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EETE MAY 2013

POWER COMPONENTS 1-cell Li-Ion/Li-polymer battery protection ICs Ricoh Europe has launched two new 1-cell Li-Ion / Li-polymer battery protection ICs, the R5475 and R5478 for use in rechargeable portable electronic devices. The 2.9x2.8x1.2mm chips offer advanced features including electronic safety measures for the charge and discharge process in order to assure a failsafe operation of the battery pack. The Li- Ion battery protection IC monitors the charge and discharge process and intervenes as soon as the process is at risk of going beyond the safe operation range of the battery cell. They offer standard detection circuits for example, over-charge voltage, over-discharge voltage, excess-discharge current and short protection. Optional latch and auto-release functions for the over-charge and over-discharge monitoring circuits are available. A latch function keeps the chip interrupted from the charge or discharge process while an auto release function tries to resume the process to normal operation after a time out period and when the interrupt condition is resolved to normal. Ricoh www.ricoh.com/LSI DC-DC converters offer improved efficiency, isolation, and thermal performance CUI Inc has introduced the company’s second generation of low power, board mount dc-dc converters with improved efficiency, isolation, and thermal performance compared to existing products. The unregulated dc-dc modules are available in 1 W and 2 W configurations, featuring 1.5 kVdc isolation and anti-static protection up to 8 kVdc. The PDS and PES series are designed with an ultra-wide operating temperature range of -40 to 105°C, offering a rugged and reliable solution for converting and/or isolating dc rails within a range of industrial, telecom, security, and machine control applications. The PDS and PES families are housed in compact, industry standard SIP, DIP, and SMT packages. Providing nominal inputs of 3.3, 5, 12, 15, and 24 Vdc and a range of single and dual output voltage configurations, the dc-dc converters are highly efficient, offering efficiencies as high as 89% in the 2 W models. To further enhance the series’ performance across the entire load curve, the modules have been designed to greatly reduce power draw under light and no load conditions. The new family of dc-dc converters also comes standard with continuous short circuit protection, providing an additional layer of protection for sensitive loads. CUI www.cui.com Full-bridge controller delivers wide operating temperature range With the the H-grade version of its LTC3722-1 a phase-modulated full bridge DC/DC controller with adaptive or manual zero voltage switching (ZVS), Linear Technology makes this IC available for applications subjected to high ambient temperatures. The LTC3722-1’s ZVS delay control and adjustable synchronous rectification timing optimize efficiency while reducing transformer size and electromagnetic interference, making it well suited for isolated high power applications of up to several kilowatts. The chip’s adaptive zero voltage technology is accomplished by sensing the bridge MOSFETs and input voltage, allowing the converter to adapt to any change in load current, temperature, component tolerances, driver circuitry delay or input voltage variations. Additional features include fixed frequency current mode control, adjustable current limit, leading edge blanking, soft start, short-circuit protection and programmable slope compensation. An accurate 5V low dropout regulator provides up to 15mA to power auxiliary circuits. The H-grade version operates up to a junction temperature of 150°C, compared to the E- and I-grade versions’ 85°C maximum junction temperature. The H-grade product is tested and guaranteed to the maximum junction temperature of 150°C, making it ideal for automotive and industrial applications which are subjected to high ambient temperatures. Linear Technology www.linear.com LED drivers output from 18 to 200W for indoor and outdoor solid state lighting The GenLume series of LED Drivers delivered by ERG Lighting offers a wide range of efficient and reliable drivers with output power from 18W to 200W, including exclusive easy-to-install wiring compartments that eliminate the need for a J-box. Applications include signage, outdoor lighting, strip lighting, and industrial illumination (such as high-bay lighting in warehouses and factories). Offering the SLD, XLD and XLA Series of LED drivers from GRE Alpha Electronics under the GenLume brand, ERG Lighting offers a 3-year warranty and full engineering support from their headquarters in Endicott, NY, along with 34 years of experience in building power supplies for the optoelectronics market. ERG Lighting maintains a wide range of GenLume product in stock, with no minimum order requirement. And, with a full range of state-of-the-art manufacturing equipment in house, ERG Lighting can also build custom solutions when needed. The GenLume XLD and SLD series are designed to operate with the highest efficiency and reliability at extreme environmental temperature and humidity conditions. These drivers operate over a wide temperature range of -40°C to 60°C without derating and are available with IP 65 option for operation in wet outdoor applications. User-adjustable output voltage and current are also standard features that make them the most versatile drivers on the market. The energy-efficient XLA series is a premier line of LED drivers that delivers smooth and flicker-free AC line dimming. This series is provided with either a 90-132 VAC input or a 180-264 VAC input option. ERG Lighting www.erglighting.com 28 Electronic Engineering Times Europe May 2013 www.electronics-eetimes.com


EETE MAY 2013
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