CN217741548U - Series voltage-stabilizing switch power supply circuit - Google Patents
Series voltage-stabilizing switch power supply circuit Download PDFInfo
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- CN217741548U CN217741548U CN202221343207.5U CN202221343207U CN217741548U CN 217741548 U CN217741548 U CN 217741548U CN 202221343207 U CN202221343207 U CN 202221343207U CN 217741548 U CN217741548 U CN 217741548U
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Abstract
The utility model discloses a series voltage-stabilizing switching power supply circuit, including input filter rectifier circuit, high frequency transformer and output rectifier filter circuit, be equipped with primary winding, secondary winding and feedback winding in the high frequency transformer, primary winding, feedback winding link to each other with control chip U1, be equipped with first, second voltage stabilizing circuit behind the output rectifier filter circuit, be equipped with zener diode DF and series voltage stabilizing module Q51 in the first voltage stabilizing circuit, be connected with electric capacity E21, C51 and electric capacity E23, C52 between series voltage stabilizing module Q51 pin respectively; a farad capacitor power supply circuit is connected behind the first voltage stabilizing circuit, a farad capacitor CF, a resistor RF1 and a resistor RF2 are arranged in the farad capacitor power supply circuit, and the output end of the farad capacitor power supply circuit is connected with the single chip microcomputer control circuit. The utility model discloses ensure that output voltage is more stable, can provide the required energy of emergency treatment moreover when the outage.
Description
Technical Field
The utility model relates to a power supply circuit technical field especially relates to a series connection steady voltage switching power supply circuit.
Background
The power supply is a basic component in various products and equipment, and the stable and reliable power supply is a basis for reliable operation of various products and equipment. However, many common switching power supply circuits usually fluctuate or generate interference during operation, so that various products and devices are easily affected.
For example, in many single chip microcomputer control circuits, if a power supply circuit is unstable or interference is easy to occur, the single chip microcomputer control circuit is frequently halted, and normal operation is affected. Therefore, a more stable and reliable switching power supply circuit needs to be developed according to the requirements of the fields such as a single chip microcomputer control circuit and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the utility model is to provide a series connection steady voltage switch power supply circuit, through set up series connection type constant voltage power supply circuit and farad capacitance circuit in switch power supply circuit, the circuit can absorb external crosstalk, ensures that output voltage is more stable, can utilize the farad capacitance of large capacity to provide the required energy of emergency treatment for singlechip control circuit when the input outage moreover.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a series voltage-stabilizing switch power supply circuit comprises an input filter rectifying circuit, a high-frequency transformer and an output rectifier filtering circuit, wherein a primary winding, a secondary winding and a feedback winding are arranged in the high-frequency transformer, the primary winding is connected with the input filter rectifying circuit, the secondary winding is connected with the output rectifier filtering circuit, the primary winding and the feedback winding are further connected with a control chip U1, a first voltage stabilizing circuit and a second voltage stabilizing circuit are arranged behind the output rectifier filtering circuit, a voltage stabilizing diode DF and a series voltage stabilizing module Q51 are arranged in the first voltage stabilizing circuit, the negative end of the voltage stabilizing diode DF is connected with a first pin of the series voltage stabilizing module Q51, capacitors E21 and C51 which are connected in parallel are arranged between the first pin and a second pin of the series voltage stabilizing module Q51, and capacitors E23 and C52 which are connected in parallel are arranged between the second pin and a third pin of the series voltage stabilizing module Q51; a farad capacitor power supply circuit is connected behind the first voltage stabilizing circuit, a farad capacitor CF is arranged in the farad capacitor power supply circuit, one end of the farad capacitor CF is connected with a resistor RF1 and a resistor RF2 in parallel, and the output end of the farad capacitor power supply circuit is connected with the single chip microcomputer control circuit.
Further, a series regulator module Q52 is disposed in the second voltage regulator circuit, a capacitor E22 is disposed between a first pin and a second pin of the series regulator module Q52, and a capacitor C53 is disposed between a second pin and a third pin of the series regulator module Q51.
Furthermore, the first voltage stabilizing circuit and the second voltage stabilizing circuit are at least one group.
Furthermore, the capacity of the farad capacitor power supply circuit is more than 0.5F.
