ISO 9001:2015 · CE · RoHS · FCC Certified OEM/ODM

Custom OEM High Power DC DC Converter Factory & Supplier

Engineered galvanic isolation, ultra-wide input ranges (9V–120VDC), synchronous rectification, and rugged IP68 topologies for mission-critical industrial, telecom, automotive, and renewable energy deployments.

Precision Power Portfolio

High Power Conversion Modules & Engineered Units

Each DC-DC converter and power transformation unit manufactured in our facility undergoes 100% full-load aging tests, thermal imaging scans, and dynamic load stress protocols. Explore our core configurations below:

Step Down 10-26VAC to 5V 3A 5A AC DC Buck Step Down Voltage Power Converter

10~26VAC to 5V 3A 5A AC-DC Buck Converter

  • Topology:Synchronous Buck
  • Input Range:10V–26V AC (12V-36V DC)
  • Output:5V DC @ 3A–5A (15W–25W)
  • Protection:OVP, OCP, Short Circuit
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Isolated Isolated 72v 60v 48v to 24v Dc to Dc Step Down Buck Converter

Isolated 48V/60V/72V to 24V Buck Converter

  • Galvanic Isolation:1500V DC Isolation
  • Input Range:36V–90V Wide DC
  • Output:24V DC Regulated
  • Efficiency:Up to 94.5% Peak
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500W High Power Isolated Step Down DC DC Converter 48V 60V 72V 90V to 12V 42A 500W DC Charger Converter

Isolated 48V-90V to 12V 42A 500W Converter

  • Power Rating:500W High Density
  • Input Range:48V / 60V / 72V / 90V DC
  • Output:12V DC @ 42A Continuous
  • Application:EV & Heavy Telecom Bus
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Compact USB YUCOO 12v to 5v Converter Buck Module Usb Output Adapter Dc Car Power Converter

YUCOO 12V to 5V USB Vehicle Step-Down

  • Input Range:9V–22V DC Car Battery
  • Output:5V DC Dual USB Port
  • Encapsulation:IP67 Epoxy Potted
  • Low Quiescent:< 12mA No-load Current
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Buck-Boost DC-DC Voltage Converter Made in China 9-32VDC to 12VDC 12A 144W Step up Down Converter

9-32V to 12V 12A 144W Buck-Boost Converter

  • Operating Mode:Automatic Step-Up/Down
  • Input Range:9V–32V Ultra-Wide
  • Output:12V DC @ 12A Stable
  • Casing:Die-Cast Aluminum Heat Sink
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DC-AC Pure Sine Pure Sine Wave Inverter 300W DC12V 24V 48V 60V 72V to AC110V 220V Power Converter

300W Pure Sine Wave DC-AC Power Inverter

  • DC Inputs:12V / 24V / 48V / 60V / 72V
  • AC Outputs:110V / 220V Pure Sine
  • THD:< 3% Total Harmonic Distortion
  • Cooling:Smart PWM Thermal Fan
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High Voltage Factory Price High Voltage Regulator 84v to 12v 15A 180W Dc Buck Converter

84V to 12V 15A 180W DC Buck Voltage Regulator

  • Nominal Input:84V (60V–100V Transient)
  • Regulated Output:12V DC @ 15A Steady
  • Thermal Derating:Operates up to +85°C
  • Mounting:Flanged Chassis Mount
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Phase & Frequency Rotary Phase Converter AC 110v 220v 60hz 50hz Single Phase to 3 Phase Converter

Single Phase to 3-Phase Rotary Converter

  • Input Voltage:110V / 220V AC 1-Phase
  • Output Delivery:220V / 380V AC 3-Phase
  • Frequency:50Hz / 60Hz Variable
  • Inductive Capacity:Heavy Motor Start Torque
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23+
Years Engineering Expertise (Est. 2003)
10+
Specialized Production & SMT Lines
1,229 m²
SGS Onsite Verified Facility
98.2%
Rapid Technical Response Rate
Technical Architecture

High Power DC-DC Topologies: Engineering White Paper

Selecting or designing a custom high-power DC-DC converter requires in-depth evaluation of switching stress, thermal dissipation, galvanic isolation margins, and electro-magnetic compatibility (EMC).

Advanced Resonant LLC & Synchronous Topologies

Standard non-synchronous switching schemes suffer severe diode conduction losses when processing hundreds of amperes or stepping down high-voltage direct currents. At our manufacturing facility, high-power DC-DC platforms leverage zero-voltage switching (ZVS) LLC resonant converters and bidirectional phase-shifted full-bridge (PSFB) circuits with active synchronous rectification.

