CN211556952U

CN211556952U - Double-port USB charging socket

Info

Publication number: CN211556952U
Application number: CN202020241219.1U
Authority: CN
Inventors: 刘家成; 黄建辉
Original assignee: Guangdong Mole Technology Co ltd
Current assignee: Guangdong Mole Technology Co ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-09-22
Anticipated expiration: 2030-03-02

Abstract

The utility model provides a double port USB socket that charges, which comprises a socket body, be provided with two detachable USB sockets on the socket body, this internal USB charging circuit that is provided with of socket, USB charging circuit is connected with the USB socket, USB charging circuit includes rectifier circuit, filter circuit, electric energy conversion circuit, a control circuit, high-pressure absorption circuit, USB output circuit, first USB interface circuit and second USB interface circuit, a control circuit includes control chip U3, control chip U3 is LN1F15, USB output circuit is including defeated synchronous rectification chip U4, defeated synchronous rectification chip U4 is LN5S19A, integrated rectification MOS pipe. The utility model discloses a USB socket that charges all has very high conversion efficiency under different loads, can avoid voltage input to cross lowly simultaneously and can't charge, can effectively reduce the calorific capacity of power during operation in addition when promoting conversion efficiency, and is more safe and reliable, but fills chip U1 and U2 intelligent recognition battery charging outfit soon, realizes filling soon.

Description

Double-port USB charging socket

Technical Field

The utility model relates to a socket, in particular to two port USB socket that charges.

Background

Along with the popularization of mobile equipment, people are increasingly unable to leave mobile equipment such as mobile phones and tablet computers, but the power consumption of the equipment is larger, especially for the high-performance mobile equipment, the power consumption is quite large, and charging is needed at any time, so that a lot of people can carry a charging plug when going out, but the charging plug is not easy to carry and can be easily lost, a considerable part of sockets on the market at present are provided with USB charging sockets, the problem that a charger needs to be carried when going out is solved to a certain extent, but the charging socket has high power conversion efficiency, so that the charging time is longer, people can not take longer time near the socket, and the charging sockets have a problem, the socket has high heat productivity when charging, and safety accidents are easily caused.

Therefore, further improvements are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a two port USB socket that charges that electric energy conversion efficiency is high, calorific capacity is little, can reduce voltage loss, practicality are strong to overcome the weak point among the prior art.

According to a two port USB socket that charges of this purpose design, including socket ontology, the last two detachable USB sockets that are provided with of socket ontology, this internal USB charging circuit that is provided with of socket, USB charging circuit is connected its characterized in that with USB socket: the USB charging circuit comprises a rectifying circuit, a filter circuit, an electric energy conversion circuit, a control circuit, a high-voltage absorption circuit, a USB output circuit, a first USB interface circuit and a second USB interface circuit, wherein the input end of the filter circuit is connected with the output end of the rectifying circuit, the electric energy conversion circuit is connected with the filter circuit, the control circuit is connected with the electric energy conversion circuit, the high-voltage absorption circuit is arranged between the filter circuit and the electric energy conversion circuit, the electric energy conversion circuit is connected with the USB output circuit, and the USB output circuit is respectively connected with the first USB interface circuit and the second USB interface circuit; the control circuit comprises a control chip U3, the control chip U3 is LN1F15, a PWM/PFM/PBM control mode is adopted, the USB output circuit comprises an input synchronous rectification chip U4, the input synchronous rectification chip U4 is LN5S19A and an integrated rectification MOS tube, a VCC end of the input synchronous rectification chip U4 is connected with the electric energy conversion circuit through a diode D3 and a resistor R8 which are connected in series, an S end of the input synchronous rectification chip U4 is respectively connected with a pin 4 of a first USB and a pin 4 of a second USB, the first USB interface circuit comprises a quick-charging chip U1, the second USB interface circuit comprises a quick-charging chip U2, and the quick-charging chip U1 and the quick-charging chip U2 are both LN 4050.

The electric energy conversion circuit comprises a transformer T1, one output end of a transformer T1 is connected with a power supply 5V/2.4A, the other output end of a transformer T1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected with the anode of a diode D3.

The VDD end of the input synchronous rectification chip U4 is connected with a cathode of a diode D3 after being connected with capacitors C3 and C2 in series, the USB output circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a capacitor C8, a capacitor C9 and a resistor R9, and the capacitor C8, the capacitor C9 and the resistor R9 are arranged between one output end of the transformer T1 and the ground in parallel.

The VS end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R11, the VCC end of the control chip U1 is connected with the output end of the high-voltage absorption circuit, the OCC end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R14, and the CS end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R4 and a resistor R5 which are connected in parallel.

