Smart 36V Lithium Charger 12V to 43.8V 13A
- Nominal Input: 12V DC (9–16V range)
- Charge Target: 43.8V CC/CV (12S LiFePO4)
- Current Output: 13A Controllable
- Ingress Rating: IP67 Fully Sealed
500+
Standard Production Topologies
130+
Export Destination Countries
96.8%
Peak Conversion Efficiency
5 pcs
Engineering Prototype MOQ
Precision Catalog
Featured AC-DC Chargers & Precision DC-DC Converters
Engineered in our Shenzhen manufacturing complex, these high-reliability platforms feature vacuum encapsulation, synchronous rectification, and custom CC/CV curves to satisfy rigorous OEM operating constraints.
600W AC-DC Waterproof LiFePO4 Charger
- Grid Input: 90–264V AC Universal
- Profiles: 14.6V / 29.2V / 58.4V
- Conversion Eff: > 94% @ Full Load
- Protections: OVP, OCP, OTP, Reverse Polarity
600W Marine & EV Multi-Bank Charger
- Target Chemistries: LiFePO4, LMO, Lead-Acid
- Volt Regimes: 12V / 24V / 36V / 48V
- Housing: Die-Cast Fin Heatsink
- Vibration Index: MIL-STD-810G Class
300W Marine Compact AC-DC Charger
- AC Interfaces: US / EU / UK / AU Plugs
- DC Output: 14.6V–58.4V Custom
- Internal Encapsulation: Thermal Silicone Potting
- Acoustics: 0dB Fanless Passive Dissipation
1500W Buck-Boost Converter w/ RS485
- Ultra-Wide Input: 10V–60V DC Dynamic
- Regulated Output: 12V / 24V / 28V / 48V
- Telemetry: RS485 Modbus RTU
- Peak Current: Up to 60A Continuous
400W Dual-Battery RV DC-DC Charger
- Alternator Input: 10V–36V DC Sag Compensated
- House Output: 14.6V / 29.2V (LiFePO4)
- Euro 6 Ready: Smart Alternator Compatible
- Sealing: Full Polyurethane Encapsulation
10–44V to 12V 60A Synchronous Stabilizer
- Continuous Amps: 60A Real DC Current
- Regulated Output: 12.0V ± 1.0% Precision
- Efficiency: 96.4% Synchronous FET
- Chassis: Extruded Aluminum Enclosure
8–40V to 13.8V 30A DC Stabilizer
- Vehicle Bus: 8V–40V DC (12V/24V Auto)
- Comms Output: 13.8V Base Station Rail
- Max Output: 414W Continuous
- Noise Filter: Low Ripple < 50mVp-p
Industrial Whitepaper
State-of-the-Art Power Conversion Architectures
In critical industrial, automotive, and off-grid utility sectors, switching power topologies must conquer harmonic distortion, wide input voltage swings, and extreme thermal cyclic fatigue. Below is an engineering overview of our core circuit paradigms.
Synchronous Rectification & Gallium Nitride (GaN) Switching
Conventional diode-based secondary rectifiers inflict continuous V_forward × I_out conduction losses that degrade thermal management in sealed IP67 enclosures. Eltrum SMPS engineering replaces conventional Schottky diodes with low R_DS(on) N-channel MOSFETs driven by high-speed predictive digital controllers. By reducing conduction drop from 0.55V to under 0.04V, system operating temperatures decline by up to 28°C under continuous 50A workloads.
LLC Resonant Half-Bridge vs Phase-Shift Full-Bridge (PSFB)
For high-voltage AC-DC charging modules (600W to 1500W), our platforms implement Zero Voltage Switching (ZVS) resonant tanks. LLC topologies eliminate turn-on switching losses across primary switches while maintaining gentle diode recovery currents. This yields flat efficiency curves exceeding 95.5% from 35% load up to full rated capacity.
- Near-Zero Electromagnetic Noise: Zero-voltage transitions reduce high-frequency dV/dt slew rates, drastically diminishing conducted and radiated emissions to pass CISPR 32 Class B without bulky inductive EMI filter stages.
- Thermal Sinking via Direct Substrate Bonding: Power stages utilize heavy copper DBC (Direct Bonded Copper) and aluminum IMS (Insulated Metal Substrates) ensuring junction-to-case thermal impedance (Rθjc) remains beneath 0.45 °C/W.
