The UPS25ER is an intelligent power switch/battery charger that is designed to work with a non-isolated power supply and a 9.6V, 8-cell, NiMH 1500mAhr or NiCd 1000mAhr battery pack to form an UPS. The UPS25 is designed to charge a battery from 7.5V to 11.5V. Starter kits are available with 1500 mAh NiMH or 1000 mAh NiCd battery pack equipped with a 10K NTC thermistor. A typical application gives a 30 minute backup at 20 Watts.
The UPS25 enters battery backup when the main input falls below 10V. While above 10V, it charges the battery. The UPS25 routes power to your power supply module from either the main input or from the backup battery. The UPS25 generates a software enabled interrupt when the main power fails.

  • Charges from 0C to +40C
  • -10 to +65C backup with NiCd
  • -20 to +65C backup with NiMH
  • Wide 10-40 VDC input range
  • Charger current limited to 1.2A
  • Battery output voltage +9.6V nominal
  • Adjustable backup voltage trip level
  • Charger modes: Fast charge, Top off charge, and Trickle charge
  • Battery temperature and voltage condition monitoring
  • Two charger status LEDs
  • Software controlled charger operation and diagnostics
  • Disconnects battery and power after shutdown
  • Fully PC/104 compliant
  • Optional rugged IDAN® enclosure system

RTD is a founder of the PC/104 Consortium and an ISO 9001 and AS9100 certified company. RTD designs its products to withstand -40 to +85 C operating temperatures and severe shock and vibrations which are indispensable for the most demanding industrial, aerospace, transport, and military applications. From low power to high-end performance, RTD's product offering is the broadest in the industry. RTD specializes in the research, design, and manufacturing of PC/104, PC/104-Plus, PCI-104, PCIe/104 and PCI/104-Express compliant modules and systems, addressing intelligent process control, data acquisition and processing, adaptive signal processing, video capture, telematics, wireless, fieldbus, and power supply technologies. RTD's rugged packaging and system solutions include the IDAN®, HiDAN®, HiDANplus®, and FieldPad® and are available in standard and custom designs. Add in drivers, developed software environments, and example programs, RTD provides a clear one-stop, fast development experience with long lasting support for the embedded customer. All of RTD's products are manufactured in the U.S.A. at our facility and have seen use on every continent, in many oceans, at various levels of our atmosphere, and in space. A State of the art Automated Surface Mount Assembly System using X-Ray technology for inspection of BGA components along with Humidity Controlled Environmental Chambers highlights the effort taken to ensure a quality product.



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