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40 or 60W LED power supplies have switch-selectable output current levels Sunpower has introduced a series of flexible constant current output LED power supplies to meet today’s demand for intelligent LED lighting control. Rated at 40W or 60W, their output current levels can be set by a built-in DIP switch. The LCM-40 and LCM-60 models have a dual dimming function, accepting either 0 – 10 Vdc or a PWM signal as their dimming control input. The LCM-40DA and LCM-60DA digital control versions feature a built-in DALI interface as well as a push dimming function. Both models are ideal for meeting the performance and flexibility demands of today’s intelligent digital dimming applications. These LCM models feature a 180 to 295 Vac input and built-in two stage active PFC function, with a power factor exceeding 0.9 for loads over 35%. The series’ harmonic current limitations comply with EN61000-3-2 Class C above a 35% load. Their Line-Neutral surge immunity of 2 kV complies with EN61000-4-5 heavy industry level and meets related lighting standards. Modern high performance circuit topology ensures that these products operate at up to 91.5% efficiency, allowing free air convection cooling in ambient temperatures from -30˚C to +60˚C. A 12V 50mA auxiliary output is however available if a fan is required. All models accept inputs from external NTC resistor temperature sensors, allowing temperature compensation of the output current. The series also features synchronised dimming with up to 9 slaves. Sunpower Technology www.sunpower-uk.com Lighter AC-DC power supplies deliver performance improvements TDK Corporation has introduced the TDK-Lambda HWS-A series of AC-DC power supplies, which comprises five models rated from 15-150W to meet a wide range of customer requirements. The HWS-A series is an upgrade of the HWS series which was originally introduced in 2005, typical industrial applications include equipment used for factory automation, process control, LED display and signage, test and measurement, broadcast and communications. The HWS-A is completely form, fit and function compatible with the HWS series to enable easy upgrade, with the added bonus that it is up to 12% lighter in weight. The new series also achieves up to a three percent improvement in efficiency at full load (up to 91% efficiency), and up to a four percent improvement at low loads. Power consumption at no load is also lower, thereby contributing to a reduction in environmental impact. Operating from a universal input of 85-265 Vac (47-63 Hz), the 50, 100 and 150 W HWS-A models include active power factor correction and all models are EN61000-3-2 compliant. HWS-A meets SEMI F47 requirements at high line input. Each of the 15, 30, 50, 100 and 150W models is available with nominal outputs of 3.3, 5, 12, 15, 24 and 48 Vdc. The operating temperature range is from -10 to +50°C at full load. TDK-Lambda www.uk.tdk-lambda.com Pre-qualified lithium-ion batteries target medical device design applications UK-based battery specialist, Accutronics, has launched a new range of pre-qualified and pre-tested batteries. The customisable 14.4V VR420 batteries use lithium-ion technology to deliver high volumetric and gravimetric energy density so that equipment runs for longer yet weighs less. The unit includes a SMBus (System Management Bus), SBS (Smart Battery System) compliant impedance tracking fuel gauge that allows the battery to communicate pertinent battery data between itself, a smart host and a smart charger. When configured in a product, the host equipment is able to easily request dynamic information from the battery such as runtime to empty, cycle count and discharge current as well as static information such as serial number, manufacturer name and part number. The data allows the customers device to better manage its own power which can increase device runtimes and reduce the number of premature device shutdowns. Additionally, a five bar LED display on the battery case allows the user to easily determine the state of charge in simple 20% increments. The VR420 includes its own active and passive protection devices which prevent it from being over-charged, overdischarged or overloaded in an abuse condition. Holding safety certification to IEC62133 and UL2054, the VR420 is easily designed into new devices with minimal time and cost. Designed for rugged work environments the VR420 features a black flame retardant plastic housing which includes a polarised rail feature down either side so the VR420 can be slid into a host device with minimal effort. Transportation of the VR420 is simplified as the product has a stored energy of less than 100 Watt-Hours and it has been independently certified to the Manual of Tests and Criteria (ST/SG/AC.10/11/ Rev5) section 38.3. The VR420 is available in two versions; VR420A and VR420B, supplying 6.2 Ah and 4.4 Ah respectively. The ‘A’ version provides highest capacity, whilst the ‘B’ option is optimized for higher discharge applications. Accutronics www.accutronics.co.uk Battery pack provides constant power to LED arrays during a loss of AC power IOTA has introduced the ILB-CP Constant Power LED Emergency Battery Pack Series which is a family of integral emergency battery packs that deliver constant power to the LED array during a loss of normal AC power. Unlike most LED battery packs, ILB-CP’s constant power design maintains the output wattage to the system even while system battery current decreases, meaning no degradation in emergency illumination during the required 90-minute duration. ILB-CP models feature 18-48VF and are available for 5, 7 and 10 watt LED designs. In addition to the constant power output, the ILB-CP Series offers a selection of available mounting configurations for accommodating the requirements of different LED fixture types. The ILB-CP Series are UL Recognized Components and are covered under IOTA’s 5-year warranty. IOTA Engineering www.iotaengineering.com www.electronics-eetimes.com Electronic Engineering Times Europe December 2013 41


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