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Product News I Power Management

40 W AC/DC constant current power supplies cut LED lighting costs

Sunpower has unveiled a new PLM- 40 series of 40 W AC/DC constant current power supplies. Described as highly economical to purchase and cost-effective to operate, they are suitable for the LED lighting market. Featuring a 110 – 295 VAC input range the series comprises of six models, with outputs ranging from 350 mA to 1750 mA. Their single stage PFC circuit design enables a high power factor of better than 0.9, while their efficiency is as high as 88%. Their harmonic current limits comply with EN61000-3-2 Class C and fulfil general lighting requirements. The entire series features a no-load power consumption of less than 0.5 W and a set-up time of less than 500 ms; these comply with the ErP regulations required by the European Union for lighting fixtures. The device’s high efficiency allows their operation in ambient temperatures from -30 to +45˚C with only free air convection cooling, as a result they can be designed into high working temperature environments which tend to be found in enclosed lighting systems. These units are built into a UL 94V-0 rated

Murata launches 94% efficient 1200 Watt power supply in 54mm form factor

plastic enclosure with a Class ll AC input design comprising two wires and no Frame Ground; this construction effectively protects users from electric shock. The PLM-40 units reduce time and difficulty in making I/O wiring connections, as they provide a screw-less push clamp terminal block. This is more convenient for installation than the usual I/O wiring arrangement. Short circuit and over voltage protection is

provided, while all products carry global certificates for ENEC EN61347-2-13, EN62384, UL8750, CB, and CE lighting related regulations.

Sunpower UK |

Murata Power Solutions has launched the D1U54P series of 54mm wide 1200 Watt front end power supplies. With efficiency of greater than 94% and a power density in excess of 28 Watts per cubic inch, these low profile units measure only 54.5 x 321.5 x 40 mm and fit the industry standard 1U package format. The high efficiency of the series significantly lowers the cooling requirements and also contributes to power savings in customer applications. In addition, the design offers at least 8% more power than competitors in the same form factor. The D1U54P series comprises two models, both providing a + 12 VDC 1200 Watt output and an auxiliary +5 VDC 15 Watt output. The power factor corrected D1U54P series accommodates the universal AC input range from 90 to 264 VAC. Forced air cooling is provided by an internal variable-speed fan. The series features a 0 to 60 degrees C operating temperature range.

The D1U54P series features hot-swapping and active current sharing for up to 8 supplies to be connected together. Safety features include output overvoltage, output overcurrent, and self-resetting overtemperature protection. PMBus

SiC MOSFETs set to ‘revolutionise’ electric vehicle power converters

Cree has announced that Shinry Technologies, a company that specialises in energy efficient applications in transportation and lighting, has employed Cree’s 1200V C2M family of SiC MOSFETs in its new, hybrid electric and electric vehicle (HEV/EV) power converters to achieve 96 percent efficiency. According to Shinry Technologies, the C2M SiC MOSFETS enabled a 25 percent reduction in product size and reduced peak power losses by over 60 percent compared to the traditional silicon versions.

Based in Shenzhen, China, Shinry

Technologies is a specialist in creating HEV/EV DC-DC converter, on-board charger and rapid charger solutions. By using Cree’s advanced second-generation SiC MOSFETs in its latest 3- 10 kW DC-DC converters designed for use in electric busses, Shinry said that it has been able to achieve “considerable efficiency improvement and significant size and weight reduction“. Introduced in March 2013, Cree’s C2M

family of SiC MOSFETs have, according to the company, been able to achieve more than three times the power density of typical silicon technology in standard power supply designs. Cree MOSFETs have been actively employed in solar inverters, industrial power supplies, battery chargers, uninterruptible power supply (UPS) systems and several other applications. These new 1200V and 1700V MOSFETs means that manufacturers are able to differentiate their products in the market

management and I2C interface with status indicators and boot loading are also available. Bi- Colour LEDs on the front panel indicate the status of the power supply. The D1U54P series design uses a low component count, resulting in high reliability (MTBF 529K hours). Typical applications for the D1U54P series include data centers, servers, storage sub- systems, and data communications infrastructure equipment. The D1U54P series complies with international safety standards IEC/EN/CSA/UL BSMI and CCC 60950-1 for IT equipment.

Murata Power Solutions |

through significant improvements in efficiency, reliability and/or power density, the latter of which can also lead to reductions in the size, weight, volume and, in some cases, even the total cost of power systems. Packaged SiC MOSFETs from Cree are available from DigiKey, Farnell/Newark, Richardson and Mouser, and die are available from SemiDice. For more information, please visit or contact a local Cree sales person or distributor.

Cree |

Components in Electronics

December 2013/January 2014 27

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