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Circuit for realizing phase interleaving of multi-path DC/DC (Direct Current/Direct Current) converter

A DC converter and circuit technology, applied in the field of multi-channel DC/DC converter circuits, can solve the problems of increased EMI interference, large output current, etc., and achieve the requirements of reducing capacitance, realizing performance and cost, and realizing phase interleaving Effect

Pending Publication Date: 2022-05-27
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the large-scale application of multi-channel DC / DC converters, the output current of DC / DC converters is getting larger and larger, and the EMI interference is correspondingly larger

Method used

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  • Circuit for realizing phase interleaving of multi-path DC/DC (Direct Current/Direct Current) converter
  • Circuit for realizing phase interleaving of multi-path DC/DC (Direct Current/Direct Current) converter
  • Circuit for realizing phase interleaving of multi-path DC/DC (Direct Current/Direct Current) converter

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Embodiment Construction

[0020] The technical solutions and effects of the present invention are further described in detail below.

[0021] A circuit for realizing phase interleaving of multi-channel DC / DC converters, comprising a single-chip microcomputer, an RC circuit and a plurality of DC / DC converters, wherein the single-chip microcomputer has a PWM module;

[0022] The single-chip microcomputer generates 4 accurate phase signals of 0°, 90°, 180°, and 270° through the PWM module. Each signal is delayed by the RC circuit, and the signals with different time delays are sent to different DC / DC conversions. device.

[0023] The circuit adopts the PWM module inside the widely used single-chip microcomputer to realize the intelligent control of the multi-channel DC / DC power converter. Afterwards, the delay function is realized by a simple RC circuit and sent to different DC / DC converters respectively. By setting different RC circuits, the circuit can generate 12-channel phase-interleaved clocks to 1...

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Abstract

The invention provides a circuit for realizing multi-path DC / DC converter phase interleaving. The circuit adopts a PWM module in a single-chip microcomputer to realize intelligent control of multipath DC / DC power supply converters, the single-chip microcomputer firstly generates four paths of accurate phase interlaces, then realizes a time delay function through a simple RC circuit, and sends the phase interlaces to different DC / DC converters respectively. By setting different RC circuits, the circuit can generate 12 paths of phase-staggered clocks to 12 paths of DC / DC converters or generate 8 paths of phase-staggered clocks to 8 paths of DC / DC converters, thereby realizing phase staggering of multiple paths of DC / DC converters. The circuit is simple in structure, can reduce the capacitance value requirement of an input capacitor, reduces the electromagnetic interference of a DC / DC circuit, and is low in implementation cost. Meanwhile, the four paths of accurate phase staggering are combined with other eight paths or four paths of inaccurate phases, so that the balance between the performance and the cost is realized.

Description

technical field [0001] The invention relates to a multi-channel DC / DC converter circuit in an industrial control and communication system, in particular to a multi-channel DC / DC converter phase interleaving circuit in a wireless communication system. Background technique [0002] Current processors, graphics and storage systems use multiple DC / DC power solutions. With the large-scale application of multi-channel DC / DC converters, the output current of the DC / DC converter is getting larger and larger, and the EMI interference is correspondingly larger. In addition, when a multi-channel DC / DC converter switches synchronously, it will increase the demand for the input current of the DC / DC converter, especially in high current application scenarios. [0003] At present, in a system that requires a single-chip microcomputer to achieve board-level management, the DC / DC converter is required to output low voltage and high current. At the same time, in order to avoid voltage ripple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M1/44H02M1/14
CPCH02M3/00H02M1/44H02M1/14Y02B70/10
Inventor 张思洁许书彬周庆明杨哲欣俞春祥张静苏波赵静
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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