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Power on sequence control circuit on multi-channel power supply and method

A multi-channel power supply and sequence control technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of no output normal indication pins, etc., and achieve the effect of simple and convenient circuit design, simple circuit structure and excellent effect

Active Publication Date: 2015-10-28
ZHONGTIAN BROADBAND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, many circuit modules do not output normal indication pins, and the power-on sequence control of the chip cannot be realized through the above-mentioned scheme.

Method used

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  • Power on sequence control circuit on multi-channel power supply and method
  • Power on sequence control circuit on multi-channel power supply and method
  • Power on sequence control circuit on multi-channel power supply and method

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Embodiment Construction

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. The invention is exemplary and should not be construed as limiting the invention. The following description describes numerous specific details to facilitate an understanding of the present invention. However, in certain instances, well-known or conventional details are not described in order to satisfy the requirement of conciseness of the description.

[0042] For the convenience of description, all the following embodiments take the power supply chip with the first power supply with a working voltage of 3.3V, the second power supply with a working voltage of 1.1V, and the third power supply with a working voltage of 1.8V as examples. The first power supply and the second power supply must be powered up to 90% bef...

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Abstract

The invention provides a power on sequence control circuit on a multi-channel power supply. The power on sequence control circuit on the multi-channel power supply comprises a first power supply, a second power supply, a third power supply, reference voltage and a voltage comparator. The first power supply produces the second power supply through conversion, wherein the second power supply carries out in-phase change with the first power supply voltage in a specific relationship. The in-phase input end of the voltage comparator is connected with the second power supply. The anti-phase input end of the voltage comparator is connected with the reference voltage. The output of the voltage comparator is used as an enable signal which switches on the third power supply.

Description

technical field [0001] The invention relates to the field of power-on sequence control, and more particularly relates to a circuit, method and device for precisely controlling the power-on sequence of chip multi-channel power supplies. Background technique [0002] At present, in the design of electronic products, the functions and designs of products are becoming more and more complex, the degree of circuit integration is getting higher and higher, and the power consumption is increasing. In most cases, ASIC chips need to provide multiple different power sources, and these The power supplies are required to be powered on in a certain order. For example, a power supply chip has power supplies of 3.3V, 1.8V, and 1.1V. It is required that the 1.1V and 3.3 The V power supply must be powered up to 90%. In order to meet the above power supply requirements, a dedicated power-on sequence control chip is generally used in existing solutions. However, the dedicated power-on sequence ...

Claims

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Application Information

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IPC IPC(8): H02M1/36
Inventor 王亦鸾
Owner ZHONGTIAN BROADBAND TECH
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