CN210466181U - ACC signal forced activation power supply conducting circuit - Google Patents
ACC signal forced activation power supply conducting circuit Download PDFInfo
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- CN210466181U CN210466181U CN201921457007.0U CN201921457007U CN210466181U CN 210466181 U CN210466181 U CN 210466181U CN 201921457007 U CN201921457007 U CN 201921457007U CN 210466181 U CN210466181 U CN 210466181U
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Abstract
The utility model discloses a ACC signal forces activation POWER to switch on circuit relates to the automotive equipment field, including protection circuit and activation POWER supply circuit, protection circuit and activation POWER supply circuit electric connection, protection circuit include the comparator, the output that voltage comparator's fortune was put one is connected with enable end EN, the reverse input end that fortune was put one is connected activation POWER supply circuit, the forward input end that fortune was put one is connected with POWER port POWER-IN, protection circuit is connected with POWER supply and reference voltage VREF, voltage comparator is used for realizing different electrical POWER generating system self-adaptation protections; the active power supply circuit comprises an NPN type triode, a collector terminal of the triode is connected with an inverted input terminal of an operational amplifier I of a voltage comparator, an emitter terminal of the triode is grounded, a base terminal of the triode is connected with an ACC signal positive terminal, and a resistor R1 is connected between the base terminal and the ACC signal positive terminal.
Description
Technical Field
The utility model relates to an automotive equipment field, concretely relates to ACC signal forces activation power supply to switch on circuit.
Background
In order to protect a storage battery of an automobile, a main power-off voltage is usually set for a navigation device on the automobile, for example, a 12V system is usually set to be lower than 11.5V, a 24V system is usually set to be lower than 21.6V, and the power of the device is turned off, but in actual work, the electric quantity of the storage battery may not reach a set voltage threshold, the automobile is actually started, the navigation device still does not work, and when the situation occurs, an automobile control system can misjudge that the navigation device is removed and damaged, so that the automobile is forced to shut down.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides an ACC signal forces activation power to switch on circuit, through the improvement to the circuit, changes voltage comparator's forward input voltage and reverse input voltage's value, can realize being less than under the voltage condition of normal work, when the ACC signal input, equipment can force to open.
The utility model provides a technical scheme that its technical problem adopted is: in an ACC signal forced activation power-on circuit, the improvement comprising: comprises a protection circuit and an activation power circuit, wherein the protection circuit is electrically connected with the activation power circuit,
the protection circuit comprises a voltage comparator, the output end of an operational amplifier I of the voltage comparator is connected with an enable end EN, the reverse input end of the operational amplifier I is connected with an activated POWER circuit, the forward input end of the operational amplifier I is connected with a POWER port POWER-IN, the protection circuit is connected with a POWER supply and a reference voltage VREF, and the voltage comparator is used for realizing the self-adaptive protection of different POWER systems;
the active power circuit comprises an NPN type triode, a collector terminal of the triode is connected with an inverted input terminal of an operational amplifier I of the voltage comparator, an emitter terminal of the triode is grounded, a base terminal of the triode is connected with an ACC signal positive terminal, and a resistor R1 is connected between the base terminal and the ACC signal positive terminal.
As a further improvement of the above solution, the protection circuit further includes a primary protection circuit, the primary protection circuit includes a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a capacitor C1, the resistor R2 and the resistor R3 are connected IN parallel, the resistor R2 and the resistor R3 connected IN parallel are connected between a forward input terminal of the operational amplifier of the voltage comparator and the POWER port POWER-IN, the resistor R4 is connected between a forward input terminal of the operational amplifier of the voltage comparator and an output terminal of the operational amplifier, one end of the resistor R5, one end of the resistor R6, and one end of the resistor R7 are all connected to the forward input terminal of the operational amplifier of the voltage comparator, the other end of the resistor R5 is connected to the other end of the resistor R6, the other end of the resistor R7 is grounded, one end of the capacitor C1 is connected between the resistor R7 and the forward input terminal of the operational amplifier of the voltage comparator, the other end of the capacitor C1 is grounded.
