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ST confirms commitment to PMBus forum

Posted: 12 Sep 2006 ?? ?Print Version ?Bookmark and Share

Keywords:STMicroelectronics? ST? Power Management Bus PMBus Implementers Forum? PMBus?

STMicroelectronics (ST) announced its membership in the Power Management Bus (PMBus) Implementers Forum as a PMBus Adopter.

As a PMBus Adopter, the company is now able to offer designers compliant devices for new systems. Already the company has a broad family of MCUs that are ideal for power-system control, and also ships pulse-width modulation (PWM) controllers for point-of-load applications in high volumes.

"New devices based on the PMBus protocol, which we will be announcing shortly, will expand ST's presence in this market. With our broad portfolio of semiconductor production processes, we are well positioned to offer value-added products based on the PMBus standard," said Pietro Menniti, general manager of ST's industrial and power conversion division.

The need for a standard protocol for power communication has arisen with the growth of digitally controlled power subsystems. The I2C-based System Management Bus (SMBus) has been used for several years to manage batteries, chargers, and backlight systems, and has been considered an ideal basis for the PMBus. The PMBus uses SMBus as its physical communication layer and includes support for the SMBus Alert as well as an optional Control line. Version 1.0 of the PMBus specification was published in March 2005.

The PMBus protocol is a collaboration among key players in the industry to establish an open communications standardoperating over the industry-standard SMBus interfacethat facilitates programming, digital control, and real-time monitoring of power conversion systems without the need to burden the host system with multiple protocols.

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