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Switcher ICs offer 6.5W power output

Posted: 20 May 2011 ?? ?Print Version ?Bookmark and Share

Keywords:switcher IC? standby? energy consumption?

Power Integrations introduces two members of its LinkZero-AX product family, the LNK585 and LNK586, along with a PI University introductory video course that explains how designers can achieve 0.00 watts of standby energy consumption. Launched in October 2010, the LinkZero-AX integrated offline switching IC family now offers increased main power output up to 6.5Wdouble the maximum output of earlier members of the product family. The expanded power range enables designers to utilize LinkZero-AX in a wider array of applications, including those with multiple auxiliary power functions, as is often the case in appliances, TVs, and remotely controlled electronic lighting ballasts.

LinkZero-AX eliminates wasted energy by employing an innovative power-down mode that effectively turns off the auxiliary power supply when the application is idle, shutting down switch-mode operation and internal switch control circuits. LinkZero-AX can be re-awakened from power-down mode with a reset pulse or button press. Also, the bypass pin can provide up to 500?A for use by any system-control or sensing circuit.

Key features of the LinkZero-AX family, including the special power-down mode, are described in the free-to-download PI University video course. The video also discusses how to handle transient load conditions and wake-up requirements, and how to deliver power to auxiliary outputs (such as IR receivers) during power-down mode.

Auxiliary power supplies continuously draw power as long as the product is plugged in, typically resulting in significant standby energy waste. LinkZero-AX ICs can reduce this usage to a minuscule 3mWlow enough to be considered 'zero' under IEC standards. (IEC 62301 Clause 4.5 classifies power usage of than 5mW as zero.) Five years of continuous standby operation at 3mW would consume less than two cents worth of energy.

Delivering the industry's lowest component count for standby power supplies, LinkZero-AX is a simple design upgrade and allows designers to easily exceed all global energy-efficiency regulations, including the European EcoDesign Directive 'Energy Star'. LinkZero-AX ICs are available now in SO-8C or SMD-8C packages priced at $0.41 each for 10,000-piece quantities (LNK586DG). Full technical details, including the PI University course, product datasheet, and design ideas are available on the Power Integrations website.





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