CN217692643U - Voltage stabilizing circuit - Google Patents
Voltage stabilizing circuit Download PDFInfo
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- CN217692643U CN217692643U CN202221284294.1U CN202221284294U CN217692643U CN 217692643 U CN217692643 U CN 217692643U CN 202221284294 U CN202221284294 U CN 202221284294U CN 217692643 U CN217692643 U CN 217692643U
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Abstract
The utility model provides a voltage stabilizing circuit, the circuit main part is including the real-time current value in the detection circuitry, play current limiting's resistance R1 and triode Q2, wherein resistance R1's input is connected with input voltage Ui, the output is connected with triode Q2, triode Q2 output voltage Uo, current protection self-locking circuit 1 is connected with current-limiting resistance R1, current protection self-locking circuit 1 is connected with resistance R1, the real-time current value of receiving resistance R1 department, and be connected with reference voltage circuit 2, reference voltage circuit 2 provides the reference voltage value to triode Q1, simultaneously with triode Q2's output, output voltage Uo is connected, detect the real-time voltage output condition. The utility model provides a pair of voltage stabilizing circuit can keep the guard state, reliable output of closing linear power supply through the auto-lock circuit when the electric current reaches the current protection point to keep lossless state.
Description
Technical Field
The utility model belongs to the technical field of the electric power technique and specifically relates to a voltage stabilizing circuit.
Background
In the design and development process of electronic products, safe power utilization is a basic requirement for electrical design, safety and reliability for ensuring the work of an electric power system are a primary problem which must be considered by all engineers, the electric power system needs to provide stable current and voltage to ensure the safe and stable operation of a load, and therefore, a linear circuit needs to be capable of maintaining a stable current state or cutting off the current when overcurrent, so that the requirements of voltage stabilization, current stabilization output and overcurrent protection are met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses main aim at provides a voltage stabilizing circuit can keep the guard state through the auto-lock circuit when the electric current reaches the current protection point, the reliable output of closing linear power to keep lossless state.
In order to achieve the above object, the utility model provides a voltage stabilizing circuit, its technical scheme is:
a voltage stabilizing circuit comprises a reference voltage circuit and a current protection self-locking circuit, wherein the reference voltage circuit provides reference voltage, one end of a resistor R1 for detecting the current value of a line is connected with an input voltage Ui, the other end of the resistor R1 is connected with a c pole of a triode Q2, a b pole of the triode Q2 is connected with the reference voltage circuit, and an e pole of the triode Q2 outputs voltage Uo; the current protection self-locking circuit comprises a triode Q1, a self-locking device U1 and a triode Q3, wherein the e pole of the triode Q1 is connected with a line between an input power supply Ui and a current detection resistor R1, the b pole of the triode Q1 is connected with a line between the current detection resistor R1 and a triode Q2, the c pole of the triode Q1 is connected with the output end of the self-locking device U2, the output end of the self-locking device U2 is connected with the b pole of the triode Q3, the c pole of the triode Q3 is connected with a reference voltage circuit, and the e pole of the triode Q3 is grounded; when the input current is smaller than the protection value, the triode Q1 is not conducted, the c pole outputs low level, the self-locker U1 outputs low level, the triode Q3 is in a cut-off state, and the voltage stabilizing circuit outputs a voltage Uo equivalent to the reference voltage; when the input current is larger than the protection value, the triode Q1 is conducted, the c pole outputs high level, the self-locker U2 outputs high level, the triode Q3 is in a conducting state, the reference voltage is reduced, the triode Q2 is closed, and no output exists.
Furthermore, the b pole of the triode Q1 is connected with the current detection resistor R1 and the triode Q2 through a current overflow signal inversion circuit and a circuit between the current detection resistor R1 and the triode Q2.
Further, the current overflow signal inversion circuit includes a resistor R2.
Further, the output end of the self-locking device U2 is connected to the b-pole of the triode Q3 through a resistor R4.
Further, the self-locker U2 is an SR self-locker and comprises an S end, an R end and a Q end, wherein the S end is connected with the c pole of the triode Q1 through the input end, and the Q end is connected with the e pole of the triode Q3 through the output end.
