High Demand
Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- TopologyDC-DC Multi-Stage Boost
- Input Voltage12V DC (Nominal)
- Output Power43.8V DC @ 13A CC/CV
- Ingress RatingIP67 Fully Sealed
Industrial Power Solutions
High-Efficiency Power Conversion Systems
Engineered for high resilience in telecommunications, marine vessels, off-grid renewables, electric fleet mobility, and mission-critical robotics automation.
Flagship Series
1500W Wide-Input Adjustable Buck-Boost Regulator
- TopologySynchronous Buck-Boost
- Input Range10V – 60V DC Wide
- Output Modes12V / 24V / 28V / 48V
- Bus ProtocolIntegrated RS485 Modbus
LiFePO4 Fleet
600W IP65 Waterproof AC-DC Smart Battery Charger
- Mains Input90V – 264V AC Universal
- Battery ChemistriesLiFePO4 / NMC / Lead
- Adjustable Out14.6V – 58.4V Dynamic
- Thermal MgmtCold-Plate Conduction
High Current
24V to 12V 100A Heavy-Duty Step-Down Buck Unit
- TopologyMulti-Phase Sync Buck
- Input Voltage18V – 35V DC
- Current OutputUp to 100A Continuous
- Efficiency Peak> 96.5% Typical
Galvanic Isolation
Isolated Ultra-Wide 18V-90V to 12V Industrial Module
- Dielectric Isolation1500V DC Ground Barrier
- Input Dynamic18V – 90V DC Traction
- Nominal Output12V @ 10A Constant
- EMI/RFI ComplianceEN 55032 Class B
Auxiliary Marine
400W Dual-Battery Direct Alternator DC-DC Charger
- Charging ModeIntelligent 3-Stage CC/CV
- System Rail10V – 36V Wide Input
- Regulated Output14.6V / 29.2V Selection
- ProtectionsReverse Polarity / Overheat
Sub-System Rail
12V to 48V Step-Up High-Current Boost Converter
- Power DensityUp to 960W Peak Out
- Low-End CurrentUp to 20A Continuous @ 48V
- EnclosureAnodized Extruded Aluminum
- Ripple & Noise< 100mVp-p Full Load
Telecom Grade
36V-75V to 12V Telecom-Grade Isolated Converter
- Standard Range36V, 48V, 60V Central Bus
- Stabilized Output12V DC Regulated ±1.5%
- Operating Temp-40°C to +85°C Industrial
- CertificationCE, RoHS, ISO 9001 Audited
Procurement Intelligence
Emerging Procurement Trends in Switch-Mode Systems
Strategic analysis for engineering directors, tier-1 system integrators, and international procurement managers sourcing modular DC power conversion architectures.
Wide-Bandgap Semiconductor Integration
Global procurement teams are shifting away from legacy silicon MOSFETs toward Gallium Nitride (GaN) and Silicon Carbide (SiC) topologies. This shift enables switching frequencies exceeding 300kHz, shrinking magnetics and chassis footprints by 42% while driving peak efficiencies above 97%.
Digital Control & Telemetry Protocols
Analog-only modules are increasingly being replaced by hardware featuring digital control loops and serial communications. Standardized RS485 Modbus, CANOpen, and PMBus integration provide real-time reporting on output current, thermal conditions, and operating efficiency to host controllers.
Harsh Environment Vacuum Encapsulation
Accelerating demand across off-highway utility vehicles, marine electrification, and outdoor solar equipment requires durable protection against thermal shock and moisture ingress. Thermally conductive polyurethane or epoxy vacuum potting ensures IP67/IP68 ratings alongside structural resistance to continuous vibration.
Consolidated Battery-to-Battery (B2B) Architectures
Fleet operators are migrating toward universal input charging topologies. By integrating buck, boost, and CC/CV profile regulation into a single unit, fleet builders can safely charge auxiliary 12V, 24V, 36V, or 48V LiFePO4 banks directly from smart alternators without common-ground interference.
Supply Chain Resiliency & Modular Certifications
Procurement teams prioritize manufacturers maintaining dual-line SMT automation, robust component second-sourcing, and pre-certified CE/RoHS platforms under ISO 9001 governance. This helps insulate assembly operations against single-point supply chain bottlenecks.
Engineering Insights
Topological Evolution in Switch-Mode Topologies
A comparative structural overview of modern high-power switch-mode DC architectures deployed in demanding field conditions.
