CN218633321U - Output voltage dicyclo steady voltage protection circuit - Google Patents
Output voltage dicyclo steady voltage protection circuit Download PDFInfo
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- CN218633321U CN218633321U CN202223061514.7U CN202223061514U CN218633321U CN 218633321 U CN218633321 U CN 218633321U CN 202223061514 U CN202223061514 U CN 202223061514U CN 218633321 U CN218633321 U CN 218633321U
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Abstract
The utility model discloses an output voltage dicyclo steady voltage protection circuit, through setting up one-level steady voltage ring, second grade steady voltage ring and detector form second grade steady voltage protection circuit, the realization is to the two-stage steady voltage protection of circuit, thereby make when first steady voltage ring circuit leads to circuit work unusual because the device damages, second steady voltage ring operation carries out voltage stabilization control to the circuit, can avoid exporting the problem of too high damage consumer, and need not realize steady voltage protection through the mode that sets up the anti-flowing backward diode, thereby when satisfying the not impaired of protection device, improve power efficiency and reduce cost.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to an output voltage dicyclo steady voltage protection circuit.
Background
In parallel operation application of switching power supplies outputting low voltage and large current, a voltage stabilizing protection circuit is usually provided for controlling the loop output voltage in a low voltage state. Meanwhile, in order to prevent the problem of output overvoltage backflow, a backflow prevention diode is usually added in the circuit to prevent the output overvoltage backflow. However, the backflow prevention diode is added at the output, so that the working efficiency of the circuit is reduced, and the size and the material cost of the power supply are increased. Therefore, in the current parallel operation application of the switching power supply, the requirements of improving the power supply efficiency and reducing the cost while protecting the device from damage are difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: an output voltage double-ring voltage stabilization protection circuit improves power supply efficiency and reduces cost while protecting devices from damage.
In order to solve the technical problem, the utility model discloses a technical scheme be:
an output voltage double-ring voltage stabilization protection circuit comprises a primary voltage stabilization ring, a secondary voltage stabilization ring and a detector;
the output end of the primary voltage stabilizing ring is connected with the input end of the detector and the output end of the secondary voltage stabilizing ring respectively;
the voltage detection end of the primary voltage stabilizing ring is connected with the voltage detection end of the secondary voltage stabilizing ring;
and the voltage detection end of the primary voltage stabilizing ring and the voltage detection end of the secondary voltage stabilizing ring have different voltage detection threshold values.
Further, the secondary voltage stabilizing ring comprises a three-terminal reference voltage source, a photoelectric coupler, a first resistor and a second resistor;
the first output end of the photoelectric coupler is connected with the output end of the primary voltage stabilizing ring; the second output end of the photoelectric coupler is connected with the negative electrode of the three-end reference voltage source; the second input end of the photoelectric coupler is used for connecting a power supply;
a reference electrode of the three-terminal reference voltage source is respectively connected with one end of the first resistor and one end of the second resistor; the anode of the three-terminal reference voltage source is connected with the other end of the second resistor;
one end of the first resistor is connected with the voltage detection end of the primary voltage stabilizing ring, and the other end of the first resistor is used for being connected with a voltage control signal.
Further, the primary voltage stabilizing ring comprises a first comparator;
the same-direction input end of the first comparator is used for inputting a reference voltage; the reverse input end of the first comparator is connected with the voltage detection end of the secondary voltage stabilizing ring; and the output end of the first comparator is connected with the output end of the secondary voltage stabilizing ring.
Further, the primary voltage stabilizing ring further comprises a third resistor, a fourth resistor and a first capacitor;
one end of the third resistor is used for inputting a reference voltage and is connected with one end of the first capacitor; the other end of the third resistor is connected with one end of the fourth resistor;
the other end of the fourth resistor is connected with the homodromous input end of the first comparator;
the other end of the first capacitor is grounded.
Further, the primary voltage stabilizing ring further comprises a fifth resistor and a second capacitor;
one end of the fifth resistor is connected with one end of the second capacitor, the other end of the third resistor and one end of the fourth resistor respectively;
the other end of the fifth resistor is connected with the other end of the second capacitor;
the other end of the second capacitor is grounded.
Further, the primary voltage stabilizing ring further comprises a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor and a third capacitor;
one end of the sixth resistor is connected with the voltage detection end of the secondary voltage stabilizing ring; the other end of the sixth resistor is respectively connected with one end of the seventh resistor, one end of the third capacitor and one end of the ninth resistor;
the other end of the seventh resistor is connected with one end of the eighth resistor; the other end of the eighth resistor is connected with the other end of the third capacitor;
the other end of the ninth resistor is connected with the inverting input end of the first comparator.