Further, the end R is connected with a reset signal circuit, when the end R inputs a high level, the end Q outputs a low level, and the output voltage UO is recovered to be output normally.
Further, the reference voltage circuit comprises a voltage stabilizing tube U2, a resistor R5 and a resistor R6, the negative electrode of the voltage stabilizing tube U2 is connected with the b electrode of the triode Q2, the positive electrode of the voltage stabilizing tube U2 is grounded, one end of the resistor R5 is connected with the e electrode of the triode Q2, the other end of the resistor R5 is connected with the resistor R6 and then connected with the voltage stabilizing tube U2, and the other end of the resistor R6 is grounded.
Further, one end of the resistor R3 is connected to the circuit between the resistor R1 and the c-pole of the transistor Q2, and the other end is connected to the c-pole of the transistor A1.
Furthermore, a circuit between the c pole of the triode Q3 and the resistor R3 and a circuit between the negative pole of the voltage regulator tube U2 and the b pole of the triode Q2 are connected through a circuit.
Further, the voltage regulator tube U2 is a diode.
To sum up, the utility model provides a pair of voltage stabilizing circuit compares with prior art, has following technical advantage:
the real-time state of the current is detected by arranging the self-locking circuit, and when the current exceeds a protection point, the voltage output is cut off by the self-locking circuit to protect a load;
by arranging the reference voltage circuit, the circuit stably outputs an output voltage which is equivalent to the reference voltage and lower than the input voltage;
an SR self-locking device is adopted to detect the current value in real time, and the circuit recovers output by inputting a reset signal;
the fault state is automatically latched, no loss is generated on a line, the device is reliably protected, and the reliability of the system is improved.
Description of the drawings:
FIG. 1: the utility model relates to a schematic diagram of the composition of a voltage stabilizing circuit;
FIG. 2: the utility model relates to a voltage stabilizing circuit connection diagram I;
FIG. 3: the utility model relates to a voltage stabilizing circuit connection diagram II;
in the figure: the circuit comprises an input power Ui, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode Q1, a triode Q2, a triode Q3, a self-locking device U1, a voltage regulator tube U2, a reset signal Uf, an output voltage Uo, a current protection self-locking circuit 1 and a reference voltage circuit 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a pair of voltage stabilizing circuit, as shown in fig. 1, the circuit main part is including real-time current value in the detection circuitry, play current limiting's resistance R1 and triode Q2, wherein resistance R1's input is connected with input voltage Ui, the output is connected with triode Q2, triode Q2 output voltage Uo, current protection self-locking circuit 1 is connected with current-limiting resistance R1, current protection self-locking circuit 1 is connected with resistance R1, the real-time current value of receiving resistance R1 department, and be connected with reference voltage circuit 2, reference voltage circuit 2 provides the reference voltage value to triode Q1, simultaneously with triode Q2's output, output voltage Uo is connected, detect the real-time voltage output condition.
As shown in fig. 2, the input voltage Ui is connected to the input terminal of the resistor R1, the real-time current value in the circuit is detected by the resistor R1, the output terminal of the resistor R1 is connected to the c-pole of the transistor Q2, and the e-pole of the transistor Q2 outputs the voltage Uo. The current self-locking protection circuit comprises a triode AQ1, a self-locking device U1 and a triode Q3, wherein the e pole of the triode Q1 is connected with the input end line of a resistor R1, the b pole of the triode Q1 is connected with the output end of the resistor R1, the c pole of the triode Q1 is connected with one input end of the self-locking device U1, the output end of the self-locking device U1 is connected with the b pole of the triode Q3, the e pole of the triode Q3 is grounded, and the c pole of the triode Q3 is connected with a reference voltage circuit 2. In this embodiment, the self-locker U1 is an SR self-locker, and includes an S terminal and an R terminal of a signal input, and a Q terminal of a signal output, where the Q terminal outputs a low level when the S terminal inputs a low level, the Q terminal outputs a low level when the R terminal inputs a high level, and the Q terminal outputs a high level when the S terminal inputs a high level.
