Quiet 1U supply delivers 800W

TDK’s new TDK-Lambda 1U MU4 series of quiet AC/DC modular power supplies suits test and medical applications where audible disturbances need to be minimised. The supply can provide up to five isolated and regulated outputs delivering up to 800W. All models feature means of patient protection (MOPPs) isolation (including output to earth) to simplify implementation into BF-rated medical applications. Other target applications include dental, test and measurement, broadcast, professional audio and industrial equipment.


With intelligent fan control, the MU4 fan rotation speed is reduced, producing audible noise as low as 36dBA. Its microcontroller algorithm monitors temperature at the primary converter and each output module, adjusting fan speed for optimum cooling.


Initially, nine modules are available, offering a continuous range of voltages from 3.3 to 104V with ratings from 150 to 480W. Options include: a 5V/2A standby voltage; fan fail signal; inhibit and enable (for individual or all outputs); DC good; PMBus communication; and current share for parallel configurations.