Hi-Rel DC/DC CONVERTER MGDM-35 : 35W POWER Hi-RelHi-Rel GradeGrade 4:1 Wide Input Single, Bi & Triple Outputs Metallic Case - 1.500 VDC Isolation * 28Vdc input compliant with MIL-STD-740A/D/E/F * Nominal power up to 35 W * Wide temperature range : -40C/+105C case * High efficiency (typ. 84%) * Soft start * Galvanic isolation 1.500 VDC * Integrated LC input filter * Permanent short circuit protection * External synchronisation * External trim and sense adjustment : +/-5% * No optocoupler for high reliability * RoHS or Leaded process option 1-General The MGDM-35 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 250KHz providing excellent reliability, low noise characteristics and high power density. Standard models are available with wide input voltage range of 9-36, and 16-75. The serie includes single, bi and triple output voltage choices of 3.3, 5, 12, 15 volts. No external heatsink is required for the MGDM-35 series to supply 35W 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, 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 GAIA Converter automated test equipment. 2-Product Selection Single output model Bi output model Triple output model : MGDS - 35 : MGDB - 35 : MGDT - 35 - input output input output input output / / / option suffix option suffix option suffix Input Voltage Range Permanent H : O : 9-36 VDC 16-75 VDC Transient 40 VDC/100 ms 80 VDC/100 ms Options : /T : option for -55C start up operating temperature /S : option for screening and serialization Output B : C : E : F : BE : BF : CE : CF : 3.3 VDC 5 VDC or +/-5VDC 12 VDC or +/-12VDC 15 VDC or +/-15VDC 3.3 VDC and +/- 12 VDC 3.3 VDC and +/-15 VDC 5 VDC and +/- 12 VDC 5 VDC and +/-15 VDC Suffix : nothing : RoHS process -L : leaded process (available in N. America) REDEFINING THE SOURCE OF POWER (c) Gaia Converter FC045047.01/10 Revision C For locations, phone, fax, E-Mail see back cover 4 Hi-Rel Grade MGDM-35 Series 2- Product Selection (continued) Output Input range 9-36 9-36 9-36 9-36 9-36 9-36 9-36 9-36 9-36 9-36 9-36 VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC 16-75 16-75 16-75 16-75 16-75 16-75 16-75 16-75 16-75 16-75 16-75 VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC VDC Options Suffix Current Reference 3,3 3,3 5,1 5,1 3,3 VDC 5 VDC 12 VDC 15 VDC +/- 5 VDC +/- 12 VDC +/- 15 VDC & +/- 11,8 VDC & +/- 15,2 VDC & +/- 11,8 VDC & +/- 14,7 VDC 7A 7A 2,9 A 2,3 A +/- 4 A* +/- 1,7 A* +/- 1,3 A* 4 A & +/- 1,1 A* 4 A & +/- 0,9 A* 4 A & +/- 1,1 A* 4 A & +/- 0,9 A* MGDS-35-H-B MGDS-35-H-C MGDS-35-H-E MGDS-35-H-F MGDB-35-H-C MGDB-35-H-E MGDB-35-H-F MGDT-35-H-BE MGDT-35-H-BF MGDT-35-H-CE MGDT-35-H-CF /T /T /T /T /T /T /T /T /T /T , , , , , , , , , , /S /S /S /S /S /S /S /S /S /S -, -, -, -, -, -, -, -, -, -, -L -L -L -L -L -L -L -L -L -L 3,3 3,3 5,1 5,1 3,3 VDC 5 VDC 12 VDC 15 VDC +/- 5 VDC +/- 12 VDC +/- 15 VDC & +/- 11,7 VDC & +/- 14,7 VDC & +/- 11,7 VDC & +/- 14,7 VDC 7A 7A 2,9 A 2,3 A +/- 4 A* +/- 1,7 A* +/- 1,3 A* 4 A & +/- 1,1 A* 4 A & +/- 0,9 A* 4 A & +/- 1,1 A* 4 A & +/- 0,9 A* MGDS-35-O-B MGDS-35-O-C MGDS-35-O-E MGDS-35-O-F MGDB-35-O-C MGDB-35-O-E MGDB-35-O-F MGDT-35-O-BE MGDT-35-O-BF MGDT-35-O-CE MGDT-35-O-CF /T /T /T /T /T /T /T /T /T /T , , , , , , , , , , /S /S /S /S /S /S /S /S /S /S -, -, -, -, -, -, -, -, -, -, -L -L -L -L -L -L -L -L -L -L 4 * Note : Indicated values are maximum current on each output with total power not exceeding 35W. Converter Selection Chart MGDS - 35 - H - C / T - L Number of Outputs : S : single output B : bi ouput T : triple output Input voltage range : 4 H : 9-36 VDC O : 16-75 VDC Output voltage : See table page 1 Option : /T : -55C start up operation /S : screening & serialization (consult application note screening grades) Suffix : nothing : RoHS process -L : Leaded process (available in N. America) (c) Gaia