CN215646612U - Low-power switching power supply - Google Patents
Low-power switching power supply Download PDFInfo
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- CN215646612U CN215646612U CN202121716160.8U CN202121716160U CN215646612U CN 215646612 U CN215646612 U CN 215646612U CN 202121716160 U CN202121716160 U CN 202121716160U CN 215646612 U CN215646612 U CN 215646612U
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- resistor
- power supply
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- diode
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Abstract
The utility model discloses a low-power switching power supply which comprises a power supply circuit, wherein the power supply circuit is electrically connected with direct current and comprises a triode, a transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode and a second diode; an external clock pulse device is connected with the base electrode of a triode through a first resistor, the emitting electrode of the triode is grounded through a third resistor, the collecting electrode of the triode is connected with one end of a primary winding of a transformer, the other end of the primary winding of the transformer is connected with direct current, and a first diode and a fourth resistor are connected between the two ends of the primary winding of the transformer; the secondary winding of the transformer is connected with external electric equipment through a second diode; the effect is as follows: the circuit structure is greatly simplified, the transformer has no feedback, the winding only has an input winding and an output winding, and the conversion relation is very simple because only the input winding and the output winding are arranged, so that the characteristics of simple structure, small volume, low cost and the like of the switching power supply are realized.
Description
Technical Field
The utility model relates to the technical field of switching power supplies, in particular to a low-power switching power supply.
Background
A switching power supply, also called an exchange power supply or a switching converter, is a high-frequency power conversion device, and is a kind of power supply. With the development of power electronic technology, the technology of switching power supply is also continuously changing. At present, the switching power supply is widely applied with the characteristics of small size, light weight and high efficiency, and is an indispensable power supply mode for the rapid development of the electronic information industry at present.
However, the existing switching power supply has a complex structure, and the transformer generally comprises a plurality of groups of windings, so that the problems of complex structure, high cost, large volume and the like are caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a low power switching power supply, so as to overcome the defects of complex structure and large volume in the prior art.
The utility model provides the following technical scheme: a low-power switching power supply comprises a power supply circuit, wherein the power supply circuit is connected with external direct current and comprises a triode, a transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode and a second diode;
an external clock pulse device is connected with the base electrode of the triode through the first resistor, the base electrode is grounded through the second resistor, the emitting electrode of the triode is grounded through the third resistor, the collecting electrode of the triode is connected with one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected with the direct current, and the first diode and the fourth resistor are connected between the two ends of the primary winding of the transformer;
and the secondary winding of the transformer is used as an output end through the second diode and is used for being connected with external electric equipment.
As an alternative embodiment of the present application, the clock pulse device employs a microcontroller.
As an alternative embodiment of the present application, the clock pulse generated by the clock pulse device is 38 KHz.
As a preferred embodiment of the present application, the transformer is a micro high frequency transformer.
As a preferred embodiment of the application, the miniature high-frequency transformer is IVY-EE 8-01.
In a preferred embodiment of the present application, a capacitor C1 is further connected in parallel to two ends of the fourth resistor.
In a preferred embodiment of the present application, another capacitor C2 is further connected to two ends of the secondary winding of the transformer.
In a preferred embodiment of the present application, the capacitor C2 is an electrolytic capacitor, an anode of the electrolytic capacitor is connected to a cathode of the second diode, and a cathode of the electrolytic capacitor is grounded.
As a preferred embodiment of the application, the electric equipment comprises a voltage stabilizing chip and a communication chip.
By adopting the technical scheme, the method has the following advantages: the low-power switching power supply provided by the utility model has the advantages that the external clock pulse is utilized, the mode of amplifying and boosting the transformer to work through the triode is adopted, the circuit structure is greatly simplified, the transformer has no feedback, the winding only has an input winding and an output winding, and the conversion relation is very simple because only the input winding and the output winding are arranged, so that the characteristics of simple structure, small size, low cost and the like of the switching power supply are realized.
Drawings
In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic circuit diagram of a low power switching power supply according to an embodiment of the present invention.
Detailed Description
To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments, and the description herein does not mean that all the subject matters corresponding to the specific examples set forth in the embodiments are cited in the claims, and thus, the present invention is only taken as an example and the scope of protection of the present invention is not limited thereby.
