CN211127165U - USB intelligent quick charging device - Google Patents
USB intelligent quick charging device Download PDFInfo
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- CN211127165U CN211127165U CN201921447576.7U CN201921447576U CN211127165U CN 211127165 U CN211127165 U CN 211127165U CN 201921447576 U CN201921447576 U CN 201921447576U CN 211127165 U CN211127165 U CN 211127165U
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Abstract
The utility model relates to a USB intelligent quick charging device, which comprises a shell, wherein a circuit assembly is arranged in the shell; the circuit assembly comprises a first PCBA board and a second PCBA board which are electrically connected through flying wires; a USB interface is arranged on the second PCBA board; the shell comprises a shell, a bottom shell and an insulating partition plate; the bottom shell is opposite to the insulating partition plate; the first PCBA plate is arranged between the bottom shell and the insulating partition plate; the insulating partition plate is positioned between the first PCBA board and the second PCBA board; one end of the shell is provided with a mounting port matched with the bottom shell, and the other end of the shell is provided with a plug port which corresponds to the USB interface on the second PCBA board and allows the USB interface to leak out; the lateral wall of the shell is provided with a clamping hole, the bottom shell and the insulating partition plate are respectively provided with a clamping hook which can be matched and connected with the clamping hole on the lateral wall of the shell, and the shell is fixedly connected with the bottom shell and the insulating partition plate through the matching of the clamping hole and the clamping hook. The utility model can reach 10W power under 174CC volume; and can realize the high insulation effect and good heat dissipation of EN62368-1 new standard under this volume.
Description
Technical Field
The utility model relates to a USB intelligence fills device soon.
Background
With the increasing and the successive generations of electronic devices, people have more and more charging demands for the electronic devices. Meanwhile, people expect that the charging efficiency of electronic equipment can be greatly improved along with high-rhythm life and work. Improving the charging efficiency of an electronic device can improve an improved charging head in addition to the electronic device itself.
However, since the internal space of the charging head is limited, it is difficult to achieve small volume and high power. For example, 10W power is difficult to achieve at 174CC volume. Meanwhile, under the power, it is difficult to realize EMC standard reaching and allowance by using elements with increased volume such as common mode inductance, Y capacitance and the like. At this volume and with the need to achieve high insulation for the new IEC-62368-1 standard (two Y capacitors are used according to the standard), the internal space becomes a direct contradiction (because of insufficient spacing).
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a USB intelligent quick charging device which can reach 10W power under the volume of 174 CC; and can meet the high insulation of EN62368-1 new standard under this volume, have good thermal diffusivity simultaneously.
Realize the utility model discloses the technical scheme of purpose is: the utility model is provided with a shell, and a circuit assembly is arranged in the shell; the circuit assembly comprises a first PCBA board and a second PCBA board which are electrically connected through flying wires; a USB interface is arranged on the second PCBA board; the shell comprises a shell, a bottom shell and an insulating partition plate; the bottom shell is opposite to the insulating partition plate; the first PCBA plate is arranged between the bottom shell and the insulating partition plate; the insulating partition plate is positioned between the first PCBA board and the second PCBA board; one end of the shell is provided with a mounting port matched with the bottom shell, and the other end of the shell is provided with a plug port which corresponds to the USB interface on the second PCBA board and allows the USB interface to leak out; the lateral wall of the shell is provided with a clamping hole, the bottom shell and the insulating partition plate are respectively provided with a clamping hook which can be matched and connected with the clamping hole on the lateral wall of the shell, and the shell is fixedly connected with the bottom shell and the insulating partition plate through the matching of the clamping hole and the clamping hook.
A positioning groove is formed in one side, located on the first PCBA, of the insulating partition plate; the first PCBA board fixing clip is arranged in the positioning groove.
A positioning pin is arranged on one side of the insulating partition plate, which is positioned on the second PCBA board; the second PCBA board is provided with jacks correspondingly matched with the positioning pins; the second PCBA board is connected with the insulating partition board through the matching of the positioning pins and the jacks.