Further, the primary voltage stabilizing ring further comprises a tenth resistor, a fourth capacitor and a fifth capacitor;
one end of the fourth capacitor is connected with one end of the fifth capacitor and the reverse input end of the first comparator respectively; the other end of the fourth capacitor is connected with one end of the tenth resistor;
the other end of the tenth resistor is connected with the other end of the fifth capacitor and the output end of the first comparator respectively.
Further, the primary voltage stabilizing ring further comprises a first diode and an eleventh resistor;
the anode of the first diode is connected with the voltage detection end of the secondary voltage stabilizing ring;
the negative electrode of the first diode is connected with one end of the eleventh resistor;
the other end of the eleventh resistor is connected with the output end of the first comparator.
Further, the primary voltage stabilizing ring further comprises a clamping diode;
the negative electrode of the clamping diode is connected with the output end of the first comparator; the positive electrode of the clamping diode is grounded.
Further, the secondary voltage stabilizing ring further comprises a twelfth resistor;
one end of the twelfth resistor is connected with the second input end of the photoelectric coupler;
the other end of the twelfth resistor is connected with a power supply.
The beneficial effects of the utility model reside in that: through setting up one-level voltage-stabilizing ring, second grade voltage-stabilizing ring and detector form second grade voltage-stabilizing protection circuit, realize the two-stage voltage-stabilizing protection to the circuit, thereby make when first voltage-stabilizing ring circuit leads to circuit work abnormal because the device damages, the second voltage-stabilizing ring is worked and is carried out voltage-stabilizing control to the circuit, can avoid exporting too high damage consumer's problem, and need not realize voltage-stabilizing protection through the mode that sets up the diode that prevents flowing backward, thereby when satisfying the protection device not impaired, improve power efficiency and reduce cost.
Drawings
Fig. 1 is a schematic diagram of an output voltage dual-ring voltage stabilizing protection circuit according to an embodiment of the present invention;
description of reference numerals:
1. a primary voltage stabilizing ring; 2. a secondary voltage stabilizing ring; 3. a detector; r123 and a first resistor; r117, a second resistor; r151 and a third resistor; r234, a fourth resistor; r229, a fifth resistor; r231, sixth resistance; r232 and a seventh resistor; r233, eighth resistor; r235 and a ninth resistor; r236, tenth resistance; r198, eleventh resistor; r149 and a twelfth resistor; c59, a first capacitor; c220 and a second capacitor; c221 and a third capacitor; c222, a fourth capacitor; c223, a fifth capacitor; VADJ, reference voltage; d9, a first diode; d204, a clamping diode; VFB, drive control signal; VO, voltage control signal; VS, power supply; ZD1, a three-terminal reference voltage source; ISI1001-A/B, photoelectric coupler; U201-B, a first comparator; VFB _ V and a voltage threshold value of the first-stage voltage stabilizing ring; VFB _ V1 and a voltage threshold value of a secondary voltage stabilizing loop.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, an output voltage dual-ring voltage stabilization protection circuit includes a primary voltage stabilization ring, a secondary voltage stabilization ring, and a detector;
the output end of the primary voltage stabilizing ring is respectively connected with the input end of the detector and the output end of the secondary voltage stabilizing ring;
the voltage detection end of the primary voltage stabilizing ring is connected with the voltage detection end of the secondary voltage stabilizing ring;
and the voltage detection end of the primary voltage stabilizing ring and the voltage detection end of the secondary voltage stabilizing ring have different voltage detection threshold values.
As can be seen from the above description, the utility model has the advantages that: through setting up one-level voltage-stabilizing ring, second grade voltage-stabilizing ring and detector form second grade voltage-stabilizing protection circuit, realize the two-stage voltage-stabilizing protection to the circuit, thereby make when first voltage-stabilizing ring circuit leads to circuit work abnormal because the device damages, the second voltage-stabilizing ring is worked and is carried out voltage-stabilizing control to the circuit, can avoid exporting too high damage consumer's problem, and need not realize voltage-stabilizing protection through the mode that sets up the diode that prevents flowing backward, thereby when satisfying the protection device not impaired, improve power efficiency and reduce cost.
