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Power for demanding environments.

Two lines, one design office. On one side the GaN conversion blocks that go into satellite and defense power chains; on the other the instrumentation we build for industry. Same analog work, same measurement discipline, two sets of constraints.

ECSS · MIL-STD

Space & Defense.

GaN conversion blocks designed for satellite and defense power chains: soft switching, planar magnetics built into the board, full analog control on qualified COTS components, and a documentation package that follows ECSS. The DCX200-GaN isolates, the FSBB200-GaN regulates ahead of it; paired, they form a regulated, isolated chain at about 96 % end to end.

Reference chain: input filters, FSBB200-GaN pre-regulator, DCX200-GaN transformer, point-of-load regulators 21 – 37 V Filters FSBB200-GaN regulates VBUS current image DCX200-GaN isolates, divides POL POL 28 V 5 V 12 V
Reference chain, as on the ADHA power module: the FSBB200-GaN holds the intermediate bus through the DCX current image; the DCX200-GaN isolates and divides. One FSBB200 feeds up to two DCX200. Click a block to jump to its product.
Hardware validated

DCX200-GaN

LLC DC Transformer

Isolated · Unregulated · Fixed ratio

A fixed-ratio isolated bus converter, self-oscillating at resonance: ZVS on the primary side, ZCS on the secondary. Switching losses and EMI both stay low, and the ratio is set by the transformer, not by a control loop.

VIN
21 – 37 V
POUT
+200 W
IOUT
30 A
Isolation
1500 VDC
Datasheet PDF ↓ Flyer

Efficiency

Efficiency over the operating plane

Across the whole 21 – 37 V input range and up to 200 W, on the R3 variant, with cuts at both ends of the input range.

96.4 %Nominal — 28 V / 100 W
96.8 %Peak — 37 V input
90.6 %Worst case — 21 V / 200 W
R3 variant (VOUT = VIN / 3), board at 105 °C, control consumption included. Left: map over the operating plane; right: efficiency against output power at 24 V and 37 V input. Vector PDF

Specifications

TopologyIsolated LLC resonant, self-oscillating, fixed ratio (DCX)
Input voltage21 – 37 VDC (28 V nominal)
Output voltageVIN / N — N = 2, 3 or 4
Output power+200 W — up to 30 A
EfficiencyR4 at 28 V: 97.5 % at full load, 98.0 % at half load
Resonant frequency500 kHz
Power density8 W/cm³
Ratio accuracy±1 %
Resistive drop1.5 % typical
Output ripple30 mVpp
Isolation1500 VDC input to output
PackageThrough-hole module, 12 pins on two rows
Dimensions59 × 33 × 12.88 mm — 40 g
Operating temp.−40 … +105 °C
MTBF1.5 Mh

Features

  • Full analog control — design based on qualified COTS components; can be reproduced in an equivalent CQ1 version with the same level of performance
  • Self-oscillating, full analog design: ZVS on the primary side, ZCS on the secondary side, low EMI
  • Fixed ratio ±1 %, 1.5 % resistive drop, 30 mVpp ripple
  • Three variants at 28 V input: R2T 14 V, R3T 9.33 V, R4T 7 V
  • Protections: adjustable OCP, adjustable UVLO, Enable
  • 1500 VDC input-to-output isolation

Typical applications

  • 48 V bus intermediate conversion (IBC)
  • Satellite and space power systems
  • Telecom power distribution
  • Data-center 48 V to point-of-load
  • Industrial and railway power
DatasheetDCX200-GaNPDF · 693 kBFlyerOne-page summaryPDF · 331 kBMechanicalDimensioned drawingVector PDFUnder NDAWCA, PSA, FMECA, deratingRequest the documentation package
Hardware validated

FSBB200-GaN

Four-Switch Buck-Boost

Non-isolated · Regulated · ZVS

A ZVS four-switch buck-boost that holds the intermediate bus, so the DCX downstream can stay locked at its resonant point. Feedback comes from the DCX primary current, not from an isolated voltage sense.

VIN
21 – 37 V
POUT
+220 W
fSW
500 kHz
η worst case
98.6 %
Datasheet PDF ↓ Flyer

Efficiency

Efficiency over the operating plane

Across the whole 21 – 37 V input range and up to 210 W, at both ends of the output range. Buck, boost and pass-through come from the same control law.

