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hi-rel dc/dc converter mgdm-20 : 20w power ? 28vdc input compliant with mil-std-704 d/e nominal power up to 20 w wide temperature range : -40c/+105c case high efficiency (typ. 84%) soft start galvanic isolation 1.500 vdc integrated lc emi filter permanent short circuit protection no optocoupler for high reliability gaia converter fc98-016.08/04 revision i ? redefining the source of power 1-general single, bi & triple outputs metallic case - 1.500 vdc isolation hi-rel grade for locations, phone, fax, e-mail see back cover 2-product selection input voltage range b : 3.3 vdc c : 5 vdc or +/-5vdc e : 12 vdc or +/-12vdc f : 15 vdc or +/-15vdc be : 3,3 vdc and +/-12 vdc bf : 3,3 vdc and +/-15 vdc ce : 5 vdc and +/-12 vdc cf : 5 vdc and +/-15 vdc output the mgdm-20 series is a complete line of high performance dc/dc power modules designed for aerospace, military and high-end industrial ap- plications. these modules use a high frequency fixed swiching technic at 500khz providing ex- cellent reliability, low noise characteristics and high power density. standard models are available with standard input voltage range of 4.5-5.5, 9-36 and 16-40 volts. the series include single bi and triple output voltage choices of 3,3 , 5, 12, 15 volts. no external heatsink is required for the mgdm- 20 series to supply 20w output power over the full temperature range. all the modules are designed with lc network filters to minimize reflected input current ripple and output voltage ripple. the modules include a soft-start, and a perma- nent short circuit protection to ensure efficient module protection. the soft-start allows current limitation and eliminates inrush current during start-up. the short circuit protection completely protects the modules against short-circuits of any duration by a shut-down and restores to normal when the overload is removed. the design has been carried out with surface mount components and is manufactured in a fully automated process to guarantee high quality. each module is tested with a gaia converter automated test equipment.the modu- les are potted with a bi-component thermal conductive compound and packaged in a metallic case to ensure the module?s integrity under high environmental conditions. single output model : mgds-20- (/t) and/or (/s) bi output model : MGDB-20- (/t) and/or (/s) triple output model : mgdt-20- (/t) and/or (/s) (/t) : option for -55c start up operating temperature (/s) : option for screening and serialization permanent c : 4,5-5,5 vdc h : 9-36 vdc j : 16-40 vdc transient n/a 40 vdc/100 ms* 50 vdc/100 ms* * consult factory for details 4
for locations, phone, fax, e-mail see back cover 2 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 2- product selection (continued) current 4 a 4 a 1,6 a 1,3 a 4 a 4 a 1,6 a 1,3 a +/- 2a +/- 0,8 a +/- 0,65 a 2 a & +/- 0,4 a 2 a & +/- 0,3 a 2 a & +/- 0,4 a 2 a & +/- 0,3 a 4 a 4 a 1,6 a 1,3 a +/- 2a +/- 0,8 a +/- 0,65 a 2 a & +/- 0,4 a 2 a & +/- 0,3 a 2 a & +/- 0,4 a 2 a & +/- 0,3 a reference mgds-20-c-b mgds-20-c-c mgds-20-c-e mgds-20-c-f mgds-20-h-b mgds-20-h-c mgds-20-h-e mgds-20-h-f MGDB-20-h-c MGDB-20-h-e MGDB-20-h-f mgdt-20-h-be mgdt-20-h-bf mgdt-20-h-ce mgdt-20-h-cf mgds-20-j-b mgds-20-j-c mgds-20-j-e mgds-20-j-f MGDB-20-j-c MGDB-20-j-e MGDB-20-j-f mgdt-20-j-be mgdt-20-j-bf mgdt-20-j-ce mgdt-20-j-cf output 3,3 vdc 5 vdc 12 vdc 15 vdc 3,3 vdc 5 vdc 12 vdc 15 vdc +/- 5 vdc +/- 12 vdc +/- 15 vdc 3,3 & +/- 12 vdc 3,3 & +/- 15 vdc 5 & +/- 12 vdc 5 & +/- 15 vdc 3,3 vdc 5 vdc 12 vdc 15 vdc +/- 5 vdc +/- 12 vdc +/- 15 vdc 3,3 & +/- 12 vdc 3,3 & +/- 15 vdc 5 & +/- 12 vdc 5 & +/- 15 vdc input range 4,5-5,5 vdc 4,5-5,5 vdc 4,5-5,5 vdc 4,5-5,5 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 9-36 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 vdc 16-40 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 /t , /s /t , /s /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 mgds - 20 - h - c / t number of outputs : s : single output b : bi ouput t : triple output input voltage range : c : 4,5-5,5 vdc h : 9-36 vdc j : 16-40 vdc output voltage : see table page 1 option : /t : -55c start up operation /s : screening and serialization (consult application note ?screening grades?)
for locations, phone, fax, e-mail see back cover 3 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 3- electrical specifications data are valid at +25c, unless otherwise specified.

