CN214480286U - PCB plane high-frequency transformer power supply - Google Patents
PCB plane high-frequency transformer power supply Download PDFInfo
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- CN214480286U CN214480286U CN202022390080.XU CN202022390080U CN214480286U CN 214480286 U CN214480286 U CN 214480286U CN 202022390080 U CN202022390080 U CN 202022390080U CN 214480286 U CN214480286 U CN 214480286U
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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
Abstract
The utility model discloses a PCB plane high-frequency transformer power supply, which comprises a mains supply input circuit, an EMI rectification filter circuit, a power conversion circuit, a synchronous rectification filter circuit, a low stepping voltage control circuit and a PD output circuit; the power conversion circuit comprises a planar transformer and a chip U1, wherein a built-in GaN Mos/PWM driving circuit, a built-in synchronous driving circuit and an internal synchronous driving circuit are integrated in the chip U1Put I2C/voltage, current feedback circuit; the planar transformer is characterized in that a secondary PCB is divided into an upper part and a lower part, a primary PCB is clamped in the middle of the secondary PCB, and the secondary PCB is paved with a copper structure in a large area. The utility model discloses have small, efficient, bring better heat dissipation and more reliable electric property for the product, the coupling is also better, reduces and leaks the sense, also can improve production efficiency and direct rate simultaneously.
Description
Technical Field
The utility model belongs to the technical field of power adapter, specifically relate to a PCB plane high frequency transformer power.
Background
In addition, the high-frequency transformer in the mode has larger leakage inductance, so the loss is more outstanding, the heat dissipation problem is also a big problem of the traditional high-frequency transformer, the volume of the power supply is generally larger, and the voltage output control accuracy is also poorer.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned problem, provide a PCB plane high frequency transformer power, can make transformer power volume littleer, heat dispersion good, efficient, voltage output control accuracy is high moreover.
The utility model discloses a realize through following technical scheme:
a PCB plane high-frequency transformer power supply comprises a mains supply input circuit, an EMI (electro-magnetic interference) rectification filter circuit, a power conversion circuit, a synchronous rectification filter circuit, a low stepping voltage control circuit and a PD (potential difference) output circuit; the power conversion circuit comprises a planar transformer and a chip U1, wherein a built-in GaN Mos/PWM driving circuit, a built-in synchronous driving circuit and a built-in I are integrated in the chip U12C/voltage, current feedback circuit; the commercial power input circuit is connected with the input end of the EMI rectifying and filtering circuit, the positive electrode of the output end of the EMI rectifying and filtering circuit is connected with the input end of the primary side of the planar transformer, and the output end of the primary side of the planar transformer is connected with the built-in GaN Mos/PWM driving circuit integrated in the chip U1; two ends of the secondary side of the planar transformer are connected with the input end of the synchronous rectification filter circuit; the drive control circuit of the synchronous rectification filter circuit is connected with a built-in synchronous drive circuit of the chip U1; the output end of the synchronous rectification filter circuit is connected with the PD output circuit; the output control circuit of the PD output circuit is connected with a chip U2 of the low stepping voltage control circuit; the chip U2 of the low step voltage control circuit is connected with the built-in I of the chip U12C/voltage and current feedback circuit connection.
Further, in the above PCB planar high frequency transformer power supply, the planar transformer is a planar transformer in which the secondary PCB is divided into an upper part and a lower part, the primary PCB is clamped between the two parts, and the secondary PCB is laid with a large area of copper.
Further, in the PCB planar high-frequency transformer power supply, the model of the chip U1 is INN337 xC.
Further, in the above PCB planar high frequency transformer power supply, the chip U2 is a programmable switching power supply of model VP 302.
The utility model has the advantages that: the utility model adopts the secondary clamp primary, the secondary uses the plane transformer of the large-area copper-laying structure, has small volume and high efficiency, brings better heat dissipation and more reliable electrical performance to the product, has better coupling, reduces the leakage inductance, and can improve the production efficiency and the straight-through rate; the whole circuit structure can be lighter and simpler; the low stepping voltage control circuit is matched with the VP302 programmable switching power supply through being connected with the I2C circuit, and in addition, the voltage and current are fed back to the VFB and the IFB, so that the function of stepping at a voltage of 20mV can be realized by accurately controlling the output voltage.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
In the figure, 10, EMI rectifying filter circuit, 20, power conversion circuit, 21, planar transformer, 22, built-in GaN Mos/PWM drive circuit, 23, built-in synchronous drive circuit, 24, built-in I2C/voltage and current feedback circuits, 30 synchronous rectification filter circuits, 40 low stepping voltage control circuits, 50 PD output circuits.
Detailed Description
The invention will be further described with reference to the following specific examples and the accompanying drawings.
As shown in fig. 1-2, a PCB planar high frequency transformer power supply includes a mains input circuit, an EMI rectifying and filtering circuit 10, a power conversion circuit 20, a synchronous rectifying and filtering circuit 30, a low step voltage control circuit 40, and a PD output circuit 50. The power conversion circuit 20 includes a planar transformer 21 and a chip U1. The model of the chip U1 is INN337xC, and a built-in GaN Mos/PWM driving circuit 22, a built-in synchronous driving circuit 23 and a built-in I are integrated in the chip U12C/voltage, current feedback circuit 24.
