Smart 36V Lithium Battery Charger DC 12V to DC 43.8V 13A
- Input Voltage RangeDC 10V – 36V
- Output Charging43.8V CC/CV 13A
- Ingress ProtectionIP67 Fully Potted
- Primary FitEV, Marine & RV Aux
Enterprise Sourcing
Precision OEM DC-DC Power Modules & Chargers
Engineered for high vibrational durability, wide thermal dissipation thresholds (-40°C to +85°C), and uncompromising step-down, step-up, and isolated regulation.
1500W High-Power Buck-Boost Converter (RS485)
- Input RangeDC 10V – 60V Wide
- Regulated Output12V / 24V / 48V Adj.
- TelemetryRS485 Modbus RTU
- Peak Efficiency>95.5% Synchronous
Isolated Telecom DC-DC Converter 18–75V to 24V 5A
- Dielectric Isolation1500V DC Min.
- Nominal Output24V DC / 120W
- Ground LoopsCompletely Decoupled
- Noise SuppressionLow Ripple <50mVp-p
24V to 12V 85A–100A Commercial Fleet Step-Down
- Bus ArchitectureCommercial 24V to 12V
- Continuous Rating100A (1200 Watts)
- Chassis DesignDie-cast Extruded Alum
- CertificationsCE, RoHS Certified
Isolated 18V–90V Ultra-Wide Input to 12V 10A Module
- Ultra-Wide Swing18V to 90V Continuous
- Galvanic BarrierSolid Dielectric Potting
- Output Rails12V DC Regulated (120W)
- Use CaseForklifts, AGVs, Light Rail
400W Dual-Battery DC-DC Smart Charger
- Alternator Input10V – 36V Smart Input
- Charge Profiles14.6V / 29.2V LiFePO4
- Thermal SensingIntegrated Derating
- Waterproof GradeIP68 Hermetic Seal
12V to 48V 20A Industrial Step-Up Boost Converter
- Nominal InputDC 12V (9V–20V Window)
- Boosted Output48V DC Stable (960W)
- Thermal CoreInternal Silicon Grease
- Application48V BLDC Motors, Solar
30V–90V Traction-Pack to 24V 20A Step-Down Module
- Input Voltage30V–90V (48V/60V/72V)
- Output Current24V @ 20A Continuous
- Safety SystemOVP, OCP, OTP & SCP
- Target PlatformE-Bikes, Golf Carts & AGVs
Technical Insight & Engineering
The Strategic Architecture of Custom OEM DC-DC Power Conversion
Navigating the balance between electromagnetic compatibility (EMC), thermal equilibrium, and dynamic transient load recovery in rugged DC topologies.
Understanding Topology Trade-offs: Buck, Boost, Buck-Boost, and Galvanic Isolation
In modern power electronic architecture, selecting an OEM power conversion topology demands deep scrutiny of dynamic supply fluctuations. A standard Buck Converter (Step-Down) offers peak electrical efficiency (often exceeding 96%) when the source rail reliably maintains head-room voltage above output. However, in vehicular and battery-backup installations, nominal 12V or 24V lead-acid and lithium-iron-phosphate (LiFePO4) chemistries sag drastically under cranking currents—dropping down to 8.5V—and surge upwards to 29V+ during alternator absorption phases. In these environments, selecting an inappropriate topology causes intermittent load reset, thermal runaways, or catastrophic over-voltage feedthrough.
Engineering Rule of Thumb: When input rails swing across the regulated output profile (e.g., 9V to 16V battery swing powering a stabilized 12V or 13.8V rail), an OEM must implement a Non-Inverting Synchronous Buck-Boost Topology with four-switch MOSFET bridge orchestration to sustain uninterrupted voltage clamping.