Further, the secondary voltage stabilizing ring comprises a three-terminal reference voltage source, a photoelectric coupler, a first resistor and a second resistor;
the first output end of the photoelectric coupler is connected with the output end of the primary voltage stabilizing ring; the second output end of the photoelectric coupler is connected with the negative electrode of the three-end reference voltage source; the second input end of the photoelectric coupler is used for connecting a power supply;
a reference electrode of the three-terminal reference voltage source is respectively connected with one end of the first resistor and one end of the second resistor; the anode of the three-terminal reference voltage source is connected with the other end of the second resistor;
one end of the first resistor is connected with the voltage detection end of the primary voltage stabilizing ring, and the other end of the first resistor is used for being connected with a voltage control signal.
According to the above description, the reference voltage source, the photoelectric coupler, the first resistor and the second capacitor bank form the second voltage stabilizing ring, and the voltage detection threshold of the second voltage stabilizing ring is set through the first resistor, the second capacitor bank and the voltage control signal, so that the second voltage stabilizing ring is enabled to act only when the detected voltage value reaches the voltage detection threshold, the circuit voltage stabilization control is performed, and the circuit stability is improved.
Further, the primary voltage stabilizing ring comprises a first comparator;
the same-direction input end of the first comparator is used for inputting a reference voltage; the reverse input end of the first comparator is connected with the voltage detection end of the secondary voltage stabilizing ring; and the output end of the first comparator is connected with the output end of the second-stage voltage stabilizing ring.
As can be seen from the above description, by providing the first comparator, the reference voltage and the detection voltage are input from the input terminal of the first comparator, and the voltage stabilization control is performed by comparing the reference voltage and the detection voltage to output the corresponding voltage values.
Further, the primary voltage stabilizing ring further comprises a third resistor, a fourth resistor and a first capacitor;
one end of the third resistor is used for inputting a reference voltage and is connected with one end of the first capacitor; the other end of the third resistor is connected with one end of the fourth resistor;
the other end of the fourth resistor is connected with the equidirectional input end of the first comparator;
the other end of the first capacitor is grounded.
As can be seen from the above description, the voltage dividing circuit of the first voltage stabilizing ring is formed by the third resistor, the fourth resistor and the first capacitor, so as to provide a stable reference voltage for the first comparator.
Further, the primary voltage stabilizing ring further comprises a fifth resistor and a second capacitor;
one end of the fifth resistor is connected with one end of the second capacitor, the other end of the third resistor and one end of the fourth resistor respectively;
the other end of the fifth resistor is connected with the other end of the second capacitor;
the other end of the second capacitor is grounded.
According to the above description, the fifth resistor and the second capacitor form the filter circuit of the first voltage stabilizing ring, so that the input reference voltage is filtered, and the signal precision and stability are improved.
Further, the primary voltage stabilizing ring further comprises a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor and a third capacitor;
one end of the sixth resistor is connected with the voltage detection end of the secondary voltage stabilizing ring; the other end of the sixth resistor is respectively connected with one end of the seventh resistor, one end of the third capacitor and one end of the ninth resistor;
the other end of the seventh resistor is connected with one end of the eighth resistor; the other end of the eighth resistor is connected with the other end of the third capacitor;
the other end of the ninth resistor is connected with the inverting input end of the first comparator.
As can be seen from the above description, by providing the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, and the third capacitor, voltage division and filtering are performed on the voltage sampling signal input by the inverting input terminal of the first voltage regulator loop circuit, so that the accuracy and stability of the signal input by the inverting input terminal are improved.
Further, the primary voltage stabilizing ring further comprises a tenth resistor, a fourth capacitor and a fifth capacitor;
one end of the fourth capacitor is connected with one end of the fifth capacitor and the reverse input end of the first comparator respectively; the other end of the fourth capacitor is connected with one end of the tenth resistor;
the other end of the tenth resistor is connected with the other end of the fifth capacitor and the output end of the first comparator respectively.
As can be seen from the above description, the tenth resistor, the fourth capacitor and the fifth capacitor are arranged to form a loop adjusting resistor capacitor, so that the speed of loop feedback can be adjusted.
Furthermore, the primary voltage stabilizing ring further comprises a first diode and an eleventh resistor;
the anode of the first diode is connected with the voltage detection end of the secondary voltage stabilizing ring;
the negative electrode of the first diode is connected with one end of the eleventh resistor;
the other end of the eleventh resistor is connected with the output end of the first comparator.
