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hi-rel dc/dc converter mgdm-75 : 75w power ? ultra wide input range 16-80 vdc, 9-45 vdc? 28vdc input compliant with mil-std-704 a/d/f ? industry standard quarter brick package? power up to 75 w ? wide temperature range : -40/+105 c baseplate ? high efficiency (typ. 86% -90% ) ? soft start? galvanic isolation 1.500 vdc ? integrated lc emi filter ? synchronizabl e ? fully protected by independant security ? under & overvoltage lock-out? overvoltage protection ? current limitation protection ? overtemperature protection ? no optocoupler for high reliability? leaded process gaia converter fc03-032.01/10 revision i ? redefining the source of power 1-general 5:1 ultra wide input single output metallic case - 1.500 vdc isolation hi-relgrade for locations, phone, fax, e-mail see back cover 2-product selection input v oltage range b : 3.3 vdcc : 5 vdc e : 12 vdc f : 15 vdc i : 24 vdc j : 28 vdc permanent h : 9-45 vdco : 16-80 vdc output 4 the mgdm-75 series is a complete line of highdensity wide input range dc/dc power modules designed for aerospace, military and high-end industrial applications. these modules use a patented fixed switching topology at 420 khz providing ultra wide input range, low noise char acteristi cs an d hi gh power d en sity . stan d ar d models are available with ultra wide input vol-tage range of 9-45, 16-80 volts. the series include single output voltage choices of 3.3, 5, 12, 15, 24, 28 volts. the mgdm-75 series include synchronization, trim and sense functions. the synchronization function allows to synchronize more than one converter to one frequency or an e xtern al sour ce fr equen cy . all the modules are designed with lc network filters to minimize reflected input current rippleand output voltage ripple. the modules have totally independant security functions including input undervoltage lock-out, output overvoltage protection, output current limitation protection, and temperature protec- tion . additionnally a soft-start function allows current limitation and eliminates inrush currentduring start-up. the design has been carried out with surface mount components, planar transformer and is manufactured in a fully automated process to gu ar an tee hi gh qu ality . th e m od ules ar e potted with a bi-component thermal conductivecompound and used an insulated metallic subs- trat to ensure optimum power dissipation under harsh environmental conditions. options : /t : option for -55c start up operating temperature /s : option for screening and serialization mgds - 75 - option / input output
for locations, phone, fax, e-mail see back cover 2 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 2- product selection (continued) current 15 a 12,5 a6,25 a 5 a 3,125 a 2,7 a 15 a15 a 6,25 a 5 a 3,125 a 2,7 a reference mgds-75-h-b mgds-75-h-cmgds-75-h-e mgds-75-h-f mgds-75-h-i mgds-75-h-j mgds-75-o-b mgds-75-o-cmgds-75-o-e mgds-75-o-f mgds-75-o-i mgds-75-o-j output 3.3 vdc 5 vdc 12 vdc15 vdc 24 vdc 28 vdc 3.3 vdc 5 vdc 12 vdc15 vdc 24 vdc 28 vdc input range 9-45 vdc9-45 vdc 9-45 vdc 9-45 vdc 9-45 vdc 9-45 vdc 16-80 vdc16-80 vdc 16-80 vdc 16-80 vdc 16-80 vdc 16-80 vdc options /t , /s/t , /s /t , /s /t , /s /t , /s /t , /s /t , /s /t , /s /t , /s /t , /s /t , /s /t , /s converter selection chart mgd s - 75 - o - e / t number of outputs :s : single output input voltage range : h : 9-45 vdc o : 16-80 vdc output voltage : see table page 1 option :(/t) : -55c start up (/s) : screening & serialization (consult application note ?screening grades?)
