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Control apparatus and method for thermal balancing in multiphase DC-DC converters

A technology of DC-DC and converters, applied in the field of multi-phase DC-DC converters, which can solve problems such as the complexity of multi-phase conversion systems

Inactive Publication Date: 2015-07-22
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, attempts to maximize individual phase efficiency through uneven load sharing do not address the cause of the underlying parameter variation problem and introduce unnecessary complexity in the operation of multiphase conversion systems

Method used

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  • Control apparatus and method for thermal balancing in multiphase DC-DC converters
  • Control apparatus and method for thermal balancing in multiphase DC-DC converters
  • Control apparatus and method for thermal balancing in multiphase DC-DC converters

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Embodiment Construction

[0018] One or more embodiments or implementations are described below with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout, and wherein the various features are not necessarily drawn to scale. The present invention provides intelligent management of the sequencing of converter phases in a multi-phase DC-DC converter to facilitate more even thermal load sharing. figure 1 and 2 The diagram illustrates a set of four DC-DC converter phases 4-1, 4-2, 4-3, and 4-4 (labeled "DC-DCφ1", "DC-DCφ2", "DC-DCφ3" and "DC-DCφ4") and exemplary multi-phase power to controller 16 providing pulse width modulated (PWM) control signals 14-1, 14-2, 14-3, and 14-4 to individual converter phase 4 Conversion system 2. Furthermore, as illustrated, the outputs of the individual DC-DC converter phase 4 are connected to each other such that the output currents I-1, I-2, I-3 and I-4 contribute additively across the optional output capacitor C OUT P...

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Abstract

Integrated circuit apparatus and processes are presented for controlling a plurality of parallel-connected DC-DC converter phases forming a multiphase DC-DC conversion system in which individual converter phases are successively activated or deactivated for increasing and decreasing load conditions, respectively, according to an ordered phase sequence, and the phase sequence is selectively modified to promote thermal balancing of the DC-DC converter phases.

Description

technical field [0001] The present invention relates to multi-phase DC-DC converters having multiple converter stages or phases providing a single DC output to drive a load. Background technique [0002] DC-DC converters exist in many different forms and include switches that are selectively actuated to provide a controlled DC output voltage or current based on a received DC input, where the pulse width or The on-time is controlled to regulate output power. A variety of pulse width modulation (PWM) techniques can be used to operate DC-DC converter switches, including fixed frequency operation with adjustments to the duty cycle of the switching control signal, between pulses to stabilize the "on time" by adjusting The so-called "off-time" of the constant on-time (COT) method of regulating the output of the converter and the variable frequency control technique using a constant duty cycle, etc. A multi-level or multi-phase conversion system employs two or more DC-DC converte...

Claims

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Application Information

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IPC IPC(8): H02M3/156
CPCH02M1/32H02M3/1584H02M2001/327H02M3/155H02M3/157H02M1/327
Inventor 普拉迪普·S·谢诺伊迈克尔·迪伦佐
Owner TEXAS INSTR INC
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