As can be seen from the above description, the pull-down diode and the pull-down resistor are respectively arranged in the first diode and the eleventh resistor to form the loop output, so as to realize the pull-down effect on the loop output voltage, and the operational amplifier output can pull down the loop output signal through the first diode and the eleventh resistor, thereby adjusting the drive to change the output voltage.
Further, the primary voltage stabilizing ring further comprises a clamping diode;
the negative electrode of the clamping diode is connected with the output end of the first comparator; the positive electrode of the clamping diode is grounded.
As is apparent from the above description, the negative voltage clamp diode is formed by providing the clamp diode and connecting the negative electrode of the clamp diode to the output terminal of the first comparator.
Further, the secondary voltage stabilizing ring further comprises a twelfth resistor;
one end of the twelfth resistor is connected with the second input end of the photoelectric coupler;
the other end of the twelfth resistor is connected with a power supply.
As can be seen from the above description, the twelfth resistor is disposed at the second input terminal of the photoelectric coupler, so that the voltage input by the power supply is pulled down to the voltage required by the photoelectric coupler, and the photoelectric coupler operates stably.
The output voltage double-loop voltage stabilization protection circuit can be suitable for a switch circuit with voltage stabilization requirements, a two-stage voltage stabilization loop is formed by two operational amplifiers, two-stage voltage stabilization protection is formed, the stability of the circuit is improved, and the following description is given through a specific implementation mode:
example one
Referring to fig. 1, an output voltage dual-ring voltage stabilization protection circuit includes a primary voltage stabilization ring 1, a secondary voltage stabilization ring 2, and a detector 3; the output end of the primary voltage stabilizing ring 1 is respectively connected with the input end of the detector 3 and the output end of the secondary voltage stabilizing ring 2; the voltage detection end of the primary voltage stabilizing ring 1 is connected with the voltage detection end of the secondary voltage stabilizing ring 2; the voltage detection end of the primary voltage stabilizing ring 1 and the voltage detection end of the secondary voltage stabilizing ring 2 have different voltage detection threshold values;
the secondary voltage stabilizing ring 2 comprises a three-terminal reference voltage source ZD1, a photoelectric coupler ISI1001-A/B, a first resistor R123, a second resistor R117 and a twelfth resistor R149; the first output end of the photoelectric coupler ISI1001-A/B is connected with the output end of the primary voltage stabilizing ring 1, namely, is connected with a driving control signal VFBVFB; a second output end of the photoelectric coupler ISI1001-A/B is connected with a negative electrode of the three-terminal reference voltage source ZD 1; the reference pole of the three-terminal reference voltage source ZD1 is connected to one end of the first resistor R123 and one end of the second resistor R117 respectively; the anode of the three-terminal reference voltage source ZD1 is connected with the other end of the second resistor R117; one end of the first resistor R123 is connected with the voltage detection end of the primary voltage stabilizing ring 1, and the other end of the first resistor R123 is used for connecting a voltage control signal VO; one end of the twelfth resistor R149 is connected with the second input end of the photoelectric coupler ISI 1001-A/B; the other end of the twelfth resistor R149 is connected with a power source VS (+ 12 VS); the secondary voltage stabilizing ring 2 is also provided with other peripheral devices which are feedback circuits of the secondary voltage stabilizing ring 2;
the voltage detection threshold of second grade voltage-stabilizing ring 2 is higher than the voltage detection threshold of one-level voltage-stabilizing ring 1, if will the voltage detection threshold of second grade voltage-stabilizing ring 2 sets up to 26V, and is specific: setting according to the values of the first resistor R123, the second resistor R117 and the voltage control signal VO; if the voltage detection threshold of the secondary regulator ring 2 is set to be VFB _ V1, VFB _ V1= R117/(R117 + R123) × VO;
the primary voltage stabilizing ring 1 comprises a first comparator U201-B, a third resistor R151, a fourth resistor R234, a fifth resistor R229, a sixth resistor R231, a seventh resistor R232, an eighth resistor R233, a ninth resistor R235, a tenth resistor R236, an eleventh resistor R198, a first capacitor C59, a second capacitor C220, a third capacitor C221, a fourth capacitor C222, a fifth capacitor C223, a first diode D9 and a diode clamp D204; specifically, the method comprises the following steps:
the homodromous input end of the first comparator U201-B is used for inputting a reference voltage VADJ, and the reference voltage VADJ is a voltage reference given by the single chip microcomputer; the reverse input end of the first comparator U201-B is connected with the voltage detection end of the secondary voltage stabilizing ring 2; the output end of the first comparator U201-B is connected with the output end of the secondary voltage stabilizing ring 2;