Further, as shown in fig. 3, the b pole of the transistor Q1 is connected to the input end of the resistor R2, and the output end of the resistor R2 is connected to the output end of the resistor R1, that is, the output end of the resistor R2 is connected to the c pole of the resistor R1 and the transistor Q2, so that the transistor Q1 and the resistor R2 form a circuit current overcurrent signal reversing circuit.
Further, as shown in fig. 3, a resistor R4 is connected between the b-pole of the latch U1 and the triode Q3, so that the triode Q1, the resistor R2, the SR latch U1, the resistor R4 and the triode Q3 form the current protection self-locking circuit 1 in the voltage stabilizing circuit provided by the utility model.
As shown in fig. 2 and fig. 3, the reference voltage circuit 2 includes a voltage regulator tube U2 capable of providing a reference power supply, the voltage regulator tube U2 may be a diode, the positive electrode of the voltage regulator tube U2 is grounded, the negative electrode of the voltage regulator tube U2 is connected to the b electrode of the transistor Q2, and the voltage output end of the circuit, i.e., the e electrode of the transistor Q2, is further connected to resistors R5 and R6 for detecting real-time data of the output voltage Uo and providing the real-time data to the voltage regulator tube U2. One end of the resistor R5 is connected with the e pole of the triode Q2, the other end of the resistor R6 is connected with the resistor R6, and the other end of the resistor R6 is grounded. The circuit between the resistors R5 and R6 is connected with the voltage regulator tube U2, one end of the resistor R3 is connected with the circuit between the resistor R1 and the c pole of the triode Q2, the other end of the resistor R3 is connected with the circuit between the voltage regulator tube U2 and the b pole of the triode Q2, and the c pole of the triode Q3 is connected with the circuit between the resistor R3 and the negative pole of the voltage regulator tube U2. The resistor R1, the triode Q2, the voltage regulator tube U2, the resistor R5 and the resistor R6 form a main circuit of the voltage stabilizing circuit provided by the embodiment, a stable voltage Uo is output, the output voltage Uo is equivalent to a reference voltage provided by the voltage regulator tube U2 and is lower than the input voltage Ui, and output voltage instability caused by fluctuation of the input voltage Ui is avoided. In practical application, according to the requirement of voltage regulation, other necessary electric devices including but not limited to the above-mentioned resistor, triode, and voltage regulator tube, and the series and parallel connection of all devices can be arranged in the main circuit of the voltage regulator circuit, and other devices such as capacitor and other resistors can be connected by adopting different connection modes.
The utility model provides a voltage stabilizing circuit is when using, when the real-time current that resistance R1 detected is less than the guard value, triode Q1 does not switch on, exports the low level, and the S end of latch U1 is the low level, and Q end output low level, triode Q3 are off state, and stabilivolt U2 stably provides reference voltage this moment, and triode Q2' S e utmost point output and reference voltage are output voltage UO partially; when the real-time current detected by the resistor R1 is larger than or equal to a protection value, the triode Q1 is conducted, the c pole outputs high voltage and low voltage, namely the S end of the latch U1 is high level, the Q end also outputs high level, the triode Q3 is in a conduction state, the reference voltage of the voltage regulator tube U2 is pulled down at the moment, the triode Q2 is closed, and the output voltage UO is not output. When the current (external current) flowing through the resistor R1 returns to normal, the reset circuit sends a reset signal Uf to the latch U1, namely the end R of the latch is at high level, the end Q returns to output low level, the triode Q3 is cut off, and the output voltage UO returns to normal output.
To sum up, the utility model provides a pair of voltage stabilizing circuit compares with prior art, has following technical advantage:
the real-time state of the current is detected by arranging the self-locking circuit, and when the current exceeds a protection point, the voltage output is cut off by the self-locking circuit to protect a load;
by setting a reference voltage circuit, the circuit stably outputs an output voltage which is equivalent to the reference voltage and lower than the input voltage;
an SR self-locking device is adopted to detect the current value in real time, and the circuit recovers output by inputting a reset signal;
the fault state is automatically latched, no loss is generated on a line, the device is reliably protected, and the reliability of the system is improved.
