CN205509603U - Double T L431 voltage monitoring circuit - Google Patents
Double T L431 voltage monitoring circuit Download PDFInfo
- Publication number
- CN205509603U CN205509603U CN201620321810.1U CN201620321810U CN205509603U CN 205509603 U CN205509603 U CN 205509603U CN 201620321810 U CN201620321810 U CN 201620321810U CN 205509603 U CN205509603 U CN 205509603U
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- CN
- China
- Prior art keywords
- voltage
- electric capacity
- monitoring circuit
- alarm
- stabilivolt
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Abstract
The utility model discloses a double T L431 voltage monitoring circuit belongs to voltage monitoring circuit technical field. The utility model aims to provide a whether the voltage that can judge the battery is in a certain settlement within range, moreover, the steam generator is simple in structure, use reliable voltage monitoring circuit, including voltage input unit and voltage comparing unit, voltage input unit includes input voltage vin, earthing terminal GND, current -limiting resistor R11, stabilivolt D1, electric capacity C1 and stabilivolt D1 are parallelly connected, voltage comparing unit includes U1, two TL431 of U2, U1's K extremely connects U2's the R utmost point, divider resistance connects U1 and U2, divider resistance satisfies (R1+R2) R3> (R4R5, ) R6, electric capacity C2 and R3 are parallelly connected, and electric capacity C3 and R6 are parallelly connected, and pilot lamp LED one end and U2's K extremely is connected, and input voltage vin is connected through current -limiting resistor R7 to the other end. It keeps watch on to be applicable to lead -acid batteries or lithium battery voltage.
Description
Technical field
This utility model is specifically related to a kind of double TL431 voltage monitoring circuit, belongs to voltage monitoring circuit technical field.
Background technology
For lead-acid battery or lithium battery, if during in use battery undervoltage or overvoltage, as taken measures not in time, just
Battery itself can be caused damage, it is therefore desirable to being monitored cell voltage, common battery voltage monitoring device is typically tied
Structure is complex, and the voltage of monitoring is generally certain point value, it is impossible to make effectively monitoring in whether voltage is in a certain scope.
Utility model content
Therefore, the purpose of this utility model is to provide whether a kind of voltage that can determine whether lead-acid battery or lithium battery is in certain
In one set point, simple in construction, the double TL431 voltage monitoring circuit of service-strong, including voltage input unit and voltage ratio
Relatively unit, voltage input unit includes input voltage vin, and earth terminal GND, current-limiting resistance R11, stabilivolt D1, electric capacity C1 are with steady
Pressure pipe D1 is in parallel, and described voltage comparison unit includes that the K pole of U1, U2 two TL431, U1 connects the R pole of U2, divider resistance R1,
R2, R3, R4, R5, R6 connect U1 and U2, and divider resistance meets (R1+R2)/R3 > (R4//R5)/R6, and electric capacity C2 with R3 is in parallel, electricity
Holding C3 with R6 in parallel, display lamp LED one end is connected with the K pole of U2, and the other end connects input voltage vin through current-limiting resistance R7.
Further, described pair of TL431 voltage monitoring circuit also includes that voltage alarm unit, voltage alarm unit include three
Pole pipe Q1 and Q2, the base stage of Q1 connects input voltage vin, the base stage of Q1 and stabilivolt by stabilivolt and biasing resistor R8, R9
Between be provided with resistance R21 and electric capacity C4, the emitter stage of Q1 connects the base stage of Q2, is provided with point between emitter stage and the base stage of Q2 of Q1
Piezoresistance R23, R22, R24 and electric capacity C5, alarm BZ one end connect Q2 colelctor electrode, the other end connect current-limiting resistance R25 and
Electric capacity C6, electric capacity C6 ground connection, current-limiting resistance R25 connects power source of alarm, and diode D3 is in parallel with alarm BZ.
Further, described alarm BZ is buzzer.
The beneficial effects of the utility model are: of the present utility model pair of TL431 voltage monitoring circuit, make use of TL431
Feature, use two TL431, control the break-make of display lamp, setting by divider resistance according to the restriction of its working condition
Put, can determine whether cell voltage whether in the range of certain voltage, simple in construction, it is judged that accurately, use reliable, it is also possible to under-voltage
Or during overvoltage, sending alarm, it is adaptable to lead-acid battery or lithium battery voltage monitor.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of pair of TL431 voltage monitoring circuit of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is illustrated:
As it is shown in figure 1, a kind of double TL431 voltage monitoring circuit, including voltage input unit and voltage comparison unit, voltage
Input block includes input voltage vin, and earth terminal GND, current-limiting resistance R11, stabilivolt D1, electric capacity C1 are in parallel with stabilivolt D1,
Voltage comparison unit includes that the K pole of U1, U2 two TL431, U1 connects the R pole of U2, and divider resistance R1, R2, R3, R4, R5, R6 are even
Meeting U1 and U2, divider resistance meets (R1+R2)/R3 > (R4//R5)/R6, and electric capacity C2 with R3 is in parallel, and electric capacity C3 with R6 is in parallel, refers to
Showing that lamp LED one end is connected with the K pole of U2, the other end connects input voltage vin through current-limiting resistance R7.
