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The multiphase controllers support the latest PMBus 1.3 specifications. This includes the adaptive voltage scaling bus, known as AVSBus. The AVSBus is an “open standard” defined by the System Management Interface Forum, for the purpose of adaptive voltage scaling for Non-x86 processor solutions. The Renesas multiphase controller family offers good design flexibility, due to the nature of being a full digital implementation. The user has the ability to configure outputs and assign any number of phases across both or single outputs. The truth tables on this slide capture just some of the different permutations of phase assignments that are available with this full digital implementation. For example, depending on the power solution need, a user could adopt a 4-phase controller and assign all phases to a single output, namely 4+0, or spread phase assignment in any combination up to four phases across both outputs, all configurable using PowerNavigator software and with zero external components.

PTM Published on: 2017-10-11