Further, one end of the feedback winding is connected with a second pin of the control chip U1 through a resistor R9 and a diode D2, a fourth pin of the control chip U1 is connected with an eighth pin through a resistor R7 and a resistor R8 which are connected in parallel, the eighth pin of the control chip U1 is connected with the anode of the diode D2 through a capacitor EC2, and a first pin of the control chip U1 is connected with the other end of the feedback winding through a resistor R12.
Furthermore, a fifth pin and a sixth pin of the control chip U1 are connected to one end of the primary winding, and a second pin of the control chip U1 is connected to the other end of the primary winding through a resistor R1.
Further, the model of the control chip U1 is LN1F15.
The utility model discloses following beneficial effect has:
1. the utility model discloses set up tandem type constant voltage power supply circuit and farad capacitor circuit in switching power supply circuit, compare with the switching power supply circuit direct output of simple and can absorb external crosstalk, ensure that output voltage is more stable, can utilize the farad capacitor of large capacity to provide the required energy of emergency treatment for single chip microcomputer control circuit when the input outage moreover.
2. The utility model discloses tandem type constant voltage power supply circuit includes two kinds at least, sets up zener diode, series voltage stabilizing module and multiunit electric capacity among one of them a set of tandem type constant voltage power supply circuit, and the stable output power that provides that can be better only sets up series voltage stabilizing module and electric capacity among another set of tandem type constant voltage power supply circuit, saves the cost under the prerequisite of satisfying the requirement.
Drawings
Fig. 1 is a schematic diagram of the series voltage-stabilizing switching power supply circuit of the present invention.
Description of the reference numerals:
1. the input of the filter rectifying circuit; 2. a high-frequency transformer; 21. a primary winding; 22. a secondary winding; 23. a feedback winding; 3. an output rectifying filter circuit; 4. a first voltage stabilizing circuit; 5. a second voltage stabilizing circuit; 6. farad capacitor power supply circuit.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific embodiments:
referring to fig. 1, the series voltage-stabilizing switching power supply circuit includes an input filter and rectifier circuit 1, a high-frequency transformer 2 and an output rectifier and filter circuit 3, wherein a primary winding 21, a secondary winding 22 and a feedback winding 23 are arranged in the high-frequency transformer 2, the primary winding 21 is connected with the input filter and rectifier circuit 1, the secondary winding 22 is connected with the output rectifier and filter circuit 3, the primary winding 21 and the feedback winding 23 are further connected with a control chip U1, a first voltage stabilizing circuit 4 and a second voltage stabilizing circuit 5 are arranged behind the output rectifier and filter circuit 3, a voltage stabilizing diode DF and a series voltage stabilizing module Q51 are arranged in the first voltage stabilizing circuit 4, a negative end of the voltage stabilizing diode DF is connected with a first pin of the series voltage stabilizing module Q51, capacitors E21 and C51 connected in parallel are arranged between the first pin and a second pin of the series voltage stabilizing module Q51, and capacitors E23 and C52 connected in parallel are arranged between the second pin and a third pin of the series voltage stabilizing module Q51; a farad capacitor power supply circuit 6 is connected behind the first voltage stabilizing circuit 4, and the capacity of the farad capacitor power supply circuit 6 is more than 0.5F and can be selected according to the power required by the circuit; and a farad capacitor CF is arranged in the farad capacitor power supply circuit 6, one end of the farad capacitor CF is connected with a resistor RF1 and a resistor RF2 in parallel, and the output end of the farad capacitor power supply circuit 6 is connected with the singlechip control circuit. The second voltage stabilizing circuit 5 is provided with a series voltage stabilizing module Q52, a capacitor E22 is arranged between a first pin and a second pin of the series voltage stabilizing module Q52, and a capacitor C53 is arranged between the second pin and a third pin of the series voltage stabilizing module Q51. The first voltage stabilizing circuit 4 and the second voltage stabilizing circuit 5 are at least one group, and multiple groups of outputs can be set according to requirements. The series regulator modules Q51 and Q52 may be mature commercial modules IC or may be self-made.
The during operation commercial power is through input filter rectifier circuit 1 filtering, rectification, restraines the electromagnetic noise and the clutter signal of input power, prevents to power interference, also can prevent simultaneously that power itself from producing high frequency clutter and disturbing to the electric wire netting, rectifies again after the filtering, obtains comparatively stable direct current voltage through high frequency transformer 2 and output rectifier filter circuit 3 again, then passes through first voltage stabilizing circuit 4, farad capacitor supply circuit 6 output more stable direct current voltage.
