Power Electronics / Power Management


AC-DC power supplies

20 July 2011 Power Electronics / Power Management

TDK-Lambda has developed a new series of ‘green’ power supplies that comply with the energy saving requirements of Energy Star and the ErP (Energy related Products) directives.

Designed for use in light industrial equipment and


front-end equipment for broadcast and communications applications, the 250 W GWS series AC-DC power supply combines high efficiency, high power density and low standby power with a five-year warranty. The GWS250 is equally well suited for indoor and outdoor LED information displays and digital signage, traffic controls, test and measurement and entertainment systems.

Designed with a 105 x 199 mm footprint and 1U height, the unit is compact and convection cooled. Rated at 250 W, it is offered in four models with nominal outputs of 12 V (21 A), 24 V (10,5 A), 36 V (7 A) and 48 V (5,3 A). Outputs are user adjusted by up to 20% depending on model type and the 24 V and 36 V models have a peak power rating of 300 W. With a flat efficiency curve averaging at 93%, from 25% to 100% load, the GWS250 range can be operated at full load from -25°C to 50°C ambient temperature and up to +70°C with suitable derating.

The GWS250 series incorporates over-voltage, over-temperature and over-current protection (constant current mode for 24 V, 36 V and 48 V models, 12 V hiccup mode). Models in the series also feature <0,5 W no-load input power, 5 V/0,3 A standby output, remote on/off, DC GOOD signal and a voltage programming function as standard.

For more information contact Accutronics, +27 (0)11 781 2645, sales@accutronics.co.za, www.accutronics.co.za, Vepac Electronics, +27 (0)11 453 1910, sales@vepac.co.za, www.vepac.co.za



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