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Communication isolation and level switching circuit

A technology for converting circuits and levels, applied in the directions of failsafe circuits, logic circuit interface devices, logic circuit connection/interface layout, etc. and other problems, to achieve the effect of preventing damage to the battery, realizing communication isolation and level conversion, and solving the communication function

Pending Publication Date: 2017-05-24
SUNWODA ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current application of smart batteries, it is necessary to realize the communication between the battery and the host, and serial port communication is often used. The same, so it cannot be directly connected for communication, but needs to be transferred through level conversion and isolation circuits. In the prior art, the efficiency of communication isolation and level conversion circuits is not high and relatively complicated

Method used

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Embodiment Construction

[0024] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] refer to Figure 1-3 , a communication isolation and level conversion circuit, respectively connected to the battery 10 and the host 20, which includes a first branch 30 and a second branch 40; the first branch 30 includes a diode D1, a pull-up resistor R1, a pull-up The resistor R3 and the anode of the diode D1 are electrically connected to the data receiving end of the battery 10, the cathode of the diode D1 is electrically connected to the data sending end of the host computer 20, and one end of the pull-up resistor R1 is respectively connected to the data receiving end of the battery 10 and the anode of the diode D1. The other end is connected to a 3.3V voltage, one end of the pull-up resistor R3 is respectively connected to the data sending end of the host computer 20 and the cathode of the diode D1, and t...

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Abstract

The invention discloses a communication isolation and level switching circuit. The communication isolation and level switching circuit is separately connected with a battery and a host, and comprises a first branch and a second branch; the first branch comprises a diode D1, a pull-up resistor R1 and a pull-up resistor R3; and the second branch comprises an audion Q1, an audion Q2, a pull-up resistor R8 and a pull-up resistor R10. By means of the communication isolation and level switching circuit disclosed by the invention, the communication function between MCUs having different power supply voltage can be solved; and the problem that the battery can be damaged due to the fact that high voltage of the host is supplied to the battery when the host is abnormal can be prevented.

Description

technical field [0001] The invention relates to the field of communication isolation and level conversion, in particular to a communication isolation and level conversion circuit. Background technique [0002] In the current application of smart batteries, it is necessary to realize the communication between the battery and the host, and serial port communication is often used. The same, so it cannot be directly connected for communication, but needs to be transferred through a level conversion and isolation circuit. In the prior art, the communication isolation and level conversion circuit is not efficient and relatively complicated. Contents of the invention [0003] The main purpose of the present invention is to provide a simple and efficient communication isolation and level conversion circuit. [0004] The present invention proposes a communication isolation and level conversion circuit, which is respectively connected to the battery and the host, and includes a fir...

Claims

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Application Information

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IPC IPC(8): H03K19/0175H03K19/007
CPCH03K19/007H03K19/017509H03K19/01759Y02E60/10
Inventor 冯健袁唯李武岐杨亭亭
Owner SUNWODA ELECTRONICS
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