Product News I Power Management
New range of TO-220 footprint compatible switching regulators
Campbell Collins Ltd, a specialist supplier of power supplies, capacitors and hi-rel power semiconductors, is making available a new range of TO-220 footprint compatible switching regulators from Arch Electronics, which will offer customers an ultra high efficiency alternative to LMxx Linear Regulator devices.
The SR78/1000 series has a wide input range of 4.6V to 36V; nominal set point output voltages of 1.5V, 1.8V, 2.5V, 3.3V, 5V, 6.5V, 9V, 12V & 15V; and delivers up to 1A of output current at efficiencies of up to 96%. Non standard output voltages can also be offered on request. Since the efficiency of the SR78/1000 is so much higher than the LMxx style of Linear Regulators, heatsinks are not required which makes for far simper mechanical and thermal designs, and much higher long term reliability. The high efficiency also means that power levels of up to 15W are available from a tiny 3-pin SIP package measuring just 11.5mm(W) x 10.2mm(H) x 7.55mm(D).
The SR78/1000 series come with Over Current Protection, Short Circuit Protection and Over Temperature Protection as standard, and are housed in a UL94V-0 rated package. Operating temperature range is -40°C to 85°C, and storage temperature range is -55°C to 125°C, making the devices suitable for a wide range of demanding applications. Typically, derating is not necessary unless operating above 60°C, and so the power density of the
HiTek Power introduces X-ray power supply for analytical applications
HiTek Power has introduced the XRF50, a 50W X-ray generator power supply for gridded tubes in industrial and scientific analytical applications. Measuring only 322 x 203 x 115mm, the supply is powered from a 24VDC input and has full RS232 digital control.
The XRF50 provides up to 50kV for the X- ray tube anode with a maximum current of 1.0mA. It also provides a low voltage output for the X-ray tube filament, with a current of up to 1.0A and a maximum voltage of 14V (Power limited to 3W), referenced to the 50kV negative output voltage. A floating grid output is also incorporated, providing an output voltage of 0 to+150V DC at up to 20mA and 0 to -200VDC at up to
New family of intelligent battery chargers from Yuasa
Yuasa Battery Sales (UK) has announced a new family of intelligent battery chargers that have been designed specifically to enable charging of all types of lead acid batteries including industrial VRLA, automotive, motorcycle and cyclic types used in mobility scooters and golf trolleys.
The new Yu-Power range features six models encompassing 900mA 12/6V for motorcycle batteries, through 2A 6 and 12V models, 4 and 8A 12V chargers to a 4A 24V unit. Apart from the 900mA 12/6V motorcycle battery charger, all models utilise the latest multi-stage and hybrid charging techniques to ensure optimum charging of batteries and enhancing the battery life.
Features include soft start technology to provide extra protection for both battery and charger, automatic desulphation for prolonged battery life and multi-state charging to deliver 100% state of charge. Chargers of 4A and
www.cieonline.co.uk
above are supplied with Torbury connectors as standard with a Torbury to crocodile clip converter while the motorcycle and 2A chargers feature standard motorcycle connectors with accessories available to convert to croc clips or ring connectors. A charger accessory adaptor is also available to allow connection to common golf trolley battery connectors.
The range also includes a basic battery state-of-charge analyser that indicates whether a battery is fully charged or semi-discharged.
Yuasa |
www.yuasa-battery.co.uk Components in Electronics July/August 2010 27 Charcroft puts your passives, emech & interconnect in safe hands
devices is as high as 280W/in3. The MTBF figure is in excess of 5Mhrs, and they come with a 2 year manufacturer’s warranty. “The SR78/1000 series offers our customers an ultra high efficiency alternative to unreliable, inefficient Linear Regulators” said Phil Goff, Sales & Marketing Manager for Campbell Collins. “Having the opportunity to improve their systems’ reliability without the need for a board redesign is a huge benefit to the customer” he continued.
Campbell Collins |
www.camcol.com
100microamps referenced to the 50kV negative output voltage.
The new unit has been designed to offer the high stability and low ripple demanded by today’s applications. Ripple on the high voltage output is less than 0.05 per cent of set voltage +15V peak-to-peak with a maximum of 25V p-p. Static load regulation for voltage is less than 0.01 per cent ±1V from 0.2mA to full load. Temperature drift is ±0.1 per cent over an 8 hour period after 30 minutes warm- up.
The RS232 interface provides the high levels of remote control and monitoring needed to meet the requirements of modern X-ray systems to be controlled more finely and the growing need to protect ever-more- expensive tubes. Flashover and continuous short-circuit protection are also incorporated, plus trips for over-temperature, output over- voltage and arc.
HiTek Power |
www.hitekpower.com
Passives lead-times are moving out, with some capacitors
already on allocation. But, with Charcroft’s specialist expertise, you can unlock deliveries of passives by second-sourcing close equivalents or using alternatives on short lead-times.
Second-sourced equivalents on fast lead-times Aluminium electrolytic capacitors Ceramic capacitors, including high-CV Power film capacitors Alternatives for fast replacement 5mm boxed polyester film capacitor alternatives Radial dipped ceramic capacitor alternatives Precision radial & surface-mount foil resistors
For availability,
Call Debbie on 01591 612231
www.charcroft.com
Lead-times shown are typical across a range of values in each technologyand may differ for a specific value.
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