for locations, phone, fax, e-mail see back cover 3 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 3- block diagram the mgdm-75 dc/dc converter is based on a cons- tant 420khz pulse-width modulated forward topology designed for ultra large input range . the output voltage is monitored on the secondaryside avoiding the use of optocoupler to optimize long-term reliability and provide good immunity against radiations.an auxilliary supply is implemented to feed independently all security functions such as the input undervoltage lock-out (uvlo), the output overload protection (ocp), the ouput overvoltage protection (ovp) and the thermal protection (otp). as this auxilliary power is independent from the mainpower supply , th e m od ule featur es a wide trim windows from 90% to 110% of the nominal output voltage.the main power transformer designed for more than 75w power is a multi-layer planar transformer which allows 100% reproductibility for optimized module efficiencies. the controlled feedback regulation is located at the secondary side allowing a high regulation bandwidth and a very fast response to load changes. uvlo thermal shutdown ovp lc output filter lc input filter mosfet driver current sense power stage auxilliary supply feed-back function vin on/off sync vo trim isolation barrier control circuit sense
for locations, phone, fax, e-mail see back cover 4 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 note * : these performances are measured with the sense line connected..note ** : it is recommended to mount the converter on a heatsink for this test, see section 10-3 and 10-9 for further details. note *** : the ripple output voltage is the periodic ac component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered. this noise can be reduced by adding 4 external decoupling capacitors connected between inputs and case and between outputs and case. these capacitance should be layed-out as close as possible from the converter . please refer to page 8 f or more details . 4- electrical specifications data are valid at +25c, unless otherwise specified. parameter conditions limit or typical units single output mgds-75 75 - h 75 - o input nominal input voltage full temperature range nominal v dc 24 28 permanent input voltage range (ui) full temperature range min. - max. vdc 9 - 45 16 - 80 undervoltage lock-out (uvlo) turn-on voltage maximum v dc 10,5 16 start up time ui nominal nominal output full load : resistive maximum ms 30 30 reflected ripple current ui nominal, full load bw = 20mhz maximum mapp 500 500 input current in short circuit mode (average) ui nominal short-circuit typical a 1 0,2 no load input current ui nominal no load maximum ma 30 30 input current in inhibit mode ui nominal inhibit maximum ma 10 10 output output voltage * ui min. to max. nominal nominal nominal nominal nominal nominal vdc vdc vdc vdc vdc vdc 3,3 5 12 15 24 28 3,3 5 12 15 24 28 set point accuracy * ambient temperature : +25c ui nominal, 75% load maximum % +/- 2 +/- 2 output power at 105c baseplate ui min. to max. maximum w 50 to 75 50 to 75 output current 3,3v output 5v output 12v output 15v output 24v output 28v output full temperature range ui min. to max. maximum maximum maximum maximum maximum maximum aa a a a a 15 12,5 6,25 5 3,125 2,7 15 15 6,25 5 3,125 2,7 ripple output voltage 3,3v and 5v output 12v output 15v output 24v and 28v output ui nominal full load bw = 20mhz typical typical typical typical mvpp mvpp mvpp mvpp 50 100 150 250 50 100 150 250 output regulation * (line + load + thermal) ui min. to max. 0% to full load maximum % +/- 1 +/- 1 output voltage trim as function of output voltage minimum maximum %% 90 ** 110 90 ** 110 efficiency ui nominal full load typical % please consult factory
for locations, phone, fax, e-mail see back cover 5 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 5 10 15 20 25 30 35 40 45 58% 60% 63% 65% 68% 70% 73% 75% 78% 80% 83% 85% 88% typical efficiency mgds75hj at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 5 10 15 20 25 30 35 40 45 73% 74% 75% 76% 77% 78% 79% 80% 81% 82% 83% 84% 85% 86% 87% 88% 89% typical efficiency mgds75hf at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 5 10 15 20 25 30 35 40 45 68% 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% typical efficiency mgds75he at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 5 10 15 20 25 30 35 40 45 60% 63% 65% 68% 70% 73% 75% 78% 80% 83% typical efficiency mgds75hc at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 5 10 15 20 25 30 35 40 45 60% 63% 65% 68% 70% 73% 75% 78% 80% 83% typical efficiency mgds75hb at 25c 10w 20w 30w 40w 50w input voltage vin (vdc) 4- electrical characteristics (continued) 5 10 15 20 25 30 35 40 45 60% 63% 65% 68% 70% 73% 75% 78% 80% 83% 85% 88% 90% typical efficiency mgds75hi at 25c 15w 30w 45w 60w 75w input voltage vin (vdc)