Non-Isolated Synchronous Buck Conversion
Synchronous step-down conversion uses high-performance low-RDS(on) FETs instead of freewheeling Schottky diodes to cut conductive losses. These units deliver up to 100A continuous output for transforming 24V commercial vehicle or 48V-72V industrial traction battery lines down to clean 12V auxiliary power with minimal thermal dissipation.
Four-Switch Seamless Non-Inverting Buck-Boost
Where input voltages fluctuate unpredictably across the target regulation rail—such as starter battery cranking drop-outs down to 8V or alternator field dumps reaching 36V—our four-switch synchronous buck-boost topology dynamically shifts operating modes. This maintains stable line regulation without output brown-out disruptions.
Galvanic Isolation & Common-Mode Attenuation
In telecommunication infrastructure and mixed-chassis high-voltage EV battery platforms, isolating grounds is essential to prevent ground loops and protect low-voltage control systems. Our transformer-isolated converters offer up to 1500V DC breakdown isolation to safeguard precision sensors and data networks.
Factory Heritage & Quality Control
Shenzhen Eltrum Electronic: Direct Manufacturer Capabilities
Founded in 2015 in Shenzhen's manufacturing corridor, Shenzhen Eltrum Electronic Co., Ltd. produces adjustable power conversion modules, DC-DC stabilizers, and multi-chemistry LiFePO4 battery chargers. Our facility operates under an ISO 9001 certified quality management system with CE and RoHS compliance across our product lines.
Our production environment uses automated surface mount (SMT) pick-and-place lines, automated optical inspection (AOI), proprietary transformer winding, and vacuum silicone potting equipment. Every production unit completes extended environmental burn-in under dynamic full-load stress to ensure long-term field reliability.
We work directly with engineering procurement teams, supporting standard catalog orders from low MOQs (from 5 units for rapid sample prototyping) up to full-scale OEM/ODM projects requiring custom voltage thresholds, unique enclosures, and integrated communication buses.
Engineering Support FAQ
Frequently Addressed Procurement Inquiries
Detailed technical, compliance, and commercial specifications for international procurement specialists and systems integration engineers.
What is the standard production MOQ, and do you support engineering sample orders?
Our standard catalog converters and battery chargers maintain a minimum order quantity (MOQ) of just 5 units. This allows your engineering teams to conduct bench qualification, thermal profiling, and system-level validation before placing production volume orders. High-power units (1000W–1500W) support sample orders from 1 to 2 units, while specialized isolated telecom boards typically start at 50 units.
When does a system architecture require buck-boost over standard buck conversion?
A standard buck (step-down) converter functions effectively only when the minimum input voltage remains comfortably above the target output voltage by a required dropout margin (typically +2V to +3V). A buck-boost architecture is essential whenever input voltage fluctuates both below and above the desired output rail. For example, in 12V battery installations where source voltage sags to 9V during engine cranking and rises to 14.6V during active alternator charging, a buck-boost converter ensures your load receives a constant 12.0V or 24.0V supply without interruption.
How do Eltrum battery-to-battery chargers prevent vehicle alternator damage?
Directly connecting lithium iron phosphate (LiFePO4) house banks to a standard vehicle alternator can lead to alternator failure; lithium cells exhibit exceptionally low internal resistance, pulling currents that exceed the alternator's rated thermal capacity at low RPMs. Our DC-DC battery chargers act as active power-limiting buffers. They draw controlled current from the primary electrical system while providing a dedicated multi-stage (Constant Current / Constant Voltage / Float) charging curve tuned specifically to your lithium pack's Battery Management System (BMS).
What OEM and ODM custom engineering parameters can your factory accommodate?
Shenzhen Eltrum Electronic provides extensive OEM/ODM manufacturing. Customizable options include tailored input/output voltage levels (e.g., custom 13.8V, 28V, or 58.4V profiles), adjustable constant-current thresholds, application-specific thermal potting, custom wiring harnesses or heavy-duty screw terminals, private branding/labeling, and communication protocols such as RS485 Modbus or CANbus for real-time remote monitoring.
What safety certifications, environmental testing, and shipping terms apply to exports?
All converter and charger families are manufactured under our ISO 9001 certified quality management system, carrying full CE and RoHS compliance documentation. Our standard commercial terms are EXW or FOB Shenzhen, with payment flexible across T/T wire transfer and PayPal in USD or CNY. We ship worldwide via express air freight (DHL/FedEx/UPS), consolidated air cargo, or ocean freight for full-container volume orders.
Ready to Engineer or Scale Your Custom Power Solutions?
Connect directly with our engineering sales team in Shenzhen. Share your electrical specifications, input/output requirements, or target custom application, and our team will provide a tailored quote and datasheet.
Get a Quote