A multi-stage multi-output power management circuit

A power management and multi-output technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems that circuits cannot meet multi-voltage power supply, environmental noise, etc., and achieve ultra-low voltage power supply and avoid environmental noise Effect

Inactive Publication Date: 2016-04-13
GUANGZHOU SYSUR MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power supply design at the PCB board level is easy to introduce environmental noise, and additional pins are required for isolated power supply of multiple voltage domains
Therefore, it is necessary to implement multi-voltage power supply inside the chip, and the existing circuit cannot meet the needs of multi-voltage power supply

Method used

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  • A multi-stage multi-output power management circuit
  • A multi-stage multi-output power management circuit
  • A multi-stage multi-output power management circuit

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] figure 1 It is a schematic diagram of the structural composition of the multi-stage multi-output power management circuit of the embodiment of the present invention, as shown in figure 1 As shown, the management circuit includes:

[0029] The DC-DC module 1 is used to output the first-level power supply voltage, and output the first-level power supply voltage to provide the primary power supply for the second-level voltage stabilizing module;

[0030] The ...

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Abstract

The embodiment of the invention discloses a multistage multiple output power management circuit. The management circuit comprises a DC-DC module, a second stage voltage stabilization module and a third stage power supply module, wherein the DC-DC module is used for outputting a first stage power supply voltage, and a primary power supply source is provided for the second stage voltage stabilization module through the outputting of the first stage power supply voltage; the second stage voltage stabilization module is used for receiving the first stage power supply voltage and outputting a second stage power supply voltage; the third stage power supply module is used for receiving the second stage power supply voltage and outputting voltage supply and power supply. According to the embodiment of the multistage multiple output power management circuit, no extra pins used for isolation power supply of multiple voltage domains are needed to be provided, on the basis of a normal power supply voltage, multiple models in a reader support low power consumption model of ultra-low power supply, the ultra-low voltage power supply is achieved, and environment noise is avoided being introduced into in the power supply process.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification (Radio Frequency Identification, RFID) reader power management, in particular to a multi-stage multi-output power management circuit. Background technique [0002] RFID technology is a non-contact automatic identification technology, which transmits signals through electromagnetic waves or inductive coupling to complete automatic identification of target objects. Radio signals transmit data from a tag attached to an item through an electromagnetic field tuned to a radio frequency to automatically identify and track the item. Some tags can get energy from the electromagnetic field emitted by the identifier during identification, and do not need batteries; there are also tags that have their own power supply and can actively emit radio waves (electromagnetic fields tuned to radio frequencies). Tags contain electronically stored information and can be identified within a few m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
Inventor 胡建国段志奎王德明吴劲丁一李启文
Owner GUANGZHOU SYSUR MICROELECTRONICS
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