Targeted at industrial automation and other noise-sensitive data acquisition designs Texas Instruments has introduced a new primary-side feedback transformer driver for isolated 2W power supplies.
The TPS55010 with integrated FETs features a simple Fly-Buck topology to provide isolated power and remove ground loops from analog circuitry and communication interfaces, such as RS-485 and RS-232, from an unregulated 3.3V or 5V input. The 2W converter does not need an optocoupler and is said to provide up to 85-percent power efficiency.
The isolated DC/DC converter can be used with high-speed digital isolators, such as the company’s ISO721 and ISO722, and isolated transceivers like the ISO1176 isolated Profibus device, the ISO35 isolated 3.3V RS-485 device and the ISO3086 isolated 5V RS-485 transceiver.
The TPS55010 is available in volume now in a 16-pin, 3-mm x 3-mm thermally enhanced QFN package. Suggested resale pricing is $1.65 in 1,000-unit quantities.