AN2013 1-888-INTERSIL ZL2005 ZL2105 ZL2005P ZL2004 ZL2006 2N3904 ZL200B AN2016

May 04, 2009 Application Note AN2013.0 Introduction Digital power, the latest evolution in power conversion technology, evokes

Zilker Labs PMBus Command Set May 04, 2009 Application Note AN2013 AN2013.0 Introduction Digital power, the latest evolution in power conversion technology, evokes many different ideas concerning the use of digital technology in power supply systems. Digital power design should ultimately allow for monitoring, dynamic optimization of operating points and increased efficiency while reducing the number of external components. Transport and Electrical Interface specifies the physical interface to the PMBus. It includes the SMBus serial bus as the electrical interface and protocol. The second part, PMBus Power System Management Protocol Specification; Part II Command Language, describes the command set. This command set includes provision for manufacturer specifiable commands and data. The power industry required a digital power supply communication standard to move ahead into digital power design. The System Management Interface (SMI) Forum and the Power Management Bus Implementers Forum created a hardware interface and a command language to deal with standardization of this communication interface. This Power Management Bus (PMBus) command language standard is a comprehensive set of commands used with the industry-standard SMBus to enhance the control and monitoring of digital power circuits and thermal management. The PMBus specification is written in two parts. The first, PMBus Power System Management Protocol Specification; Part I - General Requirements, Zilker Labs' Digital-DCTM based ICs feature the implementation of PMBus in an efficient power supply controller device. This document describes the standard PMBus commands available in Zilker Labs' devices. The manufacturer-specific commands are also described in this document. Each command description includes the parameters defined by Zilker Labs that are necessary for its use. This document should be used in conjunction with the PMBus specification documents standard command description and Zilker Labs application notes. The commands in this document are grouped in functional chapters in similar fashion to the PMBus Power System Management Protocol Specification; Part II. Each PMBus command is described in the following format: 1.x.x Devices: Command Code: Data Length in Bytes: Data Format: Factory Value: Units: Type: Reference: Definition: