TI introduces isolated DC/DC converter for low-noise 2-W power supplies

DALLAS, May 31, 2011 /PRNewswire/ -- Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a high-efficiency, primary-side feedback transformer driver for isolated 2-W power supplies, which are used in programmable logic controllers, industrial automation and other noise-sensitive data acquisition designs. For product details, SPICE model, design tools and evaluation modules visit: www.ti.com/tps55010-pr.    

The high-efficiency TPS55010 with integrated FETs features a simple and unique 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 3.3-V or 5-V input. The 2-W converter does not need an optocoupler, and provides up to 85-percent power efficiency.

Power management for high-speed digital isolation

The isolated DC/DC converter can be used with high-speed digital isolators, such as the ISO721 and ISO722, and isolated transceivers like the ISO1176 isolated Profibus device, the ISO35 isolated 3.3-V RS-485 device and the ISO3086 isolated 5-V RS-485 transceiver. 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 elimination.

Key features and benefits of the TPS55010:

• 2-W isolated power converter with integrated FETs supports variety of industrial designs. Output voltage is set by a resistor divider and the transformer turns ratio.
• Wide switching frequency range (100 kHz to 2 MHz) offers design flexibility to optimize efficiency and space.  Frequency can be synchronized to a master clock to reduce noise in sensitive data acquisition circuitry.
• Supports -40 degrees C to +150 degrees C operating junction temperature and comes in a space-saving, thermally enhanced 3-mm x 3-mm x 1-mm monolithic QFN package.

Availability and pricing

The TPS55010 is available in volume now from TI and its authorized distributors in a 16-pin, 3-mm x 3-mm thermally enhanced QFN package. Suggested resale pricing is $1.65 in 1,000-unit quantities. The DCP010505 plug-in module comes in a 7-pin SIP package with a suggested resale price of $5.35 in 1,000-unit quantities.

Find out more about TI's power and interface products and design tools:

• Order the TPS55010 development kit (TPS55010EVM-009) for isolated power.
• Check out the TI E2E™ Community to correspond with TI power design engineers.
• Power Stage Designer™ software design tool: www.ti.com/powerstagedesigner-pr.
• SWIFT™ DC/DC step-down converter portfolio: www.ti.com/swift-pr.
• Isolated interface solutions: www.ti.com/interface-pr.  

About Texas Instruments

Texas Instruments semiconductor innovations help 80,000 customers unlock the possibilities of the world as it could be – smarter, safer, greener, healthier and more fun. Our commitment to building a better future is ingrained in everything we do – from the responsible manufacturing of our semiconductors, to caring for our employees, to giving back inside our communities. This is just the beginning of our story. Learn more at www.ti.com.

Trademarks

Fly-Buck, Power Stage Designer, SWIFT and TI E2E are trademarks of Texas Instruments. All trademarks and registered trademarks are property of their respective owners.

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SOURCE Texas Instruments Incorporated