As a further improvement of the above scheme, the protection circuit further includes a primary protection circuit 21, the primary protection circuit includes a terminal, a resistor R8, a resistor R9, and a resistor R10, two pins of the terminal are connected to a parallel position of the resistor R5 and the resistor R6, the resistor R8 and the resistor R9 are connected in series between a first pin and a third pin of the terminal, the first pin is further grounded, the third pin is further connected to an output terminal of the operational amplifier two of the voltage comparator, a positive input terminal of the operational amplifier two of the voltage comparator is connected to a positive terminal of a diode Z1, a negative terminal of the diode Z1 is connected to an output terminal of the operational amplifier two of the comparator, a positive terminal of the diode Z1 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the reference voltage VREF.
As a further improvement of the above scheme, the primary protection circuit further includes a capacitor C2, a capacitor C3, a resistor R11, a diode Z1, and a diode Z2, a forward input end of the operational amplifier ii of the voltage comparator is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a reverse input end of the operational amplifier ii of the voltage comparator, the reverse input end of the operational amplifier ii of the voltage comparator is connected to a negative electrode end of the diode Z2, an input end is placed at a positive electrode end of the diode Z2, and the resistor R11 is connected between the diode Z2 and the reverse input end of the operational amplifier ii of the voltage comparator.
As a further improvement of the above scheme, two branches are connected between the resistor R11 and the inverting input terminal of the second operational amplifier of the voltage comparator, one branch includes a resistor R12, one end of the resistor R12 is connected to the resistor R11, the other end of the resistor R11 is connected to a power supply, the other branch includes a resistor R13, one end of the resistor R13 is connected to the resistor R11, the other end of the resistor R13 is grounded, the inverting input terminal of the second operational amplifier of the voltage comparator is connected to one end of the capacitor C3, and the other end of the capacitor C3 is grounded.
As a further improvement of the above solution, the VCC port of the voltage comparator is connected with a resistor R14, the resistor R14 is also connected with a power supply, a branch circuit is connected between the VCC port of the voltage comparator and the resistor R14, the branch circuit comprises a capacitor C4, one end of the capacitor C4 is connected with R14, the other end is grounded, the reverse input end of the operational amplifier of the voltage comparator is connected with a voltage stabilizer, a resistor R15 is arranged between the inverting input end of the operational amplifier I of the voltage comparator and the output voltage end of the voltage stabilizer, the grounding end of the voltage stabilizer is grounded, the input voltage reference end is connected with a capacitor C5, the capacitor C5 is also grounded, the input voltage reference end is connected with a reference voltage VREF, the reference voltage VREF is connected with an output voltage end of the voltage stabilizer, the output voltage end of the voltage stabilizer is also connected with a resistor R16, and the other end of the resistor R16 is connected with a 12V power supply.
As a further improvement of the above solution, the activation power supply circuit further includes a resistor R17 and a capacitor C6, one end of the resistor R17 is connected between the collector of the transistor and the resistor R1, the other end is grounded, one end of the capacitor C6 is connected to the collector of the transistor, and the other end is grounded.
As a further improvement of the scheme, the model of the voltage comparator is LM 2903.
As a further improvement of the scheme, the model of the voltage stabilizer is TL 431.
The utility model has the advantages that: the utility model provides a ACC signal forces activation power to switch on circuit, the positive input and the reverse voltage value of inputing through voltage comparator in the regulating circuit realize the output high level of output, just can realize under the voltage condition that is less than normal work, when the ACC signal input, equipment can force to open.