However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. A voltage stabilizing circuit is characterized in that: the circuit comprises a reference voltage circuit for providing reference voltage and a current protection self-locking circuit, wherein one end of a resistor R1 for detecting the current value of a line is connected with an input voltage Ui, the other end of the resistor R1 is connected with a c pole of a triode Q2, a b pole of the triode Q2 is connected with the reference voltage circuit, and an e pole of the triode Q2 outputs a voltage Uo; the current protection self-locking circuit comprises a triode Q1, a self-locking device U1 and a triode Q3, wherein the e pole of the triode Q1 is connected with a line between an input power supply Ui and a current detection resistor R1, the b pole of the triode Q1 is connected with a line between the current detection resistor R1 and a triode Q2, the c pole of the triode Q1 is connected with the output end of the self-locking device U2, the output end of the self-locking device U2 is connected with the b pole of the triode Q3, the c pole of the triode Q3 is connected with a reference voltage circuit, and the e pole of the triode Q3 is grounded; when the input current is smaller than the protection value, the triode Q1 is not conducted, the c pole outputs a low level, the self-locker U1 outputs a low level, the triode Q3 is in a cut-off state, and the voltage stabilizing circuit outputs a voltage Uo equivalent to the reference voltage; when the input current is larger than the protection value, the triode Q1 is conducted, the c pole outputs high level, the self-locker U2 outputs high level, the triode Q3 is in a conducting state, the reference voltage is reduced, the triode Q2 is closed, and no output exists.
2. The voltage regulator circuit of claim 1, wherein: and the b pole of the triode Q1 is connected with a circuit between the current detection resistor R1 and the triode Q2 through the current overcurrent signal reversal circuit and the current detection resistor R1.
3. The voltage regulator circuit of claim 2, wherein: the current overflow signal inversion circuit comprises a resistor R2.
4. The voltage regulator circuit of claim 1, wherein: the output end of the self-locking device U2 is connected with the b pole of the triode Q3 through a resistor R4.
5. The voltage regulator circuit of claim 1, wherein: the self-locking device U2 is an SR self-locking device and comprises an S end, an R end and a Q end, wherein the S end is connected with the c pole of the triode Q1 through the input end, and the Q end is connected with the e pole of the triode Q3 through the output end.
6. The voltage regulator circuit of claim 5, wherein: the R end is connected with a reset signal circuit, when the R end inputs a high level, the Q end outputs a low level, and the output voltage Uo is recovered to be output normally.
7. The voltage regulator circuit of any of claims 1 to 6, wherein: the reference voltage circuit comprises a voltage regulator tube U2, a resistor R5 and a resistor R6, the negative electrode of the voltage regulator tube U2 is connected with the b electrode of the triode Q2, the positive electrode of the voltage regulator tube U2 is grounded, one end of the resistor R5 is connected with the e electrode of the triode Q2, the other end of the resistor R5 is connected with the resistor R6 and then connected with the voltage regulator tube U2, and the other end of the resistor R6 is grounded.
8. The voltage regulator circuit of claim 7, wherein: one end of the resistor R3 is connected with a circuit between the resistor R1 and the c pole of the triode Q2, and the other end of the resistor R3 is connected with the c pole of the triode A1.
9. The voltage regulator circuit of claim 8, wherein: and a circuit between the c pole of the triode Q3 and the resistor R3 and a circuit between the negative pole of the voltage regulator tube U2 and the b pole of the triode Q2 are connected through a circuit.
10. The voltage regulator circuit of claim 7, wherein: the voltage regulator tube U2 is a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221284294.1U CN217692643U (en) | 2022-05-25 | 2022-05-25 | Voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221284294.1U CN217692643U (en) | 2022-05-25 | 2022-05-25 | Voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217692643U true CN217692643U (en) | 2022-10-28 |
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ID=83703306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221284294.1U Active CN217692643U (en) | 2022-05-25 | 2022-05-25 | Voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217692643U (en) |
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2022
- 2022-05-25 CN CN202221284294.1U patent/CN217692643U/en active Active
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