Hi-Rel DC/DC CONVERTER MGDM-35 : 35W POWER. 4:1 Wide Input Single, Bi & Triple Outputs Metallic Case VDC Isolation.

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1 DC/DC CONVERTER MGDM-3 : 3W POWER :1 Wide Input Single, Bi & Triple Outputs Metallic Case Isolation 2Vdc input compliant with MIL-STD-0/D/E/F power up to 3 W Wide temperature range : -0 C/+10 C case High efficiency (typ %) Soft start Galvanic isolation 100 Integrated LC input filter 1-General Permanent short circuit protection External synchronisation External trim and sense adjustment : +/-% No optocoupler for high reliability RoHS or Leaded process option The MGDM-3 wide input series is a full family of DC/DC power modules designed for aerospace, military and high-end industrial applications These modules use a high frequency fixed swiching technic at 20KHz providing excellent reliability, low noise characteristics and high power density Standard models are available with wide input voltage range of 9-36, and 16- The serie includes single, bi and triple output voltage choices of 33,, 12, volts No external heatsink is required for the MGDM-3 series to supply 3W output power over the full temperature range ll the modules are designed with LC network filters to minimize reflected input current ripple and output voltage ripple The modules include a soft-start, an input undervoltage lock-out, a permanent short circuit protection and an output overvoltage protection to ensure efficient module protections 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 GI Converter automated test equipment 2-Product Selection Single output model : MGDS input output / option Bi output model : MGDB input output / option Triple output model : MGDT input output / option suffix suffix suffix Input ltage Range Output Permanent H : 9-36 O : 16- Transient 0 /100 ms 0 /100 ms B : 33 C : or +/- E : 12 or +/-12 F : or +/- BE : 33 and +/- 12 BF : 33 and +/- CE : and +/- 12 CF : and +/- REDEFINING THE SOURCE OF POWER Gaia Converter FC0001/10 Revision C Options : Suffix : /T : option for - C start up operating temperature nothing : RoHS process /S : option for screening and serialization -L : leaded process (available in N merica)

2 2- Product Selection (continued) Input range Output Current Reference Options Suffix ,3 12 +/- +/- 12 +/- 3,3 & +/- 11, 3,3 & +/-,2,1 & +/- 11,,1 & +/- 1, 2,9 2,3 +/- * +/- 1, * +/- 1,3 * & +/- 1,1 * & +/- 0,9 * & +/- 1,1 * & +/- 0,9 * MGDS-3-H-B MGDS-3-H-C MGDS-3-H-E MGDS-3-H-F MGDB-3-H-C MGDB-3-H-E MGDB-3-H-F MGDT-3-H-BE MGDT-3-H-BF MGDT-3-H-CE MGDT-3-H-CF ,3 12 +/- +/- 12 +/- 3,3 & +/- 11, 3,3 & +/- 1,,1 & +/- 11,,1 & +/- 1, 2,9 2,3 +/- * +/- 1, * +/- 1,3 * & +/- 1,1 * & +/- 0,9 * & +/- 1,1 * & +/- 0,9 * MGDS-3-O-B MGDS-3-O-C MGDS-3-O-E MGDS-3-O-F MGDB-3-O-C MGDB-3-O-E MGDB-3-O-F MGDT-3-O-BE MGDT-3-O-BF MGDT-3-O-CE MGDT-3-O-CF * Note : Indicated values are maximum current on each output with total power not exceeding 3W Converter Selection Chart MGDS H - C / T - L Number of Outputs : S : single output B : bi ouput T : triple output Input voltage range : H : 9-36 O : 16- Output voltage : See table page 1 Option : /T : - C start up operation /S : screening & serialization (consult application note «screening grades») Suffix : nothing : RoHS process -L : Leaded process (available in N merica) Gaia Converter FC0-001/10 Revision C 2