Converter 2 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 3- Electrical Specifications Data are valid at +25C, unless otherwise specified. Parameter Input Nominal input voltage Permanent input voltage range (Ui) Transient input voltage Undervoltage lock-out (UVLO) Start up time Reflected ripple current Input current in short circuit mode (Average) No load input power Conditions Limit or typical Units Full temperature range Nominal Full temperature range Single Output MGDS-35 35 - H 35 - O VDC 20 28 Min. - Max. VDC 9-36 16-75 Maximum VDC/S 40/0,1 80/0,1 Nominal Nominal VDC VDC 8,8 8 15,8 14 Maximum ms 30 30 Maximum mApp 600 600 Typical mA TBD TBD Maximum mW 300 500 Nominal Nominal Nominal Nominal VDC VDC VDC VDC 3,3 5 12 15 3,3 5 12 15 Maximum % +/- 2 +/- 2 Maximum W 35 35 Full temperature range Ui min. to max. Maximum Maximum Maximum Maximum A A A A 7 7 2,9 2,3 7 7 2,9 2,3 Ui nominal Full load BW = 20MHz Maximum Maximum Maximum mVpp mVpp mVpp 100 200 200 100 200 200 Maximum % +/- 1 +/- 1 Maximum % +/- 2 +/- 2 Typical % 83 84 Maximum Maximum F F 10.000 1.000 10.000 1.000 Full load (Consult factory) Turn-on voltage Turn-off voltage Ui nominal within 3 ms Nominal output Full load : resistive Ui nominal, full load at switching freq. BW = 20MHz Ui nominal Short-circuit Ui min. to max. No load or Stanby Output Output voltage Set Point accuracy Output power Output current 3,3V output 5V output 12V output 15V output Ripple output voltage * 3,3V and 5V output 12V output 15V output 4 Line regulation Load regulation ** Efficiency Maximum admissible Capacitive load 3,3V and 5V output 12V and 15V output Full temperature range Ui min. to max. 75% load Ambient temperature : +25c Ui nominal, 75% load Full temperature range Ui min. to max. Ui min. to max. 75% load Ui nominal 25% to full load Ui nominal Full load Ui nominal Full load Per output 4 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 an external capacior (typically 10nF/rated voltage depending on isolation requirement) connected between the pin Gin and the pin Gout 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. (c) Gaia Converter 3 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 3- Electrical Specifications (continued) Data are valid at +25C, unless otherwise specified. Parameter Input Nominal input voltage Permanent input voltage range (Ui) Transient input voltage Undervoltage lock-out (UVLO) Start up time Reflected ripple current Input current in short circuit mode (Average) No load input power Conditions Limit or typical Units Full temperature range Nominal Full temperature range Bi Output MGDB-35 35 - H 35 - O VDC 20 28 Min. - Max. VDC 9-36 16-75 Maximum VDC/S 40/0,1 80/0,1 Nominal Nominal VDC VDC 8,8 8 15,8 14 Maximum ms 30 30 Maximum mApp 600 600 Typical mA TBD TBD Maximum mW 300 500 Nominal Nominal Nominal VDC VDC VDC +/- 5 +/- 12 +/- 15 +/- 5 +/- 12 +/- 15 Maximum % +/- 2 +/- 2 Maximum W +/- 20 +/- 20 Full temperature range Ui min. to max. Maximum Maximum Maximum A A A +/- 4 +/- 1,7 +/- 1,3 +/- 4 +/- 1,7 +/- 1,3 Ui nominal Full load BW = 20MHz Maximum Maximum Maximum mVpp mVpp mVpp 100 200 200 100 200 200 Maximum % +/- 1 +/- 1 Maximum % +/- 2 +/- 2 Maximum % +/- 0,5 +/- 0,5 Typical % 84 85 Maximum Maximum F F 1.000 1.000 1.000 1.000 Full load (Consult factory) Turn-on voltage Turn-off voltage Ui nominal Nominal output Full load : resistive Ui nominal, full load at switching freq. BW = 20MHz Ui nominal Short-circuit Ui min. to max. No load or Stanby Output Output voltage Set Point accuracy Output power * Output current * +/- 5V output +/- 12V output +/- 15V output Ripple output voltage ** 5V output 12V output 15V output Line regulation 4 Load regulation *** Cross load output regulation Efficiency Maximum admissible Capacitive load 5V output 12V and 15V output Full temperature range Ui min. to max. 75% load Ambient temperature : +25c Ui nominal, 75% load Full temperature range Ui min. to max. Ui min. to max. 75% load Ui nominal 25% to full load Ui nominal + Vout at 75% load - Vout from 25% to full load Ui nominal Full load Ui nominal Full load Per output 4 Note * : Maximum power per output with total power not exceeding 35W. 