The output end of the quick charging chip U1 is respectively connected with pins 2 and 3 of a first USB, the input end of a first quick charging chip U1 is connected with a power supply 5V/2.4A, the output end of the quick charging chip U2 is respectively connected with pins 2 and 3 of a second USB, and the input end of a quick charging chip U2 is connected with the power supply 5V/2.4A; the USB socket is a CN socket.

Rectifier circuit includes live wire incoming end L, zero line incoming end N and rectifier bridge DB1, and live wire incoming end L and zero line incoming end N insert rectifier bridge DB 1's input is connected with thermistor RV between live wire incoming end L and the zero line incoming end N, thermistor RV and rectifier bridge DB 1's input parallel connection.

The filter circuit comprises an inductor L1 and a resistor R10 which are connected in parallel, one end of the inductor L1 is connected with the output end of the rectifier bridge DB1 through a capacitor C11, and the other end of the inductor L1 is connected to the input end of the transformer T1 and is grounded through a capacitor C10.

The control circuit further comprises a resistor R12 and a resistor R13 which are connected in parallel, a capacitor C6 and a capacitor C7 which are connected in parallel, and a diode D2 and a resistor R7 which are connected in series, wherein the VS end of the control chip U1 is grounded through the resistor R12 and the resistor R13, one end of the resistor R7 is connected with the resistor R11, the other end of the resistor R7 is connected with the anode of the diode D2, and the cathode of the diode D2 is connected with the capacitor C6.

The high-voltage absorption circuit comprises a diode D1 and a resistor R6 which are connected in series, a capacitor C1 and a resistor R1 which are connected in parallel, and a resistor R2 and a resistor R3 which are connected in series, wherein the anode of the diode D1 is connected with the input end of a transformer T1, the cathode of a diode D1 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with a capacitor C1 and a resistor R1 respectively, the capacitor C1 and a resistor R1 are connected in parallel and then connected to the input end of a transformer T1, the other end of an inductor L1 is connected to the VCC end of a control chip U1 through a resistor R2 and a resistor R3, and the resistor R3 is connected with a capacitor C7 and a capacitor.

The transformer T1 is a three-winding transformer, and a fuse F1 is connected in series between the input end of the rectifier bridge DB1 and the live wire access end L.

The utility model discloses a control chip U1 of USB charging socket has PWM/PFM/PBM mode, the conversion efficiency of system under different loads can further be optimized to multistage curve control's working method, the electric energy conversion efficiency of charging socket is greatly improved, and make standby power consumption can be as low as below 50mW, simultaneously can effectively avoid the noise that the human ear can hear to appear, defeated synchronous rectifier chip U4 integrated rectification MOS pipe, can effectively reduce the calorific capacity when supply socket works simultaneously in promoting efficiency, safer and more reliable, quick-charging chip U1 and quick-charging chip U2 can intelligent identification charging equipment, realize quick-charging, adapt to more equipment uses that need USB to charge, and CN1, two USB sockets of CN2 can carry out two equipment charges simultaneously, this USB charging socket still has output line loss automatic compensation function, can reduce the voltage loss of connecting device wire rod when heavy current charges, the situation that the voltage of the equipment port is too low to charge is avoided.

Drawings

Fig. 1 is a schematic circuit diagram of a USB charging socket according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1, the dual-port USB charging socket includes a socket body, two detachable USB sockets are arranged on the socket body, a USB charging circuit is arranged in the socket body, the USB charging circuit is connected with the USB sockets, the USB charging circuit includes a rectifying circuit, a filtering circuit, an electric energy conversion circuit, a control circuit, a high voltage absorption circuit, a USB output circuit, a first USB interface circuit and a second USB interface circuit, an input end of the filtering circuit is connected with an output end of the rectifying circuit, the electric energy conversion circuit is connected with the filtering circuit, the control circuit is connected with the electric energy conversion circuit, the high voltage absorption circuit is arranged between the filtering circuit and the electric energy conversion circuit, the electric energy conversion circuit is connected with the USB output circuit, and the USB output circuit is respectively connected with the first USB interface circuit and the second USB interface circuit; the control circuit comprises a control chip U3, the control chip U3 is LN1F15, a PWM/PFM/PBM control mode is adopted, the USB output circuit comprises an input synchronous rectification chip U4, the input synchronous rectification chip U4 is LN5S19A and an integrated rectification MOS tube, a VCC end (IC power supply end) of the input synchronous rectification chip U4 is connected with the electric energy conversion circuit through a diode D3 and a resistor R8 which are connected in series, an S end (output end) of the input synchronous rectification chip U4 is respectively connected with a pin 4 of a first USB and a pin 4 of a second USB, the first USB interface circuit comprises a fast-charging chip U1, the second USB interface circuit comprises a fast-charging chip U2, and the fast-charging chip U1 and the fast-charging chip U2 are both LN 4050. USB socket's that charges power control chip U3 has PWM/PFM/PBM mode, the operating means of multistage curve control can further optimize the conversion efficiency of system under different loads, improve socket's that charges electric energy conversion efficiency greatly, and make standby power consumption can be as low as below 50mW, can effectively avoid the noise that the human ear is audible to appear simultaneously, the integrated rectification MOS pipe of defeated synchronous rectifier chip U4, can effectively reduce the calorific capacity of power socket during operation simultaneously at the promotion efficiency, and is more safe and reliable.