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c c % % % note * : for proper operation the mgdm-20 module requires to install a 22f chemical or tantalum capacitor accross output te rminal. note ** : for 9-36v input range, the current is derated at 80% at 9v and increases linearly to full current at 12v. note*** : the ripple output voltage is the periodic ac component imposed on the output voltage, an aperiodic and random compone nt (noise) has also to be considered. this noise can be reduced by adding an external capacitance (typically 10nf/rated voltage depending on isolation requirement) connected between the pin gin and the pin gout of the converter.this capacitance should be layed-out as close as possible from the converter.
for locations, phone, fax, e-mail see back cover 4 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 3- electrical characteristics (continued) data are valid at +25c, unless otherwise specified.

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for locations, phone, fax, e-mail see back cover 5 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 3- electrical characteristics (continued) data are valid at +25c, unless otherwise specified.
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c c $$ $$ note * : for proper operation the mgdm-20 module requires to install a 22f chemical or tantalum capacitor accross output te rminal. note ** : for 9-36v input range, the current is derated at 80% at 9v and increases linearly to full current at 12v. note*** : the ripple output voltage is the periodic ac component imposed on the output voltage, an aperiodic and random compone nt (noise) has also to be considered. this noise can be reduced by adding an external capacitance (typically 10nf/rated voltage depending on isolation requirement) connected between the pin gin and the pin gout of the converter.this capacitance should be layed-out as close as possible from the converter.
for locations, phone, fax, e-mail see back cover 6 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 3- electrical characteristics (continued) 3.3 6.6 9.9 13.2 output power (w) (mgds-20-c-b module) figure 1 : typical efficiency versus load at nominal input efficiency (%) 76 74 72 70 68 66 input 5v 84 83 82 80 79 78 5 10 1 5 20 output power (w) (mgds-20-c-c module) figure 2 : typical efficiency versus load at nominal input efficiency (%) input 5v 5 10 15 20 output power (w) (mgds-20-c-e module) figure 3 : typical efficiency versus load at nominal input efficiency (%) 83 80 77 74 71 68 65 input 5v 5 10 15 20 output power (w) (mgds-20-j-b module) figure 4 : typical efficiency versus load at nominal input efficiency (%) 83 80 77 74 71 68 65 input 16v input 40v input 28v 5 10 15 20 output power (w) (mgds-20-j-c module) figure 5 : typical efficiency versus load at nominal input efficiency (%) 85 82 79 76 73 70 67 input 28v input 16v input 40v 5 10 15 20 output power (w) (mgds-20-j-e module) figure 6 : typical efficiency versus load at nominal input efficiency (%) 88 85 82 79 76 73 70 input 28v input 16v input 40v 5 10 1 5 20 output power (w) (mgds-20-j-f module) figure 7 : typical efficiency versus load at various input efficiency (%) 88 85 82 79 76 73 70 input 40v input 28v input 16v 5 10 1 5 20 output power (w) (mgdt-20-j-ce module) figure 8 : typical efficiency versus load at various input efficiency (%) 86 83 80 77 74 71 68 input 40v input 28v input 16v 5 10 1 5 20 output power (w) (MGDB-20-j-f module) figure 9 : typical efficiency versus load at various input efficiency (%) 88 85 82 79 76 73 70 input 40v input 28v input 16v 5 10 1 5 20 output power (w) (mgds-20-j-c module) figure 10 : typical load regulation characteristics at nominal input output voltage (vdc) 5,3 5,2 5,1 5,0 4,9 4,8 4,7 input 28v 5 10 1 5 20 output power (w) (mgds-20-j-e module) figure 11 : typical load regulation characteristics at nominal input output voltage (vdc) 12,3 12,2 12,1 12,0 11,9 11,8 11,7 input 28v 5 10 1 5 20 output power (w) (mgds-20-j-f module) figure 12 : typical load regulation characteristics at nominal input output voltage (vdc) 15,3 15,2 15,1 15,0 14,9 14,8 14,7 input 28v
for locations, phone, fax, e-mail see back cover 7 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 4- functional characteristics 6- environmental and electromagnetic interference qualification 5- thermal and reliability characteristics "
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for locations, phone, fax, e-mail see back cover 8 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 a basic configuration with module stand alone and common mode noise capacitance c c connected between gin and gout will conduct to the results described in the previous table. this common mode noise capacitance c c (10nf/rated voltage depending on isolation requirement) should be layed-out as close as possible from the dc/dc converter. to meet mil-std-461 c requirements and in particular ce 03, ga?a converter recommends the use of front filter kg9501 together with the common mode noise capacitance c c (10nf/rated voltage depending on isolation requirement) connected between gin and gout. please consult kg9501 datasheet for further details. 6-1 basic configuration : module stand alone with common mode noise capacitance 6-2 configuration with module and front filter kg9501 common mode noise capacitance c = 10nf c - input + input mgdm - series vi vo gi go *common mode noise capacitance c = 10nf c mgdm-series + input - input d1 l1 l2 l3 c2 r2 c1 r1 c4 r4 c3 r3 c6 gi c5 vi go vo % !&'(

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)&!e78&f78 0.& 0.$ 0.& 0.$ 0.& 0.$ 6- environmental and electromagnetic interference qualification (continued) electromagnetic interference requirements according to mil-std-461 c and mil-std-461 d can be easily achieved as indicated in the following table. compliance to these requirements apply to j serie or h serie of dc/dc modules.
