UE130 DC/DC converters

UE130 isolated wide-range DC/DC converters from Murata deliver a full 30 W output power from a board area of just 7 cm². Designed for PCB mounting, the modules deliver DC regulated power and are for use in both battery- and mains-powered equipment in applications requiring wide input voltage, such as small instruments, computer-based systems, datacoms equipment, remote sensor systems and vehicle electronics.

The series comprises eight input/output combinations giving tightly regulated fixed output voltages of 3.3, 5, 12 and 15 DC and a choice of 4:1 inputs of 9 to 36 VDC or 18 to 75 VDC. A synchronous rectifier forward topology helps the series achieve efficiency levels of up to 91% and minimal heat build-up allowing operation without cooling fans.

Design features include full magnetic and optical isolation up to 2250 VDC (basic insulation) and all modules have an operating temperature range of -40 to +85 °C (with derating). Good ripple and noise specifications and fast transient response ensure compatibility to circuits using CPUs, ASICs, programmable logic and FPGAs.

The converter fully regulates even under no load conditions, and for systems requiring controlled start-up and shutdown a remote on/off feature with either positive of negative logic is provided. The output voltage may be adjusted to within ±10% of its nominal value.

The series incorporates a number of self-protection features to avoid both converter and external circuit problems, including input undervoltage lockout input transient protection and overtemperature shutdown. Output current limit uses a ‘hiccup’ auto-restart technique and the converter can withstand continuous short-circuit. Additional features include output overvoltage and reverse conduction elimination.