3 3- Electrical Specifications Data are valid at +2 C, unless otherwise specified Parameter Input Conditions Limit or typical Note * : The ripple output voltage is the periodic C component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered This noise can be reduced by adding an external capacior (typically 10nF/rated voltage depending on isolation requirement) connected between the pin n and the pin ut of the converterthis capacitor should be layed-out as close as possible from the converter Note ** : For load regulation characteristics from 0% to full load, please contact factory Units Single Output MGDS H 3 - O input voltage 20 2 Permanent input voltage range (Ui) Transient input voltage Undervoltage lock-out (UVLO) Start up time Reflected ripple current Input current in short circuit mode (verage) No load input power Output Output voltage Set Point accuracy Output power Output current 3,3V output V output 12V output V output Ripple output voltage * 3,3V and V output 12V output V output Line regulation Load regulation ** Efficiency admissible Capacitive load 3,3V and V output 12V and V output Min - Max (Consult factory) Turn-on voltage Turn-off voltage within 3 ms output : resistive, full load at switching freq BW = 20MHz Short-circuit No load or Stanby % load mbient temperature : +2 c, % load BW = 20MHz % load 2% to full load Per output /S 0/0,1 0/0,1,, 1 ms mpp Typical m TBD TBD mw ,3 12 3,3 12 % +/- 2 +/- 2 W 3 3 2,9 2, ,9 2,3 100 % +/- 1 +/- 1 % +/- 2 +/- 2 Typical % 3 µf µf Gaia Converter FC0-001/10 Revision C 3

4 3- Electrical Specifications (continued) Data are valid at +2 C, unless otherwise specified Parameter Input Conditions Limit or typical Units Bi Output MGDB H 3 - O input voltage 20 2 Permanent input voltage range (Ui) Transient input voltage Undervoltage lock-out (UVLO) Start up time Reflected ripple current Input current in short circuit mode (verage) No load input power Output Output voltage Set Point accuracy Output power * Output current * +/- V output +/- 12V output +/- V output Ripple output voltage ** V output 12V output V output Line regulation Load regulation *** Cross load output regulation Efficiency admissible Capacitive load V output 12V and V output Min - Max (Consult factory) Turn-on voltage Turn-off voltage output : resistive, full load at switching freq BW = 20MHz Short-circuit No load or Stanby % load mbient temperature : +2 c, % load BW = 20MHz % load 2% to full load + ut at % load - ut from 2% to full load Per output /S 0/0,1 0/0,1,, 1 ms mpp Typical m TBD TBD mw /- +/- 12 +/- +/- +/- 12 +/- % +/- 2 +/- 2 W +/- 20 +/- 20 +/- +/- 1, +/- 1, /- +/- 1, +/- 1,3 100 % +/- 1 +/- 1 % +/- 2 +/- 2 % +/- 0, +/- 0, Typical % µf µf Note * : power per output with total power not exceeding 3W Note ** : The ripple output voltage is the periodic C component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered This noise can be reduced by adding an external capacitor (typically 10nF/rated voltage depending on isolation requirement) connected between the pin n and the pin ut of the converter This capacitor should be layed-out as close as possible from the converter Note *** : For load regulation characteristics from 0% to full load, please contact factory Gaia Converter FC0-001/10 Revision C