for locations, phone, fax, e-mail see back cover 9 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i ? 4 7- application notes 7-1 short circuit protection the short circuit protection device protects the modules against short circuits of any duration and restores the module to normal operation when the short circuit is removed. 7-2 custom output any of the bi output converters can be configured to produce an output of 10v (+/-5 output models), 24v (+/-12v output models), or 30v (+/-15v output models) by connecting the load across the output (+) and the output (-) with either output grounded, and leaving the common pin floating. 7-3 on/off function the control pin 4 (on/off) can be used for applications requiring on/off operation. by using an open collector command with a transistor q referenced to the common terminal (gi) : a logic pulled low (<0.2v@1ma, referenced to gi) on pin 4 disables the converter no connection or high impedance on pin 4 enables the converter. for further details please consult ?? logic on/off ?? applica- tion note. 2 4 on/off gi command 100k 10 100 30 110 80 70 60 90 20 40 50 25% 75% 50% 100% 85?c 105?c power (w) temperature (?c) natural convection max. case temperature 7-4 ambient versus case temperature the mgdm-20 series operating case temperature at full load must not exceed 105?. the maximum ambient temperature admissible for the dc/dc converter corresponding to the maximum operating case temperature of 105? depends on the ambient airflow, the mounting/ orientation, the cooling features and the power dissipated. thermal calculation shows two areas of operation : ?a normal operation area in a free natural ambient convection (grey area in this following graph), ?an area with cooling features (air flow or heatsink) ensuring a maximum case temperature below the maximum operating case temperature of 105? at full load (white area in the following graph). by releasing the on/off function, the converter will restart within the start-up time specifications given in table page 3.
for locations, phone, fax, e-mail see back cover 10 hi-rel grade mgdm-20 series gaia converter fc98-016.08/04 revision i 4 8- dimensions 9- product marking upper face : company logo, location of manufacturing, module reference. date code : year and week of manufacturing. 10- connections dimension are given in mm (inches). tolerance : +/- 0,2 mm (+/- 0.01 ? unless otherwise indicated. weight : 80 grams (2.8 ozs) max. 1234 56 78 bottom view ! & ? ? ? f f f $
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( ! :-:** :-:** :-:** ++) :?? :?? % : f :&& < f : f ++) ++) : metallic case black anodized coating solder plated pin pin dimensions : o 0,83 mm (0.033 ) 5,08 (0.20") 5,08 (0.20") 5,08 (0.20") 10,16 (0.40") 10,16 (0.40") 10,16 (0.40") 12,70 (0.50") +/-0,8 50,80 (2.00") 45,72 (1.80") 50,80 (2.00") 12,50 (0.50") 4 (0.15") +/-1 2,54 (0.10")
information given in this datasheet is believed to be accurate and reliable. however, no responsibility is assumed for the cons equence of its use nor for any infringement of patents or other rights of third parties which may result from its use. these products are sold only according to gaia converter general conditions of sale, unless otherwise confirmed by writing. spe cifications subject to change without notice. printed in france by gaia converter fc97-008.08/04 revision i graphisme : philippe clicq represented by : for more detailed specifications and applications information, contact : international headquarters marketing and sales department ga a converter - france address : b.p. 26 - 33186 le haillan - france tel. : + (33)-5-57-92-12-80 fax : + (33)-5-57-92-12-89 north american headquarters ga a converter canada, inc address : 6611 thimens st-laurent, quebec - canada h4s 1w2 tel. : (514)-333-3169 fax : (514)-333-4519

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