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

A technology of charging and discharging power supply and charging power supply, which is applied in the direction of electrical digital data processing, instruments, etc., can solve the problems such as the inability to realize the power supply of high-current pulse applications, affecting the startup of the circuit, and the inability to realize the serial port power acquisition.

Active Publication Date: 2019-08-16
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 startup 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 serial port multi-stage charging and discharging power supply
  • Design method and circuit of serial port multi-stage charging and discharging power supply
  • Design method and circuit of 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

The invention relates to a design method and circuit for a serial port multi-stage charging and discharging power supply, and the method and circuit obtain a power supply for instantaneous large-current power supply through the design of taking power from a micro-current signal source of a serial port to charge a special multistage charging and discharging circuit, and solve a self-power-supply problem based on the serial port on the premise that the signal communication quality is not influenced. The micro-signal source comprises a TxD terminal which supports a three-wire system and takes power from an RS232 port. A charging power supply is obtained through bidirectional rectification filtering and charge pump reverse polarity; the first-stage power supply is a primary power supply, the second-stage power supply is a backup power supply; a backup power supply is used as a main power supply support; under the condition that the power taking current does not exceed 5mA, the method and the circuit meet the extreme power supply requirements under the following conditions: the Bluetooth equipment is supported to perform + 8dB radio emission, the instantaneous current is 20mA, the communication distance reaches 300m, the data is sent once every four seconds, and the data length is supported to be 255 bytes. In addition, as an option, a long-service-life battery micro-current is adopted for power supply, and display and connector assembly effectiveness monitoring which can be as long as 9.5 years in a storage state can be provided.

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, in the 3-wire RS232 port, there is no DTR terminal, and no multi-level power supply design is adopted, so this application does not have obvious advantages in the ...

Claims

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Application Information

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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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