The power conversion circuit comprises a transformer T1, wherein the transformer T1 is a three-winding transformer and comprises a primary side (namely the input end of a transformer T1), a secondary side (namely the output end of a transformer T1) and an auxiliary winding (namely the input end of a transformer T1); one end of a primary side main winding of the transformer T1 is connected with a direct-current voltage output end of the filter circuit, the other end of the primary side main winding of the transformer T1 is connected with the resistor R11, one end of a secondary side of the transformer T1 is connected with a power supply 5V/2.4A, the other end of the secondary side of the transformer T1 is connected with one end of the resistor R8, the other end of the resistor R8 is connected with an anode of the diode D3, and a cathode of the diode D3 is grounded through the capacitor C2 and the capacitor CY 1.

The VDD end of the input synchronous rectification chip U4 is connected with a capacitor C3 and a capacitor C2 in series and then is connected with the cathode of a diode D3, the other end of the secondary side of the input synchronous rectification chip U4 is connected with the D end (the input end of a transformer) of the input synchronous rectification chip U4, the USB output circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a capacitor C8, a capacitor C9 and a resistor R9, and the capacitor C8, the capacitor C9 and the resistor R9 are arranged between one output end of the transformer T1 and the ground in parallel.

The VS end (secondary output voltage control end) of the control chip U1 is connected with one end of the auxiliary winding through a resistor R11, the VCC end (IC power supply end) of the control chip U1 is connected with the output end of the high-voltage absorption circuit, the OCC end (secondary output line loss compensation adjusting end) of the control chip U1 is connected with the other end of the auxiliary winding through a resistor R14, and the CS end (primary current detection end) of the control chip U1 is connected with the other end of the auxiliary winding through a resistor R4 and a resistor R5 which are connected in parallel. Control chip U3 has the OCC end, and the OCC end is connected with electric energy conversion circuit for control chip U3 possesses output line loss automatic compensation function, and when heavy current charged, the OCC end carries out voltage compensation to equipment wire rod and equipment port through electric energy conversion circuit, and the voltage loss of connecting device wire rod when can reduce heavy current and charge avoids equipment port voltage to hang down and can't charge excessively.

The output end (M1 end and P1 end) of the quick charging chip U1 is respectively connected with the pin 2 and pin 3 of the first USB, the input end (V + end) of the quick charging chip U1 is connected with the power supply 5V/2.4A, the power supply 5V/2.4A is grounded through the capacitor C5 and the capacitor CY1, the V-end of the quick charging chip U1 is connected with the pin 4 of the first USB, the output end (M1 end and P1 end) of the quick charging chip U2 is respectively connected with the pin 2 and pin 3 of the second USB, the input end (V + end) of the quick charging chip U2 is connected with the power supply 5V/2.4A, the power supply 5V/2.4A is grounded through the capacitor C4 and the capacitor CY1, and the V-end of the quick charging chip U2 is connected with the pin 4 of the second USB; the USB socket is a CN socket.

Rectifier circuit includes live wire incoming end L, zero line incoming end N and rectifier bridge DB1, and live wire incoming end L and zero line incoming end N insert rectifier bridge DB 1's input, are connected with thermistor RV between live wire incoming end L and the zero line incoming end N, thermistor RV and rectifier bridge DB 1's input parallel connection, and rectifier bridge DB 1's output is connected with filter circuit's input.

The filter circuit comprises an inductor L1 and a resistor R10 which are connected in parallel, an electrolytic capacitor C11 and an electrolytic capacitor C10 which are connected in parallel between two output ends of a rectifier bridge DB1, the inductor L1 is connected in series between anodes of the two electrolytic capacitors, one end of an inductor L1 is connected with the output end of the rectifier bridge DB1 through a capacitor C11, and the other end of an inductor L1 is connected to the primary side of a transformer T1 and is grounded through a capacitor C10.

