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An interleaved parallel switching power supply and its control method

A switching power supply, parallel technology, applied to electrical components, conversion equipment without intermediate conversion to AC, output power conversion devices, etc., can solve problems such as poor dynamic response and cumbersome compensation design

Active Publication Date: 2017-05-24
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The out-of-phase control of the interleaved parallel switching power supply in the prior art usually adopts the fixed-frequency control method, such as using a fixed out-of-phase clock signal to make the two main switching tubes conduct in the out-of-phase, but its dynamic response is poor, and the compensation design is relatively poor. cumbersome

Method used

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  • An interleaved parallel switching power supply and its control method
  • An interleaved parallel switching power supply and its control method
  • An interleaved parallel switching power supply and its control method

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Embodiment Construction

[0050] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0051] refer to figure 2Shown is a circuit block diagram of an interleaved parallel switching power supply according to the present invention. In an embodiment of the present invention, the interleaved parallel switching power supply includes two parallel step-down power stage circuits, but is not limited thereto. The switch The power s...

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Abstract

The invention discloses an interleaved parallel switching power supply and a control method thereof. An AC ripple signal is generated according to a switch control signal of a multi-channel power stage circuit, and then the AC ripple signal and an output voltage feedback signal are superimposed, and the superimposed signal is After comparing with the reference voltage signal, the frequency division is used to obtain the conduction signal of each power stage circuit. The phase difference of each conduction signal after frequency division is a certain phase angle, which can make the main switch tubes of each channel conduct in a wrong phase. The parallel interleaved switching power supply of the invention has accurate phase error, fast response and good effect.

Description

technical field [0001] The invention relates to the field of switching power supplies, more specifically, to an interleaved parallel switching power supply and a control method thereof. Background technique [0002] In the switching power supply, in order to increase the power density of the power supply and reduce the output voltage ripple, the main circuit of the power supply often adopts an interleaved parallel connection. Such as figure 1 Shown is an implementation of the interleaved parallel switching power supply in the prior art. The first main switching tube Q1 and the second main switching tube Q2 in the two-way Buck circuit in the interleaving parallel connection are turned on at 180° out of phase, and the inductance current i L1 and i L2 The ripples cancel each other out, so that the output current frequency is doubled, the output current ripple is greatly reduced, and the output voltage ripple is also greatly reduced, so the two-way Buck circuit in interleaved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
CPCH02M3/10H02M3/1584H02M3/1586H02M1/14H02M1/0025
Inventor 蔡勇斌陈圣军
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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