A wiring groove is arranged on the insulating partition plate; flying wires electrically connecting the first PCBA board and the second PCBA board pass through the wiring groove.
The first PCBA board is externally wrapped with radiating fins, the radiating fins are positioned in the shell, the surfaces of the radiating fins are wavy, and the radiating fins are bent in L shapes.
The outer surface of the shell is provided with radiating fins.
The shell is provided with an elastic hook for being installed with the shell.
The first PCBA board is provided with a rectifying and filtering circuit, a starting circuit, an RCD absorption loop circuit, a transformer, a synchronous rectifying and filtering circuit, a PWM control loop circuit and an EMC filtering circuit;
the second PCBA board is provided with a charging protocol intelligent identification circuit and a USB interface;
the input end of the rectification filter circuit is connected with a power supply, and the output end of the rectification filter circuit is connected with the input end of the starting circuit and the input end of the RCD absorption loop circuit; the output end of the RCD absorption loop circuit is connected with the input end of the transformer; the output end of the transformer is connected with the input end of the synchronous rectification filter circuit, the output end of the synchronous rectification filter circuit is connected with the input end of the charging protocol intelligent identification circuit, and the output end of the charging protocol intelligent identification circuit is connected with the USB; the EMC filter circuit is respectively connected with the PWM control loop circuit and the RCD absorption loop circuit; the output end of the starting circuit is connected with the input end of the PWM control loop circuit.
The rectifying and filtering circuit comprises an FR resistance fuse, a sorting bridge stack, a first filtering capacitor, a second winding patch inductor and a third winding patch inductor, wherein a L wire is connected with one end of the FR resistance fuse, the other end of the FR resistance fuse is connected with the sorting bridge stack, an N wire is connected with the sorting bridge stack, the negative electrode of the sorting bridge stack is connected with one end of the third winding patch inductor and the positive electrode of the first filtering capacitor, the other end of the third winding patch inductor is connected with the input end of a starting circuit and the positive electrode of the second filtering capacitor, the negative electrode of the second filtering capacitor is connected with one end of the second winding patch inductor and grounded, the other end of the second winding patch inductor is connected with the positive electrode of the sorting bridge stack and the negative electrode of the first filtering capacitor, the FR resistance fuse is an anti-surge 2KV resistance fuse, and the sorting bridge stack is a patch-type sorting bridge stack.
The model of the second wire wound patch inductor and the model of the third wire wound patch inductor are both CMI322513X100KB-1210-10 uH.
The PWM control loop circuit comprises a PWM control chip and a line loss compensation circuit; a VDD interface of the PWM control chip is connected with the output end of the starting circuit, and a FB interface of the PWM control chip is connected with the line loss compensation circuit; the line loss compensation circuit comprises a sixth resistor and an eighth resistor which are connected in parallel.
The EMC filter circuit comprises an iron core inductance coil, a third capacitor and a fourth capacitor; one end of the iron core inductance coil is respectively connected with one end of the third capacitor and one end of the fourth capacitor and grounded, and the other end of the iron core inductance coil is connected with the other end of the third capacitor; the FB interface of the PWM control chip is connected with the other end of the iron core inductance coil, the drain electrode of the PWM control chip is connected with the other end of the fourth capacitor, the other end of the fourth capacitor is connected with the output end of the RCD absorption loop circuit, and the other end of the iron core inductance coil is connected with the VDD interface of the PWM control chip.
The third capacitor and the fourth capacitor are low-capacity capacitors.
The model of the PWM control chip is OB 2502.