5 3- Electrical Specifications (continued) Data are valid at +2 C, unless otherwise specified Parameter Input Gaia Converter FC0-001/10 Revision C Conditions Limit or typical Units Tri Output MGDT H 3 - O input voltage 20 2 Permanent input voltage range (Ui) Min - Max Transient input voltage /- S Undervoltage lock-out Turn-on voltage (UVLO) Turn-off voltage Start up time Reflected ripple current Input current in short circuit mode (verage) No load input power Output Output voltage (1) Set Point accuracy Output power * Output current * 3,3V & +/- 12V output 3,3V & +/- V output V & +/- 12V output V & +/- V output Ripple output voltage ** 3,3V and V output 12V output V output Line regulation Load regulation *** Cross load output regulation Efficiency admissible Capacitive load 3,3V and V output 12V and V output output : resistive, full load at switching freq BW = 20MHz Short-circuit No load or Stanby % load mbient temperature : +2 c, % load BW = 20MHz % oad 2% to full load + ut at % load - ut from 2% to full load Per output 0/0,1 0/0,1,, 1 ms mpp Typical m TBD TBD mw ,3 & +/-11, 3,3 & +/-,2,1 & +/- 11,,1 & +/- 1, 3,3 & +/-11, 3,3 & +/-1,,1 & +/- 11,,1 & +/- 1, % +/- 2 +/- 2 W 20 & +/ & +/- 1 & +/- 1,1 & +/- 0,9 & +/- 1,1 & +/- 0,9 100 & +/- 1,1 & +/- 0,9 & +/- 1,1 & +/- 0,9 100 % +/- 1 +/- 1 % +/- 2 +/- 2 % +/- 0, +/- 0, Typical % Note (1) : The primary voltage should be minimum loaded (consult factory) to be able to get the secondary outputs Note * : power per output with total power not exceeding 3W Note ** : The ripple output voltage is the periodic C component imposed on the output voltage, an aperiodic and random component (noise) has also to be considered This noise can be reduced by adding an external capacitor (typically 10nF/rated voltage depending on isolation requirement) connected between the pin n and the pin ut of the converter This capacitor should be layed-out as close as possible from the converter Note *** : For load regulation characteristics from 0% to full load, please contact factory µf µf

6 3- Electrical Characteristics (continued) Figure 1 : Typical efficiency versus load at various input Figure 2 : Typical efficiency versus load at various input 90% 100% 0% 90% Efficiency (%) 0% 60% 0% 0% 30% 20% 10% input 36V input 20V input 9V Efficiency %) 0% 0% 60% 0% 0% 30% 20% 10% input 36V input 20V input 9V 0% 0% Output Power (W) (MGDS-3-H-C module) Output Power (W) (MGDS-3-H-E module) Figure 3 : Typical efficiency versus load at various input Figure : Typical load regulation characteristics at nominal input 100% 90%,0 Efficiency (%) Efficiency (%) 0% 0% 60% 0% 0% 30% 20% 10% input 36V input 20V input 9V Output ltage (),30,20,10,00,90,0,0 0%, ,00 1,00 2,00 3,00,00,00 6,00,00,00 Output Power (W) (MGDS-3-H-F module) Output Current (I) (MGDS-3-H-C module) Output ltage () 13,00 12,0 12,60 12,0 12,20 12,00 Figure : Typical load regulation characteristics at nominal input Output ltage () 16,00,0,60,0,20,00 1,0 1,60 Figure 6 : Typical load regulation characteristics at nominal input 11,0 1,0 0,00 0,0 1,00 1,0 2,00 2,0 3,00 3,0 0,00 0,0 1,00 1,0 2,00 2,0 Output Current (I) (MGDS-3-H-E module) Output Current (I) (MGDS-3-H-F module) Gaia Converter FC0-001/10 Revision C 6

7 - Switching Frequency Parameter Conditions Limit or typical Specifications Switching frequency No load to full load, fixed 20 KHz - Isolation Parameter Conditions Limit or typical Specifications Electric strength test voltage (basic version) Input to output Minimum 1 00 / 1 min Electric strength test voltage between outputs (for dual and triple outputs) Output to output Minimum No isolation Isolation resistance 00 Minimum 100 MOhm 6- Protection Functions Characteristics Protection Device Recovery Limit or typical Specifications Input undervoltage lock-out (UVLO) Output short circuit protection (SCP) Output overvoltage protection (OVP) Turn-on, turn-off circuit with hysteresis cycle Hiccup circuitry with auto-recovery Overvoltage protection device with clamping utomatic recovery utomatic recovery utomatic recovery Turn-on nominal Turn-off nominal See section 3 Permanent See section 11 Between 10% and 110% of output voltage - Reliability Data Characteristics Conditions Temperature Specifications Mean Time Between Failure (MTBF) ccording to MIL-HDBK-21F Ground fixed (Gf) irborne, Inhabited, Cargo (IC) Case at 0 C Case at C Case at 0 C Case at C Hrs Hrs Hrs Hrs Mean Time Between Failure (MTBF) ccording to IEC-6230-TR Civilian avionics, calculators mbient at C 100% time on Hrs Gaia Converter FC0-001/10 Revision C

