Industrial Grade, DC/DC Transient Protection Module, 50 W

General Characteristics

  • Additional functions : on/off
  • Galvanic isolation input/output : non isolated
  • Power range : from 4 W to 50 W
  • Protections : input reverse polarity
  • RoHs

Key Features

  • EN50155 level 1800V & 8400V
  • EN61000-4-5 level 4
  • RIA 12
  • Spike suppressor for Railway/Industrial

Series Description
The GAIA Converter limitor LGDSI-50 Series designates an active power adaptor module designed to protect electronical systems against fast transient and high spike levels that can occur from an input bus line with no voltage stabilization devices. The LGDSI-50 delivers an adapted output voltage compliant with GAIA Converter DC/DC range of modules. 
This line of module is optimized to provide high efficiency up to 98% over the whole power range between 4 W and 50 W power. The module includes also an EMI filter to provide compliance with EN55022 Class A together with GAIA Converter DC/DC modules. 
The module is manufactured in a fully automated process to guarranty high quality. Each module is tested with a GAIA Converter automated test equipment. The LGDSI-50 features 2 modes of operations as follow: 
- Normal operation:Normal operation occurs when input bus line is in steady state permanent range. The LGDSI-50 is then operating in steady transparency state providing an output with a typical 1.5 V drop-out voltage. 
- Transient and spikes operation: The LGDSI-50 can sustain both: transient during 1 s and 20 ms according to RIA12 or EN50155 requirements, high spike levels up to 1.8 kV with 5 Ohms impedance and 8,4 kV with 100 Ohms impedance to meet international input bus standards of EN50155, RIA12 or IEC 571.
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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
LGDSI-50-J-K Active 50 W 10 - 36 Vdc 40.0 Vdc / 1 s, 85.0 Vdc / 20 ms 40 max Vdc 1.78 A 40.2 x 26.2 x 12.8 mm ON/OFF, REV.POL TBD Vdc EN-55022 -40 to 95 °C Metallic black anodized coating 28 Grams N N
LGDSI-50-Q-K Active 50 W 36 - 154 Vdc 165.0 Vdc / 1 s, 385.0 Vdc / 20 ms 40 max Vdc 1.78 A 40.2 x 26.2 x 12.8 mm ON/OFF, REV.POL TBD Vdc EN-55022 -40 to 95 °C Metallic black anodized coating 28 Grams N N

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.