Redefining the sources of power

MGDM-250

Hi-Rel Grade, DC/DC Converter, 250 W

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General Characteristics

  • Dedicated to DO-160, MIL-704
  • External synchronization range : synchro on option
  • Galvanic isolation input/output : 1500 Vdc 
  • Nominal power up to : 250 W
  • Protections : input undervoltage lockout, output current limitation, output overvoltage, over temperature
  • Switching frequency : 330 KHz
  • Trim adjustment : 80 to 110 %
  • RoHs

Key Features

  • No load to full load operation
  • No optocoupler for high reliability
  • Single output
  • Soft start
  • Standard quarter brick package
  • Ultra wide input range 9-45 Vdc

Series Description
The MGDM-250 Military Grade DC-DC Converter series features a range of 250 W quarter brick modules with wide input voltage ranging from 9 to 36 Volts dc. The series switches at fixed frequency, and uses magnetic feed-back technology instead of classical opto-coupler for an improved reliability. The converter does not embed complex logic circuitry. Based on forward topology, the MGDM-250 has outstanding power efficiency performance. The converter features multiple functions.The output voltage trim allows users to slightly change the output voltage value with only one low power resistor. The switching frequency can be slightly shifted to avoid radar bandwidth or simply synchronized to another converter to reduce switching noise. The series is equipped with useful protections like soft-start for inrush current limitation, overload and short circuit protection, and over temperature shut-down. The MGDM-250 is especially suitable for demanding applications. It comes in a fully potted metallic quarter brick case that can operate with temperature ranging from -40 to 105°C.
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Product Selection

This product selection table includes all available versions. Other references may be offered – see technical datasheets.
For more information, please consult factory.

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Characteristics
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Reference Status Output power Input voltage Max. transient input voltage Switching frequency Output voltage Output current Min. transient input voltage Output Nbr Max power per channel Case dimensions Standard electrical functions Operating case temp. range Case material Max power in drop out operation UVLO range Output voltage trim Isolation voltage Synchronization freq. range Efficiency Weight Synchronization Options RoHS / SnPb
MGDS-250-H-C Active 250 W 9 - 36 Vdc 40.0 Vdc / 100 ms 330 KHz 5 Vdc 50 A 8.5 Vdc / 1 s S 61 x 39 x 12.9 mm UVLO, OCP, OVP, OTP, SYNC
TRIM, SENSE		 -40 to 105 °C 80 to 110 % 1500 Vdc 390 to 420 KHz 91 % 85 Grams IN T, S, F
MGDS-250-H-E Active 250 W 9 - 36 Vdc 40.0 Vdc / 100 ms 330 KHz 12 Vdc 20.8 A 8.5 Vdc / 1 s S 61 x 39 x 12.9 mm UVLO, OCP, OVP, OTP, SYNC
TRIM, SENSE		 -40 to 105 °C 80 to 110 % 1500 Vdc 390 to 420 KHz 91 % 85 Grams IN T, S, F
MGDS-250-H-F Active 250 W 9 - 36 Vdc 40.0 Vdc / 100 ms 330 KHz 15 Vdc 16.7 A 8.5 Vdc / 1 s S 61 x 39 x 12.9 mm UVLO, OCP, OVP, OTP, SYNC
TRIM, SENSE		 -40 to 105 °C 80 to 110 % 1500 Vdc 390 to 420 KHz 91 % 85 Grams IN T, S, F
MGDS-250-H-I Active 250 W 9 - 36 Vdc 40.0 Vdc / 100 ms 330 KHz 24 Vdc 10.4 A 8.5 Vdc / 1 s S 61 x 39 x 12.9 mm UVLO, OCP, OVP, OTP, SYNC
TRIM, SENSE		 -40 to 105 °C 80 to 110 % 1500 Vdc 390 to 420 KHz 91 % 85 Grams IN T, S, F

Output Nbr: S: Single output, B: Bi-outputs, D: Dual outputs, T: Triple outputs – Dual outputs products can be usable for single output or bi-outputs. Output Nbr E corresponds to a slave module (see DataSheet)
Case dimensions: L x W x H (maximum values in mm)
Standard electrical functions: Case: Case connection, OVLO: Input overvoltage lockout, UVLO: Input under voltage lockout, OCP: Output over current protection level, OPP: Output over power protection, OVP: Output over voltage protection level, SCP: Output short circuit protection, OTP: Over temperature protection, VIF: Pin for Input Current Ripple Reduction, SYNC: Pin for Synchronisation, TRIM: Pin for adjust ouput voltage, ITRIM: Pin for adjustement ouput current limitation, CC: Pin for capacitor charged signal, CD: Pin for capacitor discharged signal, UVLOadj: Pin for level undervoltage lockout adjust, VREF: Pin for output internal voltage reference, PF: Pin for power fail signal, SENSE: Pin for voltage regulation, REV.POL: Reverse polarity protection
Status NPR: Not preferred for new Design
Options: T Screening at start-up -55° C, Y High isolation 3000 Vdc, M On/Off function, S Screening and serialization, F Synchronization function

Technical Documentation
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Materials Disclosure Disclaimer
Even though all possible efforts have been made to provide you with the most accurate information, we can not guarantee to its completeness and accuracy due to the fact that the data has been compiled based on the ranges provided and some information that may not have been provided by the subcontractors and raw material suppliers to protect their business proprietary information.