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Multi-output direct current-direct current converter with power-on timing sequence controllable

A DC converter, multi-output technology, applied in the output power conversion device, regulating electrical variables, converting DC power input to DC power output, etc., to achieve the effect of simple and reliable circuit and fewer components

Active Publication Date: 2015-02-18
SHENZHEN ACAD OF AEROSPACE TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low voltage stabilization accuracy and difficult control of power-on sequence in previous multi-output DC / DC converters, the present invention proposes a One-way output DC / DC DC converter switching power supply, with the advantages of independent and precise voltage regulation of each output voltage, and controllable power-on sequence of output voltage

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  • Multi-output direct current-direct current converter with power-on timing sequence controllable
  • Multi-output direct current-direct current converter with power-on timing sequence controllable
  • Multi-output direct current-direct current converter with power-on timing sequence controllable

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] as attached figure 1 , the multi-output DC-DC converter with controllable power-on sequence of the present invention can be divided into three parts, and the circuits of the three parts are connected in cascaded form: the first part is a pre-stage DC / DC converter controlled by a single PWM control chip. DC converter topology circuit, its function is to convert the input voltage into multiple output pre-stage voltage 1 to pre-stage voltage n isolated from it. The front-stage voltage 1 is also the main output voltage. The front-stage DC / DC converter topology circuit samples the front-stage voltage 1 and completes the closed-loop control, so that the stability of the front-stage voltage 1 reaches 1%, and the output voltage of this channel is the most built first. The front-stage DC / DC converter topology circuit using a single PWM control...

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Abstract

The invention provides a topology of a multi-output DC / DC converter switching power supply with a power-on timing sequence controllable, aiming at solving the problems of low voltage stabilization precision and difficulty in power-on timing sequence control of conventional multi-output DC / DC converters. The multi-output DC / DC converter switching power supply has the advantages of independent and precise stabilization of each output voltage, output voltage power-on timing sequence controllability, simplicity and reliability in circuit, fewer components and parts, capability of being applied to electric equipment with high requirements on output voltage precision and the power-on timing sequence and the like.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a multi-output DC-DC converter capable of controlling the power-on sequence of output voltages. Background technique [0002] Current electronic equipment has increasingly stringent requirements on the power supply quality of switching power supplies. For example, for multi-output power supplies, the output voltage of each channel is often required to reach a stability of 1%. At the same time, there are also clear requirements for the power-on sequence of the output voltage. For example, for a +3.3V, 5V and ±12V four-way output power supply system, it is required that the +3.3V core power supply voltage should be started first, followed by the -12V power supply voltage. , and then +5V and +12V were started one after another. [0003] Patent Document 1 (Chinese Patent Publication No.: CN101521460A, a multi-output DC-DC converter) is applied to high-power output occasions,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00
Inventor 佟强王磊王晨
Owner SHENZHEN ACAD OF AEROSPACE TECH
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