Proving the Business Case for the Internet of Things

Converter improves power density for smart meters and grids

Steve Rogerson
March 16, 2015
To improve power density in smart grid and smart meter applications, Texas Instruments has introduced the industry’s first 65V synchronous step-down converter that provides isolated bias supplies up to 15W without the need for an optocoupler.
As part of TI’s Fly-Buck power portfolio, the LM5160A improves power density and addresses higher power needs in industrial and automotive applications, such as three-phase AC motor drives, programmable logic controllers, smart metering, renewable energy or grid infrastructure, factory automation, power over Ethernet IP cameras and electric vehicles.
The converter has a constant on-time control that requires no loop compensation and supports high step-down ratios with fast transient response. The device, which supports an input voltage of 4.5 to 65V, can generate positive and negative bias-supply rails in non-isolated designs, or single and multiple isolated outputs, while reducing size and simplifying the design compared with traditional flyback products. Used with Webench online design tools, it can speed time to market of high-power DC-DC designs.
The input voltage range lets the converter efficiently operate in harsh transient conditions without the need for input clamp circuits, resulting in higher reliability. Programmable soft start reduces in-rush currents when powering up into heavy loads or large capacitance.
Webench online tools enable end-to-end circuit design, simulation and optimisation for footprint, price and efficiency, with the ability to download schematic and PCB layout files directly into computer-aided design tools. Component libraries include more than 40,000 components from 120 manufacturers. Available in eight languages, users can compare complete system designs and make supply-chain decisions in minutes.