DC/DC Front-End Modules

Simplifying your future

GAIA Converter’s DC/DC Front-End Modules simplify power architecture design, reduce external component count, and deliver robust, efficient, and reliable power solutions for aerospace, defense, and industrial applications.

Front ends are required to build avionic miltary, aerospace railway and industrial power electrical supplies.

Our DC DC modules are compliant with MIL-STD-1272, MIL-STD704, MIL-STD461,DO160,ABD100, DefStan 59-411 Part 3, DefStan 61-5 part 6 VG 96916-5,VG 95373-20, EN50155 standards.

EMI filter
Reverse polarity
Surge limiter
Under voltage limiter
Inrush current limitation
Hold up: Transparency during momentary input bus interruptions – drop outs
On/Off
Supply of additional signals to ensure perfect power supply management

GAIA Converter offers different types of modules as follows:

Multi function front-end modules

Single function modules

DC DC front end modules functions and applications

LHUG-150N synoptic

PGDS-50 Block Diagram

GAIA’s “Input Bus Conditioners” modules integrate one or more DC/DC Front-End functions, such as EMI filtering, reverse polarity protection, surge and undervoltage limitation, inrush current control, hold-up functionality for transparency during input bus dropouts, On/Off control, and the delivery of complementary signals to ensure optimal power supply management.

EMI filter, reverse polarity, surge limiter, under voltage limiter, inrush current limitation, hold-up: transparency during momentary input bus drop-outs, On/Off, supply of complentary signals to ensure perfect management of power supply

GAIA Converter offers 4 Input Bus Conditioner product lines:

LGDS Series : Limiter modules whose main function is the limitation of high voltage transients of input bus
PGDS Series : Pre-regulated modules whose main function is to boost low voltage and clamp high voltage transients to fit dc/dc converter input range
LHUG : Modules whose main functions, among others, are reverse polarity protection limitation of high voltage transients and Hold Up
FLGH Series : Modules whose main functions, among others, are EMI filtering, reverse polarity protection limitation of high voltage transients and Hold Up.The FLHG serie are fully integrated module that require only dc/DC converter to buil a complete compliant PSU.

Gaia Converter’s Input Bus Conditioners modules brings high performances to military, avionic, aerospace and railway industry :

Manages input bus transients over-voltage (surge)
Provides reverse polarity protection
Limits inrush current for safer system start-up
insure compliance to standard
DC DC modules protects downstream converters from 80vols 100ms, 100 volts 50ms, 202V 300ms surimposed to 28 volts, 24 volts 36 volts, 270 volts input bus

Input Bus Conditioners Series

Series	Output power	Input voltage	Max transient input voltage	Min transient input voltage	Output voltage	Output current	GAIA Overall package	Charger power	Power dissipation	EMI Filter	Spike protection	Reverse polarity	On/Off	Output transient limiter	Hold-up	Transient elevator	Synchronization	Standard electrical functions
	50 W 60W 75 W 90 W 100 W 150 W 300 W 600 W						1.6-1.0-0.3 1.6-1.0-0.5 1.6-1.25-0.3 2.0-1.6-0.5			Basic EN 55121 EN-55022 MIL-STD-461							IN/OUT N OUT Y	ICL OCP ON/OFF OPP OTP PF REV.POL SYNC UVLO
FLHG-60	60W	(M) : 10.7 - 100 Vdc	(M) : N/A	(M) : 11.2 Vdc /	[S] 80 Vdc	0.75 A 3.75 A 5.5 / 30 A/s	2.0-1.6-0.5			MIL-STD-461	N	Y	Y	Y	Y	N	N
FLHGI-90	90 W	(R) : 12 - 140 Vdc	(R) : 385 Vdc / 20 ms	(R) : N/A	[S] 12 - 140 Vdc	0.9 A 4 A	2.0-1.6-0.5	6 W		EN 55121, EN-55022	N	Y	Y	Y	Y	N	OUT
LGDS-100	100 W	(P) : 9 - 42 Vdc	(P) : 202 Vdc / 350 ms	(P) : 7 Vdc / 1 s	[S] 9 - 42 Vdc	10 A	1.6-1.0-0.5			Basic	N	N	N	Y	N	N	N	ICL, OCP, OTP
LGDS-300	300 W	(O) : 9 - 42 Vdc	(O) : 100 Vdc / 50 ms	(O) : 7 Vdc / 1 s	[S] 9 - 42 Vdc	20 A	1.6-1.0-0.5		3 W	Basic	N	N	N	Y	N	N	N	ICL, OCP, OTP
LGDS-600	600 W	(O) : 9 - 36 Vdc (P) : 9 - 36 Vdc	(O) : 100 Vdc / 50 ms (P) : 202 Vdc / 350 ms#Output disconnected	(O) : N/A (P) : N/A	[S] 38 +/- 1 Vdc	35 A	2.0-1.6-0.5		15 W 2.5 W 5 W 7.5 W	Basic	N	Y	Y	Y	N	N	Y
LGDSI-50	50 W	(J) : 10 - 36 Vdc (Q) : 36 - 154 Vdc	(J) : 85 Vdc / 20 ms (Q) : 385 Vdc / 20 ms	(J) : N/A (Q) : N/A	[S] 40 max Vdc	1.78 A	1.6-1.0-0.5			EN-55022	Y	Y	Y	Y	N	N	N	ON/OFF, REV.POL
LGDSI-75	75 W	(Q) : 43 - 154 Vdc	(Q) : 165 Vdc / 1 s	(Q) : N/A	[S] 40 max Vdc	1.78 A	1.6-1.0-0.5			EN-55022	Y	Y	Y	Y	N	N	N	ON/OFF, REV.POL
LHUG-150	150 W	(M) : 11- 80 Vdc	(M) : 100 Vdc / 50 ms	(M) : N/A	[S] 78 max Vdc	10 A	1.6-1.25-0.3	17 W	13 W	MIL-STD-461	N	Y	Y	Y	Y	N	IN/OUT	UVLO, OPP, SYNC, PF, REV.POL
PGDS-50	50 W	(N) : 17 - 37 Vdc (O) : 12 - 37 Vdc	(N) : 80 Vdc / 100 ms (O) : 100 Vdc / 50 ms	(N) : 10 Vdc / 30 s (O) : 6 Vdc / 1 s	[S] 9 - 36 Vdc		1.6-1.0-0.3			Basic	N	Y	Y	Y	N	Y	N	UVLO, ON/OFF
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Values of Inputs: each value is associated to the GAIA Converter code (between brackets)
Values of Outputs: each value is associated to Output Number (between brackets)
GAIA overall package: GAIA specific designation based on dimensions in inches with a tolerance around ± 10% – Consult DataSheet for precise dimensions
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
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

