CN218183252U - Transformer flyback switching power supply circuit - Google Patents
Transformer flyback switching power supply circuit Download PDFInfo
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- CN218183252U CN218183252U CN202222649243.0U CN202222649243U CN218183252U CN 218183252 U CN218183252 U CN 218183252U CN 202222649243 U CN202222649243 U CN 202222649243U CN 218183252 U CN218183252 U CN 218183252U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a switching power supply technical field specifically discloses a transformer flyback switching power supply circuit, including power input circuit, voltage stabilizing circuit, power control circuit, photoelectric coupling circuit and power output circuit, voltage stabilizing circuit respectively with power input circuit, power control circuit and power output circuit electric connection, photoelectric coupling circuit respectively with power control circuit and power output circuit electric connection. The utility model, through adding the power control circuit and the photoelectric coupling circuit to cooperate and inhibit interference, ensures that the secondary side does not cause circuit damage due to overcurrent; the stability of the whole circuit is further improved by arranging the voltage stabilizing circuit to prevent instant impact.
Description
Technical Field
The utility model relates to a switching power supply technical field, in particular to transformer flyback switching power supply circuit.
Background
A switching power supply is an indispensable part of electronic equipment. With the development of power electronic technology, switching power supplies have been developed to have higher frequencies, higher power densities, and higher reliability. The flyback circuit is widely applied because the flyback circuit can realize multi-path isolated output by simply adding a secondary winding. However, in practical application, the interference generated by the flyback circuit when the MOSFET-D terminal of the transistor works is the largest, and there are technical difficulties of insufficient anti-interference capability and poor circuit stability.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a transformer flyback switching power supply circuit, which can prevent the circuit from being damaged due to overcurrent by increasing and setting a power control circuit to cooperate with a photoelectric coupling circuit to inhibit interference; the stability of the whole circuit is further improved by arranging the voltage stabilizing circuit to prevent instant impact.
In order to solve the technical problem, the technical scheme of the utility model is that:
a transformer flyback switching power supply circuit comprises a power supply input circuit, a voltage stabilizing circuit, a power supply control circuit, a photoelectric coupling circuit and a power supply output circuit, wherein the voltage stabilizing circuit is electrically connected with the power supply input circuit, the power supply control circuit and the power supply output circuit respectively, and the photoelectric coupling circuit is electrically connected with the power supply control circuit and the power supply output circuit respectively.
Preferably, the power input circuit includes a fuse F1, an inductor L1, a resistor R4, a resistor R5, a resistor R7, a resistor R9, a resistor R10, a capacitor C4, a capacitor C10, a capacitor C11, and an inductor L2, where the fuse F1, the resistor R4, the capacitor C4, and the capacitor C11 are all connected to the inductor L1, the resistor R4 is connected to the resistor R7, and the resistor R7, the resistor R9, the capacitor C10, the resistor R5, the inductor L1, and the resistor R10 are all connected to the inductor L2.
Preferably, the voltage stabilizing circuit comprises a rectifier bridge D1, a resistor R2, a resistor R6, a resistor R8, a resistor R13, a transformer T1, a capacitor C3, a capacitor C5 and a diode D4, the inductor L2, the capacitor C1, the capacitor C3, the capacitor C5, the resistor R1, the resistor R2 and the transformer T1 are all connected with the rectifier bridge D1, the resistor R1 is connected with the resistor R8, the capacitor C1 and the resistor R2 are all connected with the diode D4, and the diode D4 and the resistor R13 are all connected with the transformer T1.
Preferably, the power control circuit includes a power management chip IC1, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a transistor Q1, a transistor Q2, a transistor Q3, a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C13, a capacitor C15, a capacitor C18, a capacitor C19, a capacitor C20, and a capacitor C21, the resistor R15 is connected to the transformer T1, the diode D5 is connected to the resistor R15, the resistor R14, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R22, the resistor R23, the resistor R24, the resistor R25, the transistor Q2, the transistor Q3, the diode D5, the diode D6, the diode D7, the diode D8, the capacitor C13, the capacitor C15, the capacitor C18, the capacitor C19, the capacitor C20, the capacitor C21, and the power management chip, and the resistor R13 and the diode R13.