The utility model discloses has positive effect: (1) the utility model can effectively solve the problem of insufficient insulation caused by insufficient distance in small volume by using the insulating partition plate, and the product can meet the high insulation requirement of EN62368-1 new standard through the insulating partition plate;
(2) the utility model realizes reasonable space layout through the insulating partition board;
(3) the utility model can realize the rapid installation of the shell and the circuit assembly through the clamping holes and the clamping hooks;
(4) the utility model can further improve the installation efficiency through the positioning groove and the positioning foot, and can ensure the stability of the circuit assembly in the shell;
(5) the utility model effectively plans the flying line through the wiring groove, and ensures that the layout of the internal space is more reasonable;
(6) the heat dissipation plate can effectively conduct the heat of the circuit assembly, and meanwhile, the surface area of the heat dissipation plate is increased and the heat conduction efficiency is improved through the wave-shaped design;
(7) the utility model can effectively increase the surface area of the shell through the radiating fins, and improve the radiating efficiency;
(8) the utility model can be assembled and connected with other equipment more conveniently and rapidly through the elastic hook;
(9) the utility model discloses can realize 5V 2A's power when than the little 13% space of apple charger 1A 5V. Meanwhile, the energy rate reaches 6, the average efficiency is more than 78.7 percent, and the no-load power consumption is less than 100 mW.
(10) The utility model saves the work die inductance through the second winding chip inductance and the third winding chip inductance, and greatly reduces the circuit design space area; simultaneously can effectively solve the outward conduction and the radiation of CM, DM conduction radiation wave through second wire winding paster inductance and third wire winding paster inductance.
(11) The utility model discloses utilize SMD arrangement bridge rectifier also can reduce circuit space volume to a certain extent, provide technical support for the miniaturization.
(12) The utility model discloses a sixth resistance and eighth resistance among the line loss complementary circuit can be so that output load when the electric current increases, and voltage improves to effectively avoided the charging power that the on-line loss brought to descend, improved the charging speed.
(13) The design of the EMC filter circuit effectively improves the EMC result by bypassing the high-frequency harmonic to the ground through the third capacitor and the fourth capacitor; meanwhile, a Y capacitor is omitted, and technical support is provided for the reduction of the volume of the quick charging head.
(14) The utility model discloses do not have Y electric capacity in primary side and secondary side, insulation resistance is higher, and leakage current is littleer, says safelyr to the human body.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an exploded schematic view of the present invention;
FIG. 3 is a schematic structural view of the insulating spacer of the present invention;
FIG. 4 is a schematic structural view of a heat sink in the present invention;
FIG. 5 is a schematic diagram of a circuit module connection of the circuit assembly of the present invention;
fig. 6 is a circuit diagram of the circuit assembly of the present invention;
fig. 7 is a rectifying and filtering circuit according to the present invention;
fig. 8 is a starting circuit of the present invention;
fig. 9 is an RCD absorption circuit of the present invention;
fig. 10 is a circuit of the PWM control loop of the present invention;
fig. 11 is a middle synchronous rectification filter circuit of the present invention;
fig. 12 is an EMC filter circuit according to the present invention;
fig. 13 is a circuit for intelligently identifying a charging protocol in the present invention;
fig. 14 is a voltage drop compensation test chart according to the present invention.
Detailed Description
Referring to fig. 1 to 4, the present invention has a housing 1, and a circuit assembly is disposed in the housing 1; the circuit assembly comprises a first PCBA board 2 and a second PCBA board 3 which are electrically connected through flying wires; a USB interface 31 is arranged on the second PCBA board 3; the shell 1 comprises a shell 11, a bottom shell 12 and an insulating partition plate 13; the bottom shell 12 is arranged opposite to the insulating partition plate 13; the first PCBA board 2 is arranged between the bottom shell 12 and the insulating partition plate 13; the insulating partition plate 13 is positioned between the first PCBA board 2 and the second PCBA board 3; one end of the shell 11 is provided with a mounting port matched with the bottom shell 12, and the other end of the shell 11 is provided with a plug port corresponding to the USB interface 31 on the second PCBA board 3 and allowing the USB interface 31 to leak out; the side wall of the housing 11 is provided with a clamping hole 14, the bottom shell 12 and the insulating partition 13 are both provided with a clamping hook 15 which can be matched and connected with the clamping hole 14 on the side wall of the housing 11, and the housing 11 is fixedly connected with the bottom shell 12 and the insulating partition 13 through the matching of the clamping hole 14 and the clamping hook 15.
A positioning groove 131 is formed in one side, located on the first PCBA board 2, of the insulating partition plate 13; the first PCBA board 2 is fixedly clamped in the positioning groove 131.
