CN212515515U - Start voltage control circuit - Google Patents
Start voltage control circuit Download PDFInfo
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- CN212515515U CN212515515U CN202021069109.8U CN202021069109U CN212515515U CN 212515515 U CN212515515 U CN 212515515U CN 202021069109 U CN202021069109 U CN 202021069109U CN 212515515 U CN212515515 U CN 212515515U
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Abstract
The utility model discloses a starting voltage control circuit, include: the first power supply module is provided with a first port and a second port; the voltage regulating circuit is used for regulating the starting voltage of the first power supply module and is electrically connected with the first port; wherein the voltage regulation circuit comprises: the circuit comprises a first resistor, a second resistor and a first capacitor; the first resistor and the second resistor are connected in series, one end of the first capacitor is electrically connected with a series node of the first resistor and the second resistor, and the other end of the first capacitor is grounded; and setting the starting voltage of the first power supply module by adjusting the resistance value of the first resistor and/or the second resistor. The utility model discloses an adjust voltage regulating circuit's resistance to set for starting voltage, the unstable part of the first power module input voltage of filtering makes the stable output of first power module, guarantees the steady operation of back stage circuit.
Description
Technical Field
The utility model belongs to the technical field of the circuit protection technique and specifically relates to a starting voltage control circuit is related to.
Background
At present, when a power module is connected with an excessive load or the load changes, the power module directly supplies power to the load, so that the power module has the condition of instantaneous voltage drop. When the voltage drop disappears, the power supply module recovers to work normally, the voltage of the power supply module rises, and the output voltage of the power supply module is back hooked. This phenomenon causes the output voltage of the power module to fluctuate, and causes the subsequent device of the power module to frequently power up and down in a very short time, resulting in the loss of data or incomplete start of the subsequent device, and reducing the performance of the subsequent device.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a starting voltage control circuit can set for power module's starting voltage to the problem that the voltage that appears when solving power module and going up returns and colludes.
In a first aspect, the present invention provides a start voltage control circuit, including:
the first power supply module is provided with a first port and a second port; the voltage regulating circuit is used for regulating the starting voltage of the first power supply module and is electrically connected with the first port; wherein the voltage regulation circuit comprises: the circuit comprises a first resistor, a second resistor and a first capacitor; the first resistor and the second resistor are connected in series, one end of the first capacitor is electrically connected with a series node of the first resistor and the second resistor, the other end of the first capacitor is grounded, and the series node is electrically connected with the first port; and setting the starting voltage of the first power supply module by adjusting the resistance value of the first resistor and/or the second resistor.
The utility model discloses start voltage control circuit has following beneficial effect at least: the starting voltage of the power module is set by adjusting the resistance value of the first resistor and/or the second resistor, so that the power module outputs voltage when the input power voltage is stable, the influence of input power voltage fluctuation on the output voltage of the power module is eliminated, the power module outputs stably, and the stable work of a rear-stage circuit of the power module is ensured.
According to the utility model discloses a starting voltage control circuit of other embodiments still includes: and the voltage stabilizing circuit is used for controlling the power supply module to output stable voltage, and is electrically connected with the second port of the power supply module.
According to the utility model discloses a starting voltage control circuit of other embodiments, voltage stabilizing circuit includes: a third resistor; a fourth resistor, the fourth resistor and the third resistor being connected in series; a second capacitor connected in parallel with the third resistor; a second port of the power supply module is electrically connected with a series node of the third resistor and the fourth resistor; and the resistance value of the third resistor and/or the fourth resistor is adjusted to control the power supply module to output stable voltage.
According to other embodiments of the present invention, the start voltage control circuit further comprises a first port, which is an enable port of the first power module.
According to the utility model discloses a starting voltage control circuit of other embodiments still includes: the first filter circuit is electrically connected with the voltage regulating circuit.
According to the utility model discloses a starting voltage control circuit of other embodiments, first filter circuit includes: a third capacitor; a fourth capacitor connected in parallel with the third capacitor; one end of the fifth resistor is electrically connected with the fourth capacitor; one end of the fifth capacitor is electrically connected with the other end of the fifth resistor, and the other end of the fifth capacitor is grounded; wherein a series node of the fifth resistor and the fifth capacitor is electrically connected to the first resistor.