8 - Electromagnetic Interference Electromagnetic Interference requirements according to MIL-STD-61C/D/E standards can be easily achieved as indicated in the following section The following table resumes the different sections covered by these standards Standard Requirements MIL-STD-61C Standard MIL-STD-61D/E Standard Compliance with GI 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 CS11 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 -1 Module Compliance with MIL-STD-61C/D/E Standards To meet the latest US military standards MIL-STD-61D/E (and also the MIL-STD-61C) requirements and in particular the conducted noise emission CE102 (and also CE03) requirements, Gaïa Converter can propose a stand-alone ready-to-use EMI filter module This EMI filter module has to be used together with a common mode noise capacitance C c (10nF/rated voltage depending on isolation requirement) connected between n and ut EMI Filter module reference : FGDS-2-0V Please consult EMI filter datasheet for further details VI Cc VI BP Cc EMI input Filter MGDM-series GI Cc GI BP Cc BP: Base Plate Gaia Converter FC0-001/10 Revision C

9 9- Thermal Characteristics Characteristics Conditions Limit or typical Performances Operating ambient temperature range Operating case temperature range at full load Storage temperature range Thermal resistance mbient temperature * Case temperature Non functionning Rth case to ambient in free air natural convection Note * : The upper temperature range depends on configuration, the user must assure a max case temperature of + 10 C Minimum Minimum Minimum - 0 C + C - 0 C + 10 C - C + 12 C Typical 6 C /W The MGDM-3 series operating case temperature must not exceed 10 C The maximum ambient temperature admissible for the DC/DC converter corresponding to the maximum operating case temperature of 10 C depends on the ambient airflow, the mounting/orientation, the cooling features and the power dissipated To calculate a maximum admissible ambient temperature the following method can be used Knowing the maximum case temparature Tcase = 10 C of the module, the power used Pout and the efficiency η : determine the power dissipated by the module Pdiss that should be evacuated : Pdiss = Pout(1/η - 1) determine the maximum ambient temperature : Ta = 10 C - Rth x Pdiss where Rth is the thermal resistance from the case to ambient The previous 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 10 C (white area in the following graph) Power (W) 100% % 0% 2% dditionnal cooling operation area Natural convection operation area Temperature ( C) ambient temperature without derating : 0 C case temperature : 10 C storage temperature : 12 C Gaia Converter FC0-001/10 Revision C 9

10 10- Environmental Qualifications The modules have been subjected to the following environmental qualifications Characteristics Conditions Severity Test procedure Climatic Qualifications Life at high temperature ltitude Humidity cyclic Humidity steady Salt atmosphere Temperature cycling Temperature shock Duration Temperature / status of unit ltitude level C Duration Climb up Stabilization Number of cycle Cycle duration Relative humidity variation Temperature variation Damp heat Temperature Duration Temperature Concentration NaCl Duration Number of cycles Temperature change Transfert time Steady state time Number of shocks Temperature change Transfert time Steady state time Test D : C case, unit 12 C ambient, unit not operating ft@- C 30 min ft/min to ft@- C, 30 min unit operating 10 Cycle I : 2 Hrs 60 % to % 31 C to 1 C unit not operating 93 % relative humidity 0 C 6 days unit not operating 3 C % Hrs unit not operating -0 C / + C 0 min 20 min unit operating C / +10 C 10 sec 20 min unit not operating MIL-STD-202G Method 10 MIL-STD-10E Method 003 MIL-STD-10E Method 03 MIL-STD-202G Method 103B MIL-STD-10E Method 093 MIL-STD-202 Method 102 MIL-STD-202G Method 10G Mechanical Qualifications bration (Sinusoidal) Shock (Half sinus) Bump (Half sinus) Number of cycles Frequency / amplitude Frequency / acceleration Duration Number of shocks Peak acceleration Duration Shock form Number of bumps Peak acceleration Duration 10 cycles in each axis 10 to 60 Hz / 0 mm 60 to Hz / 10 g 2h 30 min per axis unit not operating 3 shocks in each axis 100 g 6 ms 1/2 sinusoidal unit not operating bumps in each axis 0 g 6 ms unit not operating MIL-STD-10D Method 13 MIL-STD-10D Method 163 MIL-STD-10D Method 163 Gaia Converter FC0-001/10 Revision C 10

