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Multiphase switching power supply with improved efficiency and computer system with same

A switching and power supply technology, applied in the power supply field, can solve problems such as low efficiency

Inactive Publication Date: 2006-07-12
GLOBALFOUNDRIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because less current is used during low power state operation, switching becomes less efficient for the percentage of total current produced

Method used

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  • Multiphase switching power supply with improved efficiency and computer system with same
  • Multiphase switching power supply with improved efficiency and computer system with same
  • Multiphase switching power supply with improved efficiency and computer system with same

Examples

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Embodiment Construction

[0024] figure 1 A specific embodiment of a multiphase power supply 100 is shown. Multiphase power supply 100 includes a plurality of synchronous switching stabilizers, labeled 110A, 110B, 110C, and 110D. The synchronous switch stabilizers 110A-D may be referred to as a switch stabilizer 110 individually or as a whole. Switching regulator 110 is coupled to provide power to microprocessor 160 at node 170 . The multiphase power supply 100 further includes a phase control circuit 150 coupled to each switching stabilizer 110 . It is important to note that different embodiments may include more or less than 4 switching stabilizers.

[0025] In the depicted embodiment, each switching regulator 110 includes a pair of transistors (eg, transistors 101 and 102, transistors 111 and 112, etc.) coupled between a power supply terminal Vcc and ground. Each switching stabilizer 110 further includes diodes (such as diodes 103, 113, etc.), inductors (such as inductors 104, 114, etc.), and ca...

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PUM

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Abstract

A multiphase power supply that minimizes losses during a low power mode+. In a particular embodiment, a multiphase power supply may include a plurality of switching regulators coupled in parallel with respect to one another. The multiphase power supply further comprises a phase control circuit coupled to each of the switching regulators. The phase control circuit is configured to generate a plurality of control signals for controlling the switching of the switching regulators so that they are out of phase with respect to one another. During the low power mode of operation of the microprocessor, the phase control circuit is configured to selectively suspend operation of a subset of switching regulators by removing or disabling at least one of the plurality of control signals to each of the subset of switching regulators.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a multiphase switching power supply (switching power supply). Background technique [0002] A variety of different types of devices use power sources. There are many specific types of power circuits, each with different advantages and disadvantages. Microprocessors in computers may require power circuits that can regulate current significantly while maintaining high levels of efficiency. [0003] One specific power supply circuit of this type is a switching regulator. Switching stabilizers generally provide an output with a lower voltage than the unregulated input, while simultaneously providing an output with a higher current than the input current from the unregulated power supply. This is accomplished by passive transistors constantly switching between saturated and non-saturated states. Because passive transistors have very low power dissipation in saturated or non-conductiv...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M3/155G05F1/40
CPCY02B70/16H02M3/1588H02M2003/1586H02M2001/0032H02M3/1584Y02B70/1466Y02B70/10H02M1/0032H02M3/1586H02M3/158
Inventor C·特雷斯勒C·埃尔南德斯M·陈
Owner GLOBALFOUNDRIES INC
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