Referring to fig. 1, the present embodiment provides a low power switching power supply, including a power supply circuit, the power supply circuit being connected to an external dc power, the power supply circuit including a triode, a transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, and a second diode;
an external clock pulse device is connected with the base electrode of the triode through the first resistor, the base electrode is grounded through the second resistor, the emitting electrode of the triode is grounded through the third resistor, the collecting electrode of the triode is connected with one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected with the direct current, and the first diode and the fourth resistor are connected between the two ends of the primary winding of the transformer;
and the secondary winding of the transformer is used as an output end through the second diode and is used for being connected with external electric equipment.
Wherein, the external direct current is provided by other direct current power supply equipment, which is represented by VDD 15; for example, a storage battery, etc.; the clock pulse microcontroller provides the clock pulse, and the clock pulse generated by the clock pulse device is 38KHz, so that a signal is given to the base electrode of the triode in a pulse mode; the electric equipment comprises a voltage stabilizing chip and a communication chip; for example, the communication chip includes an RS485 chip.
Specifically, the transformer adopts a miniature high-frequency transformer, the type of the miniature high-frequency transformer is IVY-EE8-01, and the miniature high-frequency transformer has the advantages of small volume, light weight, low cost, high performance and the like.
Further, in another embodiment, based on the foregoing solution, a capacitor C1 is further connected in parallel to two ends of the fourth resistor, and is combined with the connected first diode, i.e., D1 in the figure, so as to implement isolation between two ends of the primary winding of the transformer;
furthermore, another capacitor C2 is connected to two ends of the secondary winding of the transformer.
Specifically, the capacitor C2 is an electrolytic capacitor, an anode of the electrolytic capacitor is connected to a cathode of the second diode, and a cathode of the electrolytic capacitor is grounded; similarly, the cathode of the electrolytic capacitor is also connected with one end of the secondary winding of the transformer, and the other end of the secondary winding of the transformer is connected with the anode of the second diode.
The embodiment utilizes external clock pulse, and the mode of promoting the transformer work through triode amplification, makes circuit structure simplify greatly, and the transformer has no feedback, and the winding only has input and output winding, because only has input output winding, makes the conversion relation become very simple to realized switching power supply simple structure, small, characteristics such as with low costs.
When the scheme is applied, the scheme can be integrated to be applied to other device units or devices, for example, the scheme can be applied to a smart meter.
Finally, while the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (9)
1. A low-power switching power supply is characterized by comprising a power supply circuit, wherein the power supply circuit is connected with external direct current and comprises a triode, a transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode and a second diode;
an external clock pulse device is connected with the base electrode of the triode through the first resistor, the base electrode is grounded through the second resistor, the emitting electrode of the triode is grounded through the third resistor, the collecting electrode of the triode is connected with one end of the primary winding of the transformer, the other end of the primary winding of the transformer is connected with the direct current, and the first diode and the fourth resistor are connected between the two ends of the primary winding of the transformer;
and the secondary winding of the transformer is used as an output end through the second diode and is used for being connected with external electric equipment.
2. The low power switching power supply according to claim 1, wherein said clock means is a microcontroller.
3. The small power switching power supply according to claim 2, wherein said clock pulse means generates a clock pulse of 38 KHz.
4. A low power switching power supply according to any one of claims 1 to 3, wherein said transformer is a miniature high frequency transformer.
5. The small power switching power supply as claimed in claim 4, wherein the micro high frequency transformer is of type IVY-EE 8-01.
6. The low power switch power supply of claim 5, wherein a capacitor C1 is further connected in parallel across the fourth resistor.
7. The small-power switching power supply as claimed in claim 6, wherein another capacitor C2 is connected to both ends of the secondary winding of the transformer.
8. The low power switching power supply according to claim 7, wherein said capacitor C2 is an electrolytic capacitor, an anode of said electrolytic capacitor is connected to a cathode of said second diode, and a cathode of said electrolytic capacitor is grounded.
9. The low power switching power supply according to claim 1, wherein said power consuming device comprises a voltage regulator chip and a communication chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121716160.8U CN215646612U (en) | 2021-07-27 | 2021-07-27 | Low-power switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121716160.8U CN215646612U (en) | 2021-07-27 | 2021-07-27 | Low-power switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215646612U true CN215646612U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121716160.8U Active CN215646612U (en) | 2021-07-27 | 2021-07-27 | Low-power switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215646612U (en) |
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2021
- 2021-07-27 CN CN202121716160.8U patent/CN215646612U/en active Active
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