According to the utility model discloses a starting voltage control circuit of other embodiments still includes: and the second filter circuit is electrically connected with the voltage stabilizing circuit.
According to the utility model discloses a starting voltage control circuit of other embodiments, the second filter circuit includes: one end of the sixth capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the sixth capacitor is grounded; one end of the seventh capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the seventh capacitor is grounded; and one end of the eighth capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the eighth capacitor is grounded.
According to the utility model discloses a starting voltage control circuit of other embodiments still includes: a second power supply module; the second power supply module is electrically connected with the first power supply module and used for providing power for the first power supply module.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a block diagram of an embodiment of a start voltage control circuit according to the present invention;
fig. 2 is a circuit diagram of an embodiment of a start-up voltage control circuit according to the present invention;
fig. 3 is a diagram illustrating a relationship between an input voltage and an output voltage of an embodiment of a first power module according to the present invention.
Reference numerals:
the voltage regulating circuit 100, the voltage stabilizing circuit 200, the first filter circuit 300 and the second filter circuit 400.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. 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 the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
In some embodiments, referring to fig. 1, the startup voltage control circuit includes a first power module and a voltage regulation circuit electrically connected to the first power module. Specifically, the voltage regulation circuit is electrically connected to a first port of the first power module. The voltage regulating circuit is used for regulating the starting voltage of the first power supply module, so that the first power supply module outputs voltage again when the input voltage is stable, the unstable part of the input voltage is eliminated, the influence on the output voltage of the first power supply module caused by unstable input voltage is avoided, and the problem that the output voltage is hooked back when the power supply module is powered on is solved.
In some embodiments, referring to fig. 1, the start-up voltage control circuit further includes a voltage stabilizing circuit electrically connected to the first power module, and in particular, the voltage stabilizing circuit is electrically connected to the second port of the first power module. The voltage stabilizing circuit is used for enabling the first power supply module to output stable voltage and ensuring the rear-stage circuit of the first power supply module to work stably. In some embodiments, the voltage regulation circuit comprises: the first resistor, the second resistor and the first capacitor are used for setting the starting voltage of the power module by adjusting the resistance value of the first resistor and/or the second resistor, so that the power module outputs voltage when the input power voltage is stable, the influence of input power voltage fluctuation on the output voltage of the power module is eliminated, the power module outputs stably, and the stable work of a rear-stage circuit of the power module is ensured.
In some embodiments, referring to fig. 2, the voltage regulating circuit 100 is electrically connected to a first port of the first power module U1, specifically, the first port is an enable port of the first power module U1, i.e., the port represented by pin 4 of the first power module U1. The voltage regulating circuit comprises a first resistor R1, a second resistor R2 and a first capacitor C1. The first resistor R1 and the second resistor R2 are connected in series, one end of the first capacitor C1 is electrically connected to a series node of the first resistor R1 and the second resistor R2, and the other end of the first capacitor C1 is grounded. The first resistor R1, the second resistor R2 and the first capacitor C1 form an RC circuit, and the resistance of the first resistor R1 and/or the second resistor R2 is adjusted to set the starting voltage of the first power module U1. In one specific embodiment, the resistance of the first resistor R1 and/or the second resistor R2 is adjusted such that the first power module U1 is at the input voltage VINRising to 70-80% VINTime, starting voltage VENThe enable threshold of the first power module U1 is reached to begin outputting voltage.