A positioning pin 132 is arranged on one side of the insulating partition plate 13, which is positioned on the second PCBA board 3; the second PCBA board 3 is provided with jacks correspondingly matched with the positioning pins 132; the second PCBA board 3 is connected to the insulating spacer 13 by the engagement of the locating feet 132 with the receptacles.
A wiring groove 133 is arranged on the insulating partition plate 13; flying wires electrically connecting the first PCBA board 2 and the second PCBA board 3 pass through the cabling channel 133.
The first PCBA board 2 is externally wrapped with radiating fins 4, the radiating fins 4 are positioned in the shell 1, the surfaces of the radiating fins 4 are wavy, and the radiating fins 4 are L-shaped and bent.
The outer surface of the housing 11 is provided with heat radiating fins 111.
The shell 11 is provided with an elastic hook 112 for mounting, and the elastic hook 12 can be quickly mounted with other equipment such as a power board.
Referring to fig. 5 to 13, in the present invention, a first PCBA board 2 is provided with a rectifier filter circuit 21, a start circuit 22, an RCD absorption loop circuit 23, a transformer 24, a synchronous rectifier filter circuit 25, a PWM control loop circuit 26, and an EMC filter circuit 27;
the second PCBA board 3 is provided with a charging protocol intelligent identification circuit 32 and a USB interface 31; the input end of the rectifying and filtering circuit 21 is connected with a power supply, and the output end of the rectifying and filtering circuit 21 is connected with the input end of the starting circuit 22 and the input end of the RCD absorption loop circuit 23; the output end of the RCD absorption loop circuit 23 is connected with the input end of the transformer 24; the output end of the transformer 24 is connected with the input end of the synchronous rectification filter circuit 25, the output end of the synchronous rectification filter circuit 25 is connected with the input end of the charging protocol intelligent identification circuit 32, and the output end of the charging protocol intelligent identification circuit 32 is connected with the USB; the EMC filter circuit 27 is respectively connected with the PWM control circuit 26 and the RCD absorption circuit 23; an output of the start-up circuit 22 is connected to an input of a PWM control loop circuit 26.
The rectifying and filtering circuit 21 comprises an FR resistance fuse, a trimming bridge stack BD1, a first filtering capacitor CE1, a second filtering capacitor CE2, a second winding patch inductor 2 and a third winding patch inductor L, a L wire is connected with one end of the FR resistance fuse, the other end of the FR resistance fuse is connected with a trimming bridge stack BD1, an N wire is connected with a trimming bridge stack BD1, the negative electrode of the trimming bridge stack BD1 is connected with one end of the third winding patch inductor L and the positive electrode of the first filtering capacitor CE1, the other end of the third winding patch inductor L is connected with the input end of the starting circuit 22 and the positive electrode of the second filtering capacitor CE2, the negative electrode of the second filtering capacitor CE2 is connected with one end of the second winding patch inductor L and grounded, the other end of the second winding patch inductor L2 is connected with the positive electrode of the trimming bridge stack BD1 and the negative electrode of the first filtering capacitor CE1, the trimming bridge stack BD 2 trimming resistor BD 24 is an anti-surge inductor BD 24-L, a winding patch inductor CMH 1210-5910.
The PWM control loop circuit 26 includes a PWM control chip U1 and a line loss compensation circuit 261; the model of the PWM control chip U1 is OB 2502; the VDD interface of the PWM control chip U1 is connected to the output terminal of the start circuit 22, and the FB interface of the PWM control chip U1 is connected to the line loss compensation circuit 261; the line loss compensation circuit 261 comprises a sixth resistor R6 and an eighth resistor R8 which are connected in parallel; the sixth resistor R6 and the eighth resistor R8 which are connected in parallel are grounded; the CS interface of the PWM control chip U1 is connected to the two resistors R7 and R7A connected in parallel, and the two resistors R7 and R7A connected in parallel are grounded.
