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New NXP Semiconductors Chips for Miniature Power Supplies

26.03.2014

New chips from NXP Semiconductors make it possible to create power supplies up to 45 W built into the power plug.

In recent years, in addition to traditional external power supplies (PSUs), other interesting options have been proposed for powering laptops. These include, for example, Power over Ethernet, wireless power, USB power (up to 100W), or external PCIe cables. At the same time, no matter how interesting new approaches appear, it will hardly be possible to abandon a conventional power supply even in the long term. But even with such a "conservative" approach, innovative solutions appear.

For example, NXP Semiconductors recently announced a set of voltage converters that can be used to create miniature, lightweight and efficient power supplies for laptops with a power consumption of no more than 45 watts. These are TEA1892 and TEA1836 microcircuits created within the GreenChip platform.

According to the developer, on the basis of a pair of these microcircuits, it is possible to produce power supplies half the size of an ordinary chocolate bar. Due to this compactness, it becomes possible to integrate power supplies directly into plug-in connectors for connection to the AC mains. This will greatly simplify the design and make it more convenient to use external power supplies for laptops.

Most importantly, a high degree of integration does not mean that the PSU components will be subject to overheating when operating at maximum power. The efficiency of the converters is over 93%, and the maximum case temperature should not exceed 55°C. The new chip pair also features extremely low standby power, with idle power consumption below 30mW.

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