Emerson Network Power LCC250 VDC power supply

Emerson Network Power has expanded its LCC250 series of 250 W sealed fanless AC-DC power supplies with a 48 VDC model. Complying with the international EN60601-1 safety standard for medical electrical equipment, they are suitable for a wide range of sealed box and desktop healthcare applications, where the absence of cooling fans can help minimise dust and noise.

The supplies are high-efficiency designs, typically achieving 91% at full load.

The series includes conduction-cooled models providing full useable power at elevated temperatures.

Supplies fed from a nominal 115 VAC input are capable of maintaining their full 250 W load capacity up to their maximum baseplate
temperature of 85°C.

A robust, fully sealed enclosure provides the series with IP64 protection against dust and water.

They are also capable of operating in constant-voltage or constant-current mode, which is frequently a requirement for LED lighting applications.

Active power factor correction is employed to minimise input harmonic current distortion. The supplies have a safety-ground leakage current of less than 275 μA when fed with a 250 VAC input and provide an output hold-up time of at least 16 ms when fed with a 115 VAC input and delivering full load.

Overcurrent and overtemperature protection are fully auto-recovering; overvoltage protection is latching and requires the AC input to be recycled before output power can be restored.