MU4 Series Multiple Output Modular Power Supply

TDK-Lambda’s MU4 series of 1U high-power supplies features very low acoustic noise and BF-ready medical isolation. The MU4 can provide 600 W with an input of 85 V_AC to 264 V_AC (derate below 90 V_AC) and 800 W with a 180 V_AC to 264 V_AC input. Up to five fully isolated output modules are easily configured through the use of an online configurator. Target applications include medical, dental, broadcast, professional audio, test and measurement, and industrial equipment requiring a low 41 mm height and/or low audible noise.

A patented intelligent fan speed control circuit uses a microcontroller algorithm to monitor the temperature of the primary converter and each individual secondary module. This enables the speed of the fan to be accurately adjusted and optimized to provide an audible noise as low as 36 dBA, even with an 80% load. A low noise level improves patient comfort and reduces operator fatigue.

Initially, nine 150 W to 400 W rated output modules are available, providing continuous coverage from 3.3 V to 104 V_DC. Each module includes remote on/off, remote sense, and an output good signal as standard. Options for the MU4 include a 5 V / 2 A standby voltage, fan-fail signal, inhibit and enable for all outputs, AC fail, PMBus® communication, and current share for configurations requiring parallel operation.

The product has efficiencies of up to 90% and will operate in ambient temperatures of -20°C to +70°C, derating linearly to 50% load above +50°C. The earth leakage current is less than 300 µA including all tolerances, and the touch current is <100 µA. The size is a compact 89 mm x 41 mm x 257.5 mm or 3.5 inches x 1.61 inches x 10.1 inches (W x H x D). A seven-year warranty is provided as standard.