The planar transformer 21 is a planar transformer in which a secondary PCB is divided into an upper part and a lower part, a primary PCB is clamped between the two parts, and a copper structure is laid on the secondary PCB in a large area. The coupling is also better when the heat dissipation is better, reduces the leakage inductance, promotes efficiency.
The mains supply input circuit is connected with the input end of the EMI rectifying and filtering circuit 10; the positive pole of the output end of the EMI rectifying and filtering circuit 10 is connected with the input end of the primary side of the planar transformer 21, and the negative pole of the output end is grounded; the output end of the primary side of the planar transformer 21 is connected with the drain electrode of a GaN Mos tube arranged in a chip U1, the grid electrode of the GaN Mos tube is connected with the PWM drive arranged in a chip U1, and the source electrode of the GaN Mos tube is grounded; two ends of the secondary side of the planar transformer 21 are connected with the input end of the synchronous rectification filter circuit 30; the drive control circuit of the synchronous rectification filter circuit 30 is connected with the built-in synchronous drive circuit 23 of the chip U1; the output end of the synchronous rectification filter circuit 30 is connected with a PD output circuit 50(TYPE C); the output control circuit of the PD output circuit 50 is connected to the chip U2 of the low step voltage control circuit 40; the chip U2 of the low step voltage control circuit 40 is connected with the built-in I of the chip U12C/voltage, current feedback circuit 24 is connected.
And a fuse F1 is connected in series on the live wire of the commercial power input circuit.
The synchronous rectification filter circuit 30 comprises a field effect transistor Q1, a capacitor C17 and a capacitor C18, wherein two ends of the capacitor C17 and the capacitor C18 are connected in parallel, one end of each end is connected with the anode of the secondary side of the planar transformer 21, the other end of each end is connected with the cathode of the secondary side of the planar transformer 21 through a field effect transistor Q1, and the grid of the field effect transistor Q1 is connected to a pin 9 of the built-in synchronous driving circuit 23 of the chip U1.
The positive electrode of the output end of the synchronous rectification filter circuit 30 after being filtered by the capacitor is connected to the positive electrode end of the power supply of the PD output circuit 50(TYPE C) through a field effect tube Q2, and the grid electrode of the field effect tube Q2 is connected to a pin 8 of a chip U1. The negative electrode of the output end of the synchronous rectification filter circuit 30 after being filtered by the capacitor is connected to the GND end of the PD output circuit 50(TYPE C) through a resistor R18.
The chip U2 is a programmable switching power supply of model VP 302. Pins 1, 2 and 3 of the chip U2 are respectively connected with pins 7, 5 and 6 of a chip U1; pins 5, 6, 7 and 8 of the chip U2 are respectively connected with ports D-, D +, CC2 and CC1 of the TYPE C interface.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art should be equivalent replacement modes without departing from the spirit and principles of the present invention.
Claims (4)
1. The utility model provides a PCB plane high frequency transformer power which characterized in that: the power supply comprises a mains supply input circuit, an EMI (electro-magnetic interference) rectification filter circuit, a power conversion circuit, a synchronous rectification filter circuit, a low stepping voltage control circuit and a PD (potential difference) output circuit; the power conversion circuit comprises a planar transformer and a chip U1, wherein a built-in GaN Mos/PWM driving circuit, a built-in synchronous driving circuit and a built-in I are integrated in the chip U12C/voltage, current feedback circuit; the commercial power input circuit is connected with the input end of the EMI rectifying and filtering circuit, the positive electrode of the output end of the EMI rectifying and filtering circuit is connected with the input end of the primary side of the planar transformer, and the output end of the primary side of the planar transformer is connected with the built-in GaN Mos/PWM driving circuit integrated in the chip U1; two ends of the secondary side of the planar transformer are connected with the input end of the synchronous rectification filter circuit; the drive control circuit of the synchronous rectification filter circuit is connected with a built-in synchronous drive circuit of the chip U1; the output end of the synchronous rectification filter circuit is connected with the PD output circuit; the output control circuit of the PD output circuit is connected with a chip U2 of the low stepping voltage control circuit; the chip U2 of the low step voltage control circuit is connected with the built-in I of the chip U12C/voltage and current feedback circuit connection.
2. The PCB planar high frequency transformer power supply of claim 1, wherein: the planar transformer is characterized in that a secondary PCB is divided into an upper part and a lower part, a primary PCB is clamped in the middle of the secondary PCB, and the secondary PCB is paved with a copper structure in a large area.
3. The PCB planar high frequency transformer power supply of claim 1, wherein: the model of the chip U1 is INN337 xC.
4. The PCB planar high frequency transformer power supply of claim 1, wherein: the chip U2 is a programmable switching power supply of model VP 302.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390080.XU CN214480286U (en) | 2020-10-25 | 2020-10-25 | PCB plane high-frequency transformer power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390080.XU CN214480286U (en) | 2020-10-25 | 2020-10-25 | PCB plane high-frequency transformer power supply |
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| Publication Number | Publication Date |
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| CN214480286U true CN214480286U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022390080.XU Active CN214480286U (en) | 2020-10-25 | 2020-10-25 | PCB plane high-frequency transformer power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114501903A (en) * | 2022-01-26 | 2022-05-13 | 湖南炬神电子有限公司 | Subminiature double-port output GaN quick charging device |
-
2020
- 2020-10-25 CN CN202022390080.XU patent/CN214480286U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114501903A (en) * | 2022-01-26 | 2022-05-13 | 湖南炬神电子有限公司 | Subminiature double-port output GaN quick charging device |
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