EMI Filters

GAIA Converter proposes a full family of state-of-the-art EMI filter modules to fulfill Electromagnetic Interferences (EMI) requirements for Aerospace/Defense applications in a very compact and low loss solution for applications requiring up to 35 amps of input current.

Our EMI Filter modules will help your power supply comply with major standards (MIL-STD-461 rev C, D, E and F – DO-160 rev C, D, E F and G).

All High-Rel filter performances are met across severe environments and operating temperatures of -40°C/+105°C (-55°C also available), and operating and storage temperatures of -55°C/+125°C.

The 100V filter range incorporates an inrush current limiter for the capacitors integrated in the filter. Combined with the “Input Bus Conditioners” modules, they allow the overall architecture of the power supply to respect the current inrush limits imposed by the D0160 and ABD100 standards.

EMI filters allows to protect input bus from high frequency

Ensure compliance with EMC standards DO160,ABD100, MIL-STD461,DefStan 59-411 Part 3, VG 95373-20

Reduce conducted and radiated noise
Filter comon mode and differential mode current noise
Improve overall system performance and reliability

EMI Filters Series

Reset filters

Characteristics

Grade Data Sheets RoHS / SnPb Input voltage Output current GAIA Overall package More characteristics ...

Series	Output power	Input voltage	Output current	GAIA Overall package	DC resistance	Standard electrical functions
	2 A - 50 V 6 A - 100 V 10 A - 50 V 12 A - 100 V 20 A - 50 V 35 A - 100V 35 A - 50 V			1.0-0.8-0.3 1.25-1.0-0.3 1.25-0.8-0.4 1.6-1.0-0.65 1.6-1.0-0.5		ICL
FGDS-2A-50V	2 A - 50 V	9 - 50 Vdc	2 A	1.25-0.8-0.4	80 mOhm
FGDS-6A-100V	6 A - 100 V	4.5 - 100 Vdc	6 A	1.0-0.8-0.3	30 mOhm	ICL
FGDS-10A-50V	10 A - 50 V	9 - 50 Vdc	10 A	1.6-1.0-0.5	11 mOhm
FGDS-12A-100V	12 A - 100 V	4.5 - 100 Vdc	12 A	1.25-1.0-0.3	30 mOhm	ICL
FGDS-20A-50V	20 A - 50 V	9 - 50 Vdc	20 A	1.6-1.0-0.65	5 mOhm
FGDS-35A-50V	35 A - 50 V	9 - 50 Vdc	35 A	1.6-1.0-0.65	5 mOhm
FGDS-35A-100V	35 A - 100V	4.5 - 100 Vdc	35 A	1.6-1.0-0.65	5 mOhm
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High-Reliability Hold Up Modules

The HUGD Series

GAIA Converter Hold-up devices are an alternative solution to the use of batteries or bulk capacitors to negate problems related to momentary input bus drop-outs.

The GAIA Converter HUGD series provides an alternative solution to reduce the amount of capacitance needed by charging the hold-up capacitor at a high voltage value. The device is connected between the input line source bus and DC/DC modules.

Gaia’s Converter Hold Up products provide a state-of-the-art solution to the problem of maintaining electronic system operation during input bus power drop-out.

Store energy to maintain output during input power interruptions
Extend ride-through time
Ensure continuous operation of critical systems
Boost capacitor voltage to reduce drastically the capacitor value
Control capacitor charging current

Fig. HUGD-300 Synoptic

HUGD-300 Synoptic Timing Diagram

Hold-Up Series

Series	Output power	Input voltage	Output current	GAIA Overall package	Hold-up thres. voltage	Max. output V x I	Standard electrical functions
	50 W 300 W			1.6-1.0-0.5	9.5 to 15.3 Vdc Adj. 6 to 20 Vdc		CC CD PF REV.POL
HUGD-50	50 W	9 - 40 Vdc	5.6 A	1.6-1.0-0.5	9.5 to 15.3 Vdc	50 W	CC, CD, PF, REV.POL
HUGD-300	300 W	8 - 100 Vdc	max. 30 A	1.6-1.0-0.5	Adj. 6 to 20 Vdc	300 W	CC, CD, PF, REV.POL
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DC/DC front end modules advantages

The advantages of DC/DC modules for industries are :

Compact and lightweight, ideal for SWaP-constrained applications
High efficiency and reliability, designed for rugged environments
Compliant with international military and aerospace standards
Compatible with Gaia’s DC/DC converters, ensuring seamless system integration

Input Bus Conditioners

Gaia Converter’s Input Bus Conditioners are designed to protect, filter, and stabilize the input power to downstream DC/DC converters and electronic systems. These modules ensure compliance with stringent power quality standards required in aerospace, defense, transportation, and other rugged applications.