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

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

Active Publication Date: 2018-01-30
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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  • A multi-channel power supply power-on sequence control circuit and method
  • A multi-channel power supply power-on sequence control circuit and method
  • A multi-channel power supply power-on sequence control circuit and method

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Embodiment Construction

[0041] In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the following description and drawings are relevant to the present invention. The invention is exemplary and should not be construed as limiting the invention. The following description describes many specific details to facilitate the understanding of the present invention. However, in some instances, well-known or conventional details are not described to meet the requirements of concise description.

[0042] For the convenience of description, all the following embodiments take the power supply chip with a first power supply with a working voltage of 3.3V, a second power supply with a working voltage of 1.1V, and a third power supply with a working voltage of 1.8V as examples. Before the power-on reaches 10%, the fir...

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Abstract

The present invention provides a multi-channel power supply sequence control circuit, a multi-channel power supply sequence control circuit, including a first power supply, a second power supply, a third power supply, a reference voltage, and a voltage comparator; the first The power supply is converted to generate the second power supply that changes in the same direction as the first power supply voltage in a specific relationship; the non-inverting input terminal of the voltage comparator is connected to the second power supply, and the inverting input terminal of the voltage comparator The reference voltage is connected, and the output of the voltage comparator is used as an enabling signal for turning on the third power supply.

Description

Technical field [0001] The present invention relates to the field of power-on sequence control, and more specifically to a circuit, method and device for accurately controlling the power-on sequence of chip multi-channel power supplies. Background technique [0002] At present, in the design of electronic products, product functions and designs are becoming more and more complex, circuit integration is getting higher and higher, and 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 power-on sequence. For example, a power supply chip has a power supply of 3.3V, 1.8V, 1.1V, and it is required that 1.1V and 3.3 are required before the 1.8V power supply reaches 10%. 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36
Inventor 王亦鸾
Owner ZHONGTIAN BROADBAND TECH
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