11 11- Description of Protections 11-1 Input Undervoltage Lock-out (UVLO) n input undervoltage protection will inhibit the module when input voltage drops below the lock-out turn-off threshold (see section 3 for value) and restores to normal operation automatically when the input voltage rises the lock-out turn-on threshold On Off The input undervoltage lock-out threshold (UVLO) can be trimmed by connecting a resistor between UVLO and pins This resistance can be calculated as folow : UVLO UVLO Turn-off Turn-on n R UVLO = K x 10 where n = UVLO trim (n - 1) UVLO threshold On/Off 1 6 Sync Input H Input O K 0,932 1,3 RULVO 1 2 Vref Trim UVLO 11-2 Output Short Circuit Protection (SCP) The short circuit protection device protects the module against short circuit of any duration and restores the module to normal operation when the short circuit is removed It operates in «hiccup» mode by testing periodically if an overload is applied (typically every 1s recovery time) The overload detection threshold is typically % of maximum current with a detection time lower than ms (%) 100 x detection time time recovery time recovery time 11-3 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 latch the converter off between 10% and 110% of output voltage Once in OVP protection, the module will restart automatically when overvoltage is removed Gaia Converter FC0-001/10 Revision C 11

12 12- Description of Functions 12-1 Trim Function The output voltage may be trimmed in a range of 9%/ 10% of the nominal output voltage via a single external trimpot or fixed resistorin case of dual or triple outputs, the trim function is also acting on the secondary outputs Trim Up Function Do not attempt to trim the module higher than 10% of nominal output voltage as the overvoltage protection may occur lso do not exceed the maximum rated output power when the module is trimmed up The trim up resistor must be connected to Vref pin The trim up resistance must be calculated with the following formula : V Otrimup 1 2 V O R U (k)=12 1 V Otrimup V O Ru On/Off Sync Vref Trim UVLO 1 Trim Down Function Do not trim down more than 9% of nominal output voltage The available output power is reduced by the same percentage that output voltage is trimmed down The trim down resistor must be connected to pin The trim down resistance must be calculated with the following formula : RD 6 On/Off Sync Vref Trim 1 R D (k)=12 V Otrimdown V O 2 (1 V Otrimdown V O ) 1 2 UVLO Trim via a voltage The output voltage is given by the following formula : = nom(006 V control + 0) On/Off Vref 1 Vcontrol Trim Sync UVLO 2 Gaia Converter FC0-001/10 Revision C 12

13 12- Description of Functions (continued) 12-2 On/Off Function The control pin (On/Off) can be used for applications requiring On/Off operation This may be done with an open collector transistor, a switch, a relay or an optocoupler Several converters may be disabled with a single switch by connecting all On/Off pins together The converter is disabled by pulling low the pin No connection or high impedance on pin enables the converter By releasing the On/Off function, the converter will restart within the start up time specifications given in table section 3 For further details please consult Logic On/Off application note Command On/Off GI Parameter Unit Min Typ Max Notes, conditions On/Off module enable voltage Vdc 3 / Open, the switch must not sink more than 100µ On/Off module disable voltage Vdc 0 / 1 The switch must be able to sink 1m On/Off module enable delay ms / / 30 / On/Off module disable delay µs / / 100 n nominal at full load 12-3 Synchronization Function n external clock with rectangular «Pull Up» signals can be used to lock one or more converters The external clock signal should have a frequency range from 0KHz to 600KHz, a low level below 0,V a high level of V (+/-0V), a rise time of 30 ns max and a drop time of 100ns max 6 On/Off Sync Vref Trim UVLO Synch bus 12- Reference function (Vref) The Vref signal output provides a stable V (±01 V) reference signal on Vref pin It is protected by an internal 10 kohms resistor This signal may be used also in conjunction with the Trim input pin (primary side) It is recommended to connect a filter capacitor (10nF) between Vref and, if Vref is used Gaia Converter FC0-001/10 Revision C 13