TL431 is controllable accurate source of stable pressure.Its output voltage just can arrange from 2.5V with two resistance arbitrarily
Any value in the range of 36V.The exemplary dynamic impedance of this device is 0.2 Ω, replaces voltage stabilizing two pole with it in many applications
Pipe, such as, digital voltmeter, discharge circuit, pressure-adjustable power supply, Switching Power Supply etc..So-called TL431 is exactly one good heat
Three end adjustable shunt reference sources of stability.
Double TL431 voltage monitoring circuit operation principles are, if input voltage vin is more than 2.5*(R1+R2)/R3 time, U1
Working properly, the negative electrode K of U1 flows through certain electric current simultaneously, thus can form pressure drop on R5 and R4, forces to drag down on R6
Voltage so that U2 work is abnormal, and display lamp LED does not flow through electric current, it is impossible to luminous.If input voltage vin is less than
2.5*(R4//R5)/R6 time, U1, U2 work abnormal, and display lamp LED does not flow through electric current, it is impossible to luminous.If it is defeated
Enter voltage Vin at 2.5*(R1+R2)/R3 and 2.5*(R4//R5) between/R6 time, U4 is working properly, and negative electrode K absorbing current causes
Display lamp LED is luminous.Thus may determine that lead-acid battery or lithium battery voltage whether in the range of certain voltage, by point
Piezoresistance resistance and the adjustment of connected mode, it is also possible to adjust monitoring voltage scope.
As preferred embodiment, double TL431 voltage monitoring circuits also include voltage alarm unit, voltage alarm unit
Base stage including audion Q1 and Q2, Q1 connects input voltage vin by stabilivolt and biasing resistor R8, R9, the base stage of Q1 with
Being provided with resistance R21 and electric capacity C4 between stabilivolt, the emitter stage of Q1 connects the base stage of Q2, between emitter stage and the base stage of Q2 of Q1
Being provided with divider resistance R23, R22, R24 and electric capacity C5, alarm BZ one end connects the colelctor electrode of Q2, and the other end connects current-limiting resistance
R25 and electric capacity C6, electric capacity C6 ground connection, current-limiting resistance R25 connects power source of alarm, and diode D3 is in parallel with alarm BZ.
As preferred embodiment, alarm BZ is buzzer.
When input voltage vin is not at 2.5*(R1+R2)/R3 and 2.5*(R4//R5) between/R6 time, due to electric unit
Interaction between part, audion Q2 turns on, and the i.e. buzzer of alarm works.
It is plumbic acid or lithium battery that this circuit can be used on input voltage detection within the specific limits, such as input, when
Cell voltage is under-voltage or during overvoltage, buzzer can be reported to the police, and when cell voltage is normal, LED can be bright.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (3)
1. double TL431 voltage monitoring circuits, including voltage input unit and voltage comparison unit, voltage input unit includes
Input voltage vin, earth terminal GND, current-limiting resistance R11, stabilivolt D1, electric capacity C1 are in parallel with stabilivolt D1, it is characterised in that institute
State voltage comparison unit and include that the K pole of U1, U2 two TL431, U1 connects the R pole of U2, divider resistance R1, R2, R3, R4, R5, R6
Connecting U1 and U2, divider resistance meets (R1+R2)/R3 > (R4//R5)/R6, and electric capacity C2 with R3 is in parallel, and electric capacity C3 with R6 is in parallel,
Display lamp LED one end is connected with the K pole of U2, and the other end connects input voltage vin through current-limiting resistance R7.
2. double TL431 voltage monitoring circuit as claimed in claim 1, it is characterised in that described pair of TL431 voltage monitoring circuit
Also including that voltage alarm unit, voltage alarm unit include audion Q1 and Q2, the base stage of Q1 passes through stabilivolt and biasing resistor
R8, R9 connect input voltage vin, are provided with resistance R21 and electric capacity C4 between base stage and the stabilivolt of Q1, and the emitter stage of Q1 connects Q2
Base stage, be provided with divider resistance R23, R22, R24 and electric capacity C5 between emitter stage and the base stage of Q2 of Q1, alarm BZ one end is even
Connecing the colelctor electrode of Q2, the other end connects current-limiting resistance R25 and electric capacity C6, electric capacity C6 ground connection, and current-limiting resistance R25 connects alarm electricity
Source, diode D3 is in parallel with alarm BZ.
3. double TL431 voltage monitoring circuit as claimed in claim 2, it is characterised in that described alarm BZ is buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620321810.1U CN205509603U (en) | 2016-04-18 | 2016-04-18 | Double T L431 voltage monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620321810.1U CN205509603U (en) | 2016-04-18 | 2016-04-18 | Double T L431 voltage monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509603U true CN205509603U (en) | 2016-08-24 |
Family
ID=56713860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620321810.1U Expired - Fee Related CN205509603U (en) | 2016-04-18 | 2016-04-18 | Double T L431 voltage monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509603U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196390A (en) * | 2017-06-14 | 2017-09-22 | 桂林电子科技大学 | A kind of wireless charging device and method |
-
2016
- 2016-04-18 CN CN201620321810.1U patent/CN205509603U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196390A (en) * | 2017-06-14 | 2017-09-22 | 桂林电子科技大学 | A kind of wireless charging device and method |
| CN107196390B (en) * | 2017-06-14 | 2023-04-18 | 桂林电子科技大学 | Wireless charging device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |