I will never forget the first time I demo’d the PMBus. About eight years ago, I was visiting with a power-supply design engineer and giving a PMBus buck-controller demo. With a stroke of a PC key, I could change the power supply soft start, switching frequency or output voltage. This left the designer literally with his mouth hanging open, because typically, changing these design parameters would have required a trip to the lab and time soldering new resistor/capacitor values, then measuring the performance.
While it was amazing then, PMBus is even more popular now. More and more companies in wired and wireless communication, enterprise server and storage, and even industrial segments use PMBus power supplies. It has become so popular because of its:
There are even more benefits:
Figure 1 – Turn On/Off PMBus Programming (multiple of the Soft Start time)
Figure 2 – Voltage Margin High and Low through PMBus
Figure 3 – Output Voltage, Current, and Temperature Monitoring through PMBus
If you are interested in finding out more about how to program and monitor a PMBus power converter, visit the TI booth (No. 1001) at the Applied Power Electronics Conference (APEC) today. We will be demonstrating a unique design that minimizes the X-Y area on the board by placing the inductor on top of the IC, with a gap in between.
Missing APEC this year? Then check out this video, “How to create a PMBus inductor-on-top buck converter design” and take a look at our new PMBus Power Solutions Guide. Also, read “Synchronous Buck Converter Delivers 12 A With Fast Load Step Response” in Power Electronics magazine for more information about TI’s new TPS53915 synchronous-buck converter and “PMBus Gives Designers New Options for Meeting Adaptive Voltage Scaling Requirements” in How2Power.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.