Uninterruptable Power Supply and Battery Charger for Tethered Drones

DRACO-UPS protects tethered UAS when a loss of power occurs by supplying energy stored in an auxiliary battery.  Under normal operation DRACO-UPS  keeps an auxiliary battery topped off with a built-in 250 watt charger. DRACO-UPS provides monitoring and state of charge information through RS232 and an optically isolated interface.


  • Tethered UAVs
  • Aerostats
  • Remotely Operated Vehicles
  • Submersibles
  • Telerobotics






Output Voltage48 VDC
Output Current100 Amps
Output Power4800 Watts
Peak Efficiency97%
DC InputHigh Voltage DC


InputM3.5 Stud (WURTH-7461094) HVDC
OutputM5 Stud (WURTH-7461383) 48VDC
CMOS Level RS232
CMOS Level Status
Opto-isolated Status


Size11.9 x 17.1 x 5.72 cm
Weight695 grams
Power4800 Watts (Output)

Optional Data Link

Transmission50 Mbps at 1000 ft. (Typical)
MediumTwisted Pair / Coax / Power line
Max Line Voltage1000 VDC ( 2500 VDC optional)
EthernetThree ports, 10/100Mbps


  • Fast fully switched design eliminates diode voltage drop and ORing issues
  • Integrated 250 watt 10 to 12s LiPo charger
  • Inrush limiting reduces sparking when connecting batteries
  • Control and monitoring through RS232 and optically isolated interfaces


 *Dimensions are in Inches

Related Products

The DRACO-XFMR is part of an ecosystem of products that help engineers and designers reduce the cost and complexity of their solutions by simplifying the problem of transmitting data and power to tethered platforms.





[panel panel_heading=”LYNX-OEM-3P” panel_text=”Weighing only 50 grams, the LYNX-OEM-3P seamlessly integrates our Digital LYNX Ethernet over power technology and a three port Ethernet switch into a single package.  LYNX is the robust connectivity solution for tethered aerostats, UAS, and submersibles. Simplify connectivity to payloads and autopilots by adding RS232 and/or H.264 video encoding through the on board expansion ports. LYNX eliminates the expense and hassle associated with fragile fiber optic tethers.” panel_color=”panel-default”/]

[panel panel_heading=”DRACO-XFMR” panel_text=”Fly more payload at a higher altitude with a vehicle-side, high-voltage DC-to-DC converter for tethered platforms. Our DRACO technology allows designers to use longer and lighter tethers than would be possible with traditional converters. With an industry leading energy density of 6.9 Watts per gram, you can focus on your mission, not your power budget. Multiple DRACO-XFMRs can be connected in parallel to provide scalable power for even the most demanding applications.” panel_color=”panel-default”/]