Drawings
Fig. 1 is a circuit diagram of an ACC signal forced-activation power-on circuit of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
Referring to fig. 1, the utility model discloses a ACC signal forced activation POWER supply conducting circuit, including protection circuit and activation POWER supply circuit 10, protection circuit and activation POWER supply circuit 10 electric connection, protection circuit include voltage comparator, voltage comparator's output 1 that the fortune put one is connected with enable end EN, fortune put one reverse input 2 and connect activation POWER supply circuit 10, fortune put one forward input 3 and be connected with POWER port POWER-IN, protection circuit is connected with POWER supply and reference voltage VREF, voltage comparator is used for realizing different electrical POWER generating system self-adaptation protections; the active power supply circuit 10 comprises an NPN type triode Q1, a collector end of the triode is connected with a reverse input end 2 of an operational amplifier I of a voltage comparator, an emitter end of the triode is grounded, a base end of the triode is connected with an ACC signal positive end, a resistor R1 is connected between the base end and the ACC signal positive end, the power supply conducting circuit controls the voltage values of a forward input end 3 of the operational amplifier I of the voltage comparator and the reverse input end 2 of the operational amplifier I through a protection circuit, and the power supply conducting circuit is combined with the active power supply circuit 10 to enable an output end 1 of the operational amplifier I to output high level and force an enabling pin of a power supply IC to be turned on to enable a power supply.
Further, the protection circuit further comprises a primary protection circuit 20, the primary protection circuit 20 comprises a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a capacitor C1, the resistor R2 and the resistor R3 are connected IN parallel, the resistor R2 and the resistor R3 which are connected IN parallel are connected between the positive input terminal 3 of the operational amplifier of the voltage comparator and the POWER port POWER-IN, the resistor R4 is connected between the positive input terminal 3 of the operational amplifier of the voltage comparator and the output terminal 1 of the operational amplifier, one end of the resistor R5, one end of the resistor R6 and one end of the resistor R7 are all connected with the positive input terminal 3 of the operational amplifier of the voltage comparator, the other end of the resistor R5 is connected with the other end of the resistor R6, the other end of the resistor R7 is grounded, one end of the capacitor C1 is connected between the resistor R7 and the positive input terminal 3 of the operational amplifier of the voltage comparator, the other end of the capacitor C1 is grounded, and the forward input terminal 3 of the operational amplifier of the voltage comparator is connected with the output terminal 1 of the operational amplifier of the voltage comparator through the resistor R4, so as to generate a hysteresis voltage and prevent oscillation at a critical point.
Still further, the protection circuit further comprises a primary protection circuit 21, the primary protection circuit 21 comprises a terminal P3, a resistor R8, a resistor R9 and a resistor R10, the two pins (P3-2) of the terminal P3 are connected at the parallel position of the resistor R5 and the resistor R6, the resistor R8 and the resistor R9 are connected in series between the pin I (P3-1) and the pin III (P3-3) of the terminal P3, the pin I (P3-1) is also grounded, the pin III (P3-3) is also connected with the output end 7 of the operational amplifier II of the voltage comparator, the positive input end 5 of the operational amplifier II of the voltage comparator is connected with the positive end of the diode Z1, the negative end of the diode Z1 is connected with the output end 7 of the operational amplifier II of the comparator, the positive end of the diode Z1 is connected with one end of a resistor R10, and the other end of the resistor R10 is connected with a reference voltage VREF;
the primary protection circuit 21 further includes a capacitor C2, a capacitor C3, a resistor R11, a diode Z1, and a diode Z2, a forward input terminal 5 of a second operational amplifier of the voltage comparator is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with a reverse input terminal 6 of the second operational amplifier of the voltage comparator, the reverse input terminal 6 of the second operational amplifier of the voltage comparator is connected with a negative terminal of the diode Z2, an input terminal H is placed at a positive terminal of the diode Z2, the resistor R11 is connected between the diode Z2 and the reverse input terminal 6 of the second operational amplifier of the voltage comparator, two branches are connected between the resistor R11 and the reverse input terminal 6 of the second operational amplifier of the voltage comparator, one branch includes a resistor R12, one end of the resistor R12 is connected with the resistor R11, the other end of the resistor R13 is connected with a power supply, one end of the resistor R13 is connected with the resistor R11, the other end of the capacitor C3 is grounded, and the inverting input end 6 of the operational amplifier II of the voltage comparator is connected with one end of a capacitor C3.