one end of the third resistor R151 is used for inputting a reference voltage VADJ, and is connected to one end of the first capacitor C59; the other end of the third resistor R151 is connected with one end of a fourth resistor R234; the other end of the fourth resistor R234 is connected with the equidirectional input end of the first comparator U201-B; the other end of the first capacitor C59 is grounded; one end of the fifth resistor R229 is connected to one end of the second capacitor C220, the other end of the third resistor R151, and the one end of the fourth resistor R234, respectively; the other end of the fifth resistor R229 is connected to the other end of the second capacitor C220; the other end of the second capacitor C220 is grounded; dividing and filtering a reference voltage VADJ at the same-direction input end of the first comparator U201-B;
one end of the sixth resistor R231 is connected with the voltage detection end of the secondary voltage stabilizing ring 2; the other end of the sixth resistor R231 is connected to one end of the seventh resistor R232, one end of the third capacitor C221, and one end of the ninth resistor R235, respectively; the other end of the seventh resistor R232 is connected with one end of the eighth resistor R233; the other end of the eighth resistor R233 is connected to the other end of the third capacitor C221; the other end of the ninth resistor R235 is connected with the inverting input end of the first comparator U201-B; dividing and filtering a voltage detection threshold VFB _ V at the inverting input of the first comparator U201-B;
the primary voltage stabilizing ring 1 further comprises a tenth resistor R236, a fourth capacitor C222 and a fifth capacitor C223; one end of the fourth capacitor C222 is connected to one end of the fifth capacitor C223 and the inverting input terminal of the first comparator U201-B, respectively; the other end of the fourth capacitor C222 is connected to one end of the tenth resistor R236; the other end of the tenth resistor R236 is connected with the other end of the fifth capacitor C223 and the output end of the first comparator U201-B respectively; adjusting a resistance capacitance for a loop of the first comparator U201-B;
the primary voltage stabilizing ring 1 further comprises a first diode D9 and an eleventh resistor R198; the positive electrode of the first diode D9 is connected with the voltage detection end of the secondary voltage stabilizing ring 2; the negative electrode of the first diode D9 is connected with one end of the eleventh resistor R198; the other end of the eleventh resistor R198 is connected with the output end of the first comparator U201-B; for controlling the drive control signal VFB; the cathode of the clamping diode D204 is connected with the output end of the first comparator U201-B; the anode of the clamping diode D204 is grounded; the driving control signal VFB is pulled down through the first diode D9 and the eleventh resistor R198, so that the driving change output voltage is adjusted;
the detector and the first comparator U201-B are integrated on the same chip, the fifth pin, the sixth pin and the seventh pin of the chip are used as control input and output, the fourth pin and the eighth pin of the chip are used as power supply input and are respectively connected with a +5VS power supply source and a-12 VS power supply source; the driving control signal VFB is a common loop output signal of the first voltage stabilizing ring and the second voltage stabilizing ring and is connected to a loop feedback pin of the chip;
the specific principle of the circuit is as follows:
if the output normal voltage stabilization voltage is 24V, setting the voltage threshold of the secondary voltage stabilization ring 2 to be 26V; when the power supply works normally, only the first voltage stabilizing ring works, and the second voltage stabilizing ring 2 does not work; when the primary voltage stabilizing ring 1 works normally, the potential of a seventh pin of the first comparator U201-B is lower than +5VS, and at the moment, the photoelectric coupler ISI1001-A/B and the diode in the secondary voltage stabilizing ring 2 are cut off, namely the secondary voltage stabilizing ring 2 does not work; and when the first-stage voltage-stabilizing ring 1 is in fault open loop, the potential of a seventh pin of the first comparator U201-B is higher than or equal to +5VS, so that the voltage threshold value reaches 26V, the second-stage voltage-stabilizing ring 2 works to control the output voltage to be in a required setting voltage, and the first-stage voltage-stabilizing ring 1 is prevented from outputting overlarge voltage after being in open loop.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. An output voltage double-ring voltage stabilization protection circuit is characterized by comprising a primary voltage stabilization ring, a secondary voltage stabilization ring and a detector;
the output end of the primary voltage stabilizing ring is respectively connected with the input end of the detector and the output end of the secondary voltage stabilizing ring;
the voltage detection end of the primary voltage stabilizing ring is connected with the voltage detection end of the secondary voltage stabilizing ring;
and the voltage detection end of the primary voltage stabilizing ring and the voltage detection end of the secondary voltage stabilizing ring have different voltage detection threshold values.