Conversely, for high-potential traction systems (48V, 72V, 96V in electric automated guided vehicles and telecom central offices), ground differential elimination is mandatory. Galvanic Isolated Converters leverage planar magnetic transformers to completely detach the primary return path from the secondary chassis ground. This suppresses common-mode noise, mitigates hazardous high-voltage leakage, and neutralizes destructive ground loops across distributed sensor and CAN/RS485 transceiver networks.
| Conversion Architecture | Standard Input Range | Target Output Voltage | Isolation Class | Typical System Deployment |
|---|---|---|---|---|
| Synchronous Buck | 20V – 36V / 30V – 90V | 5V, 12V, 13.8V, 24V | Non-Isolated (Common GND) | Heavy Truck 24V Fleet Auxiliary, Fleet Telematics, In-Cab Display |
| Synchronous Boost | 9V – 20V / 18V – 32V | 24V, 28V, 36V, 48V | Non-Isolated (Common GND) | 12V Battery to 48V Solar Storage, Stepper Motors, High-Lumen LED |
| 4-Switch Buck-Boost | 8V – 40V / 10V – 60V | 12V, 19V, 24V, 28V | Non-Isolated Dynamic Bridge | Automotive Cold-Crank Stabilizers, Marine Navigation Electronics |
| Planar Isolated Forward | 18V – 36V / 36V – 75V / 18V – 90V | 5V, 12V, 24V | Galvanic 1500VDC Dielectric | Base Station Telecom, AGVs, Medical Carts, Forklift Instrumentation |
Enterprise OEM/ODM Customization Capabilities
Operating from our dedicated 3,000m² manufacturing facility in Shenzhen, China, Shenzhen Eltrum Electronic Co., Ltd. (founded in 2015) bridges the critical gap between conceptual electrical engineering and volume industrial production. Our state-of-the-art SMT pick-and-place lines, automatic selective wave soldering, and computer-controlled potting systems yield over 500 validated DC-DC converter models trusted across 130 countries worldwide.
Custom CC/CV Charging Curves
RS485 Modbus Telemetry
Hermetic IP67/IP68 Silicone Potting
Custom Connectors & Wiring Looms
Industry Roadmap
Emerging Procurement Trends & Next-Gen Power Conversion
Strategic analysis of market demands shaping DC-DC module architectures through 2030.
1. Transition to Gallium Nitride (GaN) & SiC Semiconductors
System designers are rapidly phasing out silicon planar MOSFETs in favor of wide-bandgap (WBG) materials. Silicon Carbide (SiC) and Gallium Nitride (GaN) switching stages enable frequencies exceeding 500 kHz, drastically reducing inductive magnetic core sizing while elevating conversion efficiencies beyond 97%. This enables OEMs to pack 1500W modules into form factors previously limited to 600W.
2. Telemetric Intelligence & Programmable Bus Protocols
Modern industrial procurement demands more than static power delivery. Fleet managers require bidirectional communication channels. Next-generation DC-DC converters integrate microprocessor-controlled CAN-bus, LIN-bus, and RS485 communication protocols, broadcasting real-time module temperatures, output ripple statistics, cumulative runtime data, and dynamically variable current-limit thresholds.
3. Stringent Ingress & Environmental Resilience (IP68)
With the exponential growth of electrification in marine, off-grid expedition RVs, agriculture, and construction equipment, vulnerable fan-cooled vented power supplies are being obsolete. The procurement trajectory is uniformly pivoting to fanless, thermally optimized aluminum alloy enclosures encapsulated in flame-retardant epoxy or thermally conductive silicone gel (UL94-V0 rated).
Verified Authority
The Eltrum Manufacturing Advantage
Full lifecycle quality management executing ISO 9001 protocols, third-party onsite verifications, and 100% full-load thermal burn-in testing.
Traceability
ISO 9001:2015 Audited Facility
Every production batch undergoes strict incoming material qualification (IQC), automated optical inspection (AOI), in-circuit testing (ICT), and outgoing quality control (OQC). Raw materials are sourced exclusively from Tier-1 semiconductor and passive component vendors.
Thermal Verification
100% Thermal Load Burn-In
Unlike spot-sampling manufacturers, 100% of Eltrum power modules and chargers undergo continuous thermal burn-in screening under full rated electrical loads inside specialized elevated-temperature chambers before sealing and release.