In the above embodiment, the capacitor resistors in the first protection circuit and the second protection circuit are both used to assist the voltage value of the forward input terminal 3 of the operational amplifier of the voltage comparator to be greater than the voltage value of the reverse input terminal 2 of the operational amplifier, the output terminal 1 of the operational amplifier of the voltage comparator outputs a high level to force the enable pin of the power IC to be turned on, wherein the second protection circuit is connected to the primary protection circuit 20 through the resistor R5, when the system voltage value is 24V, and when the input terminal H inputs a high level, the output terminal 7 of the operational amplifier of the voltage comparator is locked at a low level to ensure that the system operates at 24V; when the system voltage value is 12V, the input end H is suspended, the output end 7 of the operational amplifier II of the voltage comparator is locked at a high level, and the system is ensured to work at 12V.
In the above embodiment, the present invention further provides another embodiment, the VCC port of the voltage comparator is connected with a resistor R14, the resistor R14 is further connected with a power supply, a branch is connected between the VCC port of the voltage comparator and the resistor R14, the branch includes a capacitor C4, one end of the capacitor C4 is connected with R14, the other end is grounded, the inverting input terminal 2 of the operational amplifier of the voltage comparator is connected with a voltage stabilizer, a resistor R15 is arranged between the inverting input terminal 2 of the operational amplifier of the voltage comparator and the output voltage terminal K of the voltage stabilizer, the ground terminal a of the voltage stabilizer is grounded, the input voltage reference terminal R is connected with a capacitor C5, the capacitor C5 is further grounded, the input voltage reference terminal R is connected with a reference voltage VREF, the reference voltage VREF is connected with the output voltage terminal K of the voltage stabilizer, the output voltage terminal K of the voltage stabilizer is further connected with a resistor R16, the other end of the resistor R16 is connected to a power supply.
In addition, the activation power supply circuit 10 further comprises a resistor R17 and a capacitor C6, one end of the resistor R17 is connected between a collector of the triode Q1 and the resistor R1, the other end of the resistor R17 is grounded, one end of the capacitor C6 is connected to a collector of the triode Q1, the other end of the capacitor C6 is grounded, the triode Q1 of the activation power supply circuit 10 is powered on forcibly, the resistor R1 and the resistor R17 divide voltage to protect the triode Q1, and the capacitor C6 filters and removes impurities to prevent false triggering.
In the above embodiment, the utility model discloses an ACC signal forces activation power supply switch-on circuit to realize being less than under the voltage condition of normal work, when ACC signal input, equipment can force to open, set up resistance R2, R3, R5, R6, R7 and electric capacity C1 control voltage comparator's the voltage value of the first forward input 3 of operational amplifier is higher than the voltage value of the first reverse input 2 of operational amplifier of voltage comparator, combine components and parts such as activation power supply circuit 10's NPN type triode Q1, resistance R1, resistance R17 and electric capacity C6, when ACC signal input, output 1 of the first operational amplifier of voltage comparator outputs the high level, force power IC's enable foot to open and make power IC normal work.
As shown in fig. 1, U1-a and U1-B are the same voltage comparator, and for the convenience of drawing, a voltage comparator is separately drawn and conveniently wired, the model of the voltage comparator is LM2903, and two operational amplifiers are contained in the voltage comparator, so that the voltage comparator of the ACC signal forced power-on circuit of the present invention is not limited to the chip of the model, and can realize the adaptive protection of different power systems.
The model of stabiliser is TL431, realize the utility model discloses a stabiliser of ACC signal force activation power supply switch-on circuit does not confine the components and parts of this model to, can do the utility model provides a stable reference voltage value can.
The power supply is 12V, and the voltage value of the reference voltage is 2.5V.
