2kW AC-DC converter has 18 outputs and full medical MoPP isolation

October 10, 2019 //By Nick Flaherty
TDK Lambda's QM8B 2kW AC-DC converter has 18 outputs with digital PMbus control
TDK Lambda's QM8B 2kW AC-DC converter has 18 outputs with digital PMbus control for medical applications

TDK has launched a series of 2kW AC-DC converter power supplies with the capability of providing up to 18 outputs. 

Like all the models in the QM series, the QM8B features low acoustic noise and full MoPPs isolation.  With both medical and industrial safety certifications, the QM8B addresses a wide range of applications, including BF rated medical equipment, test and measurement, broadcast, communications and renewable energy.

Accepting a wide range 90-264Vac 47-440Hz input, the QM8B can deliver 1500W output power or 2000W with a high line input of 180-264Vac.  Available output voltages range from 2.8V to 105.6V and up to eight single or dual modules can be fitted.  Optional standby/signal modules can be specified with a choice of one or two standby voltages (5V, 12V and 13.5V at up to 2A), a PMBus communication interface and unit inhibit or unit enable, and an AC Good signal. 

The AC-DC converter units can operate in ambient temperatures of -20°C to +70°C, derating output power and output current by 2.5 percent per °C above 50°C.  Overall case dimensions are 200 x 63.3 x 268mm (W x H x D), and the weight is between 2.3 to 3.4kg, depending on the module configuration. 

The QM series operating efficiency is up to 91 percent, reducing internal heat losses, allowing the use of low speed, low audible noise fans for cooling.  This provides an enhanced patient/user experience and increased reliability.  The QM series is covered by a seven-year warranty.

The QM series is certified to IEC/EN/UL/CSA 60601-1, ANSI/AAMI ES 60601-1, IEC/EN 61010-1, IEC/EN/UL/CSA 60950-1 and IEC/EN/UL/CSA 62368-1 with CE marking for the Low Voltage, EMC and RoHS Directives.  With an input to output isolation of 4,000Vac (2 x MoPPs), 1.500Vac input to ground (1 x MoPP) and 1,500Vac (1 x MoPP) output to ground, the series can be used in BF rated medical equipment. 


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