 ? efficiency curve @25 mkwi40-48s033 efficiency vs load current mkwi40-48s05 efficiency vs load current mkwi40-48s12 efficiency vs load current mkwi40-48s15 efficiency vs load current mkwi40-48d12 efficiency vs load current mkwi40-48d15 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(%) 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 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 % of full load efficiency(%) 18v 48v 75v
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 6 of 8 ? notes 1 specifications typical at ta=+25 , resistive load, nominal input voltage and 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 m/c and a 10 f t/c. 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.mkwi40-12s05-hs) to order code. 7 to order the converter without re mote on/off function, please add a suffix -n (e.g.mkwi40-12s05-n) to order code. 8 that ?natural convection? is about 20lfm but is not equal to still air (0 lfm). 9 specifications subject to change without notice. package specifications mechanical dimensions pin connections pin single output dual output 1 +vin +vin 2 -vin -vin 3 remote on/off remote on/off 4 +vout +vout 5 -vout common 6 trim -vout ? 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 go ld plate over nickel underplate weight : 30g 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 dissipati on and increase the stability and reliability of dc/dc converters at high operating temperature atmosphere. 2. to upgrade the operati ng temperature of dc/dc converters, please refer to derating curve. 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 5 4 1 2 3 3.6 [0.14] 1.1 [0.04] 31.0 [1.22]max heat-sink thermal pad clamp converter 23.0 [0.91] 18.0 [0.71]max
mkwi40 series dc/dc converter 40w , highest power density e-mail:sales@minmax.com.tw tel:886-6-2923150 2012/04/20 rev:4 page 7 of 8 ? emi-filter to meet en 55022, class a; fcc part 15 ,level a conducted and radiated emi ssions en55022 class a part no. mkwi40-24sxx mkwi40-48sxx c1 4.7 f/50v 1812 mlcc 2.2 f/100v 1812 mlcc c2&c3 1000pf/2kv 1808 mlcc 1000pf/2kv 1808 mlcc part no. mkwi40-24dxx mkwi40-48dxx c1 4.7 f/50v 1812 mlcc 2.2 f/100v 1812 mlcc c2&c4 1000pf/2kv 1808 mlcc 1000pf/2kv 1808 mlcc external output trimming output can be externally trimmed by using the method shown below mkwi40-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 mkwi40-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 mkwi40-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 mkwi40-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
mkwi40 series dc/dc converter 40w , 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 2012/04/20 rev:4 page 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. +out -out +vin -vin dc / dc converter load battery + lin + cin to oscilloscope current probe 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. +out -out +vin -vin single output dc / dc converter resistive load scope copper strip cout copper strip +out -out +vin -vin dual output dc / dc converter resistive load scope copper strip cout com. scope cout copper strip copper strip 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 4.7v to 12v. the maximum sink current at the on/off termi nal (pin 3) during a logic low is -100 a. the maximum allowable leakage current of a switch connected to the on/off te rminal (pin 3) at logic high (2.5v to 100v) is 5 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 +out -out +vin -vin load dc power source + - cout com. dual output dc / dc converter load cout maximum capacitive load the mkwi40 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. dut position of air velocity probe and thermocouple 50mm / 2in air flow 15mm / 0.6in
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