Engineered with planar magnetics, multi-phase synchronous rectification, and IP68 potted structural aluminum enclosures for maximum operational reliability.
Founded in 2015 and operating out of a 3,000m² state-of-the-art facility in Anle Industrial Zone, Shenzhen, Shenzhen Eltrum Electronic is an onsite-verified manufacturer specializing in non-isolated and isolated power conversion modules, lithium battery chargers, and dynamic stabilization units.
Unlike trading entities, we execute full-cycle manufacturing: in-house SMT placement lines, high-frequency transformer and planar inductor precision winding, multi-stage automated optical inspection (AOI), complete epoxy/polyurethane potting under vacuum to eliminate micro-cavities, and 100% full-load elevated-temperature (50°C) burn-in cycles for every production lot.
A deep analysis into thermodynamic optimization, synchronous MOSFET gating, transient protection, and common-ground architecture in high-density DC power electronics.
In conventional non-isolated buck or boost circuits, freewheeling Schottky diodes generate forward-voltage drops ranging from 0.4V to 0.7V. When handling 50A to 100A output currents, diode dissipation alone consumes 20W to 70W of wasted thermal power, requiring oversized finned heatsinks and compromising packaging density.
Eltrum's CE-certified non-isolated DC-DC converter series leverages low RDS(on) N-channel power MOSFETs (often under 2.5mΩ) driven by dedicated synchronous rectification controller ICs with sub-microsecond dead-time control. This reduces conduction losses by more than 82%, allowing our modules to operate at continuous conversion efficiencies between 95% and 98.2% across wide voltage brackets.
Commercial vehicle systems (24V systems conforming to ISO 7637-2 and ISO 16750-2) and off-grid renewable battery installations expose DC-DC conversion hardware to severe electrical disturbances. When large inductive loads disconnect suddenly, alternator load dumps generate spikes exceeding 100V for several hundred milliseconds. Conversely, automotive starter activation triggers "cold crank" conditions, collapsing a 12V bus to as low as 6V.
Our non-isolated buck-boost modules resolve this dual threat through a four-switch buck-boost bridge topology. The module smoothly shifts between bucking mode, boost mode, and mixed transfer modes depending on the live input-to-output delta, maintaining output rail stability to within ±1% across all dynamic input events.
| Module Architecture | Input Delta to Output | Typical Efficiency | Ground Configuration | Ideal Application |
|---|---|---|---|---|
| Non-Isolated Buck | Vin > Vout + 2V | 95% – 98% | Common Negative (GND) | Truck 24V step-down to 12V accessories; Golf cart 48V to 12V lighting |
| Non-Isolated Boost | Vin < Vout - 1V | 94% – 97.5% | Common Negative (GND) | 12V vehicle battery raising to 24V/48V motors; Marine winches; LED strings |
| 4-Switch Buck-Boost | Vin swings above & below Vout | 92% – 96% | Common Negative (GND) | Battery stabilizers for radio/nav gear; LiFePO4 multi-voltage charging banks |
| Galvanic Isolated | Wide brackets (e.g. 18–75V) | 88% – 92% | Isolated Input / Output | Telecom floating rails, medical electronics, high-EMI industrial grounding |
Shock, mechanical resonance, saltwater intrusion, and chemical fumes are the primary killers of switch-mode power supplies in marine and heavy-equipment deployments. Eltrum addresses structural survivability by housing every industrial module within precision-machined, hard-anodized or die-cast aluminum alloys.
Modules are completely encapsulated using high-purity thermal conductive organosilicon potting compounds (rated UL94V-0 for flame resistance). The silicone matrix achieves dual functions: it creates an airtight IP67/IP68 ingress barrier and conducts heat directly from power inductors and MOSFET tabs directly out into the external finned enclosure, mitigating internal thermal hot spots without prone mechanical cooling fans.
How global supply chain dynamics, Wide Bandgap (WBG) semiconductors, and software-defined bus topologies are reshaping DC-DC procurement for 2025–2030.
Procurement teams are prioritizing Wide Bandgap (Gallium Nitride and Silicon Carbide) switches. By cutting switching losses by more than 60%, GaN facilitates operating switching frequencies up to 500kHz–1MHz, shrinking magnetic inductor footprints by half and multiplying power densities up to 40W/in³.
Fixed-output modules are giving way to intelligent devices carrying integrated RS485 (MODBUS) and CAN bus telemetry. Procurement managers for autonomous AGVs and smart RV electrical systems require real-time reporting of thermal dissipation, load current, voltage drop, and active fault states.
Global original equipment manufacturers are rejecting long 26-week lead times from legacy western brands. Sourcing strategies focus on agile ISO-certified Asian manufacturing partners that maintain raw component safety buffers and deliver OEM/ODM variants (custom connectors, wire harnesses, altered voltage thresholds) within 2–4 weeks.
A step-by-step methodology to avoid oversizing costs, common-mode ground loop pitfalls, and unexpected field warranty claims.
Always verify the absolute minimum input voltage under heavy load rather than nominal voltage. If a 12V battery drops to 9.5V during heavy load, a standard buck module feeding a 12V output will enter drop-out oscillation. In this situation, choose a buck-boost topology.
Because non-isolated modules connect the input return directly to the output return across a solid ground plane, ensure that no differential potentials exist between source and load chassis grounds. If safety standards demand independent floating grounds (e.g. 48V telecom rectifiers), isolated models must be specified.
Motors, halogen projectors, refrigeration compressors, and capacitive inputs pull startup currents 300% to 600% higher than running ratings. Specify a converter rated at 1.3× to 1.5× your target continuous draw to ensure the over-current protection circuit is not triggered during startup.
Detailed technical answers addressing design requirements, certifications, sample ordering, and custom manufacturing options.
Accelerate your project timeline. Contact our Shenzhen technical team directly to receive complete dimensional CAD drawings, comprehensive EMC compliance reports, and direct OEM pricing.