In particular, with an input voltage VINUp to 80% VINThe description will be given by way of example. Setting the quiescent operating point of the RC circuit so that the voltage is initiated
Namely, the resistance value of the first resistor R1 and/or the second resistor R2 is adjusted, and the resistance value ratio of the first resistor R1 to the second resistor R2 satisfies
Referring to fig. 3, an input voltage VINIs slowly increased and the input voltage V isINFluctuations can occur before stabilization is achieved. As shown in the curve (r), at the input voltage VINThe enable threshold of the first power module U1 is reached at a lower level, enabling the first power module U1 to output a voltage VOUTAt this time, the output voltage VOUTIs subjected to an input voltage VINThe influence of the fluctuation also fluctuates, and the output voltage VOUTThe power-on is slow, and the stable operation of the rear-stage circuit of the first power module U1 is affected. E.g. curve 2The resistance of the first resistor R1 and/or the second resistor R2 is adjusted to provide the input voltage VINUp to 80% VINThe first power supply module U1 can output the voltage signal and filter the input voltage VINAt this time, the output voltage V of the first power module U1OUTThe power-on speed is high, the output is stable, and the input voltage V is reducedINTo the output voltage V due to fluctuationOUTThe resulting effect causes the first power module U1 to stabilize the output. Meanwhile, 20-30% of V is reservedINThe voltage margin of (2) avoids the input voltage VINThe fluctuations cause problems with output shutdown. It is understood that the enabling threshold of the first power module U1 can be adaptively adjusted according to actual requirements, i.e. the input voltage VINThe range of the rising voltage can be 70-80% VINAny value within (a) or (b) may be in other ranges.
In some specific embodiments, the power-on sequence of the external power modules connected by the RC circuit is controlled, so as to control the power-on timing of the first power module U1, and the first capacitor C1 is used to prolong or shorten the power-on time of the first power module U1, so as to amplify the starting voltage VENWhen the external power supply is nearly exhausted, the problem of data loss caused by repeated power-on and power-off of the circuit can be avoided.
In some embodiments, referring to FIG. 2, the stabilizing circuit 200 is electrically connected to the second port of the first power module U1. The voltage stabilizing circuit 200 includes: the power supply module comprises a third resistor R3, a fourth resistor R4 and a second capacitor C2, wherein the third resistor R3 and the fourth resistor R4 are connected in series, a second capacitor C2 and the third resistor R3 are connected in parallel, and a second port of the first power supply module U1 is electrically connected with a series node of the third resistor R3 and the fourth resistor R4. Specifically, the second port of the first power module U1 is the port represented by the third pin, and the first power module U1 outputs a stable voltage by adjusting the resistance of the third resistor R3 and/or the fourth resistor R4.
In a specific embodiment, the start-up voltage control circuit further comprises: a second power module electrically connected to the first power module U1 for supplying power to the first power moduleTwo power supply modules for providing input voltage VIN. Specifically, the output voltage V of the first power module U1 is setOUTWhen the voltage is 0.6(1+ R3/R4), 3.3V, that is, the resistance of the third resistor R3 and/or the fourth resistor R4 is adjusted, so that the first power module U1 outputs a stable 3.3V voltage, and stable operation of the subsequent stage circuit is ensured. It will be appreciated that the output voltage V of the first power module U1OUTThe value of (A) can be adaptively adjusted according to actual needs.
In some embodiments, referring to fig. 2, the starting voltage control circuit further includes: the first filter circuit 300, the first filter circuit 300 is electrically connected with the voltage regulating circuit 100. The first filter circuit 300 includes: the capacitor comprises a third capacitor C3, a fourth capacitor C4, a fifth resistor R5 and a fifth capacitor C5, wherein the third capacitor C3 is connected with the fourth capacitor C4 in parallel, one end of the fifth resistor R5 is electrically connected with the fourth capacitor C4, one end of the fifth capacitor C5 is electrically connected with the other end of the fifth resistor R5, and the other end of the fifth capacitor C5 is grounded. The first filter circuit 300 filters the ac voltage input by the second power module, so as to ensure the circuit safety.
In some embodiments, referring to fig. 2, the starting voltage control circuit further includes: a second filter circuit 400, the second filter circuit 400 comprising: a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8. One end of the sixth capacitor C6 is electrically connected to the voltage stabilizing circuit 200, and the other end of the sixth capacitor C6 is grounded; one end of the seventh capacitor C7 is electrically connected to the voltage stabilizing circuit 200, and the other end of the seventh capacitor C7 is grounded; one end of the eighth capacitor C8 is electrically connected to the voltage stabilizing circuit 200, and the other end of the eighth capacitor C8 is grounded. The sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8 are connected in parallel, one end of a parallel node of the sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8 is grounded, and the other end of the parallel node is electrically connected with the third resistor R3. The second filter circuit 400 outputs the voltage V to the first power module U1OUTAnd filtering is carried out to ensure the stable work of the post-stage circuit.