- Dynamic Active Clamp Protection: High-energy transient voltage surge suppressors (TVS) coupled with hardware-level clamp circuits mitigate automotive load dump surges conforming to ISO 7637-2 Test Pulse 5a/5b.
| Circuit Topology | Typical Input Band | Isolation Level | Peak Efficiency | Primary Industrial OEM Use-Case |
|---|---|---|---|---|
| Non-Isolated Synchronous Buck | 24V, 48V, 72V, 80V DC | Common Ground | 96.8% | Commercial Vehicle 24V→12V auxiliary, AGV warehouse robots, LED telemetry. |
| Four-Switch Non-Inverting Buck-Boost | 8V to 60V Wide DC Range | Common Ground | 95.4% | Automotive engine cranking voltage stabilizer (sags to 8V, charges to 14.6V). |
| Push-Pull / Forward Transformer Isolated | 18–36V, 36–75V, 18–90V | 1500V–3000V AC Galvanic | 92.5% | Positive-ground telecom racks, marine navigation bus isolation, medical carts. |
| Interleaved LLC Resonant AC-DC | 90V to 264V AC Mains | 3750V AC Reinforced | 95.8% | LiFePO4 onboard marine chargers, commercial e-trike charging, outdoor storage. |
Market & Engineering Intelligence
Strategic Procurement & Technology Trends: 2025–2030
Global OEM system integrators, automotive tier-1 suppliers, and grid engineers face stringent thermal, efficiency, and communication demands. The following engineering trends govern next-generation power supply sourcing.
1. Wide-Bandgap GaN & SiC Dominance
The transition away from legacy silicon MOSFETs toward Silicon Carbide (SiC) and Gallium Nitride (GaN) switching components allows switching frequencies to climb above 250kHz without thermal penalties. For OEM buyers, this slashes magnetics volume by over 40%, yielding converter power densities surpassing 35W per cubic inch.
2. Software-Defined Charging & RS485
Hardware-locked constant voltage rails are obsolete. Modern fleet and storage systems mandate on-the-fly firmware modulation. Integrating RS485 (Modbus RTU), CANopen, and PMBus allows host battery management systems (BMS) to dynamically command charge voltage ceilings, taper currents, and broadcast diagnostic junction temperatures in real time.
3. Environmental Potting & Submersion Integrity
Field returns in mobile machinery and marine equipment correlate with moisture ingress, salt fog oxidation, and harmonic structural vibration. The industry baseline has pivoted decisively toward complete vacuum epoxy or two-part thermally conductive silicone potting, attaining permanent IP67/IP68 hermetic containment with zero air void pockets.
4. Supply Chain De-Risking & Dual Sourcing
Supply chain shocks have altered global OEM procurement parameters. Engineering procurement executives reject single-source controller topologies. Our R&D team designs drop-in pin-compatible PCB footprints accommodating alternative high-power driver ICs, protecting delivery commitments against regional wafer fabrication bottlenecks.
5. Total Cost of Ownership (TCO) & MTBF
Forward-thinking buyers evaluate Levelized Cost of Power Conversion rather than nominal unit purchase price. Elevating mean time between failures (MTBF) past 150,000 operational hours via 105°C long-life Japanese electrolytic capacitors, solid polymer filters, and derated magnetics eliminates costly warranty claims and field maintenance dispatches.
6. Universal Multi-Chemistry Adaptability
Fleet electrification requires hardware agile enough to bridge standard Lead-Acid/AGM starter batteries, Lithium Iron Phosphate (LiFePO4) house storage, and Ternary Lithium (NMC) traction packs. Programmable or dip-switch selectable voltage regimes streamline inventory complexity for distributors serving diverse markets.
Precision Manufacturing
Shenzhen Eltrum Electronic Co., Ltd.
Founded in 2015 in the global electronics manufacturing epicenter of Shenzhen, China, Shenzhen Eltrum Electronic Co., Ltd. has grown to operate specialized manufacturing facilities spanning up to 3,000 square meters. Our enterprise is onsite-verified by third-party global inspection authorities, adhering strictly to ISO 9001 quality management standards.
We engineer high-current non-isolated buck, boost, and buck-boost modules alongside transformer-isolated converters and high-power AC-DC LiFePO4 battery chargers. From rapid prototyping (low MOQ of 5 units) to automated high-volume production for international tier-1 distributors in North America, Western Europe, Japan, and Australia, we deliver custom-engineered power solutions on schedule.
100%
Burn-In Testing
ISO
9001 Certified
CE/RoHS
Full Compliance
OEM/ODM
Buyer Labeling
Our End-to-End Quality Engineering Lifecycle
Every production batch follows an auditable, six-stage verification gateway before port dispatch.
01. Schematic & Thermal Simulation
Finite element thermal modeling and circuit simulation via SPICE to validate component derating factors under worst-case boundary conditions.
02. SMT High-Speed Placement
Automated optical inspection (AOI) verified surface mounting with lead-free nitrogen reflow soldering ensuring void-free solder joints.
03. Vacuum Enclosure Potting
Two-component thermally conductive polyurethane or silicone potting injected in vacuum chambers to completely eliminate micro-air bubble cavities.
04. Hi-Pot Isolation Stress Testing
100% routine dielectric breakdown validation at 1,500V to 3,750V AC between input, output, and aluminum chassis ground rails.
