Hi-Rel Grade, DC/DC Transient Protection Module, 300 W

General Characteristics

  • Additional functions : adjustable inrush current drive
  • Galvanic isolation input/output : non isolated
  • Power range : from 4 W to 300 W
  • Protections : output over current, over temperature
  • Transient suppressor : 60, 80, 100 Vdc
  • RoHs

Key Features

  • DO-160 C/D/E/F cat A, B and Z
  • MIL-STD-1275 A/B/C/D
  • MIL-STD-704 A/D/E/F, EN2282, AIR2021E
  • Transient suppressor for Avionics/Defense

Series Description
The GAIA Converter limitor LGDS-300 is an ultra compact power adaptator module designed to allow operation during voltage transients and spikes, occuring in avionics or military systems. The LGDS-300 delivers an output voltage adapted to GAIA Converter DC/DC modules. 
This module is optimized to provide high power efficiency up to 99% over the whole power range up to 300W. 
The LGDS-300 features 3 modes of operations as follow: 
- Normal operation: Normal operation occurs in between the permanent input voltage of the DC/DC converter; The LGDS-300 is then operating in steady transparency state. 
- Power fail operation: The power fail operation occurs when the input bus drops below 9 Vdc low voltage limit; an undervoltage lock-out stops the LGDS-300. 
- Transient operation: The LGDS-300 clamps input transient up to 80V/100ms or 100V/50ms. 
The LGDS-300 series is compliant with the international input bus standards: 
- MIL-STD-704A/D/E/F 
- AECMA EN2282 
- GAM-EG13B/AIR2021E 
- DO160E cat A, B and Z 
- MIL-STD-1275A/B/C/D 
The design has been carried out with surface mount components and is manufactured in a fully automated process to guarranty high quality. Every module is tested with a GAIA Converter automated test equipment. The modules are potted with a bi-component thermal conductive compound and packaged in a metallic case to ensure the module’s integrity under severe environmental conditions.
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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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Reference Status Output power Input voltage Max. transient input voltage Switching frequency Output voltage Output current Min. transient input voltage Case dimensions Standard electrical functions Adj. hold-up capa final voltage EMI Filter Hold up mode threshold voltage Operating case temp. range Case material Inrush current limiter Max drop out in nomal mode Charger switching frequency Max power in drop out operation DC resistance UVLO min Synchronization freq. range Voltage drop @ I max Weight Synchronization Transient elevator Power dissipation Options RoHS / SnPb
LGDS-300-O-K Active 300 W 100.0 Vdc / 50 ms 9 - 42 Vdc 20 A 40.3 x 26.3 x 12.8 mm ICL, OCP, OTP TBD Vdc Basic -40 to 105 °C Metallic black anodized coating 5 A 35 Grams N N 3 W S

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, SHARE: Pin for output current parallel sharing
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, P Share 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.