y internal smd construction y ul 94v-0 package material y temperature performance -40] to +75] y low ripple and noise y remote on/off control y low cost y 4:1 wide input range y mtbf > 1,000,000 hours y 1500vdc isolation y efficiency up to 80% key features 2w, wide input range sip, single & dual output dc/dc converters minmax's mew1000-series power modules are low-profile dc-dc converters that operate over input voltage ranges of 9-36vdc and 18-75vdc which provide precisely r egulated output voltages of 3.3v, 5v, 12v, 15v, {5v, {12v and {15vdc. the mew1000 series is an excellent selection for data communica tion equipments, mobile battery driven equipments, distributed p ower systems, telecommunication equipments, mixed analog/digital subsys tems, process/machine control equipments, computer peripheral systems and industrial robot systems. the modules have a maximum power rating of 2w and a typical fu ll-load efficiency of 80%, conti nuous short circuit, 30mv output ripple, built-in filtering for both input and output minimize the need for external filtering. wide range 4:1 remote on/off i/o isolation 1500 vdc low cost $ low profile low noise free-air convection cooling exceeding the absolute maximum rati ngs of the unit could cause damage. these are not conti nuous operating ratings. % 95 --- humidity mw 2,500 --- internal power dissipation ] +105 -55 storage temperature ] 260 --- lead temperature (1.5mm from case for 10 sec.) ] +90 -40 case operating temperature vdc 100 -0.7 48vdc input models ] +75 -40 ambient operating temperature vdc 50 -0.7 24vdc input models input surge voltage ( 1000 ms ) unit max. min. conditions parameter unit max. min. parameter environmental specifications absolute maximum ratings mew1000 serie s rev:3 2008/10/02 minmax 1 www..net www..net
76 55 {17 {67 {15 mew1037 76 55 {21 {83 {12 mew1036 70 60 {50 {200 {5 mew1035 78 54 33 134 15 MEW1034 78 54 42 167 12 mew1033 72 58 100 400 5 mew1032 70 600 15 49 125 500 3.3 48 ( 18 ~ 75 ) mew1031 79 106 {17 {67 {15 mew1027 77 108 {21 {83 {12 mew1026 73 114 {50 {200 {5 mew1025 80 105 33 134 15 mew1024 79 106 42 167 12 mew1023 76 110 100 400 5 mew1022 71 300 20 97 125 500 3.3 24 ( 9 ~ 36 ) mew1021 % (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 # for each output uf 47 100 470 110 170 1000 2200 maximum capacitive load unit { 15v # { 12v # { 5v # 15v 12v 5v 3.3v models by vout capacitive load 135ma slow - blow type 350ma slow - blow type 48v input models 24v input models input fuse selection guide capacitor type input filter mw 1500 --- --- short circuit input power a 0.5 --- --- all models reverse polarity input current 16 --- --- 48v input models 8 --- --- 24v input models under voltage shutdown 17 12 8.5 48v input models vdc 8.5 6 4.5 24v input models start voltage unit max. typ. min. model parameter input specifications mew1000 serie s 2 minmax rev:3 2008/10/02 www..net www..net
k hours --- --- 1000 mil-hdbk-217f @ 25], ground benign mtbf khz --- 300 --- switching frequency pf 500 250 --- 100khz,1v isolation capacitance m[ --- --- 1000 500vdc isolation resistance vdc --- --- 1650 flash tested for 1 second isolation voltage test vdc --- --- 1500 60 seconds isolation voltage rated unit max. typ. min. conditions parameter general specifications continuous output short circuit %/] {0.02 {0.01 --- temperature coefficient % {5 {3 --- transient response deviation us 300 100 --- 25% load step change transient recovery time % --- --- 120 over power protection mv rms 15 --- --- ripple & noise (20mhz) mv p-p 75 --- --- over line, load & temp. ripple & noise (20mhz) mv p-p 50 30 --- ripple & noise (20mhz) % {0.75 {0.5 --- io=25% to 100% load regulation % {0.5 {0.3 --- vin=min. to max. line regulation % {2.0 {1.0 --- dual output, balanced loads output voltage balance % {2.0 {1.0 --- output voltage accuracy unit max. typ. min. conditions parameter output specifications referenced to negative input control common ma 1 --- --- vin = 5.0v control input current ( off ) ma -1 --- --- vin = 0v control input current ( on ) ma 3 1 --- device standby input current vdc 15 --- 2.9 supply off under 0.6 vdc or open circuit, drops down to 0vdc by 2mv/] supply on unit max. typ. min. conditions parameter remote on/off control notes: 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 converters require a minimum output loading to maintain specified regulation. 5. operation under no-load conditions will not damage these modules; however, they ma y not meet all specifications listed. 6. all dc/dc converters should be externa lly fused on 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. mew1000 serie s rev:3 2008/10/02 minmax 3 www..net www..net