for locations, phone, fax, e-mail see back cover 6 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 10 20 30 40 50 60 70 80 68% 70% 73% 75% 78% 80% 83% 85% 88% 90% typical efficiency mgds75oj at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 10 20 30 40 50 60 70 80 68% 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% typical efficiency mgds75oe at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 10 20 30 40 50 60 70 80 71% 72% 73% 74% 75% 76% 77% 78% 79% 80% 81% 82% 83% 84% 85% 86% typical efficiency mgds75oc at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 4- electrical characteristics (continued) 10 20 30 40 50 60 70 80 60% 63% 65% 68% 70% 73% 75% 78% 80% 83% 85% 88% 90% typical efficiency mgds75oi at 25c 15w 30w 45w 60w 75w input voltage vin (vdc) 10 20 30 40 50 60 70 80 70% 71% 72% 73% 74% 75% 76% 77% 78% 79% 80% 81% 82% 83% 84% typical efficiency mgds75ob at 25c 10w 20w 30w 40w 50w input voltage vin (vdc) 10 20 30 40 50 60 70 80 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% 90% typical efficiency mgds75of at 25c 15w 30w 45w 60w 75w input voltage vin (vdc)
for locations, phone, fax, e-mail see back cover 7 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 5- switching frequency7- protection functions characteristics protection device recovery limit or ty pical specifications input undervoltage lock-out (uvlo) turn-on, turn-off circuit with hysteresis cycle automatic recovery turn-on nominal turn-off nominal see section 4 output current limitation protection (ocp) straight line current limitation automatic recovery nominal 110% of output current output overvoltage protection (ovp) overvoltage protection device with latch-up automatic recovery nominal 120% of output voltage over temperature protection (otp) thermal device with hysteresis cycle automatic recovery nominal 115c 8- reliability data parameter conditions limit or typical specifications switching frequency full temperature range ui min. to max. no load to full load nominal, fixed 420 khz 6- isolation characteristics conditions temperature specifications mean time between failure (mtbf) according to mil-hdbk-217f ground fixed (gf) case at 40c case at 85c 700.000 hrs 190.000 hrs airborne, inhabited, cargo (aic) case at 40c case at 85c 390.000 hrs 125.000 hrs mean time between failure (mtbf) according to iec-62380-tr avionics military cargo / consult factory parameter conditions limit or typical specifications electric strength test voltage input to output input to case output to case minimum minimum minimum 1.500 vdc / 1 min 1.500 vdc / 1 min 1.500 vdc / 1 min isolation resistance 500 vdc minimum 100 mohm
for locations, phone, fax, e-mail see back cover 8 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 9- electromagnetic interferenceelectromagnetic interference requirements according to mil-std-461c/d/e standards can be easily achieved as indicated in the following section. the following table resumes the different sections covered by these standards. 9-1 module compliance with mil-std-461c/d/e standards t o m eet th e latest u s military stan d ar ds mil-std-461d/e (an d also th e mil-std-461c) r equir em en ts an d in parti cular th e conducted noise emission ce102 (and also ce03) requirements, ga?a converter can propose a stand-alone ready-to-use emifilter module. this emi filter module has to be used together with 4 external decoupling capacitance c c (10nf/rated voltage depending on isolation requirement) connected between input and case and output and case.emi filter m od ule r efer en ce : fgds-20a -50v . please consult emi filter datasheet for further details. standard requirements mil-std-461c standard mil-std-461d/e standard compliance with gaia converter module & common mode capacitance conducted