dual output +vo pwm isolation ref.amp lc filter +vin -vin com. -vo single output pwm isolation ref.amp lc filter +vin -vin -vo +vo block diagram wide range 2:1 en55022 emi i/o isolation 1500 vdc low cost $ mkw1000 series of dc/dc converters, comprising 24 different models, is designed for a wide range of applications including data communication equipments, mobile battery driven equipments, distributed power systems, telecommunication equipments, mixed analog/digital subsystems, process/machine control equipments,computer peri pheral systems and industrial robot systems. packing up to 10w of power into a 2 x 1 x 0.4 inch package, with efficiencies as high as 83%, the mkw1000 has wide input ranges of 9-18vdc, 18-36vdc and 36-75vdc and is available in output voltages of 3.3v, 5v, 12v, 15v, 24v, {5v, {12v and {15v. other feathers include continuous short circuit protection, six-side shielded case and en55022 level a conducted noise compliance minimize design-in ti me, cost and eliminate the need for external components. y mtbf > 700,000 hours y six-side shielded case y emi complies with en55022 class a y industry standard pinout y short circuit protection y smt technology y i/o isolation 1500vdc y 2:1 input range y high efficiency up to 83% key features single and dual outputs 10 watts 2:1 wide input range dc/dc converters
83 251 {17 {333 {15 mkw1048 83 251 {21 {416 {12 MKW1047 81 257 {50 {1000 {5 mkw1046 83 251 21 416 24 mkw1045 83 252 34 670 15 mkw1044 82 253 42 830 12 mkw1043 80 260 100 2000 5 mkw1042 76 12 10 217 120 2400 3.3 48 ( 36 ~ 75 ) mkw1041 82 507 {17 {333 {15 mkw1038 82 507 {21 {416 {12 mkw1037 80 521 {50 {1000 {5 mkw1036 83 501 21 416 24 mkw1035 82 511 34 670 15 mkw1034 82 506 42 830 12 mkw1033 78 534 100 2000 5 mkw1032 76 25 20 434 120 2400 3.3 24 ( 18 ~ 36 ) mkw1031 80 1041 {17 {333 {15 mkw1028 81 1027 {21 {416 {12 mkw1027 78 1068 {50 {1000 {5 mkw1026 81 1027 21 416 24 mkw1025 80 1047 34 670 15 mkw1024 80 1038 42 830 12 mkw1023 77 1082 100 2000 5 mkw1022 72 50 30 917 120 2400 3.3 12 ( 9 ~ 18 ) mkw1021 % (typ.) ma (typ.) ma (typ.) ma (typ.) ma ma vdc vdc @max. load @no load @max. load min. max. efficiency reflected ripple current input current output current output voltage input voltage model number model selection guide en55022 class a conducted emi free-air convection cooling % 95 --- humidity ] +125 -40 storage temperature ] +90 -40 case operating temperature ] +71 -40 ambient operating temperature unit max. min. conditions parameter environmental specifications exceeding these values can damage t he module. these are not continuous operating ratings. mw 5,000 --- internal power dissipation ] 260 --- lead temperature (1.5mm from case for 10 sec.) vdc 100 -0.7 48vdc input models vdc 50 -0.7 24vdc input models vdc 25 -0.7 12vdc input models input surge voltage ( 1000 ms ) unit max. min. parameter note : 1. specifications typical at ta=+25], resistive load, nominal input voltage, rated 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 0-20 mhz. 4. these power converte rs require a minimum output loading to maintain specified regulation. 5. operation under no-load conditions will not damage these devices; however they may not meet all listed specifications. 6. all dc/dc converters s hould be externally fused at the front end for protection. 7. other input and output voltage may be available, please contact factory. 8. specifications subjec t to change without notice. absolute maximum ratings
k hours --- --- 700 mil-hdbk-217f @ 25], ground benign mtbf khz 340 300 260 switching frequency pf 470 150 --- 100khz,1v isolation capacitance m[ --- --- 1000 500vdc isolation resistance vdc --- --- 1650 flash tested for 1 seconds isolation test voltage vdc --- --- 1500 60 seconds isolation voltage unit max. typ. min. conditions parameter general specifications continuous output short circuit %/] {0.02 {0.01 --- temperature coefficient % {4 {2 --- transient response deviation us 300 150 --- 25% load step change transient recovery time % --- --- 120 over power protection mv rms. 15 --- --- ripple & noise (20mhz) mv p-p 100 --- --- over line,load & temp ripple & noise (20mhz) mv p-p 75 50 --- ripple & noise (20mhz) % {0.5 {0.1 --- io=10% to 100% load regulation % {0.3 {0.1 --- vin=min. to max. line regulation % {2.0 {0.5 --- dual output balance load output voltage balance % {1.0 {0.5 --- output voltage accuracy unit max. typ. min. conditions parameter output specifications pi filter input filter mw 4500 3500 --- short circuit input power a 2 --- --- all models reverse polarity input current 34 29 25 48v input models 17 15 13 24v input models 8.5 8 7 12v input models under voltage shortdown 36 33 30 48v input models 18 17 15 24v input models vdc 9 8.5 8 12v input models start voltage unit max. typ. min. model parameter input specifications note: # for each output . uf 470 470 470 2200 2200 2200 2200 2200 maximum capacitive load unit { 15v # { 12v # { 5v # 24v 15v 12v 5v 3.3v models by vout capacitive load
750ma slow - blow type 1500ma slow - blow type 3000ma slow - blow type 48v input models 24v input models 12v input models input fuse selection guide vin ( vdc ) 10us 150 140 130 120 110 100 90 80 70 60 100us 1ms 10ms 100ms 50 40 30 20 10 0 48vdc input models 24vdc input models 12vdc input models input voltage transient rating
derating curve ?