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 an external capacitor (typically 10nF/rated voltage depending on isolation requirement) connected between the pin Gin and the pin Gout 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. (c) Gaia Converter 4 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 3- Electrical Specifications (continued) Data are valid at +25C, unless otherwise specified. Parameter Input Nominal input voltage Permanent input voltage range (Ui) Conditions Limit or typical Units Full temperature range Nominal VDC Full temperature range Min. - Max. VDC Tri Output MGDT-35 35 - H 35 - O 20 28 9-36 16-75 40/0,1 80/0,1 8,8 8 15,8 14 Transient input voltage Full load Maximum Undervoltage lock-out (UVLO) Turn-on voltage Turn-off voltage Ui nominal Nominal output Full load : resistive Ui nominal, full load at switching freq. BW = 20MHz Ui nominal Short-circuit Ui min. to max. No load or Stanby Nominal Nominal VDC/S VDC VDC Maximum ms 30 30 Maximum mApp 600 600 Typical mA TBD TBD Maximum mW 300 500 Nominal Nominal Nominal Nominal VDC VDC VDC VDC 3,3 & +/-11,8 3,3 & +/-15,2 5,1 & +/- 11,8 5,1 & +/- 14,7 3,3 & +/-11,7 3,3 & +/-14,7 5,1 & +/- 11,7 5,1 & +/- 14,7 % +/- 2 +/- 2 W 20 & +/- 14 20 & +/- 14 4 & +/- 1,1 4 & +/- 0,9 4 & +/- 1,1 4 & +/- 0,9 4 & +/- 1,1 4 & +/- 0,9 4 & +/- 1,1 4 & +/- 0,9 Start up time Reflected ripple current Input current in short circuit mode (Average) No load input power Output Output voltage (1) Set Point accuracy Output power * Output current * 3,3V & +/- 12V output 3,3V & +/- 15V output 5V & +/- 12V output 5V & +/- 15V output Ripple output voltage ** 3,3V and 5V output 12V output 15V output 4 Line regulation Load regulation *** Cross load output regulation Efficiency Maximum admissible Capacitive load 3,3V and 5V output 12V and 15V output Full temperature range Ui min. to max. 75% load Ambient temperature : +25c Maximum Ui nominal, 75% load Full temperature range Maximum Ui min. to max. Full temperature range Ui min. to max. Maximum Maximum Maximum Maximum A A A A Ui nominal Full load BW = 20MHz Maximum Maximum Maximum mVpp mVpp mVpp 100 200 200 100 200 200 % +/- 1 +/- 1 % +/- 2 +/- 2 % +/- 0,5 +/- 0,5 % 84 85 F F 4.700 470 4.700 470 Ui min. to max. Maximum 75% oad Ui nominal Maximum 25% to full load Ui nominal + Vout at 75% load Maximum - Vout from 25% to full load Ui nominal Typical Full load Ui nominal Full load Per output Maximum Maximum 4 Note (1) : The primary voltage should be minimum loaded (consult factory) to be able to get the secondary outputs. Note * : Maximum power per output with total power not exceeding 35W. 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 an external capacitor (typically 10nF/rated voltage depending on isolation requirement) connected between the pin Gin and the pin Gout 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. (c) Gaia Converter 5 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 3- Electrical Characteristics (continued) Figure 2 : Typical efficiency versus load at various input 90% 100% 80% 90% 70% 80% 60% 70% Efficiency %) Efficiency (%) Figure 1 : Typical efficiency versus load at various input input 36V input 20V 50% 40% input 9V 30% 60% input 36V 50% input 20V 40% input 9V 30% 20% 20% 10% 10% 0% 0% 0 5 10 15 Output Power (W) 20 25 0 5 10 15 20 25 Output Power (W) (MGDS-35-H-C module) 30 35 40 (MGDS-35-H-E module) Figure 4 : Typical load regulation characteristics