Custom Engineering
Rapid Agile Customization
We provide rapid engineering iteration. From tailor-made PCB dimensions and custom IP68 terminal pigtails to proprietary multi-stage LiFePO4 / NMC charging algorithms, our engineering team delivers functional B2B evaluation samples from 5 units within record turnaround times.
Procurement Knowledge Base
Frequently Asked Questions on OEM DC-DC Sourcing
Direct technical answers to common integration, testing, logistics, and design-in inquiries.
What is the typical Minimum Order Quantity (MOQ) for custom vs. standard OEM DC-DC modules?
For our extensive catalog of over 500 standard step-down, boost, buck-boost, and isolated modules, our baseline MOQ begins at just 5 units. This enables hardware development engineers to validate performance on test benches and in test vehicles prior to full capital commitment. For specialized custom OEM/ODM requests (such as proprietary housing extrusion, non-standard rail voltages, or custom firmware charging profiles), initial engineering validation batches typically require 50 to 100 units depending on mechanical complexity.
How do I determine whether my application requires an isolated or non-isolated DC-DC converter?
A non-isolated converter shares an internal electrical common ground between the input negative and output negative. This topology is smaller, lighter, and more electrically efficient, making it ideal for automotive, truck, and RV accessories where all equipment shares a common chassis ground. You must select an Isolated Converter if: (1) your input voltage is dangerously high (e.g., 48V–90V in telecom or traction batteries) requiring human safety protection; (2) positive-ground infrastructure exists (standard in telecommunications); or (3) sensitive radio frequency, CAN-bus communications, or medical devices experience electrical noise and ground loop disruption.
Why shouldn't I connect a lithium LiFePO4 battery bank directly to a vehicle alternator?
Lithium iron phosphate batteries exhibit extraordinarily low internal impedance. When heavily discharged, a LiFePO4 pack attempts to draw maximum available current from the alternator without restriction. At engine idle, when cooling fan airflow is minimal, this uncontrolled draw causes alternator stator overheating and burn-out. Furthermore, standard automotive voltage regulators do not provide the dedicated Constant-Current / Constant-Voltage (CC/CV) absorption algorithms necessary to balance lithium cells without triggering BMS high-voltage shut-off. A dedicated Eltrum DC-DC battery charger regulates alternator input safely and delivers precise cell-balanced charging profiles.
How should we size converters for high inductive and motor inrush loads?
Inductive loads such as electric actuators, compressors, blowers, and DC motors exhibit start-up inrush current spikes ranging from 3× to 6× their steady-state rated current. If a DC-DC converter is sized strictly for continuous wattage, these sudden sub-millisecond current surges will trigger internal Over-Current Protection (OCP) or under-voltage latching. We advise applying a minimum derating multiplier of 1.3× to 1.5× for general loads, and selecting models with soft-start capability or higher peak headroom limits when inductive equipment is driven.
What international electrical compliance and regulatory certificates do your modules carry?
Our modules are engineered and manufactured in strict conformity with CE (Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU) and RoHS environmental directives. Our operational facilities operate under an audited ISO 9001:2015 Quality Management System. Specific certificate documentation, EMC test lab reports, and REACH declarations can be provided immediately upon technical inquiry.
What commercial payment terms, currencies, and incoterms are supported for export?
We support wire transfer (T/T), PayPal, and Escrow in major global trading currencies including USD and CNY. Standard international logistics terms include EXW (Shenzhen) and FOB (Shenzhen/Hong Kong). We also work closely with customer-designated freight forwarders or provide integrated express courier (DHL, FedEx, UPS) and ocean consolidation solutions.
Accelerate Your Power Engineering Timeline
Consult directly with our Shenzhen power electronics engineering team. Whether you need custom thermal dimensions, proprietary bus voltages, or standard evaluation units shipped within 48 hours, our technical sales department is ready to assist your B2B sourcing requirements.