In one specific embodiment, the second power module outputs 12V AC voltage to provide the input voltage V for the first power module U1INAdjusting the resistance of the first resistor R1 and/or the second resistor R2 to make the first resistor R1 and/or the second resistor R2 to be the sameThe resistance ratio of the R1 to the second resistor R2 satisfies
Thereby filtering the input voltage V of the second power supply moduleINThe first power supply module U1 is at the input voltage VINRising to 70-80% VINThe output is then enabled so that the first power module U1 powers up quickly and outputs smoothly. Adjusting the resistance of the third resistor R3 and/or the fourth resistor R4 to make the output voltage V of the first power module U1OUTThe voltage-stabilizing output of the first power module U1 is realized, the stable work of a rear-stage circuit is ensured, the circuit data loss caused by the instant voltage fluctuation of the second power module during starting is avoided, and the problem that the voltage is hooked back when the first power module is powered on is solved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A start-up voltage control circuit, comprising:
the first power supply module is provided with a first port and a second port;
the voltage regulating circuit is used for regulating the starting voltage of the first power supply module and is electrically connected with the first port;
wherein the voltage regulation circuit comprises: the circuit comprises a first resistor, a second resistor and a first capacitor;
the first resistor and the second resistor are connected in series, one end of the first capacitor is electrically connected with a series node of the first resistor and the second resistor, the other end of the first capacitor is grounded, and the series node is electrically connected with the first port;
and setting the starting voltage of the first power supply module by adjusting the resistance value of the first resistor and/or the second resistor.
2. The start-up voltage control circuit of claim 1, further comprising: and the voltage stabilizing circuit is used for controlling the first power supply module to output stable voltage, and is electrically connected with the second port.
3. The start-up voltage control circuit of claim 2, wherein the voltage regulator circuit comprises:
a third resistor;
a fourth resistor, the fourth resistor and the third resistor being connected in series;
a second capacitor connected in parallel with the third resistor;
a series node of the third resistor and the fourth resistor is electrically connected to the second port;
and the first power supply module is controlled to output stable voltage by adjusting the resistance value of the third resistor and/or the fourth resistor.
4. The startup voltage control circuit according to any one of claims 2 or 3, said first port being an enable port of said first power supply module.
5. The start-up voltage control circuit of claim 4, further comprising: the first filter circuit is electrically connected with the voltage regulating circuit.
6. The start-up voltage control circuit of claim 5, wherein the first filter circuit comprises:
a third capacitor;
a fourth capacitor connected in parallel with the third capacitor;
one end of the fifth resistor is electrically connected with the fourth capacitor;
one end of the fifth capacitor is electrically connected with the other end of the fifth resistor, and the other end of the fifth capacitor is grounded;
wherein a series node of the fifth resistor and the fifth capacitor is electrically connected to the first resistor.
7. The start-up voltage control circuit of claim 4, further comprising: and the second filter circuit is electrically connected with the voltage stabilizing circuit.
8. The start-up voltage control circuit of claim 7, wherein the second filter circuit comprises:
one end of the sixth capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the sixth capacitor is grounded;
one end of the seventh capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the seventh capacitor is grounded;
and one end of the eighth capacitor is electrically connected with the voltage stabilizing circuit, and the other end of the eighth capacitor is grounded.
9. The starting voltage control circuit according to any one of claims 5 to 8, further comprising: a second power supply module;
the second power supply module is electrically connected with the first power supply module and used for providing power for the first power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069109.8U CN212515515U (en) | 2020-06-11 | 2020-06-11 | Start voltage control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021069109.8U CN212515515U (en) | 2020-06-11 | 2020-06-11 | Start voltage control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212515515U true CN212515515U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021069109.8U Active CN212515515U (en) | 2020-06-11 | 2020-06-11 | Start voltage control circuit |
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|---|---|
| CN (1) | CN212515515U (en) |
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2020
- 2020-06-11 CN CN202021069109.8U patent/CN212515515U/en active Active
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