Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

TL431 application and power supply circuit board, voltage stabilizing method and application

A technology of power supply lines and voltage regulator tubes, applied in electrical components, adjusting electrical variables, instruments, etc., can solve problems such as input voltage limitations, and achieve the effect of broadening the input voltage range and broadening the application range

Active Publication Date: 2019-04-23
XIAN MICROELECTRONICS TECH INST
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a TL431 application power supply line structure and voltage stabilization method and application, which solves the problem of input voltage limitation in the typical application power supply line of TL431, and can be applied to applications with an input voltage of 20V to 50V. range and electronic systems in the range of 80V to 120V

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
  • TL431 application and power supply circuit board, voltage stabilizing method and application
  • TL431 application and power supply circuit board, voltage stabilizing method and application
  • TL431 application and power supply circuit board, voltage stabilizing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The invention is applied to an electronic system with an input range of 20V to 50V, a typical input voltage of 28V, an output voltage of 15V, and a DC / DC converter with an output power of 30W. In this application, the regulated value of Zener tube Z1 is 24V. When V in When the input voltage of the port is less than 24V, the input voltage directly provides current to the base of the triode Q2 after passing through the current limiting resistor R3, and the regulator Z1 does not work. At this time, the emitter of the transistor Q2 is forward-biased and the collector is reverse-biased, and the transistor Q2 works in the amplification region to provide the required working current for the three-terminal programmable precision reference source U1. V out After the output voltage of the port passes through the sampling resistor R1 and the sampling resistor R2, the V out The change of the output voltage of the port is reflected to the reference terminal of the programmable pr...

Embodiment 2

[0034] The structure of the present invention is also applied to a DC / DC converter with an input range of 80V-120V, and the usage method is the same as that of Embodiment 1.

[0035] In addition, according to different input voltage ranges, transistors Q2 with different withstand voltages can be selected. For example, when the input voltage range of the electronic system is 20V to 50V, Q2 selects a triode with a withstand voltage of 80V, and Q1 selects a MOS tube with a withstand voltage of 100V, fully considering the safety and reliability of the electronic system.

[0036] The new TL431 power supply circuit structure proposed above has been put into the design of 20V~50V series and 80V~120V military DC / DC converters, which solves the input voltage limitation of TL431 series regulator and broadens its application range.

[0037] The TL431 application power supply circuit structure of the present invention solves the problem of input voltage limitation in the typical applicati...

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 discloses a TL431 application and power supply circuit board, a voltage stabilizing method and application. An input voltage end is connected with one end of a current-limiting resistorR3, a collector electrode of a triode Q2 and a drain electrode of a MOS (Metal Oxide Semiconductor) tube; the other end of the current-limiting resistor R3 is connected with a negative electrode of avoltage stabilizing tube Z1 and a base electrode of the triode Q2; a positive electrode of the voltage stabilizing tube Z1 is connected to the ground; an emitting electrode of the triode Q2 is connected with one end of a resistor R4; the other end of the resistor R4 is connected with a grid electrode of the MOS tube Q1 and the output end of a three-terminal programmable precision reference sourceU1; a positive electrode of the three-terminal programmable precision reference source U1 is connected to the ground; a reference end is connected with one end of a sampling resistor R1 and one end ofa sampling resistor R2; the other end of the sampling resistor R2 is connected to the ground; the other end of the sampling resistor R1 is connected with a source electrode of the MOS tube Q1; the source electrode of the MOS tube Q1 is an internal power supply end of a system. Voltage can be stably output through the negative electrode of the three-terminal programmable precision reference sourceU1. A limit problem of input voltage in TL431 typical application and power supply circuit is solved.

Description

technical field [0001] The invention belongs to the field of power supply lines, and in particular relates to a TL431 applied power supply line structure, voltage stabilizing method and application. Background technique [0002] The power supply line is often used for the power supply of each control function unit circuit in the electronic system, which is a necessary condition for the normal operation of each functional unit of the electronic system. Electronic engineers have always paid more attention to the power supply lines in electronic systems, for example, the linear regulated power supply line structure and the constant current power supply line structure are the most commonly used. In terms of device application, the three-terminal programmable precision reference source (TL431) has a simple application circuit structure due to its output voltage programmable control and built-in reference source. There are relatively many studies on the application of TL431 in po...

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): G05F1/56H02M3/00H02M3/335
CPCG05F1/56H02M3/00H02M3/335H02M1/0045H02M1/0083
Inventor 刘红霞王凯李翠许拴拴王俊峰王英武
Owner XIAN MICROELECTRONICS TECH INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com