emission (ce) : low frequency high frequency ce 01 ce 03 ce 101 ce 102 compliant module stand-alone compliant with additionnal filter conducted susceptibility (cs) : low frequency high frequency cs 01 cs 02 cs 101 cs114 compliant with additionnal filter compliant with additionnal filter radiated emission (re) : magnetic field electrical field re 01 re 02 re 101 re 102 compliant module stand-alone compliant module stand-alone radiated susceptibility (rs) : magnetic field electrical field rs 01 rs 03 rs 101 rs 103 compliant module stand-alone compliant module stand-alone applicability h, o input module h, o input module see emi datasheet cc cc cc cc bp bp mgdm-series gi vi vo go bp bp bp: base plate emi input filter go vo gi vi
for locations, phone, fax, e-mail see back cover 9 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 10- thermal characteristics characteristics conditions limit or typical performanc es operating ambient temperature range at full load ambient temperature * minimum maximum - 40c see section 10-9 baseplate temperature base plate temperature minimum maximum - 40c + 105c storage temperature range non functionning minimum maximum - 55c + 125c thermal resistance baseplate to ambient rth(b-a) free air typical 11c/w note * : the upper temperature range depends on configuration, the user must ensure a max. baseplate temperature of + 105c. the mgdm-75 series maximum baseplate temperature at full load must not exceed 105c. heat can be removedfrom the baseplate via three basic mechanisms : ? radiation transfert : radiation is counting for lessthan 5% of total heat transfert in majority of case, for this reason the presence of radient cooling is used as a safety margin and is not considered. ? conduction transfert : in most of the applications, heat will be conducted from the baseplate into an attached heatsink or heat conducting member; heat is conducted thruthe interface. ? convection transfert : convecting heat transfer into air refers to still air or forced air cooling. in majority of the applications, heat will be removed fromthe baseplate either with : ? heatsink,? forced air cooling, ? both heatsink and forced air cooling. t o calculate a m axim um ad missible ambi en t temper atur e the following method can be used.knowing the maximum baseplate temparature tbase = 105c of the module, the power used pout and the efficienc y : ? determine the power dissipated by the module pdissthat should be evacuated : pdiss = pout(1/ ? ? - 1) (a) ? determine the maximum ambient temperature : t a = 105c - rth(b-a) x pdiss (b) where rth(b-a) is the thermal resistance from the baseplate to ambient . this thermal rth(b-a) resistance is the summ of : ? the thermal resistance of baseplate to heatsink (rth(b-h)). the interface between baseplate and h eatsink can be n othin g or a con du ctin g m ember , a thermal compound, a thermal pad.... the value ofrth(b-h) can range from 0.4c/w for no interface down to 0.1c/w for a thermal conductive member inter- face. ? the thermal resistance of heatsink to ambient air (rth(h-a)) , which is depending of air flow and given by h eatsink suppli er . the table hereafter gives some example of thermal resistance for different heat transfert configurations. radian and thermaflo are heasink manufacturers. ?silpad? ? is a registered trademark of bergquist. note* : silpad performance are for silpad 400 with pressure conditions of 50 psi. surface of mgds-75 series is 3,3 inch2. heat transfert thermal resistance heatsink to air rt h(h-a) thermal resistance baseplate to heatsink global resistance free air cooling only no heatsink baseplate only : 11c/w no need of therm al pad 11c/w heatsink thermaflo 4245ooboooo : 7,64c/w bergquist s ilpad* : 0,21c/w 7,85c/w heatsink thermaflo 4248ooboooo : 3,5c/w bergquist si lpad* : 0,21c/w 3,71c/w forced air cooling 200 lfm no heatsink baseplate only : 6,9c/w no need of therm al pad 6,9c/w heatsink radian hs1568ex : 3,5c/w bergquist silpad* : 0,21c/w 3,71c/w heatsink thermaflo 4248ooboooo : 2,8c/w bergquist si lpad* : 0,21c/w 3,01c/w forced air cooling 400 lfm no heatsink baseplate only : 4,8c/w no need of therm al pad 4,8c/w heatsink radian hs1568ex : 2c/w bergquist silpad* : 0,21c/w 2,21c/w heatsink thermaflo 4248ooboooo : 1,8c/w bergquist si lpad* : 0,21c/w 2,01c/w forced air cooling 1000 lfm no heatsink baseplate only : 2,8c/w no need of therm al pad 2,8c/w heatsink thermaflo 4248ooboooo : 1c/w bergquist silp ad* : 0,21c/w 1,21c/w
