Hi-Rel Grade, DC/DC Input Bus Conditioner, 600 W

General Characteristics

  • Additional functions : back-up source control, switching frequency synchronization generator
  • Galvanic isolation input/output : non isolated
  • Power range : from 4 W to 600 W
  • Protections : reverse polarity, over temperature
  • Transient suppressor : 60, 80, 100, 202 Vdc
  • RoHs

Key Features

  • ASP : Abnormal Surge Protection
  • DEF-STAN-61.5 issue 6
  • DO-160 C/D/E/F cat A, B and Z
  • MIL-STD-1275 all revisions
  • MIL-STD-704 A/D/E/F, EN2282, AIR2021E
  • Transient suppressor for Avionics/Defense
  • VG96916-5

Series Description
The input bus conditioner LGDS-600 designates a range of 600W military grade front end that enables and eases construction of power architectures. 
The LGDS-600 includes: 
- A powerful voltage limiter for long lasting surges up to 100 Vdc (LGDS600OH) and 200 Vdc (LGDS600PH)
- A 100 Vdc reverse polarity protection 
- A soft-start function to limit inrush current 
- An abnormal surge protection (ASP) to secure applications. 
In addition, the LGDS-600 come with: 
- A control functions to handle power back-up 
- A bi-phase switching frequency generator for synchronization of downstream converters. 
- Ultra low series losses 
As consequence, the LGDS-600 requires only input EMI filtering to fully comply with most of international input bus standards such as: 
- MIL-STD-704 (all revisions) 
- AECMA EN2282 
- GAM-EG13B/AIR2021E 
- DO160E cat A, B      
- MIL-STD-1275 (all revisions)
The input bus conditioner operates according 3 modes of operation: 
- Normal operation: 
When input bus voltage is within its steady state range, the LGDS-600 acts like a buffer that transmits the input power to the DC/DC architecture with low losses. 
- Power fail operation and low transient voltage: The power fail operation occurs when the input bus drops below its low voltage limit. An undervoltage lock-out rise a drive aux signal that can be used to switch converter bus to a back-up power source. 
- Transient operation: The LGDS-600 clamps input transient, limiting its output voltage to the maximum value acceptable by downstream DC/DC architecture.
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-600-O-H Active 600 W 9 - 36 Vdc 100.0 Vdc / 50 ms#MIL-STD-1275 (A to F) 38 +/- 1 Vdc 48.5 x 40.7 x 12.7 mm Basic -40 to 105 °C Metallic black anodized coating 600 +80/-0 KHz Y N 15 W
2.5 W
5 W
7.5 W
LGDS-600-P-H Active 600 W 9 - 36 Vdc 202.0 Vdc / 350 ms#Output disconnected#DEF-STAN-61.5 issue 6, 160.0 Vdc / 200 ms#VG96916-5 38 +/- 1 Vdc 48.5 x 40.7 x 12.7 mm Basic -40 to 105 °C Metallic black anodized coating 600 +80/-0 KHz Y N 15 W
2.5 W
5 W
7.5 W

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.