New 650W modular power supplies offer up to 10 outputs

TDK-Lambdavisit website


TDK Corporation is launching the QM4 series of AC-DC modular power supplies, reducing the series’ footprint by 15 per cent. The 108mm-wide QM4 can accept up to four single or dual output modules and a dual output standby/signal board to provide up to 10 outputs. All models in the QM series feature low acoustic noise and full MOPPs isolation. With medical and industrial safety certifications, the QM series is suitable for use in a wide range of applications, including BF rated medical equipment, test and measurement, broadcast, communications and renewable energy.

The QM4 can deliver 650W output power with a 180–264V AC input and 550W with a wide-range 90–264V AC input. Output voltages from 2.8V to 105.6V can be specified and an optional standby/signal module can be fitted. This provides a choice of one or two standby voltages (5V, 12V and 13.5V at up to 2A), a PMBus communication interface, unit inhibit or enable, and an AC Good signal.

The units can operate in ambient temperatures of –20 to +70degC, derating output power and output current by 2.5 per cent per degC above 50degC. Overall case dimensions are a compact 108 × 63.5 × 270mm (W × H × D), and the weight is between 1.125kg and 1.845kg, depending on the module configuration. The QM series’ operating efficiency is up to 91 per cent, reducing internal heat losses and allowing the use of a low-speed, low audible noise fan for cooling. This enhances the patient/user experience and increases reliability. The series is also covered by a 7-year warranty.

The QM series power supplies are certified to IEC/EN/UL/CSA 60601 1, ANSI/AAMI ES 60601 1, IEC/EN 61010 1 and IEC/EN/UL/CSA 60950 1, with CE marking for the Low Voltage, EMC and RoHS2 Directives. With an input to output isolation of 4,000Vac (2 × MOPPs), 1500V AC input to ground (1 × MOPP) and 1500V AC (1 × MOPP) output to ground, the series can be used in BF rated medical equipment such as blood pressure monitors and incubators. The QM4 has a maximum earth leakage current of 300uA, while still complying with the EN61000-6-3:2007 and EN60601-1-2:2015 (curve B conducted and radiated) emission standards. The units also meet the EN60601-1-2 and EN61000-6-2 immunity standards.

Selecting products from the QM series has been made simple using an online configurator, which provides an optimised module selection with a choice of signals, leakage current and standby voltages. Upon entering the desired output voltages and currents, the configurator will automatically produce a short 7-digit code to facilitate easy order placement.

Follow the link for more information about the QM series of AC-DC modular power supplies from TDK-Lambda.

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