at nominal input Figure 3 : Typical efficiency versus load at various input 5,40 80% 5,30 Output Voltage (VDC) 90% Efficiency (%) Efficiency (%) 100% 70% 60% input 36V 50% 40% input 20V 30% input 9V 20% 5,20 5,10 4,90 4,80 4,70 10% 4,60 0% 0 5 10 15 20 25 Output Power (W) 30 35 0,00 40 3,00 4,00 5,00 6,00 7,00 8,00 (MGDS-35-H-C module) 16,00 15,80 Output Voltage (VDC) 12,80 Output Voltage (VDC) 2,00 Figure 6 : Typical load regulation characteristics at nominal input 13,00 12,60 12,40 12,20 12,00 15,60 15,40 15,20 15,00 14,80 14,60 11,80 14,40 0,00 0,50 1,00 Output Current (I) (c) Gaia Converter 1,00 Output Current (I) (MGDS-35-H-F module) Figure 5 : Typical load regulation characteristics at nominal input 4 4 5,00 1,50 2,00 2,50 3,00 3,50 (MGDS-35-H-E module) 0,00 0,50 Output Current (I) 1,00 1,50 2,00 2,50 (MGDS-35-H-F module) 6 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 4- Switching Frequency Parameter Conditions Limit or typical Specifications Switching frequency Full temperature range Ui min. to max. No load to full load Nominal, fixed 250 KHz Parameter Conditions Limit or typical Specifications Electric strength test voltage (basic version) Input to output Minimum 1.500 VDC / 1 min Electric strength test voltage between outputs (for dual and triple outputs) Output to output Minimum No isolation Isolation resistance 500 VDC Minimum 100 MOhm 5- Isolation 6- Protection Functions 4 Characteristics Protection Device Recovery Limit or typical Specifications Input undervoltage lock-out (UVLO) Turn-on, turn-off circuit with hysteresis cycle Automatic recovery Turn-on nominal Turn-off nominal See section 3 Output short circuit protection (SCP) Hiccup circuitry with auto-recovery Automatic recovery Permanent See section 11 Output overvoltage protection (OVP) Overvoltage protection device with clamping Automatic recovery Nominal Between 105% and 110% of output voltage 4 7- Reliability Data Characteristics Mean Time Between Failure (MTBF) According to MIL-HDBK-217F Mean Time Between Failure (MTBF) According to IEC-62380-TR (c) Gaia Converter Conditions Temperature Specifications Ground fixed (Gf) Case at 40C Case at 85C 700.000 Hrs 360.000 Hrs Airborne, Inhabited, Cargo (AIC) Case at 40C Case at 85C 390.000 Hrs 150.000 Hrs Avionics Military Cargo / Consult factory 7 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 8- Electromagnetic Interference Electromagnetic 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. Compliance with GAIA Converter Module & common mode capacitance MIL-STD-461C Standard MIL-STD-461D/E Standard 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 Standard Requirements 4 8-1 Module Compliance with MIL-STD-461C/D/E Standards To meet the latest US military standards MIL-STD-461D/E (and also the MIL-STD-461C) requirements and in particular the conducted noise emission CE102 (and also CE03) requirements, Gaia 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 Gin and Gout. EMI Filter module reference : FGDS-2A-50V. Please consult EMI filter datasheet for further details. Cc 4 VI Vo VI EMI input Filter GI Cc BP BP Vo MGDM-series Go Go GI BP BP Cc Cc BP: Base Plate (c) Gaia Converter 8 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 9- Thermal Characteristics Conditions Limit or typical Performances Operating ambient temperature range Characteristics Ambient temperature * Minimum Maximum - 40C + 85C Operating case temperature range at full load Case temperature Minimum Maximum - 40C + 105C Storage temperature range Non functionning Minimum Maximum - 55C + 125C Thermal resistance Rth case to ambient in free air natural convection Typical 6C /W Note * : The upper temperature range depends on configuration, the user must assure a max. case temperature of + 105C. The MGDM-35 series operating case temperature must not exceed 105C. The maximum ambient temperature admissible for the DC/DC converter corresponding to the maximum operating case temperature of 105C 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 = 105C of the module, the power used Pout and the efficiency : * determine the power dissipated by the module Pdiss that should be evacuated : - 1) Pdiss = Pout(1/ * determine the maximum ambient temperature : Ta = 105C - Rth x Pdiss where Rth is the thermal resistance from the case to ambient. 