Supercharge Your Innovation With Domain-Expert AI Agents!

Circuit and system for guaranteeing input voltage of secondary power supply based on central control ground offset voltage

A secondary power supply and offset voltage technology, which is applied in the direction of emergency protection circuit devices, circuit devices, circuits or fluid pipelines, etc., can solve the problem of large pressure difference, secondary power chip input voltage exceeding the normal input range, and chip damage and other problems, to achieve the effect of simple circuit, ensuring normal power supply and operation, and avoiding overvoltage damage

Pending Publication Date: 2021-12-07
HUIZHOU DESAY SV AUTOMOTIVE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The content of the invention is to provide a circuit and system based on the offset voltage of the central control to ensure the input voltage of the secondary power supply. Due to its own impedance, the voltage difference between the ground terminal of the vehicle-mounted product and the negative terminal of the battery is relatively large, and the secondary power supply chip is likely to cause the input voltage to exceed the normal input range due to excessive ground offset voltage, which eventually causes chip damage.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit and system for guaranteeing input voltage of secondary power supply based on central control ground offset voltage
  • Circuit and system for guaranteeing input voltage of secondary power supply based on central control ground offset voltage
  • Circuit and system for guaranteeing input voltage of secondary power supply based on central control ground offset voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 2 to Figure 4 As shown, in order to solve the above problems, this embodiment proposes a circuit based on the offset voltage of the central control ground to ensure the input voltage of the secondary power supply, which mainly includes a single-chip microcomputer; the bases of the transistor Q1 and the transistor Q2 are respectively connected to the first The first output terminal and the second output terminal, the collector is connected to the power supply terminal of the single-chip microcomputer and the first voltage detection terminal and the second voltage detection terminal are output in parallel, and the emitter is respectively connected to the negative polarity terminal of the car battery and the zero potential point of the central control; the first voltage The detection terminal and the second voltage detection terminal are connected to the single-chip microcomputer, and the third output terminal of the single-chip microcomputer controls and di...

Embodiment 2

[0046] In order to solve the aforementioned problems, this embodiment proposes a system based on the offset voltage of the central control to ensure the input voltage of the secondary power supply, which includes a single-chip microcomputer; When the high level is stable, test the voltage difference between the first voltage detection terminal and the second voltage detection terminal; it is also used to interrupt the power supply to the secondary power supply chip when the detected voltage difference is greater than the preset value.

[0047] More specifically, the single-chip microcomputer is used to detect the voltage difference between the first voltage detection terminal and the second voltage detection terminal when detecting that the output level of its own interrupt output port is a stable high level.

[0048] In this embodiment, the voltage is unstable during the ignition of the ACC. At this time, other blocks of the vehicle have unstable operating currents, resulting ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of secondary power supply voltage stabilization input, in particular to a circuit and system for guaranteeing input voltage of a secondary power supply based on central control ground offset voltage. The base electrodes of the triode Q1 and the triode Q2 are respectively connected with the first output end and the second output end of the single-chip microcomputer, the collector electrodes are connected with the power supply end of the single-chip microcomputer and output a first voltage detection end and a second voltage detection end in parallel, and the emitter electrodes are respectively connected with the negative polarity end of an automobile battery and a central control zero potential point; and the first voltage detection end and the second voltage detection end are connected to the single-chip microcomputer, and the third output end of the single-chip microcomputer controls the conduction of the secondary power supply chip. The problems that an existing vehicle-mounted product is electrically connected only through a cable of a whole vehicle, the voltage difference between the grounding end of the vehicle-mounted product and the negative polarity end of a battery is large due to the impedance of the cable, the input voltage of a secondary power supply chip is likely to exceed a normal input range due to overlarge ground offset voltage, and finally, the chip is damaged.

Description

technical field [0001] The invention relates to the technical field of secondary power supply stabilized voltage input, in particular to a circuit and system for ensuring the input voltage of the secondary power supply based on the offset voltage of the central control. Background technique [0002] At present, the whole vehicle system is becoming more and more complex, and the number of on-board electronic components is increasing. Some on-board electronic components satisfy the overall layout and at the same time cause the circuit path of the power input of such components to become longer. Since the input power circuit path of this type of vehicle electronic component becomes longer, there is a certain voltage difference between the GND voltage of this type of vehicle product and the GND voltage of the battery system and other electronic components in the vehicle. As in the accompanying drawings figure 1 The block diagram of the power circuit path of Daihang central cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02H1/00H02H7/12B60R16/03G01R19/165
CPCH02H1/0007H02H7/1203B60R16/03G01R19/16576G01R19/16538
Inventor 胡勇
Owner HUIZHOU DESAY SV AUTOMOTIVE
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com