99.0 %28 V / 100 W — 24 V out
98.6 %Worst case — 21 V / 210 W, 24 V out
97.9 %Worst case — 21 V / 210 W, 36 V out
Output at 24 V (left) and 36 V (right). Control consumption excluded. The star marks the worst case, 21 V / 210 W. Vector PDF

Specifications

TopologyFour-switch buck-boost, full ZVS
Input voltage21 – 37 VDC
Output voltage12 – 40 V, adjustable
Output power+220 W — up to 8 A
Efficiency98.6 % at the worst case, 21 V / 210 W; 99.0 % at 28 V / 100 W
Switching frequency500 kHz
Power density16 W/cm³
ControlFull analog, qualified COTS components
FeedbackDCX primary-current image — 80 kHz bandwidth
Regulation±0.3 % line, ±0.5 % load
Load step50 µs recovery on a 25 – 75 % step
IsolationNone — pre-regulator stage
PackageThrough-hole module, 12 pins on two rows
Dimensions45 × 31 × 10.08 mm — 45 g
Operating temp.−40 … +105 °C
MTBF2.0 Mh

Features

  • Full analog control — design based on qualified COTS components; can be reproduced in an equivalent CQ1 version with the same level of performance
  • Full ZVS on the four EPC GaN switches; buck, boost or pass-through from one control law
  • Primary-current feedback: the DCX current image replaces output-voltage sensing
  • 80 kHz bandwidth, 50 µs recovery on a 25 – 75 % load step
  • ±0.3 % line and ±0.5 % load regulation
  • Protections: UVP, OCP, autonomous start-up and supply
  • One FSBB200 feeds up to two DCX200

Typical applications

  • Pre-regulator for the DCX bus converter
  • Intermediate bus architecture (IBA)
  • Satellite and space power conditioning
  • Battery-fed voltage stabilization
DatasheetFSBB200-GaNPDF · 679 kBFlyerOne-page summaryPDF · 320 kBMechanicalDimensioned drawingVector PDFUnder NDAWCA, PSA, FMECA, deratingRequest the documentation package

DIN rail · Process control

Industrial.

The same analog design work, applied to factory floors instead of orbits. Instrumentation and drive electronics where accuracy has to hold over temperature and the equipment has to fail safe.

In production

UST-611

Servo-Valve Current Transducer

Two-channel · DIN rail

Converts the ±10 V set-point of a PLC into coil current for an electro-hydraulic servo-valve. Driving the coil in current makes the hydraulic flow independent of the coil resistance, which rises by 20 % between 0 and 50 °C.

VSUPPLY
18 – 36 V
IOUT
± 40 mA
Accuracy
± 0.1 % FS
Rise time
50 µs
Datasheet PDF ↓

Datasheet

Performance curves

The curves published in the UST-611 datasheet.

Transfer curvesThe six configurable input-to-output laws, 20 mA range, selected by factory links.
Step response0 to full scale into the maximum resistive load, three ranges.
Servo-valve coilStep from 0 to 20 mA into a servo-valve coil, 500 Ω plus 0 to 1 H.
Frequency responseSmall-signal frequency response of the current loop, three ranges.
Supply currentBoth channels loaded, calculated with a 75 % converter efficiency.

Specifications

FunctionClosed-loop current source, two independent channels
Supply18 – 36 VDC, isolated converter per channel
Input± 10 V or ± 5 V, single-ended or differential
Output± 10 mA, ± 20 mA, 4 – 20 mA or ± 40 mA
Transfer curvesSix, set by factory links
Accuracy± 0.1 % of full scale after calibration
Rise time50 µs, no overshoot
Inductive loadStable up to 1 H
IsolationGalvanic, between channels and supply
Monitor output± 10 V current image per channel
PackageDIN-rail box (EN 60715, 35 mm), two 16-point plug-in terminal blocks
Dimensions108 × 45 × 80 mm — 450 g
Operating temp.0 … +50 °C

Features

  • Coil current independent of coil heating
  • Current-limited, short-circuit-proof output
  • Coherence control: the output relay drops the coil when the current leaves the demand
  • Fallback input with adjustable reference
  • PLC watchdog input and status dry contact
  • Front access, shield connection by faston tabs

Typical applications

  • Electro-hydraulic servo-valve drive (torque motor coil)
  • Proportional valve and actuator control
  • Hydraulic test benches and presses
  • Steel, energy and process plant actuators
  • PLC analog output to current-loop conversion
DatasheetUST-611PDF · 494 kBUnder NDAWCA, PSA, FMECA, deratingRequest the documentation package

Need one of these re-dimensioned?

Every block here is a design we own end to end — topology, magnetics, analog control, layout and test. Bus voltage, power level, form factor and environment are inputs, not fixed properties. Tell us yours.

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Technical data on this page is preliminary and provided for information only. Flight-grade part selection, deratings and qualification status are defined per project. Worst-case analysis, part stress analysis, FMECA and the full ECSS documentation package are available under NDA.