4 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 105C (white area in the following graph). Power (W) 100% Additionnal cooling operation area 4 75% 50% Natural convection operation area 25% 10 20 30 40 50 60 70 80 90 100 Temperature (C) Full load ambient temperature without derating : 70C Maximum case temperature : 105C Maximum storage temperature : 125C (c) Gaia Converter 9 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 10- Environmental Qualifications The modules have been subjected to the following environmental qualifications. Characteristics Conditions Severity Test procedure 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 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 Climatic Qualifications Life at high temperature 4 Mechanical Qualifications 4 (c) Gaia Converter 10 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 11- Description of Protections 11-1 Input Undervoltage Lock-out (UVLO) On An 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. Off The input undervoltage lock-out threshold (UVLO) can be trimmed by connecting a resistor between UVLO and Gi pins. This resistance can be calculated as folow : RUVLO = K x 104 (n - 1) K where n = UVLO trim UVLOthreshold Inp u t H In pu t O 0,932 1,34 Vin UVLO UVLO Turn-off Turn-on 4 Vi On/Off 6 Sync 7 5 RULVO Gi Vi 8 Vo 17 Go 15 Vref Trim 1 UVLO 2 Gi 4 11-2 Output Short Circuit Protection (SCP) Vo (%) 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 200% of maximum current with a detection time lower than 5ms. 100 detection time x time recovery time recovery time 4 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 105% and 110% of output voltage. Once in OVP protection, the module will restart automatically when overvoltage is removed. (c) Gaia Converter 11 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 12- Description of Functions 12-1 Trim Function The output voltage Vo may be trimmed in a range of 95%/ 105% of the nominal output voltage via a single external trimpot or fixed resistor.In case of dual or triple outputs, the trim function is also acting on the secondary outputs. Trim Up Function 4 Vi Do not attempt to trim the module higher than 105% of nominal output voltage as the overvoltage protection may occur. Also 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 : On/Off 6 Sync 7 Ru Vi 8 5 Vo 17 Vref Trim 1 UVLO Gi 2 Gi Go 15 Vi 4 Vi Vo 17 Go 15 Trim Down Function Do not trim down more than 95% 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 Gi pin. The trim down resistance must be calculated with the following formula : On/Off 6 Sync 7 RD Gi 4 8 5 4 Vref Trim 1 UVLO 2 Gi Trim via a voltage The output voltage is given by the following formula : 4 Vi 8 Vo = Vo nom(0.0565 V control + 0.887) 7 + Vcontrol Gi (c) Gaia Converter 5 6 1 2 Vi Vo 17 Go 15 On/Off Vref Trim Sync UVLO Gi 12 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover Hi-Rel Grade MGDM-35 Series 12- Description of Functions (continued) 12-2 On/Off Function The control pin 8 (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 8. * No connection or high impedance on pin 8 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. On/Off Command GI Parameter Unit Min. Typ. Max. Notes, conditions On/Off module enable voltage Vdc 3 / 4 On/Off module disable voltage Vdc 