for locations, phone, fax, e-mail see back cover 10 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 10- thermal characteristics (continued)the two formulas (a) and (b) described in previous page : ? pdiss = pout(1/ ? ? - 1) (a) ? t a = 105c - rth(b-a) x pdiss (b) conduct to curves determining the ambient temperatureadmissible as a function of output power for various heat transfert conditions. in parti cular , as e x ample th e f ollowin g typi cal curves ar e calculated with : ? no heatsink? a thermaflo heatsink reference 424800b0000 and a bergquist ?silpad? for various cooling conditions. 0 10 20 30 40 50 60 70 80 90 100 110 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 mgds-75-h-x series thermal curves no heatsink no heatsink 200lfm no heatsink 400 lfm heatsink 1000 lfm heatsink heatsink 200 lfm heatsink 400 lfm heatsink 1000 lfm ambient temperature (c) output power (w) 0 10 20 30 40 50 60 70 80 90 100 110 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 mgds-75-o-x series thermal curves no heatsink no heatsink 200lfm no heatsink 400 lfm heatsink 1000 lfm heatsink heatsink 200 lfm heatsink 400 lfm heatsink 1000 lfm ambient temperature (c) output power (w)
for locations, phone, fax, e-mail see back cover 11 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 11- environmental qualificationsthe modules have been subjected to the following environmental qualifications. characteristics conditions severity test procedure climatic qualifications life at high temperature duration temperature / status of unit test d : 1.000 hrs @ 105c case, unit operating @ 125c ambient, unit not operating mil-std-202g method 108a altitude altitude level c duration climb up stabilization status of unit 40.000 ft@-55c 30 min. 1.000 ft/min to 70.000 f@-55c, 30 min. unit operating mil-std-810e method 500.3 humidity cyclic number of cycle cycle duration relative humidity variation temperature variation status of unit 10 cycle i : 24 hrs 60 % to 88 % 31c to 41c unit not operating mil-std-810e method 507.3 humidity steady damp heat temperature duration status of unit 93 % relative humidity 40c 56 days unit not operating mil-std-202g method 103b salt atmosphere temperature concentration nacl duration status of unit 35c 5 % 48 hrs unit not operating mil-std-810e method 509.3 temperature cycling number of cycles temperature change transfert time steady state time status of unit 200 -40c / +85c 40 min. 20 min. unit operating mil-std-202a method 102a temperature shock number of shocks temperature change transfert time steady state time status of unit 100 -55c / +105c 10 sec. 20 min. unit not operating mil-std-202g method 107g mechanical qualifications vibration (sinusoidal) number of cycles frequency / amplitude frequency / acceleration duration status of unit 10 cycles in each axis 10 to 60 hz / 0.7 mm 60 to 2000 hz / 10 g 2h 30 min. per axis unit not operating mil-std-810d method 514.3 shock (half sinus) number of shocks peak acceleration duration shock form status of unit 3 shocks in each axis 100 g 6 ms 1/2 sinusoidal unit not operating mil-std-810d method 516.3 bump (half sinus) number of bumps peak acceleration duration status of unit 2000 bumps in each axis 40 g 6 ms unit not operating mil-std-810d method 516.3
for locations, phone, fax, e-mail see back cover 12 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 12- description of protections12-2 output over current protection (ocp) the mgdm-75 series incorporates a staight line current limit and protection circuit. when the output current reaches 110% of it?s full-rated current (icurrent limit), the output voltage falls and output current falls along the vertical line as described in the figure herein. the module restart automatically to nor- mal operation when overcurrent is removed. 12-3 output overvoltage protection (ovp) each circuit has an internal overvoltage protection circuit that monitors the voltage accross the output power terminals. it is designed to turn the converter off at 120% (+/-5%) of output voltage.once in ovp protection, the module will restart automatically when overvoltage is removed. the mgdm-75 series include 3 types of protection devices thatare powered and controlled by a fully independant side power stage. 