Design method and circuit of a serial port multi-stage charging and discharging power supply

A charging and discharging power supply, charging power supply technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of affecting circuit start-up, long charging time, and inability to obtain power from serial ports, etc., to achieve improved efficiency, improved performance, and low power consumption Effect

Active Publication Date: 2021-09-07
深圳艾迪宝智能系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. For single-stage charging with only a few milliamps of micro-current provided by the TxD signal terminal similar to RS232, if the storage capacitor is too small, the power supply for high-current pulse applications cannot be realized; if the storage capacitor If it is too large, it will affect the start-up of the circuit due to the long charging time
[0011] 3. When doing RS232 communication based on the 3-wire system, since there are no RTS and DTR leads, the serial port cannot be powered

Method used

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  • Design method and circuit of a serial port multi-stage charging and discharging power supply
  • Design method and circuit of a serial port multi-stage charging and discharging power supply
  • Design method and circuit of a serial port multi-stage charging and discharging power supply

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Embodiment 1

[0115] Embodiment 1: A secondary power supply based on the TxD terminal of RS232

[0116] 1. Structure Description

[0117] figure 1 It is a schematic diagram of the multi-stage charging and discharging power supply of the present invention.

[0118] Among them, 101 is the charging circuit, that is, the serial port power-taking circuit, its input is the output terminal of the serial port, and the voltage is U 01 , unipolar or positive and negative bipolar pulses. The output voltage is DC V0, which is sent to circuit 1 and circuit 2 for charging. Circuit 1 outputs regulated voltage V1 from P3, and outputs switching signal K1 from P5 to control circuit 2. Before the charging of capacitor C1 of circuit 1 is completed, K1=0, and the charging of circuit 2 is turned off. After C1 is charged, P3 terminal When the stable voltage value V1 is reached, K1=1 at this time, the charging of the circuit 2 is started. Circuit 2 outputs V2 from P8 as the backup voltage of circuit 1, which ...

Embodiment 2

[0207] Embodiment 2: Three-level power supply based on RS232 TxD terminal with long-life battery

[0208] This embodiment is another application of the present invention—a three-stage power supply based on the RS232 TxD terminal with a long-life battery. Compared with the previous embodiment, the similarities will not be repeated, and the differences are:

[0209] image 3 is a structural diagram of this embodiment.

[0210] In this embodiment, a three-level power supply is used, and the introduction of such image 3 In the circuit 3 of 303, in addition, a long-life battery of 309 is introduced, and the long-life battery includes a non-rechargeable battery and a rechargeable battery. The specific differences are as follows:

[0211] In terms of specific design methods:

[0212] 1. Including but not limited to third-pole power supply.

[0213] Such as image 3 In the circuit 3, its PA terminal accepts the charging of V0, and the output voltage V3 generated is sent to the ...

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Abstract

A design method and circuit for a serial port multi-stage charging and discharging power supply. The method and circuit are designed to charge a dedicated multi-stage charging and discharging circuit by taking power from the micro-current signal source of the serial port to obtain a power supply powered by an instantaneous large current. Under the premise of not affecting the quality of signal communication, solve the problem of self-power supply based on serial port. The micro-signal source includes a 3-wire system that takes power from the TxD terminal of the RS232 port, and obtains charging power through bidirectional rectification and filtering and charge pump reverse polarity. The first-stage power supply is the main power supply, and the second-stage power supply is the backup power supply. , the main power supply is supported by the backup power supply, so that the method and the circuit meet the extreme power supply requirements in the following cases when the power supply current does not exceed 5mA: support Bluetooth devices at +8dB radio transmission, instantaneous current 20mA, communication distance Up to 300 meters, send data every 4 seconds, and the data length supports 255 bytes. In addition, as an option, a long-life battery micro-current power supply is also used to provide display and connector validity monitoring for up to 9.5 years in storage.

Description

technical field [0001] The invention relates to the field of information technology, in particular to the field of intelligent equipment and sensor networks, especially the subdivision field of low-power self-powered serial communication equipment. Background technique [0002] According to the inventor's search and research on the existing research results in the industry, it is found as follows: [0003] Application number 201410054366.7, "A self-powered RS232 and infrared communication interface conversion circuit", proposes to use the DTR and TxD signal terminals of RS232 to supply power for the infrared 38KHz transmission circuit. In fact, since the maximum output current of DTR is 60mA. TxD is used to send data, and can only provide a current below 6mA without affecting data transmission. At the same time, there is no DTR terminal in the 3-wire RS232 port, and no multi-level power supply design is adopted, so this application does not have obvious advantages in the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
CPCG06F13/4068G06F2213/0002
Inventor 丁贤根
Owner 深圳艾迪宝智能系统有限公司
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