Texas Instruments announced a high-efficiency, primary-side feedback transformer driver for an isolated 2 W power supply that can be used in programmable logic controllers, industrial automation, and other noise-sensitive data acquisition designs. Product details, SPICE models, design tools, and evaluation boards, please visit:. Com. Cn/tps55010-pr.

The high-efficiency TPS55010 with integrated FETs uses a simple, unique Fly-Buck topology to provide not only isolated power, but also eliminates ground loops in analog circuits and communication interfaces (RS-485, RS-232, etc.). The input voltage is 3.3 V or 5 V. The 2 W converter requires no optocoupler and can provide up to 85% power efficiency.

High-speed digital isolated power management isolated DC/DC converters can be used with high-speed digital isolators such as ISO721 and ISO722, as well as ISO1176 isolated Profibus devices, ISO35 isolated 3.3 V RS-485 and ISO3086 isolated 5 V RS- 485 and other isolated transceiver use. In addition to the TPS55010, TI's popular 1 W DCP010505 open frame power module with integrated transformer provides simple isolated power conversion and ground loop restrictions.

The main features and advantages of the TPS55010:

The 2 W isolated power converter with integrated FETs supports a variety of industrial designs. The output voltage can be set by the resistor divider, while the transformer can change the ratio;

The wide switching frequency (100 kHz to 2 MHz) provides a high degree of design flexibility for optimizing efficiency and space. The frequency can be synchronized with the master clock, which can reduce the noise in the sensitive data acquisition circuit;

Supports -40°C to +150°C operating junction temperature in a thermally enhanced, small 3mm x 3mm x 1mm monolithic QFN package.

Availability The TPS55010 in a 16-pin, 3mm x 3mm thermally enhanced QFN package is available now in volume quantities and can be ordered by TI and its authorized distributors. The DCP010505 plug-in module is available in a 7-pin SIP package.