test configurations input reflected-ripple current test setup input reflected-ripple current is measured with a inductor lin (4.7uh) and cin (220uf, 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 the module, measurement bandwidth is 0-500 khz. peak-to-peak output noise measurement test use a cout 0.47uf ceramic 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. design & feature considerations maximum capacitive load the mkw1000 series has limitation of maximum connected capacitanc e at the output. the power module may be oper ated in current limiting mode during start-up, affecti ng the ramp-up and the startup time. for optimum performance we recommend 470uf maximum capacitive load for dual outputs and 2200 u f capacitive load for single outputs. the maximum capacitance can be found in the data . overcurrent protection to provide protection in a f ault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure current limiting for an unlimited duration. at the point of current-limit incepti on, the unit shifts from voltage control to current control. t he unit operates normally once the output current is brought ba ck into its specified range. input source impedance the power module should be connected to a low ac-impedance input source. highly inductive source impedances can affect the st ability of the power module. in applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor at the input to ensure startup. capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low equivalent series resistance (esr < 1.0[ at 100 khz) capacitor of a 15uf fo r the 12v input devices and a 4.7uf for the 24v and 48v devices. 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 3.9uf capacitors at the output. +out -out +vin -vin dc / dc converter load battery + lin + cin to oscilloscope current probe +out -out +vin -vin dual output dc / dc converter resistive load scope copper strip cout com. scope cout +out -out +vin -vin single output dc / dc converter resistive load scope copper strip cout + +out -out +vin -vin dc / dc converter load dc power source + - cin +out -out +vin -vin load dc power source + - cout com. dual output dc / dc converter +out -out +vin -vin load dc power source + - cout single output dc / dc converter
thermal considerations many conditions affect the thermal performance of the power module, such as orientat ion, airflow over the module and board spacing. to avoid exceeding the maximum temperature rating of t he components inside the power module, the case temperatur e must be kept below 90c. the derating curves are det ermined from measurements obtained in an exper imental apparatus. dut position of air velocity probe and thermocouple 50mm / 2in air flow 15mm / 0.6in
units are encapsulated in a low thermal resistance molding co mpound which has excellent chem ical resistance and electrical properties in high humidity environment and over a wide operating temperature range. the encapsulant and outer shell of the unit have ul94v-0 ratings. the leads are golden plated for better soldering. ul94v-0 : flammability 32g : weight -vout -vout 5 common no pin 4 metal with non-conductive baseplate : case material +vout +vout 3 -vin -vin 2 2.0*1.0*0.4 inches +vin +vin 1 50.8*25.4*10.2 mm : case size dual output single output pin physical characteristics pin connections {0.002 {0.05 pin .xxx{0.01 .xx{0.25 .xx{0.01 .x{0.25 inches millimeters tolerance dual output single output 10.2 [0.40] 6.0 [0.24] 50.8 [2.00] 15.2 [0.60] 10.2 [0.40] bottom side 12 345 10.20 [0.402] 10.20 [0.402] 2.5 [0.10] 20.30 [0.800] 1.00[ 0.039] 25.4 [1.00] 5.08 [0.200] connecting pin patterns top view ( 2.54 mm / 0.1 inch grids ) mechanical data
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