Specific implementation the utility model discloses a during ACC signal forces activation POWER to switch on circuit, when this circuit applied corresponding circuit, when ACC signal input, triode Q1 of activation POWER supply circuit 10 is opened, make voltage comparator LM 2903's the voltage value of the reverse input 2 of putting one draw down and send 0V, this moment as long as the voltage value that one-level protection circuit 20 POWER port POWER _ IN input is greater than 0V, through resistance R2, resistance R5, resistance R6, resistance R7's partial pressure, voltage comparator's the fortune is put the voltage value of a forward input 3 and all can be greater than the voltage value of the reverse input 2 of putting one, voltage comparator's the output high level of output 1 of putting one of voltage comparator, make POWER IC's messenger enable foot open, POWER IC normally works this moment.
The utility model has the advantages that: the utility model provides a ACC signal forces activation power to switch on circuit, the positive input and the reverse voltage value of inputing through voltage comparator in the regulating circuit realize the output high level of output, just can realize under the voltage condition that is less than normal work, when the ACC signal input, equipment can force to open.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (9)
1. An ACC signal forced activation power-on circuit, comprising: comprises a protection circuit and an activation power circuit, wherein the protection circuit is electrically connected with the activation power circuit,
the protection circuit comprises a voltage comparator, the output end of an operational amplifier I of the voltage comparator is connected with an enable end EN, the reverse input end of the operational amplifier I is connected with an activated POWER circuit, the forward input end of the operational amplifier I is connected with a POWER port POWER-IN, the protection circuit is connected with a POWER supply and a reference voltage VREF, and the voltage comparator is used for realizing the self-adaptive protection of different POWER systems;
the active power supply circuit comprises an NPN type triode, a collector terminal of the triode is connected with an inverted input terminal of an operational amplifier I of the voltage comparator, an emitter terminal of the triode is grounded, a base terminal of the triode is connected with an ACC signal positive terminal, and a resistor (R1) is connected between the base terminal and the ACC signal positive terminal.
2. An ACC signal forced-active power-on circuit as claimed in claim 1, wherein: the protection circuit further comprises a primary protection circuit, the primary protection circuit comprises a resistor (R2), a resistor (R3), a resistor (R4), a resistor (R5), a resistor (R6), a resistor (R7) and a capacitor (C1), the resistor (R2) and the resistor (R3) are connected IN parallel, the resistor (R2) and the resistor (R3) which are connected IN parallel are connected between the forward input end of the operational amplifier I of the voltage comparator and the POWER port POWER-IN, the resistor (R4) is connected between the forward input end of the operational amplifier I of the voltage comparator and the output end of the operational amplifier I, one end of the resistor (R5), one end of the resistor (R6) and one end of the resistor (R7) are connected with the forward input end of the operational amplifier I of the voltage comparator, the other end of the resistor (R5) is connected with the other end of the resistor (R6), the other end of the resistor (R7) is grounded, one end of the capacitor (C1) is connected between the forward input end of the operational amplifier (R7) of the voltage comparator and the output end of the operational amplifier I, the other end of the capacitor (C1) is grounded.
3. An ACC signal forced-active power-on circuit as claimed in claim 2, wherein: the protection circuit still includes the second grade protection circuit, the second grade protection circuit include terminal, resistance (R8), resistance (R9) and resistance (R10), the parallel position of resistance (R5) and resistance (R6) is connected to two pins of terminal, resistance (R8) and resistance (R9) establish ties between a pin and No. three pins of terminal, a pin still ground connection, No. three pins still are connected with the output of two of voltage comparator's fortune, the positive terminal of diode (Z1) is connected to the positive direction input end of two of voltage comparator's fortune, and the negative pole end of diode (Z1) is connected with the output of two of comparator's fortune, the positive terminal connecting resistance (R10) one end of diode (Z1), and reference voltage VREF is connected to this resistance (R10) other end.