The EMC filter circuit 27 comprises a core inductance coil, a third capacitor C3 and a fourth capacitor C4; the third capacitor C3 and the fourth capacitor C4 are low-capacity capacitors; one end of the iron core inductance coil is respectively connected with one end of a third capacitor C3 and one end of a fourth capacitor C4 and is grounded, and the other end of the iron core inductance coil is connected with the other end of the third capacitor C3; the drain of the PWM control chip U1 is connected to the other end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected to the output end of the RCD absorption loop circuit 3, the sixth resistor R6 and the eighth resistor R8 are connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the other end of the iron core inductor; the other end of the iron core inductance coil is connected with the anode of a sixth diode D6, and the cathode of the sixth diode D6 is connected with the VDD interface of the PWM control chip U1.
The synchronous rectification filter circuit 25 comprises a control chip U2, and the model of the control chip U2 is DK45R 10.
The charging protocol intelligent identification circuit 32 comprises a control chip U3, and the model of the control chip U3 is SOT 23-6. Of course, the model of the control chip U3 can also be CW 3005.
Through the brand new design of the rectifier filter circuit 21 and the EMC filter circuit 27, common-mode inductance and Y capacitance are avoided. The volume reduction is really realized in space.
To the utility model discloses carried out functional test, can know through the test, the utility model discloses an electric energy conversion average efficiency is greater than 78.7%, generally can reach more than 79%. In addition the utility model discloses because EMC filter circuit 27's design to avoid Y electric capacity, consequently be less than 10mA for 4.8 mu A ~ 5 mu A far away through test leakage current.
To the utility model discloses a voltage drop compensation test sees figure 14, when charging current increases, can produce great voltage drop on the charging line. In order to improve the charging efficiency, the loss generated on the charging line can be compensated by increasing the output voltage.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A USB intelligent quick charging device is provided with a shell (1), wherein a circuit assembly is arranged in the shell (1); the method is characterized in that: the circuit assembly comprises a first PCBA board (2) and a second PCBA board (3) which are electrically connected through flying wires; a USB interface (31) is arranged on the second PCBA board (3); the shell (1) comprises a shell (11), a bottom shell (12) and an insulating partition plate (13); the bottom shell (12) is opposite to the insulating partition plate (13); the first PCBA board (2) is arranged between the bottom shell (12) and the insulating partition plate (13); the insulating partition plate (13) is positioned between the first PCBA board (2) and the second PCBA board (3); one end of the shell (11) is provided with a mounting port matched with the bottom shell (12), and the other end of the shell (11) is provided with a plug port which corresponds to the USB interface (31) on the second PCBA board (3) and allows the USB interface (31) to leak out; the side wall of the shell (11) is provided with a clamping hole (14), the bottom shell (12) and the insulating partition plate (13) are respectively provided with a clamping hook (15) which can be matched and connected with the clamping hole (14) on the side wall of the shell (11), and the shell (11) is fixedly connected with the bottom shell (12) and the insulating partition plate (13) through the matching of the clamping hole (14) and the clamping hook (15).
2. The intelligent USB quick charging device according to claim 1, characterized in that: a positioning groove (131) is formed in one side, located on the first PCBA board (2), of the insulating partition board (13); the first PCBA board (2) is fixedly clamped in the positioning groove (131).
3. The USB intelligent quick charging device according to claim 1 or 2, characterized in that: a positioning pin (132) is arranged on one side of the insulating partition plate (13) positioned on the second PCBA board (3); the second PCBA board (3) is provided with jacks correspondingly matched with the positioning pins (132); the second PCBA board (3) is connected with the insulating partition board (13) through the matching of the positioning pins (132) and the jacks.
4. The intelligent USB quick charging device according to claim 1, characterized in that: a wiring groove (133) is formed in the insulating partition plate (13); flying wires electrically connecting the first PCBA board (2) and the second PCBA board (3) pass through the wiring groove (133).
5. The USB intelligent quick charging device according to claim 1, wherein a radiating fin (4) is wrapped outside the first PCBA board (2), the radiating fin (4) is located inside the shell (1), the surface of the radiating fin (4) is wavy, and the radiating fin (4) is bent in an L shape.
