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Industry’s first high-current PMBus converters with frequency synchronization reduce EMI

2015-08-03 | Return

TI's 20-A and 30-A SWIFT™ DC/DC buck converters support adaptive voltage scaling for improved efficiency

Aug 3, 2015

DALLAS, Aug. 3, 2015 /PRNewswire/ -- Texas Instruments (TI) (NASDAQ: TXN) today introduced the industry's first 20-A and 30-A synchronous DC/DC buck converters with frequency synchronization for low-noise and reduced EMI/EMC and a PMBus interface for adaptive voltage scaling (AVS). TI's SWIFT™ 20-A TPS544B25 and 30-A TPS544C25 converters integrate MOSFETs and feature small PowerStack™ QFN packages to drive ASICs in space-constrained and power-dense applications in various markets, including wired and wireless communications, enterprise and cloud computing, and data storage systems. Used in conjunction with TI's award-winning WEBENCH® online design tools, the converters simplify power conversion and speed the power supply design process. For more information, samples and an evaluation module, visit www.ti.com/PMBusSWIFT-pr.

The highly integrated converters feature 0.5 percent reference-voltage accuracy and full differential remote-voltage sensing to meet the voltage requirements of deep sub-micron processors. Frequency synchronization to an external clock eliminates beat noise and reduces EMI. Additionally, the TPS544B25 and TPS544C25 offer pin-strapping that enables the devices to start up without PMBus commands to an output voltage set by a single resistor. Programmability, real-time monitoring of the output voltage, current and external temperature, and fault reporting via PMBus simplify power-supply design, increase reliability, and reduce component count and system cost. Read a blog post on "Selecting the correct PMBus POL solution for your application."

For applications such as enterprise Ethernet switches, TI also offers the UCD90240 24-rail PMBus power sequencer and power manager. Together, the TPS544C25 and UCD90240 provide a complete PMBus point-of-load (POL) and sequencing solution. Download the Complete PMBus Power System for Enterprise Ethernet Switches TI Designs reference design.

TPS544B25 and TPS544C25 key features and benefits

Integrated power MOSFETs support 20-A and 30-A of continuous output current.
On-chip PMBus interface and non-volatile memory simplify power-supply design and enable customization. Read a blog post on "PMBus – what is the value anyway?"
Voltage-control mode with input feed-forward improves noise margin and responds instantly to input voltage changes. Watch a video on the benefits of adaptive voltage scaling.
Other features include internal soft start, input under-voltage protection, thermal shutdown and a reset function.

Source：http://www.ti.com/