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Smart Power Management Partitioning for CPU power supply

IP.com Disclosure Number: IPCOM000146940D
Published in the IP.com Journal: Volume 7 Issue 3A (2007-03-25)
Included in the Prior Art Database: 2007-Mar-25
Document File: 2 page(s) / 24K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The main Voltage Regulator (VR) of a Central Processing Unit (CPU) power management is usually a step down converter and can be split into a controller, a power stage and a filter (Figure 1). The power stage is usually split in several parts, each consisting of a driving stage, power switches and an inductor. All of these power branches are connected together for supplying the CPU. At present, generating the power supply for a CPU is solved by employing dedicated chips or chipsets which implement controller and driver functions. The controller and the driver can be integrated in one or several chips in different ways. This depends on the vendor as well as on the function partitioning. For example, the driver can just incorporate the pure driving stages or it can also include some smart functions like current sensing or temperature sensing. A typical application partitioning is depicted in Figure 2. For the regulating loop implemented by the controller, the CPU power management is provided with analog signal conditioning.

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Smart Power Management Partitioning for CPU power supply

Idea: Dr. Guiseppe Bernacchia, IT-Padua; Giovanni Capodivacca, IT-Padua

The main Voltage Regulator (VR) of a Central Processing Unit (CPU) power management is usually a step down converter and can be split into a controller, a power stage and a filter (Figure 1). The power stage is usually split in several parts, each consisting of a driving stage, power switches and an inductor. All of these power branches are connected together for supplying the CPU.

At present, generating the power supply for a CPU is solved by employing dedicated chips or chipsets which implement controller and driver functions. The controller and the driver can be integrated in one or several chips in different ways. This depends on the vendor as well as on the function partitioning. For example, the driver can just incorporate the pure driving stages or it can also include some smart functions like current sensing or temperature sensing. A typical application partitioning is depicted in Figure 2. For the regulating loop implemented by the controller, the CPU power management is provided with analog signal conditioning.

A novel solution is presented in the following in order provide a better partitioning for the main VR. To this end, a digital control loop can be realized and everything but the driving stage...