12-4 ov er t emper atur e pr otection (o tp) a thermal protection device adjusted at 115c (+/-5%) internaltemperature with 10c hysteresis cycle will inhibit the mo- dule as long as the overheat is present and restores to nor- mal operation automatically when overheat is removed. the efficiency of the otp function is warranty with the module mounted on a heatsink. iout vout icurrent limit 110% of full rated current 130% of full rated current baseplate temperature on 115 ?c off 10?c 12-1 input undervoltage lockout (uvlo) 12-1-1 undervoltage lockout (uvlo) an undervoltage protection will inhibit the module when inputvoltage drops below the lockout turn-off threshold (see sec- tion 4 for value) and restores to normal operation automatically when the input voltage rises the lockout turn-on threshold. vin on off uvlo turn-on 1,5v
for locations, phone, fax, e-mail see back cover 13 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 13- description of functions13-1 trim function the output voltage vo may be trimmed in a range of 90%/110% of the nominal output voltage via a single externaltrimpot or fix ed r esistor . trim up functiondo not attempt to trim the module higher than 110% of nominal output voltage as the overvoltage protection may occur . also do not exceed the maximum rated output power whenthe module is trimmed up. the trim up resistor must be connected to s+ pin. the trim up resistance must be calculated with the following formula : ru = r1 (v0-vref)v0nom - r1 - r2 (v0-v0nom)vref trim down functiondo not trim down more than -10% of nominal output vol- tage. the available output power is reduced by the same percentage that output voltage is trimmed down. the trim down resistor must be connected to s- pin. the trim down resistance must be calculated with the following formula : rd = (r2 + r1)v0- r2v0nom v0nom - v0 trim via a voltagethe output voltage is given by the following formula : v0 = 1 + r1 ( vtrim - 1) (r1 + r2) vref parameter unit min. typ. max. trim reference vdc 2,45 2,5 2,55 resistor r1 ohm / 3800 / resistor r2 ohm / 270 / trim capacitor f / 1 / mgdm75 s- gin vin vo on/off go trim s+ sync 42 31 56 7 9 8 load ru r1 r2 1f vref= 2.5v error amp. vcontrol 100nf bat54 mgdm75 s- gin vin vo on/off go trim s+ sync 42 31 56 7 9 8 load rd r1 r2 1f vref= 2.5v error amp. mgdm75 s- gin vin vo on/off go trim s+ sync 42 31 56 7 9 8 load ru r1 r2 1f vref= 2.5v error amp.
for locations, phone, fax, e-mail see back cover 14 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 13- description of functions (continued)13-3 on/off function the control pin 3 (on/off) can be used for applications requiring on/off operation. this may be done with an open collector tr an sistor , a switch, a r elay or an optocoupler . s ever al converters may be disabled with a single switch by connectingall on/off pin s tog eth er . ? the converter is disabled by pulling low the pin 3.? no connection or high impedance on pin 4 enables the converter . by releasing the on/off function, the converter will restartwithin the start up time specifications given in table section 3. for further details please consult ??logic on/off?? a pplication n ote. 13-4 synchronization functionan external clock with rectangular ?pull up? signals can be used to lock one or more converters. the external clock si-gnal should have a frequency range from 860khz to 940khz, a low level below 0,5v a high level of 4v (+/-0.5v), a rise time of 30 ns max. and a drop time of 100ns max.. parameter unit min. typ. max. notes, conditions on/off module enable voltage vdc 2 / 4,5 open, the switc h must not sink more than 100a on/off module disable voltage vdc 0 / 0.5 the switch mus t be able to sink 1ma on/off module enable delay ms / / 30 the module restarts with the same delay after alarm mode removed on/off module disable delay s / / 100 vi nominal, full load vin 4v +/- 0,5 t/2 vsync 0v 100ns max 30ns max t ( 860khz < f < 940khz ) 13-2 sense functionif the load is separated from the output by any line lenght, some of these performance characteristics will be degraded at the load terminals by an amount proportional to the impedance of the load leads. sense connections enable to compensate the line drop at a maximum of +/-10% of output voltage. the overvoltage protection will be activated and module will shut down if remote sense tries to boost output voltage above 110% of nominal output voltage. connection is described in figure herein. mgdm75 s- gin vin vo on/off go trim s+ sync 42 31 56 7 9 8 load bp load totem pole output gi vi 100pf 1n4148 4.7k ext. clock mgdm75 s- gin vin vo on/off go trim s+ sync 42 3 1 56 7 9 8 bp load on/off gi vi mgdm75 s- gin vin vo on/off go trim s+ sync 42 31 56 7 9 8
