By Robert Pecaric Jr., President & CEO, Aerospace Devices Inc. | 2024 Aerospace & Defense Reviews USB Charging Company of the Year
Three years ago, a director at a major OEM called me with a problem. Their new business jet was failing EMI testing because of “minor” USB charging installations. The chargers were consumer-grade units with aviation stickers. That conversation changed how I talk about what we build. USB power solutions for aircraft aren’t accessories. They’re electromagnetic devices installed in electrically sensitive environments where failure isn’t an option.
I’ve watched this industry mature from novelty to necessity. Here’s how modern aerospace charging solutions actually earn their place in certified aircraft, and why the testing matters more than the port itself.
What “Aerospace Testing and Certification of USB Devices” Actually Means
When engineers say aerospace testing and certification of USB devices, they’re referring to a specific gauntlet. RTCA DO-160G defines twenty-six environmental test categories. Temperature cycling from -55°C to +70°C. Altitude decompression to 70,000 feet equivalent. Vibration profiles that simulate decades of flight hours in weeks. Salt spray, humidity, fungal resistance, and electromagnetic susceptibility testing that verifies your charger won’t interfere with navigation radios or fail when they’re needed most.
We don’t design chargers and then “get them certified.” We design for certification from the first schematic. Every trace width, every component placement, every grounding strategy anticipates the test requirements. Our Wichita facility runs pre-qualification testing that mirrors DO-160G parameters before we ever ship to formal labs. This approach catches issues early, when they’re still engineering changes rather than production disasters.
Designing Cockpit USB Power Solutions for Harsh Aviation Environments
A cockpit USB power solution faces constraints that consumer designers never consider. Space is measured in millimeters behind panels already crowded with avionics. Heat dissipation happens in ambient temperatures that would throttle a laptop. And the electrical environment includes 400Hz power, voltage transients during engine start, and RF fields from communication equipment.
Our SkyDock Pro series addresses this through synchronous rectification, achieving 90-93% efficiency, meaning less waste heat in confined spaces. The aluminum housing isn’t just rugged; it’s a thermal management solution. CNC-machined from 6061-T6 aerospace alloy, it conducts heat away from internal components while providing the structural integrity for panel-mount installation.
The connector itself matters too. USB-C is standard now, but not all implementations handle the insertion cycles and environmental exposure of daily flight operations. We specify connectors rated for thousands of mating cycles with positive retention mechanisms that resist vibration loosening.
Why Voltage Range Matters More Than Output Rating
Aircraft electrical systems aren’t stable 12V or 24V sources. They’re nominal ratings with significant variation. A 14V system sees 10V during engine cranking and 16V during alternator load dump. A 28V system experiences similar swings. USB power solutions for aircraft must regulate consistently across this entire input range while maintaining USB Power Delivery negotiation with connected devices.
Our wide-input designs handle 10V to 36V transients without interrupting the output. This isn’t feature-list marketing; it’s survival capability. We’ve tested units through DO-160G Section 16 power input variations, observing them maintain specification when voltage sags or spikes beyond nominal ranges. The pilot plugging in an EFB doesn’t know this is happening. They just know their device charges reliably, flight after flight.
EMI Shielding and RF Compliance in Aerospace USB Devices
DO-160G Section 21 addresses radio frequency emissions and susceptibility. Your cockpit USB power solution must neither emit interference that affects communication or navigation systems nor fail when exposed to intentional transmitters such as weather radar or TCAS equipment.
We achieve this through multiple strategies. Forced-PWM switching at controlled frequencies with proper filtering. CNC-machined aluminum housings that provide 60dB attenuation at 100MHz when properly grounded to the airframe. Shielded cables with 360-degree termination. Each element adds cost and complexity that consumer manufacturers skip—and that aviation applications require.
Certification Beyond DO-160G: The TSO Path
DO-160G environmental qualification is foundational. For permanent aircraft installation, FAA Technical Standard Order (TSO) C71 provides additional rigor. We’re actively pursuing this approval, which involves not just passing tests but demonstrating manufacturing process control, quality system compliance, and ongoing conformity.
This matters for aerospace testing and certification of USB devices because TSO authorization allows installation without additional equipment-specific approval in many aircraft. It streamlines the path from our Wichita factory to your panel, with documented traceability at every step.
Where Aerospace Charging Solutions Are Evolving
Looking forward, aerospace charging solutions are advancing in three areas we’re actively developing:
Intelligent power management is becoming essential as aircraft electrical systems grow more complex. Chargers that report status, enable remote monitoring, and integrate with aircraft bus management systems. This matters particularly for electric aircraft and platforms with strict power budgets.
Higher power density follows USB Power Delivery 3.1’s 240W capability – more power in the same physical envelope, achieved through advanced thermal design and higher-efficiency conversion topologies.
Modular sustainability addresses e-waste and regulatory compliance. Replaceable port modules rather than disposable units. Designs anticipating EU PED requirements and end-of-life recyclability.
American Manufacturing: Wichita’s Role in Certified Aviation Power Systems
I started this company understanding that aviation doesn’t forgive shortcuts. Every USB power solution for aircraft we ship carries that understanding— designed here, tested here, manufactured here. Our 2024 recognition from Aerospace & Defense Reviews confirmed what our customers tell us: when flight-critical power matters, specification compliance isn’t negotiable.
The OEM director who called me three years ago? We solved their EMI problem. Their aircraft is certified. And their pilots now have charging infrastructure that meets the same standards as their avionics, because it should.
Ready to specify certified power for your platform? Request technical specifications or speak with our Wichita engineering team.
FAQs
Q: What testing standards apply to USB power solutions for aircraft?
→ RTCA DO-160G provides the primary environmental and electromagnetic qualification framework for aerospace testing and certification of USB devices. Twenty-six test categories cover temperature, altitude, vibration, humidity, salt spray, and EMI. Additional FAA TSO C71 approval may apply for permanent installation applications.
Q: How does a cockpit USB power solution differ from consumer chargers?
→ Cockpit USB power solutions must survive voltage transients, extreme temperatures, vibration, and electromagnetic interference while fitting confined avionics spaces. They require 90%+ efficiency for thermal management, IP67 sealing for environmental protection, and DO-160G certification—specifications consumer chargers don’t address.
Q: Why does efficiency matter in aerospace charging solutions?
→ Higher efficiency (90-93% vs. 65-70% consumer standard) means less waste heat in confined avionics compartments, reduced cooling requirements, and longer component life. For aerospace charging solutions, this translates to reliability and reduced maintenance burden.
Q: What installation approval is required for aircraft USB chargers?
→ Requirements vary by aircraft certification basis and intended use. DO-160 G-qualified USB power solutions for aircraft are aligned with many applications. FAA TSO C71 authorization streamlines permanent installation. Consult your A&P or completion center for specific aircraft requirements, or contact our Wichita engineering team for technical documentation.