05. 4-Hour Thermal Full-Load Burn-In
Every unit undergoes elevated ambient temperature (50°C) active burn-in cycles at 100% rated capacity to weed out infant component mortality.
06. ATE Final Parametric Verification
Automated Test Equipment measures line/load regulation, ripple voltage, soft-start timing, and short-circuit foldback response prior to packaging.
Procurement Intelligence
Frequently Asked Questions for Sourcing Teams
Direct answers to the most common engineering, commercial, and quality assurance inquiries presented by enterprise buyers and technical project directors.
What is the typical Minimum Order Quantity (MOQ) for prototypes and volume production?
For standard catalog models across buck, boost, isolated converter, and battery charger families, our sample validation MOQ begins at just 5 units. This enables engineering teams to validate bench prototypes and field trials without prohibitive upfront capital allocations. High-power units (1500W+) can be sampled from 1–2 units. Customized ODM runs (bespoke PCB dimensions, customized connector pigtails, or unique communication firmware) generally carry a volume production MOQ of 50 to 100 units depending on housing tooling requirements.
When should our engineers select an Isolated DC-DC Converter over a Non-Isolated model?
Galvanic isolation (using internal high-frequency planar or toroidal transformers) is strictly required when the input electrical system and load ground must not share a conductive return path. Key scenarios include: (1) Telecommunications operating on negative 48V standards; (2) Industrial Forklifts & AGVs where battery traction motors introduce massive inductive ground spikes that could destroy sensitive microcontrollers; (3) Marine Hull Protection to prevent galvanic hull electrolysis corrosion; and (4) Ground Loop Elimination in sensitive audio, radio, and telemetry instrumentation. If common grounds are permissible and input is consistently higher than output, non-isolated buck regulators provide higher efficiency (96%+) in smaller physical footprints.
How do your battery chargers prevent overcharging or thermal runaway in LiFePO4 packs?
Our chargers utilize microcontroller-governed Constant Current / Constant Voltage (CC/CV) multi-stage charge algorithms calibrated specifically to the electrochemistry of Lithium Iron Phosphate cells. Unlike legacy lead-acid trickle float chargers, which degrade lithium electrolyte, Eltrum chargers maintain precision constant current during bulk charge, transition smoothly into constant absorption voltage (typically 14.6V for 4S, 29.2V for 8S, or 58.4V for 16S packs), and terminate or drop current to zero when cells are equalized. Integrated safety circuits include over-voltage auto-cutoff, short-circuit current collapse, reverse-polarity MOSFET latches, and internal NTC thermistors that dial back current if enclosure temperatures exceed 75°C.
Can Eltrum customize input/output voltage thresholds, harness plugs, and private labels?
Yes. Customization forms the core of our OEM/ODM export business. We routinely manufacture non-standard voltages (such as 13.8V, 19V, 28V, 36V, 54V, and 72V rails), wide-range DC inputs (such as 8–40V, 10–60V, or 18–90V), tailored wire gauge lengths, and industrial connector terminations (Anderson Powerpole, Deutsch DT, waterproof aviation circular connectors, ring terminals, or automotive cigarette adapters). Laser engraving of buyer brand logos, model designations, and serialized QR codes is standard practice on all OEM volume shipments.
What international testing, certification, and environmental standards are supported?
Our systems are manufactured in compliance with international export mandates. Standard series carry the European Union CE mark (Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU) and RoHS Directive 2011/65/EU / (EU) 2015/863 hazardous substance restrictions. Manufacturing operations conform strictly to ISO 9001 quality management guidelines. Models destined for North American deployment can be engineered to meet UL 1012, UL 62368-1, and FCC Part 15 Class B criteria upon project agreement.
How does the potting compound behave in extreme cold (-40°C) and tropical humidity?
We utilize high-grade industrial-grade, two-component thermally conductive polyurethane or silicone potting resins. These compounds maintain flexible elastomeric properties across thermal ranges from -40°C to +105°C, eliminating micro-cracking and solder-joint shear caused by differential thermal expansion (CTE mismatch). The fully cured potting forms an airtight barrier resistant to salt spray, hydraulic fluids, diesel fumes, high humidity, and prolonged water immersion conforming to IP67/IP68 ingress ratings.
What are your accepted international trade payment methods and logistics delivery terms?
We support standard international commercial terms including Telegraphic Transfer (T/T), PayPal (ideal for fast prototyping batches), and secure Escrow transactions in USD or CNY. Commercial shipment arrangements include EXW (Shenzhen factory), FOB (Shenzhen or Hong Kong ports), CIF, or DDP air express (via DHL, FedEx, UPS) for time-critical engineering sample deployments.
Launch Your Custom Power Conversion Project
Whether you require standard 5-piece evaluation samples, drop-in replacements for obsolete industrial modules, or a bespoke multi-rail power platform engineered from the ground up, our Shenzhen design engineering group provides rapid technical turnaround.