The control circuit further comprises a resistor R12 and a resistor R13 which are connected in parallel, a capacitor C6 and a capacitor C7 which are connected in parallel, and a diode D2 and a resistor R7 which are connected in series, wherein the VS end of the control chip U1 is grounded through the resistor R12 and the resistor R13, one end of the resistor R7 is connected with the resistor R11, the other end of the resistor R7 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the capacitor C6, two D ends (transformer input ends) of the control chip U3 are connected with one end of an auxiliary winding, the GND end of the control chip U3 is grounded, and the other end of the auxiliary winding is grounded; the control chip U3 is powered by the auxiliary winding and senses the feedback voltage through the auxiliary winding.

The high-voltage absorption circuit comprises a diode D1 and a resistor R6 which are connected in series, a capacitor C1 and a resistor R1 which are connected in parallel, a resistor R2 and a resistor R3 which are connected in series, the anode of the diode D1 is connected with the other end of the primary side of a transformer T1, the cathode of a diode D1 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the capacitor C1 and the resistor R1 respectively, the capacitor C1 and the resistor R1 are connected in parallel and then connected to one end of the primary side of a transformer T1, the other end of an inductor L1 is connected to the VCC end of a control chip U1 through the resistor R2 and the resistor R3, and the resistor R3 is connected with the capacitor C7.

Fuse F1 is connected in series between the input end of rectifier bridge DB1 and live wire incoming end L, plays the effect of protection to improve the security performance of circuit.

The high-voltage pulse absorption circuit is used for realizing high-voltage pulse absorption on the rectified and filtered high-voltage power to play a role in circuit protection, the electric energy conversion circuit is used for realizing stable low-voltage output under the control of the control circuit, and the output low-voltage current can be charged to external electric equipment to be charged through a charging terminal of the USB interface; meanwhile, a quick charge chip is arranged at the USB socket, a high-pass protocol QC2.0 or QC3.0 protocol is identified by the quick charge chip, communication is carried out by loading voltage on two lines (D & D-) in the middle of the USB socket, and the output voltage of QC2.0 is adjusted; the handshake process for high-pass QC2.0 is as follows: when the charger end is connected to the mobile phone through a data line, the charger defaults to short circuit of D + D-through an MOS, the mobile phone end detects that the type of the charger is DCP (special charging port mode), at the moment, the output voltage is 5v, and the mobile phone is normally charged; if the mobile phone supports a QC2.0 quick charging protocol, a voltage of 0.325V is loaded on the D +, and when the voltage is maintained for 1.5s, the charger disconnects the short circuit of the D + and the D-, and the voltage on the D-is reduced; after the mobile phone end detects the voltage drop on the D-, the HVDCP acquires a charger voltage value preset by the mobile phone.

The working principle of the USB charging circuit is as follows:

the commercial power is input through an alternating current power line, rectified through a rectifier bridge DB1, and input to a VCC end of a control chip U3 through a filter capacitor C11, a filter capacitor C10 and a filter inductor L1 to obtain a direct current power supply, one path of the direct current power supply is input to a VCC end of the control chip U3 through a starting resistor R2 and a starting resistor R3 to start the control chip U3 to work, the other path of the direct current power supply is input to a D end and a CS end of a control chip U1 through a transformer T1, a VS of the control chip U1 outputs a pulse signal to generate a changed voltage and current, the changed voltage and current pass through a primary side of the transformer T1, the voltage and current are induced on a secondary side of the transformer T1 to realize electric energy conversion, and a direct current charging power supply; in addition, the input synchronous rectification chip U4 carries out synchronous rectification on the direct current output by the secondary side of the transformer T1, so that the heat productivity of the circuit during operation is reduced; in addition, the OCC end of the control chip U3 inputs compensation voltage, the compensation voltage is output to the primary side of the transformer T1 through the VS end, voltage and current are induced on the secondary side of the transformer T1, voltage compensation is achieved, voltage loss of equipment wires is reduced, and input voltage of an equipment port is improved.

