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Aerospace

Flyback Switcher IC Delivers High Accuracy and Efficiency

19 January 2017

LinkSwitch™-XT2 family of offline, low-power converter ICs. Source: Power Integrations LinkSwitch™-XT2 family of offline, low-power converter ICs. Source: Power Integrations Power Integrations has introduced its LinkSwitch™-XT2 family of offline, low-power converter ICs offering high accuracy, high-efficiency and excellent no-load performance. LinkSwitch-XT2ICs target isolated and non-isolated flyback applications in which accurate regulation of output voltage and current are important. The ICs can deliver up to 6.1 W in wide-input range designs, and up to 9.2 W for 230 VAC open-frame applications.

Designed for flyback topologies, the LinkSwitch-XT2 family delivers designs that exhibit current and voltage regulations of better than -/+ 3% and typical efficiency above 80%. LinkSwitch-XT2 ICs consume less than 10 mW in no-load conditions. A high (132 kHz) operating frequency enables the use of small power transformers, while the programmable current limit (ILIM) function enables further transformer optimization.

LinkSwitch-XT2  converters combine a 725 V power MOSFET with control circuitry on a single silicon die. Integrated safety and reliability features include input overvoltage protection, hysteretic thermal shutdown for over-temperature protection and auto-restart for output short-circuit, overvoltage and open-loop protection.

LinkSwitch-XT2 ICs come in three packages: P-package (DIP-8C), D-package (SO-8C), and G-package (SMD-8C) and are priced at $0.40 in 10,000-piece quantities.



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