By substituting ultrafast recovery diodes with ultra-low \(R_{DS(on)}\) power MOSFETs driven by high-speed digital controllers, internal power loss is curtailed by up to 65%. This enables continuous 500W to 5,000W DC-DC conversion within tightly constrained sub-rack enclosures without requiring forced-air liquid manifolds.

  • Planar Magnetics Integration: Replaces bulky wire-wound inductors with multilayer PCB copper traces, yielding an exceptional power density beyond 45W/in³.
  • Galvanic Isolation Barrier: Reinforced optocoupler and magnetic isolation designed for 1,500V DC to 3,000V AC dielectric withstand (Hi-Pot tested).
  • Wide Bandgap (WBG) Silicon Carbide (SiC): High-voltage stages employ SiC Schottky diodes and MOSFETs to eliminate reverse recovery charge.
Varnix manufacturing floor for custom power supplies and converters
Topological Parameter Isolated Buck / Resonant LLC Non-Isolated Synchronous Buck Multi-Phase Buck-Boost
Primary Galvanic Isolation 1,500V DC – 3,000V AC (Opto/Magnetic) None (Shared Ground Plane) None (Common Negative Bus)
Common Input Ranges 36V–72V, 48V–90V, 150V–400V DC 12V–24V, 24V–48V DC 9V–32V, 18V–60V DC
Typical Efficiency Range 92.0% – 95.5% 95.0% – 98.2% 93.0% – 96.0%
Noise & Ripple Characteristics Ultra-Low Differential & Common Mode Moderate (Demands External LC Filter) Moderate (Depends on PWM Frequency)
Ideal Application Sector Telecom Central Offices, Mining, EV Traction On-board Automotive Electronics, IoT Regulators Variable Battery Banks, Starlink Marine Arrays
Strategic Sourcing Intelligence

Future Procurement Trends in High Power DC-DC Conversion

Global supply chain shifts, higher DC bus architectures, and carbon neutrality directives are reshaping how procurement officers and technical leads source OEM power conversion hardware.

Transition to 800V & 1500V DC Distribution

Commercial fleets, heavy EV charging depots, and utility-scale BESS are migrating from legacy 400V DC buses toward 800V and 1500V architectures. Sourcing directors must partner with OEM factories possessing verified high-voltage clearance, creepage engineering, and partial discharge testing capabilities.

Trend Focus: Creepage > 8mm & SiC Topologies

Dual-Node Logistics: Factory Direct + Overseas Hubs

Geopolitical risks and lead-time volatility demand hybrid fulfillment models. Forward-looking distributors combine containerized high-volume ocean shipments from our ISO 9001 facility with instant JIT fulfillment from our US Overseas Warehouse for mission-critical standard converters.

Trend Focus: 48-Hour North American Dispatch

Demand for Harsh-Environment Hermetic Potting

Industrial IoT, marine satellite dishes, and agricultural automation require converters to survive continuous salt-fog, thermal shock cycles (-40°C to +85°C), and high vibration. Vacuum-injected thermally conductive polyurethane and silicone resin (IP68) have become baseline procurement requirements.

Trend Focus: MIL-STD-810H & IP68 Enclosures
R&D Horizons

Emerging Technology Trends in DC-DC Conversion

Where engineering meets manufacturing scalability: next-generation power electronics are defined by wide bandgap semiconductors, software-defined telemetry, and modular stacking.

Gallium Nitride (GaN) for Megahertz Switching

Integrating e-mode GaN FETs allows switching frequencies to jump from 100kHz into the multi-megahertz bracket. This exponential frequency rise dramatically decreases the physical volume of magnetic inductors and smoothing capacitors, producing ultra-slim converter modules for edge robotics.

Digital PMBus & CAN 2.0B Smart Telemetry

Analog closed loops are being superseded by ARM Cortex and 32-bit DSP controllers. Real-time telemetry reporting input/output voltage, load amperage, junction temperatures, and fault warnings over PMBus, CANopen, or RS-485 empowers predictive maintenance in cloud data facilities.

N+1 Active Current Sharing Parallel Arrays

Modern infrastructure eliminates single points of failure. High-power modular DC-DC systems feature integrated droop current-sharing or active bus sharing, allowing up to 16 converter blocks to operate smoothly in parallel to scale from 1kW up to 50kW without thermal runaway.

Factory Direct Reliability

Why Tier-1 Engineers & OEMs Partner with Varnix

Founded in 2003 in Guangdong, China, Varnix Technology Co., Ltd. has spent over two decades engineering robust switching converters, pure sine wave inverters, and telecom rectifiers.

Varnix converter assembly and soldering lines

Uncompromising Onsite Manufacturing & Testing

Unlike trading entities that outsource production, Varnix maintains full ownership of welding, wave-soldering, casing assembly, curing, and automated quality testing across 10+ dedicated lines verified onsite by SGS Group.