14 13- pplication Notes 13-1 Connection of Outputs in Series ny of the bi output converters can be configured to produce an output of 10V (+/- output models), 2V (+/-12V output models), or 30V (+/-V output models) by connecting the load across the output (+) and the output (-) with either output grounded, and leaving the common pin floating VI GI x 13-2 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, GI 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 voltages do not rise at the same time VI GI VI 2 x GI 13-3 Connection of Modules in Parallel Several converters with equal output voltage can be connected in parallel to increase power Nevertheless some cares have to be taken in particular as the output voltage of each converter is slightly different, when paralleling, the converter with the highest output voltage will source the most current However the GI Converter modules are designed with a soft output voltage versus current characteristic This causes the output voltage of each converter to automatically adjust downward as its current increases so each converter very approximately shares the total output current It is important that each converter has approximately the same impedance between their output and the common load VI GI VI GI Gaia Converter FC0-001/10 Revision C 1

15 1- PCB Mounting Specifications The MGDM-3 series has been design for low profile applications Two levels of mounting can be designed : On-board mounting with 12, mm height In-board mounting with 10, mm height and PCB hole design on the mother board Onboard Mounting Inboard Mounting Gaia Converter FC0-001/10 Revision C

16 - Dimensions Dimension are given in mm (inches) Tolerance : +/- 0,2 mm (+/- 001 ) unless otherwise indicated Weight : 0 grams (20 Ozs) max 6,90 (302") holes 3,3,0 (191") 3,6 (1") , +/-0, (03") 3 (012") 20 (09") 23,3 (092") R2 2,0 (32") 23,3 (092") ,90 (169") 3,93 +/-0, (0") x,0 ( x 020") 1,20 (01") 12,0 (00") 10, (01") 3,20 (013") 63,0 (20") Pin dimensions : 0,91 mm (0036") 16- Materials Recommended screw for mounting : M2 Case : Metallic black anodized coating Pins : Plated with pure matte tin over nickel underplate 1- Product Marking Upper face : Company logo, location of manufacturing Side face : Module reference : MGDx-3-»X»-»Y» Date code : year and week of manufacturing, suffix, /option 1- Connections Bottom view Pin Single Bi Triple 1 UVLO UVLO UVLO 2 - Input () - Input () - Input () 3 Do not connect Do not connect Do not connect + Input () + Input () + Input () Trim Trim Trim 6 Synchro (Sync) Synchro (Sync) Synchro (Sync) Vref Vref Vref On / Off On / Off On / Off 11 Do not connect Output - (-) Output 2- (-V2) 13 Do not connect Do not connect Output 2+ (+V2) Common () Common () Common () 1 Output () Output + (+) Output 1 (V1) Gaia Converter FC0-001/10 Revision C 16

17 For more detailed specifications and applications information, contact : International Headquarters GÏ Converter - France ZI de la Morandière 33 LE HILLN - FRNCE Tel : + (33) Fax : + (33) Represented by : North merican Headquarters GÏ Converter Canada, Inc 03 Le Corbusier Blvd LVL, QUEBEC - CND HL R2 Tel : (1) Fax : (1) Information given in this datasheet is believed to be accurate and reliable However, no responsibility is assumed for the consequence 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 GI Converter general conditions of sale, unless otherwise confirmed by writing Specifications subject to change without notice Printed in France by GI Converter Gaia Converter FC0-0301/10 Revision C Graphisme : Philippe Clicq