Isolated Wide-Range DC-DC Converters

UEI30 Series with Wide 4:1 Input Range - Now Available at Digi-Key

Isolated Wide-Range DC/DC Converters Murata Power Solutions' UEI30 isolated wide-range DC/DC converters deliver a full 30 W output power from a board area of just 1.8in2. The UEI30 gives tightly regulated, fixed output voltages of 5 VDC and a 4:1 input of 18 VDC to 75 VDC. A synchronous rectifier forward topology helps the UEI30 Series achieve high efficiency levels of up to 91% and minimal heat build-up allowing operation without cooling fans.


The UEI 30 W Series includes full magnetic and optical isolation up to 2250 VDC (basic insulation). For connection to digital systems, the outputs offer fast settling to current step loads and tolerance of higher capacitive loads. Excellent ripple and noise specifications assure compatibility to circuits using CPU's, ASIC's, programmable logic and FPGA's. No minimum load is required. For systems requiring controlled start-up and shutdown, an external switch, transistor or digital logic may be used to activate the remote On/Off control. Remote sense inputs compensate for resistive line drops at high currents.

A wealth of self-protection features help to avoid both converter and external circuit problems. These features include: input under-voltage lockout, over-temperature shutdown, output over-voltage, and reverse conduction elimination.

Primary Features Protection Features and Safety
  • Wide 4:1 input at a competitive price
  • Low profile compact design 0.35" (8.9 mm)
  • High efficiency to 91%
  • Input-output isolation to 2250 VDC (basic)
  • Operating temperature range -40°C to 85°C (derating)
  • Start-up into pre-biased loads
  • Input over-voltage/transient protection (auto recovery)
  • Input under-voltage cut-out (auto restart)
  • Output over-current/short circuit protection (hiccup)
  • Over-temperature protection (auto recovery)
  • Stable no load operation
  • Start-up into pre-biased loads
  • UL/EN/IEC 60950 safety approvals in progress
  • I/O isolation voltage up to 2250 VDC (BASIC)
Standard Functions Environmental
  • Remote on/off with positive or negative logic
  • Output voltage trim
  • RoHS 6/6 compliant (5/6 on request/special order)
Applications Markets
  • Mobile and battery powered applications
  • Robotics
  • Test equipment
  • High reliability (COTS)
  • Telecom, wireless
  • Distributed power architecture (DPA)
  • Low-mid power broad market applications
  • Industrial and instrumentation
  • Transportation
  • Aerospace
  • Telecom and wireless equipment
  • Computers and office equipment

Isolated DC-DC Converters

ImageManufacturer Part NumberDescriptionNumber of OutputsAvailable Quantity
UEI30-050-Q48N-C datasheet linkCONVERT DC/DC 30W 5V SNGL NEGUEI30-050-Q48N-CCONVERT DC/DC 30W 5V SNGL NEG1256 - Immediate
UEI30-050-Q48N-C product page link
Published: 2009-08-27