Preferably, the photoelectric coupling circuit comprises a photoelectric coupler U1, a capacitor C14, a capacitor C16, a resistor R21, a resistor R26, a resistor R27 and a voltage regulator tube U2, the photoelectric coupler U1 is respectively connected with the power management chip IC1, the capacitor C14, the capacitor C16 and the voltage regulator tube U2, the resistor R21 is connected with the capacitor C16, and the capacitor C14, the resistor R21, the resistor R26 and the resistor R27 are all connected with the voltage regulator tube U2.
Preferably, the power output circuit includes a resistor R3, a diode D2, a diode D3, a resistor R11, a resistor R12, a capacitor C2, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, an inductor L3, and an inductor L4, the resistor R3, the diode D2, the diode D3, the capacitor C8, the capacitor C9, and the inductor L4 are all connected to the transformer T1, the resistor R13 is connected to the photocoupler U1, the capacitor C2 is connected to the resistor R3, the capacitor C2, the diode D2, and the diode D3 are all connected to the inductor L3, the resistor R12, the capacitor C8, the capacitor C9, the inductor L3, the resistor R11, the capacitor C6, and the capacitor C7 are all connected to the inductor L4, and the resistor R11 is connected to the regulator tube U2.
Adopt above-mentioned technical scheme, the utility model provides a pair of transformer flyback switching power supply circuit has following beneficial effect: the voltage stabilizing circuit in the transformer flyback switch power supply circuit is respectively and electrically connected with the power supply input circuit, the power supply control circuit and the power supply output circuit, the photoelectric coupling circuit is respectively and electrically connected with the power supply control circuit and the power supply output circuit, interference is inhibited by additionally arranging the power supply control circuit and the photoelectric coupling circuit in a matching way, the secondary side is prevented from being damaged due to overcurrent, and the anti-interference capability is strong; the voltage stabilizing circuit is arranged to output stable voltage so as to prevent instant impact of voltage and further improve the stability of the whole circuit.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The following description will further explain embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
As shown in fig. 1, the utility model discloses an in the circuit schematic diagram, this transformer flyback switching power supply circuit includes power input circuit, voltage stabilizing circuit, power control circuit, optoelectronic coupling circuit and power output circuit, this voltage stabilizing circuit respectively with this power input circuit, power control circuit and power output circuit electric connection, this optoelectronic coupling circuit respectively with this power control circuit and power output circuit electric connection. It can be understood that the transformer flyback switching power supply circuit adopts an EC-2828 transformer full-voltage input and has an output power of 60W.