for locations, phone, fax, e-mail see back cover 15 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 14- application notes14-1 synchronization of modules the mgdm-75 series provides a synchronization function trough the pin 2 (synchro) to enable automatic synchroni- sation between several converters. if several converters are used, they lock themselves into th e hi gh est switchin g fr equen cy . the synchronization signal available on pin 2 is referencedto ground in (gi) and the signal shape is the double of the switching frequency (i.e 2x420khz). it is a rectangular signal with 3.5 vp (+/-0.5v) amplitude with an impedance of 4,7 kohm on low level. 14-2 connection of modules in series the output of single output units can be connected in series without any precautions to provide higher output voltage level. nevertheless, gaia converter recommends to protect each individual output by a low power shottky diode rated with the maximum current of the converter to avoid reverse polarity at any output. reverse polarity may occur at start up if the output volta- ges do not rise at the same time. 10nf 10nf 10nf 10nf bp bp (*) bp: base plate 10nf 10nf 10nf 10nf 100f bp bp (*) 100f mgdm75 s- gin vin vo on/off go trim s+ sync 42 3 1 56 7 9 8 mgdm75 s- gin vin vo on/off go trim s+ sync 42 3 1 56 7 9 8 10nf 10nf 10nf 10nf bp bp (*) bp: base plate 10nf 10nf 10nf 10nf bp bp (*) mgdm75 s- gin vin vo on/off go trim s+ sync 42 3 1 56 7 9 8 mgdm75 s- gin vin vo on/off go trim s+ sync 42 3 1 56 7 9 8 on/off
for locations, phone, fax, e-mail see back cover 16 hi-relgrade mgdm-75 series gaia converter fc03-032.01/10 revision i ? 4 11- dimensions dim en si on s ar e given in mm (in ch es). t oler an ce : +/- 0,2 mm (+/- 0.01 ?) unless oth erwise in di cated . weight : 70 grams (1.95 ozs) max. 14- connections use this side for heat sinking 5.6 min (0,22) 6.8 max (0,267) 12.7 max (0,5) 0.5 (0,019) mouting hole 0 3,1 (0.122) 3,81 (0.15) 10,795 (0.425) 9,894 (0.39) 26,16 (1.03) 36,83 (1.45) r2,4 (0.1) ch 2x2 57,912 (2.28) 9,589 (0.38) 3,81 (0.15)3,81 (0.15) 3,81 (0.15) 47,24 (1.86) 50,8 (2.00) 3,56 (0.14)3,56 (0.14) pin dimensions : pins : 1, 2, 3, 4, 7, 8 : ? 1 mm (0.04?) pins : 5, 9 : ? 1,5 mm (0.059?) 2 4 3 1 8 5 6 9 7 bottom view pin single output 1 - input (gi) 2 synchro (sync) 3 on/off 4 + input (vi) 5 + output (vo) 6 sense + (s+) 7 trim (trim) 8 sense - (s-) 9 - output (go) 12- materialsframe : aluminium alodined coating. baseplate : copper with tin finishing. pins : plated with pure matte tin over nickel underplate. 13- product marking upper face : company logo, location of manufacturing. side face : module reference, option, date code : year and week of manufacturing.
inf orm ati on given in this d atash eet is beli eved to be accur ate an d r eli able . h owever , n o r espon sibility is assum ed f or th e con sequen ce o f its use n or f or an y infrin g em en t o f paten ts or oth er ri gh ts o f thir d parti es whi ch m ay r esult fr om its use . these products are sold only according to gaia converter general conditions of sale, unless otherwise confirmed by writing. specifications subject to change without notice. printed in france by gaia converter fc03-032.01/10 revision i graphisme : philippe clicq represented by : for more detailed specifications and applications information, contact : international headquarters ga?a converter - france zi de la morandire 33185 le haillan - france t el. : + (33)-5-57-92-12-80 fax : + (33)-5-57-92-12-89 north american headquartersga?a converter canada, inc 4038 le corbusier blvd la v al, quebec - canad a h7l 5r2 t el. : (514)-333-3169 fax : (514)-333-4519

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Price & Availability of MGDS-75-H-ET

	To Download MGDS-75-H-ET Datasheet File
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