6. The intelligent USB quick charging device according to claim 1, characterized in that: the outer surface of the shell (11) is provided with radiating fins (111).
7. The intelligent USB quick charging device according to claim 1, characterized in that: the shell (11) is provided with an elastic hook (112) for being installed with the shell.
8. The intelligent USB quick charging device according to claim 1, characterized in that: the first PCBA board (2) is provided with a rectifying and filtering circuit (21), a starting circuit (22), an RCD absorption loop circuit (23), a transformer (24), a synchronous rectifying and filtering circuit (25), a PWM control loop circuit (26) and an EMC filtering circuit (27);
a charging protocol intelligent identification circuit (32) and a USB interface (31) are arranged on the second PCBA board (3);
the input end of the rectification filter circuit (21) is connected with a power supply, and the output end of the rectification filter circuit (21) is connected with the input end of the starting circuit (22) and the input end of the RCD absorption loop circuit (23); the output end of the RCD absorption loop circuit (23) is connected with the input end of the transformer (24); the output end of the transformer (24) is connected with the input end of the synchronous rectification filter circuit (25), the output end of the synchronous rectification filter circuit (25) is connected with the input end of the charging protocol intelligent identification circuit (32), and the output end of the charging protocol intelligent identification circuit (32) is connected with the USB interface (31); the EMC filter circuit (27) is respectively connected with the PWM control circuit (26) and the RCD absorption circuit (23); the output end of the starting circuit (22) is connected with the input end of the PWM control loop circuit (26);
the rectifying and filtering circuit (21) comprises an FR resistance fuse, a trimming bridge stack (BD1), a first filtering capacitor (CE1), a second filtering capacitor (CE2), a second winding patch inductor (L) and a third winding patch inductor (L), wherein a L wire is connected with one end of the FR resistance fuse, the other end of the FR resistance fuse is connected with the trimming bridge stack (BD1), an N wire is connected with the trimming bridge stack (BD1), the negative electrode of the trimming bridge stack (BD1) is connected with one end of the third winding patch inductor (L) and the positive electrode of the first filtering capacitor (CE1), the other end of the third winding patch inductor (L) is connected with the input end of the starting circuit (22) and the positive electrode of the second filtering capacitor (CE2), the negative electrode of the second filtering capacitor (CE2) is connected with one end of the second winding patch inductor (BD L) and grounded, the other end of the second winding patch inductor (BD L) is connected with the positive electrode of the trimming bridge stack (CE) and the trimming bridge stack (BD1), and the negative electrode of the trimming bridge stack (BD 638) is connected with the first surge resistance fuse (BD 638).
9. The intelligent USB quick charging device according to claim 8, wherein: the EMC filter circuit (27) comprises a core inductor, a third capacitor (C3) and a fourth capacitor (C4); one end of the iron core inductance coil is respectively connected with one end of a third capacitor (C3) and one end of a fourth capacitor (C4) and is grounded, and the other end of the iron core inductance coil is connected with the other end of the third capacitor (C3); the FB interface of the PWM control chip (U1) is connected with the other end of the iron core inductance coil, the drain electrode of the PWM control chip (U1) is connected with the other end of the fourth capacitor (C4), the other end of the fourth capacitor (C4) is connected with the output end of the RCD absorption loop circuit (23), and the other end of the iron core inductance coil is connected with the VDD interface of the PWM control chip (U1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447576.7U CN211127165U (en) | 2019-09-02 | 2019-09-02 | USB intelligent quick charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447576.7U CN211127165U (en) | 2019-09-02 | 2019-09-02 | USB intelligent quick charging device |
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| Publication Number | Publication Date |
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| CN211127165U true CN211127165U (en) | 2020-07-28 |
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| CN201921447576.7U Active CN211127165U (en) | 2019-09-02 | 2019-09-02 | USB intelligent quick charging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912217A (en) * | 2019-09-02 | 2020-03-24 | 英特曼电工（常州）有限公司 | USB intelligent quick charging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912217A (en) * | 2019-09-02 | 2020-03-24 | 英特曼电工（常州）有限公司 | USB intelligent quick charging device |
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