Specifically, the power input circuit includes a fuse F1, an inductor L1, a resistor R4, a resistor R5, a resistor R7, a resistor R9, a resistor R10, a capacitor C4, a capacitor C10, a capacitor C11, and an inductor L2, where the fuse F1, the resistor R4, the capacitor C4, and the capacitor C11 are all connected to the inductor L1, the resistor R4 is connected to the resistor R7, and the resistor R7, the resistor R9, the capacitor C10, the resistor R5, the inductor L1, and the resistor R10 are all connected to the inductor L2; the voltage stabilizing circuit comprises a rectifier bridge D1, a resistor R2, a resistor R6, a resistor R8, a resistor R13, a transformer T1, a capacitor C3, a capacitor C5 and a diode D4, wherein the inductor L2, the capacitor C1, the capacitor C3, the capacitor C5, the resistor R1, the resistor R2 and the transformer T1 are all connected with the rectifier bridge D1, the resistor R1 is connected with the resistor R8, the capacitor C1 and the resistor R2 are all connected with a diode D4, and the diode D4 and the resistor R13 are all connected with the transformer T1; the power control circuit comprises a power management chip IC1, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a transistor Q1, a triode Q2, a triode Q3, a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C13, a capacitor C15, a capacitor C18, a capacitor C19, a capacitor C20 and a capacitor C21, wherein the resistor R15 is connected with the transformer T1, the diode D5 is connected with the resistor R15, the resistor R14, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R22, the resistor R23, the resistor R24, the resistor R25, the triode Q2, the triode Q3, the diode D5, the diode D6, the diode D7, the diode D8, the capacitor C13, the capacitor C15, the capacitor C18, the capacitor C19, the capacitor C20 and the capacitor C21 are connected with the power management chip IC1 and the resistor R13, and the resistor R23 respectively; the photoelectric coupling circuit comprises a photoelectric coupler U1, a capacitor C14, a capacitor C16, a resistor R21, a resistor R26, a resistor R27 and a voltage regulator tube U2, wherein the photoelectric coupler U1 is respectively connected with the power management chip IC1, the capacitor C14, the capacitor C16 and the voltage regulator tube U2, the resistor R21 is connected with the capacitor C16, and the capacitor C14, the resistor R21, the resistor R26 and the resistor R27 are all connected with the voltage regulator tube U2; the power output circuit comprises a resistor R3, a diode D2, a diode D3, a resistor R11, a resistor R12, a capacitor C2, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, an inductor L3 and an inductor L4, wherein the resistor R3, the diode D2, the diode D3, the capacitor C8, the capacitor C9 and the inductor L4 are all connected with the transformer T1, the resistor R13 is connected with the photoelectric coupler U1, the capacitor C2 is connected with the resistor R3, the capacitor C2, the diode D2 and the diode D3 are all connected with the inductor L3, the resistor R12, the capacitor C8, the capacitor C9, the inductor L3, the resistor R11, the capacitor C6 and the capacitor C7 are all connected with the inductor L4, and the resistor R11 is connected with the voltage stabilizing tube U2. It can be understood that, the above only lists the main components and their connection relationships in the circuit, and the other components and their specific connection relationships are shown in fig. 1, which is not repeated herein; the power management chip IC1 may be a TL3843B chip or the like.
It can be understood that fuse F1 inserts the live wire terminal, and resistance R9 inserts the zero line terminal, before the circuit does not start, because the charging of high-voltage end starting resistor, can fill the voltage that IC (power management chip IC 1) started with the voltage on the electric capacity on the VCC, once the circuit has the problem can not start up, VCC because the default value of winding voltage is on the low side, the circuit also can not start, generally shows for the hiccup state, guarantees that transformer T1 secondary side does not cause the circuit to damage because of overflowing.
It can be understood that the utility model has the advantages of reasonable design, unique structure, and the coupling effect is relatively speaking the best. The short-circuit test is also carried out on the output short circuit of the secondary, because the coupling effect is good, VCC can be quickly reduced after short-term rush when the secondary short circuit is carried out, and the circuit is best protected when the VCC is reduced to the turn-off voltage of the IC, so that the voltage can be prevented from instantaneous impact. Note that this voltage needs to be more than 1V above the saturation turn-on of the MOSFET (i.e., transistor Q1) to avoid underdriving.
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 described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. A transformer flyback switching power supply circuit is characterized in that: the power supply control circuit comprises a power supply input circuit, a voltage stabilizing circuit, a power supply control circuit, a photoelectric coupling circuit and a power supply output circuit, wherein the voltage stabilizing circuit is respectively electrically connected with the power supply input circuit, the power supply control circuit and the power supply output circuit, and the photoelectric coupling circuit is respectively electrically connected with the power supply control circuit and the power supply output circuit.
