Power Management I Product News
Campbell Collins releases range of high efficiency AC/DC converters
Campbell Collins Ltd, a specialist supplier of power supplies, capacitors and hi-rel power semiconductors, has announced that is is now stocking the GRN series of high efficiency, compact AC/DC Power Supplies from IPD (Integrated Power Designs) of the USA. The 80W GRN series offers single output models in a 2.5” x 4.25” x 1” package, and dual, triple and quad output models in a 5” x 3” x 1” package. The devices have been designed specifically to offer extremely low profile solutions for 80W applications when compared to similar competitive devices. Single output variants are available from 3.3V to 48V, and multiple output variants offer different combinations of voltages from 3.3V to 24V, including negative output voltages. Efficiency levels are as high as 89%, leading to high power densities, small package sizes, cooler operating temperatures and higher overall reliability. This also saves energy for the user and hence ultimately lowers operating costs. The efficiency curve is also very flat across the entire load range, offering consistent results under different load conditions while still offering >85% efficiencies at very light loads. Operating temperature range is from 0°C to +70°C, with full power being available up to 50°C in natural
convection environments (derates linearly to 50% available load at 70°C). The GRN offers internal hold-up from supply voltage interruptions for up to 16ms, and also meets the leakage current requirements of UL/EN60601-1 making them suitable for Medical applications as well as IT and Industrial applications. No minimum load is required to maintain output regulation, and MTBF figures are in excess of 100khrs according to Mil-Hdbk 217F.
Campbell Collins |
www.camcol.co.uk
Lithium-Ion battery market set to boom
Driven by plunging prices and accelerating demand from the electric and hybrid automobile market, a report from IHS iSuppli suggest that lithium-ion will emerge as the world’s leading rechargeable battery technology and is set to achieve 350 percent revenue growth from 2010 to 2020.
Global lithium-ion battery revenue is expected to expand to $53.7 billion in 2020, up from $11.8 billion in 2010. Revenue will rise to $31.4 billion in 2015, allowing lithium-ion to surpass the current dominant rechargeable battery technology, lead acid.
While lithium-ion will find wide usage in mobile electronics products such as cellphones and notebook PCs, usage in cars is expected to drive the bulk of sales growth. “Lithium-ion at present is much more expensive than alternative technologies, costing two to three times as much as sodium-sulfur, lead-acid and nickel-metal-hydride rechargeable batteries,” said Satoru Oyama, principal analyst of Japan electronics research for IHS. “However, lithium-ion pricing will decline much more rapidly than the other technologies, coming close to cost parity in 2015, and then becoming the least expensive type of rechargeable battery in 2020. Combined with the inherent advantages of the technology, the increasingly competitive cost of lithium-ion will cause car makers to employ it as their battery technology of choice in future electric and hybrid vehicles.”
Lithium-ion delivers several enhancements
compared to other rechargeable battery technologies.
These advantages include more flexible form factors and a lighter weight. Furthermore, lithium-ion devices have no memory effect, meaning they maintain their full capacity even after a partial recharge. Finally, lithium-ion batteries are considered to be more environmentally safe than other technologies. These features make lithium-ion particularly attractive for electric vehicles, hybrid electric vehicles and plug-in hybrid electric vehicles. Because of this, the automotive segment will be the leading market for lithium-ion batteries by 2015, surpassing the current top application, notebook PCs.
The dominant battery technology used in hybrid cars now is nickel-metal-hydride. More than 1 million hybrids with nickel-metal-hydride batteries were shipped in 2010, led by the Toyota Prius.
However, shipments of nickel-metal-hydride
www.cieonline.co.uk www.element14.com www.farnell.co.uk
batteries to the hybrid market will not grow in the future as the use of lithium-ion begins to take off.
One concern regarding the use of first- generation lithium-ion batteries in cars is safety. There can be a risk of fire using existing lithium- ion battery materials due to the high temperatures involved. There have been documented incidents of lithium-ion battery fires in smaller devices, such as PCs and mobile phones. To achieve acceptable safety levels for hybrid and electric vehicle batteries, lithium-ion battery makers must take steps to prevent internal short circuits which can cause external damage. These steps include improving control of power generation during discharges and enhancing the management of rapid charging. While automotive will be the dominant market for lithium-ion batteries, notebook PCs and cellphones will remain major markets for the technology, accounting for $12.3 billion in revenue in 2010, up from $7.8 billion in 2010. Other major uses for lithium-ion batteries include use in solar power systems, smart electricity grids and electric tools.
Components in Electronics September 2011 43
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