2. The output voltage double-loop voltage stabilization protection circuit of claim 1, wherein the secondary voltage stabilization loop comprises a three-terminal reference voltage source, a photocoupler, a first resistor and a second resistor;
the first output end of the photoelectric coupler is connected with the output end of the primary voltage stabilizing ring; the second output end of the photoelectric coupler is connected with the negative electrode of the three-end reference voltage source; the second input end of the photoelectric coupler is used for connecting a power supply;
a reference pole of the three-terminal reference voltage source is respectively connected with one end of the first resistor and one end of the second resistor; the anode of the three-terminal reference voltage source is connected with the other end of the second resistor;
one end of the first resistor is connected with the voltage detection end of the primary voltage stabilizing ring, and the other end of the first resistor is used for being connected with a voltage control signal.
3. The output voltage dual-ring regulated protection circuit of claim 1, wherein said primary regulator ring comprises a first comparator;
the same-direction input end of the first comparator is used for inputting a reference voltage; the reverse input end of the first comparator is connected with the voltage detection end of the secondary voltage stabilizing ring; and the output end of the first comparator is connected with the output end of the second-stage voltage stabilizing ring.
4. The dual-ring voltage regulation protection circuit of claim 3, wherein the primary voltage regulation ring further comprises a third resistor, a fourth resistor and a first capacitor;
one end of the third resistor is used for inputting a reference voltage and is connected with one end of the first capacitor; the other end of the third resistor is connected with one end of the fourth resistor;
the other end of the fourth resistor is connected with the equidirectional input end of the first comparator;
the other end of the first capacitor is grounded.
5. The output voltage double-ring voltage stabilization protection circuit according to claim 4, wherein the primary voltage stabilization ring further comprises a fifth resistor and a second capacitor;
one end of the fifth resistor is connected with one end of the second capacitor, the other end of the third resistor and one end of the fourth resistor respectively;
the other end of the fifth resistor is connected with the other end of the second capacitor;
the other end of the second capacitor is grounded.
6. The output voltage double-ring voltage stabilization protection circuit according to claim 3, wherein the primary voltage stabilization ring further comprises a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor and a third capacitor;
one end of the sixth resistor is connected with the voltage detection end of the secondary voltage stabilizing ring; the other end of the sixth resistor is respectively connected with one end of the seventh resistor, one end of the third capacitor and one end of the ninth resistor;
the other end of the seventh resistor is connected with one end of the eighth resistor; the other end of the eighth resistor is connected with the other end of the third capacitor;
the other end of the ninth resistor is connected with the inverting input end of the first comparator.
7. The output voltage double-ring voltage stabilization protection circuit according to claim 3, wherein the primary voltage stabilization ring further comprises a tenth resistor, a fourth capacitor and a fifth capacitor;
one end of the fourth capacitor is connected with one end of the fifth capacitor and the reverse input end of the first comparator respectively; the other end of the fourth capacitor is connected with one end of the tenth resistor;
the other end of the tenth resistor is connected with the other end of the fifth capacitor and the output end of the first comparator respectively.
8. The output voltage dual-ring regulated protection circuit of claim 3, wherein said primary regulator ring further comprises a first diode and an eleventh resistor;
the anode of the first diode is connected with the voltage detection end of the secondary voltage stabilizing ring;
the negative electrode of the first diode is connected with one end of the eleventh resistor;
the other end of the eleventh resistor is connected with the output end of the first comparator.
9. The dual-ring output voltage regulation protection circuit of claim 3, wherein the primary regulation ring further comprises a clamping diode;
the negative electrode of the clamping diode is connected with the output end of the first comparator; the positive electrode of the clamping diode is grounded.
10. The output voltage dual-ring regulated protection circuit of claim 2, wherein said secondary regulator ring further comprises a twelfth resistor;
one end of the twelfth resistor is connected with the second input end of the photoelectric coupler;
the other end of the twelfth resistor is connected with a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061514.7U CN218633321U (en) | 2022-11-17 | 2022-11-17 | Output voltage dicyclo steady voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061514.7U CN218633321U (en) | 2022-11-17 | 2022-11-17 | Output voltage dicyclo steady voltage protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218633321U true CN218633321U (en) | 2023-03-14 |
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| CN202223061514.7U Active CN218633321U (en) | 2022-11-17 | 2022-11-17 | Output voltage dicyclo steady voltage protection circuit |
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