The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a two port USB socket that charges, includes socket ontology, the last two detachable USB sockets that are provided with of socket ontology, this internal USB charging circuit that is provided with of socket, USB charging circuit is connected its characterized in that with USB socket: the USB charging circuit comprises a rectifying circuit, a filter circuit, an electric energy conversion circuit, a control circuit, a high-voltage absorption circuit, a USB output circuit, a first USB interface circuit and a second USB interface circuit, wherein the input end of the filter circuit is connected with the output end of the rectifying circuit, the electric energy conversion circuit is connected with the filter circuit, the control circuit is connected with the electric energy conversion circuit, the high-voltage absorption circuit is arranged between the filter circuit and the electric energy conversion circuit, the electric energy conversion circuit is connected with the USB output circuit, and the USB output circuit is respectively connected with the first USB interface circuit and the second USB interface circuit; the control circuit comprises a control chip U3, the control chip U3 is LN1F15, a PWM/PFM/PBM control mode is adopted, the USB output circuit comprises an input synchronous rectification chip U4, the input synchronous rectification chip U4 is LN5S19A and an integrated rectification MOS tube, a VCC end of the input synchronous rectification chip U4 is connected with the electric energy conversion circuit through a diode D3 and a resistor R8 which are connected in series, an S end of the input synchronous rectification chip U4 is respectively connected with a pin 4 of a first USB and a pin 4 of a second USB, the first USB interface circuit comprises a quick-charging chip U1, the second USB interface circuit comprises a quick-charging chip U2, and the quick-charging chip U1 and the quick-charging chip U2 are both LN 4050.

2. The dual port USB charging socket according to claim 1, wherein: the electric energy conversion circuit comprises a transformer T1, one output end of a transformer T1 is connected with a power supply 5V/2.4A, the other output end of a transformer T1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected with the anode of a diode D3.

3. The dual port USB charging socket according to claim 2, wherein: the VDD end of the input synchronous rectification chip U4 is connected with a cathode of a diode D3 after being connected with capacitors C3 and C2 in series, the USB output circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a capacitor C8, a capacitor C9 and a resistor R9, and the capacitor C8, the capacitor C9 and the resistor R9 are arranged between one output end of the transformer T1 and the ground in parallel.

4. The dual port USB charging socket according to claim 3, wherein: the VS end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R11, the VCC end of the control chip U1 is connected with the output end of the high-voltage absorption circuit, the OCC end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R14, and the CS end of the control chip U1 is connected with the input end of the transformer T1 through a resistor R4 and a resistor R5 which are connected in parallel.

5. The dual port USB charging socket according to claim 4, wherein: the output end of the quick charging chip U1 is respectively connected with pins 2 and 3 of a first USB, the input end of the quick charging chip U1 is connected with a power supply 5V/2.4A, the output end of the quick charging chip U2 is respectively connected with pins 2 and 3 of a second USB, and the input end of the quick charging chip U2 is connected with the power supply 5V/2.4A; the USB socket is a CN socket.

6. The dual port USB charging socket according to claim 5, wherein: rectifier circuit includes live wire incoming end L, zero line incoming end N and rectifier bridge DB1, and live wire incoming end L and zero line incoming end N insert rectifier bridge DB 1's input is connected with thermistor RV between live wire incoming end L and the zero line incoming end N, thermistor RV and rectifier bridge DB 1's input parallel connection.

7. The dual port USB charging socket according to claim 6, wherein: the filter circuit comprises an inductor L1 and a resistor R10 which are connected in parallel, one end of the inductor L1 is connected with the output end of the rectifier bridge DB1 through a capacitor C11, and the other end of the inductor L1 is connected to the input end of the transformer T1 and is grounded through a capacitor C10.

8. The dual port USB charging socket according to claim 7, wherein: the control circuit further comprises a resistor R12 and a resistor R13 which are connected in parallel, a capacitor C6 and a capacitor C7 which are connected in parallel, and a diode D2 and a resistor R7 which are connected in series, wherein the VS end of the control chip U1 is grounded through the resistor R12 and the resistor R13, one end of the resistor R7 is connected with the resistor R11, the other end of the resistor R7 is connected with the anode of the diode D2, and the cathode of the diode D2 is connected with the capacitor C6.

9. The dual port USB charging socket according to claim 8, wherein: the high-voltage absorption circuit comprises a diode D1 and a resistor R6 which are connected in series, a capacitor C1 and a resistor R1 which are connected in parallel, and a resistor R2 and a resistor R3 which are connected in series, wherein the anode of the diode D1 is connected with the input end of a transformer T1, the cathode of a diode D1 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with a capacitor C1 and a resistor R1 respectively, the capacitor C1 and a resistor R1 are connected in parallel and then connected to the input end of a transformer T1, the other end of an inductor L1 is connected to the VCC end of a control chip U1 through a resistor R2 and a resistor R3, and the resistor R3 is connected with a capacitor C7 and a capacitor.

10. The dual port USB charging jack of any one of claims 6-9, wherein: the transformer T1 is a three-winding transformer, and a fuse F1 is connected in series between the input end of the rectifier bridge DB1 and the live wire access end L.