2. The transformer flyback switching power supply circuit of claim 1, wherein: the power input circuit comprises a fuse F1, an inductor L1, a resistor R4, a resistor R5, a resistor R7, a resistor R9, a resistor R10, a capacitor C4, a capacitor C10, a capacitor C11 and an inductor L2, wherein the fuse F1, the resistor R4, the capacitor C4 and the capacitor C11 are all connected with the inductor L1, the resistor R4 is connected with the resistor R7, and the resistor R7, the resistor R9, the capacitor C10, the resistor R5, the inductor L1 and the resistor R10 are all connected with the inductor L2.
3. The transformer flyback switching power supply circuit of claim 2, wherein: the voltage stabilizing circuit comprises a rectifier bridge D1, a resistor R2, a resistor R6, a resistor R8, a resistor R13, a transformer T1, a capacitor C3, a capacitor C5 and a diode D4, wherein the inductor L2, the capacitor C1, the capacitor C3, the capacitor C5, the resistor R1, the resistor R2 and the transformer T1 are all connected with the rectifier bridge D1, the resistor R1 is connected with the resistor R8, the capacitor C1 and the resistor R2 are all connected with the diode D4, and the diode D4 and the resistor R13 are all connected with the transformer T1.
4. The transformer flyback switching power supply circuit of claim 3, wherein: the power control circuit comprises a power management chip IC1, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a transistor Q1, a triode Q2, a triode Q3, a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C13, a capacitor C15, a capacitor C18, a capacitor C19, a capacitor C20 and a capacitor C21, wherein the resistor R15 is connected with the transformer T1, the diode D5 is connected with the resistor R15, the resistor R14, the resistor R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20, the resistor R22, the resistor R23, the resistor R24, the resistor R25, the triode Q2, the triode Q3, the diode D5, the diode D6, the diode D7, the diode D8, the capacitor C13, the capacitor C15, the capacitor C18, the capacitor C19, the capacitor C20 and the capacitor C21 which are respectively connected with the power management chip IC1 and the resistor R23 and the diode D8.
5. The transformer flyback switching power supply circuit of claim 4, wherein: the photoelectric coupling circuit comprises a photoelectric coupler U1, a capacitor C14, a capacitor C16, a resistor R21, a resistor R26, a resistor R27 and a voltage regulator tube U2, wherein the photoelectric coupler U1 is respectively connected with the power management chip IC1, the capacitor C14, the capacitor C16 and the voltage regulator tube U2, the resistor R21 is connected with the capacitor C16, and the capacitor C14, the resistor R21, the resistor R26 and the resistor R27 are all connected with the voltage regulator tube U2.
6. The transformer flyback switching power supply circuit of claim 5, wherein: the power output circuit comprises a resistor R3, a diode D2, a diode D3, a resistor R11, a resistor R12, a capacitor C2, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, an inductor L3 and an inductor L4, wherein the resistor R3, the diode D2, the diode D3, the capacitor C8, the capacitor C9 and the inductor L4 are all connected with the transformer T1, the resistor R13 is connected with the photoelectric coupler U1, the capacitor C2 is connected with the resistor R3, the capacitor C2, the diode D2 and the diode D3 are all connected with the inductor L3, the resistor R12, the capacitor C8, the capacitor C9, the inductor L3, the resistor R11, the capacitor C6 and the capacitor C7 are all connected with the inductor L4, and the resistor R11 is connected with the voltage stabilizing tube U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222649243.0U CN218183252U (en) | 2022-10-08 | 2022-10-08 | Transformer flyback switching power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222649243.0U CN218183252U (en) | 2022-10-08 | 2022-10-08 | Transformer flyback switching power supply circuit |
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| Publication Number | Publication Date |
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| CN218183252U true CN218183252U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222649243.0U Active CN218183252U (en) | 2022-10-08 | 2022-10-08 | Transformer flyback switching power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117498704A (en) * | 2023-12-29 | 2024-02-02 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
-
2022
- 2022-10-08 CN CN202222649243.0U patent/CN218183252U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117498704A (en) * | 2023-12-29 | 2024-02-02 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
| CN117498704B (en) * | 2023-12-29 | 2024-03-29 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
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