4. An ACC signal forced-active power-on circuit as claimed in claim 3, wherein: one-level protection circuit still include electric capacity (C2), electric capacity (C3), resistance (R11), diode (Z1) and diode (Z2), the one end of electric capacity (C2) is connected to the forward input end that two were put to voltage comparator's fortune, the reverse input end that two were put to electric capacity (C2) other end and voltage comparator's fortune is connected, the reverse input end that two were put to voltage comparator's fortune is connected with the negative pole end of diode (Z2), an input has been placed to the positive terminal of diode (Z2), resistance (R11) is connected between the reverse input end that two were put to diode (Z2) and voltage comparator's fortune.
5. An ACC signal forced-active power-on circuit as claimed in claim 4, wherein: two branch circuits are connected between the reverse input end of the two are put to resistance (R11) and voltage comparator's fortune, and a branch circuit includes resistance (R12), and this resistance (R12) one end connecting resistance (R11), and power supply is connected to the other end, another branch circuit includes resistance (R13), and this resistance (R13) one end connecting resistance (R11), other end ground connection, the reverse input end of the two is put to voltage comparator's fortune connects electric capacity (C3) one end, electric capacity (C3) other end ground connection.
6. An ACC signal forced-active power-on circuit as claimed in claim 1, wherein: the VCC port of the voltage comparator is connected with a resistor (R14), the resistor (R14) is also connected with a power supply, a branch is connected between the VCC port of the voltage comparator and the resistor (R14), the branch circuit comprises a capacitor (C4), one end of the capacitor (C4) is connected with a resistor (R14), the other end is grounded, the reverse input end of the operational amplifier I of the voltage comparator is connected with a voltage stabilizer, a resistor (R15) is arranged between the reverse input end of the operational amplifier I of the voltage comparator and the output voltage end of the voltage stabilizer, the ground end of the voltage stabilizer is grounded, the input voltage reference end is connected with a capacitor (C5), the capacitor (C5) is also grounded, the input voltage reference end is connected with a reference voltage VREF, the reference voltage VREF is connected with an output voltage end of the voltage stabilizer, the output voltage end of the voltage stabilizer is also connected with a resistor (R16), and the other end of the resistor (R16) is connected with a power supply.
7. An ACC signal forced-active power-on circuit as claimed in claim 1, wherein: the activation power supply circuit further comprises a resistor (R17) and a capacitor (C6), one end of the resistor (R17) is connected between the collector of the triode (Q1) and the resistor (R1), the other end of the resistor (R17) is grounded, one end of the capacitor (C6) is connected to the collector of the triode (Q1), and the other end of the capacitor (C6) is grounded.
8. An ACC signal forced-active power-on circuit as claimed in claim 1, wherein: the model of the voltage comparator is LM 2903.
9. An ACC signal forced-active power-on circuit as claimed in claim 6, wherein: the model of the voltage stabilizer is TL 431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457007.0U CN210466181U (en) | 2019-09-03 | 2019-09-03 | ACC signal forced activation power supply conducting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457007.0U CN210466181U (en) | 2019-09-03 | 2019-09-03 | ACC signal forced activation power supply conducting circuit |
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| CN210466181U true CN210466181U (en) | 2020-05-05 |
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| CN201921457007.0U Active CN210466181U (en) | 2019-09-03 | 2019-09-03 | ACC signal forced activation power supply conducting circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
| CN113342116A (en) * | 2021-06-30 | 2021-09-03 | 合肥博雷电气有限公司 | Voltage reference setting circuit capable of being adjusted in program control mode and hardware equipment |
-
2019
- 2019-09-03 CN CN201921457007.0U patent/CN210466181U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
| CN113342116A (en) * | 2021-06-30 | 2021-09-03 | 合肥博雷电气有限公司 | Voltage reference setting circuit capable of being adjusted in program control mode and hardware equipment |
| CN113342116B (en) * | 2021-06-30 | 2023-08-04 | 合肥博雷电气有限公司 | Voltage reference setting circuit capable of being adjusted in program control mode and hardware equipment |
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