Key Takeaways
- VPT’s new FL X Series delivers 1 W – 5 kW output power with up to 90 % efficiency.
- Supports 28 V, 50 V, and 270 V bus architectures, making it suitable for a wide range of industrial platforms.
- Modular, pre-qualified design merges isolated DC-DC converters and EMI filters in a single enclosure, cutting integration time by 30-40 %.
- Rated for -40 °C to +85 °C operation, vibration-resistant construction, and IEC-61000-4-2 EMC compliance.
- Configurable multi-output options reduce bill-of-materials (BOM) and lower overall system risk.
Introduction: A New Benchmark for Mission-Critical Power
VPT, Inc. has introduced the FL X Series, a family of configurable DC-DC converters built to meet the stringent demands of aerospace, defense, rail, and heavy-industry applications. By marrying VPT’s proven isolated converter topology with integrated EMI filtering, the FL X platform offers a “plug-and-play” solution that shortens development cycles while maintaining the high reliability required for critical equipment.
Core Architecture and Design Philosophy
Integrated Converter-and-Filter Module
- Isolated DC-DC core: Utilizes VPT’s patented transformer-based isolation, delivering galvanic separation up to 5 kV.
- EMI filter: Embedded common-mode choke and X-capacitor network meet CISPR 32 Class B limits without the need for external filtering stages.
Rugged Enclosure
- Housing: 7075-T6 aluminum chassis with a IP66 rating, protecting against dust and water jets.
- Thermal management: Forced-air and optional liquid-cooling plates sustain performance at +85 °C ambient.
Performance Spectrum
| Spec | Low-Power Variant | Mid-Power Variant | High-Power Variant |
|---|---|---|---|
| Output Power | 1 W – 250 W | 251 W – 2 kW | 2 001 W – 5 kW |
| Input Bus Voltage | 28 V, 50 V, 270 V | 28 V, 50 V, 270 V | 28 V, 50 V, 270 V |
| Efficiency (typ.) | 85 % – 88 % | 87 % – 90 % | 88 % – 90 % |
| Number of Outputs | 1-4 (configurable) | 2-6 (configurable) | 4-12 (configurable) |
| Operating Temp. | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Compliance | IEC-61000-4-2, IEC-60730-1 | IEC-61000-4-2, IEC-60730-1 | IEC-61000-4-2, IEC-60730-1 |
All variants meet UL 60950-1 and MIL-STD-461F electromagnetic compatibility standards.
Engineering Benefits
Accelerated System Integration
The modular nature allows designers to select a single FL X unit that replaces multiple discrete converters and filters. VPT reports a 30 % reduction in wiring complexity and a 40 % cut in validation time because the assembly arrives pre-qualified for EMI and isolation.
Reduced Bill-of-Materials (BOM)
By consolidating functions, a typical 3-kW power subsystem can be built with one FL X chassis instead of three separate converters and two external filters, saving roughly $150-$250 per unit in component costs.
Scalability Across Platforms
Because the same chassis supports three bus voltages, manufacturers can reuse a single design across product families—e.g., a 28 V rail-car controller and a 270 V aerospace avionics module—streamlining inventory and tooling.
Application Highlights
- Aerospace flight control computers requiring isolated 270 V rails with strict weight limits.
- Rail traction inverters that operate from a 28 V auxiliary bus but need multiple 12 V and 5 V outputs.
- Industrial CNC turning centers where high-current spindle drives (up to 5 kW) coexist with low-power sensor networks.
Comparison with Conventional DC-DC Solutions
| Feature | Traditional Discrete Converters | FL X Series (Integrated) |
|---|---|---|
| Integration Time | 6-12 weeks (multiple parts) | 2-4 weeks (single qualified unit) |
| EMI Filtering | Separate components, added layout risk | Built-in, validated to standards |
| Isolation Rating | Up to 2 kV (per part) | Up to 5 kV (system-wide) |
| Space Savings | Larger PCB footprint | Up to 45 % reduction in board area |
| Maintenance | Multiple failure points | Single enclosure, easier diagnostics |
Bottom Line
VPT’s FL X Series sets a new standard for configurable DC-DC conversion in mission-critical environments. Its wide power range, high efficiency, and integrated EMI protection enable engineers to compress development schedules, lower BOM costs, and meet rigorous reliability criteria without sacrificing performance. For OEMs seeking a versatile, rugged power platform that can adapt to 28 V, 50 V, or 270 V buses, the FL X series offers a compelling, future-proof solution.