0 / 1.5 On/Off module enable delay ms / / 30 / On/Off module disable delay s / / 100 Vin nominal at full load Open, the switch must not sink more than 100A The switch must be able to sink 1mA 4 12-3 Synchronization Function An 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 550KHz to 600KHz, 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. Vi 4 Vi 8 On/Off 6 Sync 7 5 4 Gi Vo 17 Go 15 Vref Trim 1 UVLO 2 Gi Synch bus 12-4 Reference function (Vref) The Vref signal output provides a stable 4V (0.1 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 5 (primary side). It is recommended to connect a filter capacitor (10nF) between Vref and Gi, if Vref is used. (c) Gaia Converter 13 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 13- Application Notes 13-1 Connection of Outputs in Series 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. VI +Vo Go GI -Vo VI Vo GI Go VI Vo 2 x Vo 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, 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 voltages do not rise at the same time. 2 x Vo 4 GI Go VI Vo 13-3 Connection of Modules in Parallel 4 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 GAIA 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. (c) Gaia Converter Vo GI Go VI Vo GI Go 14 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 14- PCB Mounting Specifications The MGDM-35 series has been design for low profile applications. Two levels of mounting can be designed : * On-board mounting with 12,5 mm height * In-board mounting with 10,5 mm height and PCB hole design on the mother board Onboard Mounting Inboard Mounting 4 4 (c) Gaia Converter 15 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover MGDM-35 Series Hi-Rel Grade 15- Dimensions 13 3 4 5 6 7 8 10,5 15 20 (0.79") 17 23,35 (0.92") 42,90 (1.69") (0.15") 23,35 (0.92") 82,50 (3.25") (0.41") 12,50 (0.50") 18,20 (0.71") 9,5 +/-0,4 (0.37") 3 (0.12") 8 x 5,08 1 2 48,50 35,56 (1.91") (1.4") . . . . . . . . . 11 R2 (8 x 0.20") 3,93 +/-0,4 Dimension are given in mm (inches). Tolerance : +/- 0,2 mm (+/- 0.01 ") unless otherwise indicated. Weight : 80 grams (2.80 Ozs) max. 76,90 (3.02") 4 holes 3,3 3,20 (0.13") 63,50 (2.50") Pin dimensions : 4 0,91 mm (0.036") 16- Materials Case : Metallic black anodized coating. Pins : Plated with pure matte tin over nickel underplate. 17- Product Marking Upper face : Company logo, location of manufacturing. Side face : Module reference : MGDx-35-X-Y. Date code : year and week of manufacturing, suffix, /option. 4 18- Connections Pin Single Bi 1 UVLO UVLO UVLO 2 - Input (Gi) - Input (Gi) - Input (Gi) 3 Do not connect Do not connect Do not connect 4 + Input (Vi) + Input (Vi) + Input (Vi) 5 Trim Trim Trim 15 6 Synchro (Sync) Synchro (Sync) Synchro (Sync) 7 Vref Vref Vref 17 8 On / Off On / Off On / Off 11 Do not connect Output - (-Vo) Output 2- (-V2) 13 Do not connect Do not connect Output 2+ (+V2) 15 Common (Go) Common (Go) Common (Go) 17 Output (Vo) Output + (+Vo) Output 1 (V1) 11 1 2 13 3 4 5 6 7 8 Bottom view (c) Gaia Converter Triple 16 FC05-047.01/10 Revision C For locations, phone, fax, E-Mail see back cover International Headquarters GAIA Converter - France ZI de la Morandiere 33185 LE HAILLAN - FRANCE Tel. : + (33)-5-57-92-12-80 Fax : + (33)-5-57-92-12-89 North American Headquarters GAIA Converter Canada, Inc 4038 Le Corbusier Blvd LAVAL, QUEBEC - CANADA H7L 5R2 Tel. : (514)-333-3169 Fax : (514)-333-4519 Represented by : 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 GAIA Converter general conditions of sale, unless otherwise confirmed by writing. Specifications subject to change without notice. Printed in France by GAIA Converter Gaia Converter FC04-035.01/10 Revision C. Graphisme : Philippe Clicq For more detailed specifications and applications information, contact :