One end of the feedback winding 23 is connected with the second pin of the control chip U1 through a resistor R9 and a diode D2, the fourth pin of the control chip U1 is connected with the eighth pin through a resistor R7 and a resistor R8 which are connected in parallel, the eighth pin of the control chip U1 is connected with the anode of the diode D2 through a capacitor EC2, and the first pin of the control chip U1 is connected with the other end of the feedback winding 23 through a resistor R12. And a fifth pin and a sixth pin of the control chip U1 are connected with one end of the primary winding 21, and a second pin of the control chip U1 is connected with the other end of the primary winding 21 through a resistor R1.
The model of the control chip U1 is LN1F15. The control chip LN1F15 is a commercial control chip with high integration and low power consumption.
The above only is the detailed implementation manner of the present invention, not limiting the patent scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a series connection steady voltage switching power supply circuit, includes input filter rectifier circuit (1), high frequency transformer (2) and output rectifier filter circuit (3), be equipped with primary winding (21), secondary winding (22) and feedback winding (23) in high frequency transformer (2), primary winding (21) links to each other with input filter rectifier circuit (1), secondary winding (22) link to each other with output rectifier filter circuit (3), primary winding (21), feedback winding (23) link to each other with control chip U1 again, its characterized in that: a first voltage stabilizing circuit (4) and a second voltage stabilizing circuit (5) are arranged behind the output rectifying and filtering circuit (3), a voltage stabilizing diode DF and a series voltage stabilizing module Q51 are arranged in the first voltage stabilizing circuit (4), the negative end of the voltage stabilizing diode DF is connected with a first pin of the series voltage stabilizing module Q51, capacitors E21 and C51 which are connected in parallel are arranged between the first pin and a second pin of the series voltage stabilizing module Q51, and capacitors E23 and C52 which are connected in parallel are arranged between the second pin and a third pin of the series voltage stabilizing module Q51; a farad capacitor power supply circuit (6) is connected behind the first voltage stabilizing circuit (4), a farad capacitor CF is arranged in the farad capacitor power supply circuit (6), one end of the farad capacitor CF is connected with a resistor RF1 and a resistor RF2 in parallel, and the output end of the farad capacitor power supply circuit (6) is connected with the single chip microcomputer control circuit.
2. A series regulator switching power supply circuit according to claim 1, characterized in that: the second voltage stabilizing circuit (5) is internally provided with a series voltage stabilizing module Q52, a capacitor E22 is arranged between a first pin and a second pin of the series voltage stabilizing module Q52, and a capacitor C53 is arranged between a second pin and a third pin of the series voltage stabilizing module Q51.
3. A series regulator switching power supply circuit according to claim 1, characterized in that: the first voltage stabilizing circuit (4) and the second voltage stabilizing circuit (5) are at least one group.
4. A series regulator switching power supply circuit according to claim 1, characterized in that: the capacity of the farad capacitor power supply circuit (6) is more than 0.5F.
5. A series regulator switching power supply circuit according to claim 1, characterized in that: one end of the feedback winding (23) is connected with a second pin of the control chip U1 through a resistor R9 and a diode D2, a fourth pin of the control chip U1 is connected with an eighth pin through a resistor R7 and a resistor R8 which are connected in parallel, the eighth pin of the control chip U1 is connected with the anode of the diode D2 through a capacitor EC2, and a first pin of the control chip U1 is connected with the other end of the feedback winding (23) through a resistor R12.
6. A series regulator switching power supply circuit according to claim 5, characterized in that: and a fifth pin and a sixth pin of the control chip U1 are connected with one end of the primary winding (21), and a second pin of the control chip U1 is connected with the other end of the primary winding (21) through a resistor R1.
7. A series regulator switching power supply circuit according to claim 1, wherein: the model of the control chip U1 is LN1F15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343207.5U CN217741548U (en) | 2022-05-31 | 2022-05-31 | Series voltage-stabilizing switch power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343207.5U CN217741548U (en) | 2022-05-31 | 2022-05-31 | Series voltage-stabilizing switch power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217741548U true CN217741548U (en) | 2022-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221343207.5U Active CN217741548U (en) | 2022-05-31 | 2022-05-31 | Series voltage-stabilizing switch power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217741548U (en) |
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2022
- 2022-05-31 CN CN202221343207.5U patent/CN217741548U/en active Active
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