Hi-Rel Grade, DC/DC Hold-Up, 300 W

General Characteristics

  • Additional functions : monitoring signals, programmable capacitor charge voltage from 31 to 80 Vdc, programmable power fail threshold
  • Charger switching frequency : 700
  • Galvanic isolation input/output : non isolated
  • Power range : from 4 W to 300 W
  • Protections : reverse polarity
  • RoHs

Key Features

  • Dedicated to DO-160, MIL-704
  • Reduce capacitance value by 80%
  • Unique product for hold-up solutions

Series Description
The GAIA Converter Hold up device HUGD-300 provides a state-of-the-art solution to the problem of maintaining electronic system in operation during input bus drop-out. Usually this approach uses very large capacitors because they are only charged at the voltage at which power fails. The GAIA Converter HUGD-300 module provides an alternative solution to reduce the amount of capacitance needed by charging the hold up capacitor at a high voltage value (adjustable from 31 to 80 VDC). It includes also a reverse polarity protection. 
The HUGD-300 needs to be connected between the input line source bus and DC/DC modules. If an EMI filter and / or a pre-regulator is used, the HUGD-300 has to be connected between them and the converters. Basically the HUGD-300 charges an external capacitor while powering the DC/DC converters. If the input voltage source bus drops out (power fail mode), the HUGD-300 powers the converter through the external capacitor. 
The HUGD-300 can be used with any GAIA DC/DC converter as the capacitor voltage is externally adjustable up to 80 Vdc. 
The HUGD-300 features 3 modes of operations: 
- Charging operation mode : when the input voltage ramps-up and reaches the start-up charge threshold (which is set at the "power fail voltage" value), the HUGD-300 begins to charge the external capacitor while powering the dc/dc converter. The charging current is limited as it is a constant power charger. When the capacitor voltage reaches 90% of its final set value, the signal "capacitor charged" is activated and the HUGD-300 enters in the normal operation mode. 
- Normal operation mode : in normal operation mode when the capacitor is charged and the input bus is between the "power fail" and 100VDC, the HUGD-300 only consumes low power to keep the capacitor charged. The HUGD-300 operates indefinitely in this state until the input voltage drops below the "power fail voltage" threshold. 
- Power fail mode : when the input voltage drops below the "power fail voltage" threshold, a "power fail" signal is activated and the HUGD-300 switches converter input to the hold-up capacitor. At this point the DC/DC converters are powered by the capacitor. When its voltage finally discharges to a value slightly above the "power fail voltage" threshold value, a "capacitor discharged" flag is activated.
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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 Output current Case dimensions Standard electrical functions Adj. hold-up capa final voltage Hold up mode threshold voltage Operating case temp. range Case material Charger switching frequency DC resistance UVLO min Voltage drop @ I max Weight Options RoHS / SnPb
HUGD-300 Active 300 W max. 30 A 40.2 x 26.2 x 12.8 mm CC, CD, PF, REV.POL 30 to 80 Vdc Adj. 6 to 20 Vdc -40 to 105 °C Metallic black anodized coating 700 KHz 30 Grams 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.