  • 100% Thermal Burn-In Aging: Every high-power unit is subjected to an exhaustive 4 to 8 hour burn-in chamber run under 100% rated resistive and inductive loads.
  • Precision Oscilloscope Waveform Verification: Switching jitter, peak-to-peak ripple voltage (<50mV typ.), and transient load overshoot are strictly validated.
  • Total OEM/ODM Customization: Non-standard DC inputs (e.g., 84V, 96V, 110V), custom extruded aluminum housings, military connectors, and custom firmware algorithms.
Oscilloscope and precision multimeter testing of converters
Stage-3 Electrical & Waveform Verification
Varnix workshop production line overview
SGS Verified Assembly Workshop
Dedicated soldering and assembly stations
Manual & Automated Soldering Workstations
Procurement Due Diligence

Frequently Asked Questions for Custom DC-DC Converters

Clear, technical answers to common design, commercial, and regulatory inquiries submitted by engineering managers and international sourcing teams.

What is the difference between isolated and non-isolated high power DC-DC converters?
Isolated DC-DC converters utilize a high-frequency planar or toroidal transformer to break the electrical conduction path between the input power source and the output load ground. This galvanic barrier (typically rated from 1,500V DC to 3,000V AC) protects sensitive control microprocessors, eliminates ground-loop noise in communication equipment, and prevents catastrophic line-voltage pass-through in the event of primary switch breakdown. Non-isolated converters share a common negative ground, offering higher electrical conversion efficiency (96%–98%) and a smaller footprint, making them suitable when input and output grounds can safely co-exist without voltage-surge transmission risks.
How do you manage heat dissipation on 500W+ sealed IP68 converters?
For sealed, fanless IP68 rated converters (such as our 500W 48V-to-12V modules), thermal management is engineered directly into the hardware geometry. We utilize monolithic aluminum die-cast housings with high aspect-ratio longitudinal cooling fins. Internally, all power MOSFETs, magnetic transformers, and rectification bridges are mounted with ceramic thermal pads directly against the metal casing. The entire enclosure is then vacuum-injected with high thermal conductivity (>1.5 W/m-K) UL94-V0 flame-retardant silicone or polyurethane potting compound, preventing internal hotspots and evenly distributing heat across the entire exterior chassis.
Can Varnix customize non-standard input voltages (e.g., 60V, 84V, 96V, 110V DC)?
Yes. As an authentic OEM/ODM manufacturer with in-house R&D, we routinely tailor switching stages for non-standard battery buses, including 60V/72V/84V light EV systems, 96V AGV battery architectures, and 110V/220V railway/utility DC buses. Customizations include adjusting the primary turns-ratio on our planar transformers, altering PWM controller compensation networks, selecting high-voltage rated SiC MOSFETs, and configuring low-voltage disconnect (LVD) and over-voltage lockout thresholds to match your specific battery chemistry.
What testing documentation and certifications accompany OEM shipments?
Our quality system is certified to ISO 9001:2015, and our converters conform to CE (LVD/EMC), RoHS, and FCC Part 15 standards. Every commercial production batch can be supplied with comprehensive quality documentation upon request, including: 100% Factory Burn-In Certificates, Hi-Pot Dielectric Withstand Test Logs, Ripple & Noise Oscilloscope Records, and Material RoHS Compliance declarations. Factory audits and container inspections conducted by SGS, TÜV, or buyer-appointed third parties are fully welcomed.
What are the minimum order quantities (MOQ) and production lead times?
Standard catalog converters—such as 12V to 24V step-up modules, 24V to 12V buck regulators, or 48V telecom converters—have a minimal MOQ starting from 1 to 10 units to support prototyping and pilot trials, with rapid dispatch available from our US overseas inventory or China factory floor. Fully customized OEM/ODM projects (custom PCB layouts, unique voltage bands, bespoke metal extrusions, and private labeling) typically carry an MOQ of 100 to 500 units, with prototype samples turned around in 10 to 18 business days.
How do you safeguard against output voltage overshoot during sudden load steps?
Our analog and digital feedback networks incorporate type-III compensation amplifiers and high-speed optocouplers that sample output voltage rail dynamics within microseconds. When a heavy inductive or resistive load (e.g., a 40A actuator or high-power radio transmitter) switches off instantly, our fast-transient loop clamp limits voltage overshoot to < 5% of nominal rail voltage, settling back into regulation within 200 microseconds to safeguard downstream microelectronics against over-voltage damage.

Ready to Engineer Your Custom High Power DC-DC Solution?

Consult directly with our Guangzhou factory engineering team. Share your target input voltage window, continuous output amperage, isolation requirements, and housing constraints for a prompt B2B proposal and technical DFM analysis.

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