Multi-phase switching voltage regulator having asymmetric phase inductance

A voltage regulator, multi-phase switch technology, applied in the direction of regulating electrical variables, control/regulation systems, high-efficiency power electronic conversion, etc.

Inactive Publication Date: 2016-08-17
INFINEON TECH AUSTRIA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inductance value is limited to support high phase current

Method used

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  • Multi-phase switching voltage regulator having asymmetric phase inductance
  • Multi-phase switching voltage regulator having asymmetric phase inductance
  • Multi-phase switching voltage regulator having asymmetric phase inductance

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Embodiment Construction

[0013] Embodiments of the multi-phase switching voltage regulator described herein provide at least one phase (power stage) with a different inductance value than the other phases. The terms "phase" and "power stage" are used interchangeably herein to describe the output components (e.g., driver circuits, high-side and low-side transistors, inductors, etc.) of a multiphase switching voltage regulator, each of which Contributes a portion of the total current delivered to the load under regulation. In some cases, one phase has a different inductance value than the other phases. In other cases, two or more phases have different inductance values ​​than other phases. In still other cases, all phases have different inductance values. In each case, higher inductance values, e.g. up to 2 times the nominal inductance for the other phases or higher, can be applied to always operate as a single phase in the power saving mode(s) Or a phase that operates in combination with another pha...

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PUM

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Abstract

A multi-phase switching voltage regulator having asymmetric phase inductance includes a controller and a plurality of power stages each configured to deliver output current to a load through an inductor. At least one of the inductors has a higher open circuit inductance than the other inductors so that at least one of the power stages has a different output inductance compared to the other power stages. The controller is configured to control switching of the power stages so as to regulate an output voltage of the multi-phase switching voltage regulator, including allowing all of the power stages to provide current to the load through the respective inductors during a full power event at the load and preventing all of the power stages except for the at least one power stage having the higher open circuit inductance from providing current to the load during a low power event at the load.

Description

technical field [0001] The present application relates to multiphase switching voltage regulators, in particular multiphase switching voltage regulators with asymmetrical phase inductances. Background technique [0002] Switching voltage regulators are widely used in modern electronic systems and applications for a variety of applications such as computing (server and mobile) due to their high efficiency and the small amount of area / volume consumed by such converters. In Telecom's POL (Point of Load System). Widely accepted switching voltage regulator topologies include buck, boost, buck-boost, forward, flyback, half-bridge, full-bridge, and SEPIC topologies. Multiphase buck converters are particularly well-suited for delivering high current at low voltages required by high-performance integrated circuits such as microprocessors, graphics processors, and network processors. A buck converter utilizes such as a pulse width modulation (PWM) controller IC (Integrated Circuit),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/00
CPCH02M3/1584H02M1/15H02M1/0032Y02B70/10
Inventor E·托德罗夫B·唐
Owner INFINEON TECH AUSTRIA AG
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