block diagram 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 input voltage transient rating dual output +vo pfm isolation ref.amp +vin -vin com. -vo on/off single output pfm isolation ref.amp +vin -vin -vo +vo on/off mew1000 serie s 4 minmax rev:3 2008/10/02 www..net www..net
derating curve ] ambient temperature output power (%) 0 20 40 60 80 100 -40 50 60 80 100 110 90 70 400lfm 200lfm 100lfm natural convection efficiency vs output load ( dual output ) efficiency vs output load ( single output ) 20 30 40 50 60 70 80 90 efficiency (%) load current(%) 10 20 60 40 80 100 20 30 40 50 60 70 80 90 efficiency (%) load current(%) 10 20 60 40 80 100 efficiency vs input voltage ( dual output ) efficiency vs input voltage ( single output ) 40 50 60 70 80 90 100 efficiency (%) nom low high input voltage (v) 40 50 60 70 80 90 100 efficiency (%) nom low high input voltage (v) mew1000 serie s rev:3 2008/10/02 minmax 5 www..net www..net
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 simulated source impedance. capacitor cin, offsets possible battery impedance. current ripple is measured at the input terminals of the module, measurement bandwidth is 0-500khz. 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 remote on/off negative logic remote on/off turns the module off during a logic high voltage on the remote on/off pin, and on during a logic low. to turn the power module on and off, the user must supply a switch to control the volt age between the on/off terminal and the -vin terminal. the switch can be an open collector or equivalent. a logic high is 2.9v to 15v. a logic low is under 0.6 vdc or open circuit, drops down to 0vdc by 2mv/] the maximum sink current at on/off terminal during a logic low is 1 ma. the maximum allowable leakage cu rrent of the switch at on/off terminal =(under 0.6vdc or open circuit) is 1ma. maximum capacitive load the mew1000 series has limitation of maximum connected capacitanc e on the output. the power module may operate in current limiting mode during start-up, affecting the ramp-up and the startup time. the maximum capacitance can be found in the data sheet. 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 on the input to insure startup. by using a good quality low equivalent series resistance (esr < 1.0[ at 100 khz) capacit or of a 1.5uf for the 24v and 48v devices, capacitor mounted close to the power module helps ensure stability of the unit. 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 that 3.3uf capacitors are used on output. mew100 0 serie s 6 minmax rev:3 2008/10/02 +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 single output dc / dc converter +out -out +vin -vin load dc power source + - cout com. dual output dc / dc converter www..net www..net
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 90 c. the derating curves were determined from measurements obtained in an exper imental apparatus. m ew100 0 serie s rev:3 2008/10/02 minmax 5 dut position of air velocity probe and thermocouple 50mm / 2in air flow 15mm / 0.6in www..net www..net
ul94v-0 : flammability 6.5g : weight non-conductive black plastic : case material 1.02*0.36*0.49 inches 25.95*9.25*12.45 mm : case size 1 23 6789 2.54 2.03[0.08] 7.62[0.300] 2.54[0.100]x8=20.32[0.80] 25.95[1.02] 2.75[0.11] 0.5[0.02] 0.3[0.012] 12.45[0.49] 9.25[0.36] [0.100] 3.2[0.13] physical characteristics mechanical dimensions nc: no connection -vout -vout 9 nc nc 8 common nc 7 +vout +vout 6 remote on/off remote on/off 3 +vin +vin 2 -vin -vin 1 dual output single output pin pin connections {0.002 {0.05 pin x.xxx{0.005 x.xx{0.13 x.xx{0.01 x.x{0.25 inches millimeters tolerance mew1000 serie s 8 minmax rev:3 2008/10/02 www..net www..net
|
