New Industry Products

550W to 650W Modular PSUs with Full MoPPs Isolation and up to 10 Outputs

July 02, 2019 by Scott McMahan

TDK Corporation introduced the TDK-Lambda brand QM4 modular power supplies rated at 550W to 650W. These new power supplies further extend the QM series, which can deliver up to 1500W output power. The QM4 models are available with up to 10 outputs. They feature full MoPPs (Means of Patient Protection) isolation and have low acoustic noise.

With industrial and medical safety certifications, the power supplies are suitable for use in medical, communications and broadcast equipment, as well as test and measurement.

Accepting a wide range 90Vac to 264Vac, 47Hz to 63Hz input (440Hz with reduced PFC), the QM4 can deliver 550W at low line and 650W with a high line 180Vac to 264Vac input.

A simple online configurator can be used to configure the series to deliver 1 to 10 independently regulated outputs and include remote on/off and individual output good signal functions.

The QM series modules have output voltages that range from 2.8V to 105.6V, and they have output power levels from 300W to 1200W.

A further subset of option modules provides an ac-fail signal, standby voltages (up to 12V, up to 2A), global remote on/off and PMBus™ communications.

QM4 modules measure 108mm x 63.3mm x 270mm. The QM4 can operate in ambient temperatures of -20°C to +70°C (-40°C start-up), with output power and output current linearly derating above 50°C to 50% at 70°C.

Efficiencies of up to 91% produce less heat than other competing models allowing the use of a low-speed cooling fan to reduce audible noise. A lower airflow speed also reduces the ingress of dirt and other contaminants, improving product reliability.

TDK backs all models in the QM series with a seven-year warranty that comes standard.

The power supply has 4,000Vac (2 x MoPPs) input to output isolation, 1,500Vac (1 x MoPP) input to ground isolation, and 1,500Vac (1 x MoPP) output to ground isolation.

All models are certified to the IEC/EN/UL/CSA 60601-1, ANSI/AAMI ES 60601-1 and IEC/EN/UL/CSA 60950-1 safety standards. TDK also designed the QM series to meet IEC/EN61010-1 with CE marking for the Low Voltage, EMC and RoHS Directives.

Earth leakage current is below 300µA, and it complies with the EN61000-6-3:2007 and EN60601-1-2:2015 (curve B conducted and radiated) emission standards. The PSUs also meet the EN60601-1-2 and EN61000-6-2 immunity standards, and TDK designed and manufactured them under the control of ISO9001 and ISO13485 (including risk management).

Main features and benefits

  • Full medical isolation (MoPP), suitable for B and BF-rated equipment
  • Low Speed, low audible noise fans
  • Up to 10 outputs
  • 7-year warranty