CN209249820U - A kind of double USB sockets of five pore areas - Google Patents

Abstract

The utility model relates to a kind of double USB sockets of five pore areas, and socket includes rectification circuit, filter circuit, transformer, metal-oxide-semiconductor, control circuit, primary side feedback circuit, circuit of synchronous rectification, USB identification circuit and two USB jacks；Rectification circuit is connect with ac input end, and it is that control circuit is powered that filter circuit exports all the way after connecting with rectification circuit, and another way is connect after the primary coil of transformer with the drain electrode of metal-oxide-semiconductor；One end of primary side feedback circuit connects to the control circuit, the ancillary coil connection of the other end and transformer；Control circuit is connect with metal-oxide-semiconductor；The secondary coil of transformer is connect with circuit of synchronous rectification, and the output end of circuit of synchronous rectification is connect after filtering with USB identification circuit and two USB jacks.The utility model has both to charge two kinds of functions for electrical appliance power supply and USB, it is convenient and practical and can automatic identification and matching unit charging current, outputting current steadily can protect device battery.

Description

A kind of double USB sockets of five pore areas

Technical field

The utility model relates to jack technology fields, in particular to a kind of double USB sockets of five pore areas.

Background technique

Five spring hole scokets be by one two insert and three insert group at power outlet, space utilization is reasonable, it is economical and practical, It is easy to use, it is one of most common socket in daily life.

With the rapid development of electronic technology, the electronic equipments such as mobile phone and tablet computer have become a kind of important tool, It occupies an important position in daily life and work and study.Existing electronic product mostly uses greatly USB interface to carry out Charging, five traditional spring hole scokets do not have USB jack, have been unable to meet the demand of the modern life.Therefore, occurs tool in the market There are five spring hole scokets of USB jack, but the output electric current of existing this kind of socket is single, and each electronic product is due to battery specifications Difference, required charging current is also different, using unmatched electric current acceleration cell degradation easy to charge, shortens the battery longevity Life, or even battery is caused to overheat, cause the damage of electronic equipment and socket.

Summary of the invention

The purpose of this utility model is to provide a kind of double USB sockets of five pore areas, output is stablized, can Auto-matching charging The charging current of equipment, and there is overheating protection, securely and reliably.

A kind of double USB sockets of five pore areas, the socket include rectification circuit, filter circuit, transformer, metal-oxide-semiconductor, control electricity Road, primary side feedback circuit, circuit of synchronous rectification, USB identification circuit and two USB jacks；The rectification circuit with exchange it is defeated Enter end connection, it is that the control circuit is powered that the filter circuit exports all the way after connecting with the rectification circuit, another way warp It is connect after crossing the primary coil of the transformer with the drain electrode of the metal-oxide-semiconductor；One end of the primary side feedback circuit and the control The ancillary coil of circuit connection processed, the other end and transformer connects；The control circuit is connect with the metal-oxide-semiconductor, for controlling The on and off of metal-oxide-semiconductor；The secondary coil of the transformer is connect with the circuit of synchronous rectification, the circuit of synchronous rectification Output end connect after filtering with the USB identification circuit and two USB jacks.

Preferably, the rectification circuit is full bridge rectifier, and two input terminals of the full bridge rectifier are separately connected The firewire input terminal and zero curve input terminal of input are exchanged, the filter circuit is connect with the output end of the full bridge rectifier.

Preferably, the filter circuit is π type filter circuit.

It preferably, further include drain electrode clamp circuit, the parallel connection of primary windings of the drain electrode clamp circuit and the transformer It is connect afterwards with the drain electrode of the metal-oxide-semiconductor.

Preferably, the control circuit includes control chip, and the control chip is OB2560.

Preferably, the control circuit includes the thermistor for testing product temperature, the thermistor with it is described Control chip connection.

Preferably, the circuit of synchronous rectification includes rectification chip, and the rectification chip is OB2301.

Preferably, the USB identification circuit includes identification chip, and the identification chip is RH7902A.

Compared with prior art, it charges two kinds the utility model has the beneficial effects that: having both for electrical appliance power supply and USB Function is easy to use, improves practicability.By the way that USB identification circuit is arranged, can automatic identification and matching unit charging electricity Stream, to protect device battery.By the way that circuit of synchronous rectification is arranged, makes outputting current steadily while reducing rectifier loss.Temperature-sensitive Resistance can incude product temperature, prevent equipment and socket from overheating and generating danger, improve safety.

Detailed description of the invention

Fig. 1 is the functional block diagram of the double USB sockets of five pore areas of the utility model.

Fig. 2 is the circuit diagram of the double USB sockets of five pore areas of the utility model.

Specific embodiment

To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein Described embodiment.

As shown in Figure 1, the double USB sockets of five pore areas of the utility model mainly include rectification circuit 100, filter circuit 200, Transformer 700, drain electrode clamp circuit 500, metal-oxide-semiconductor 600, control circuit 300, primary side feedback circuit 400, circuit of synchronous rectification 800, USB identification circuit 900 and two USB jacks USB1 and USB2.The input terminal of rectification circuit 100 and the firewire of alternating current Input terminal L is connected with zero curve input terminal N, and output end is connect with filter circuit 200, is exported all the way after the filtering of filter circuit 200 For the power supply of control circuit 300, the other end is connect after the primary coil of transformer 700 with the drain electrode of metal-oxide-semiconductor 600.Primary side is anti- 400 one end of current feed circuit is connect with control circuit 300, and the other end is connect with the ancillary coil of transformer 700.Control circuit 300 with Metal-oxide-semiconductor 600 connects, for controlling the on and off of metal-oxide-semiconductor 600.The secondary coil and circuit of synchronous rectification of transformer 700 800 connections, the output end of the circuit of synchronous rectification 800 are connect with USB identification circuit 900 and two USB jacks USB1 and USB2.

Referring to FIG. 2, rectification circuit 100 includes the complete of four diode compositions in specific embodiment of the utility model Bridge rectification circuit BR1, the rectified circuit 100 of mains supply export after being rectified into direct current to filter circuit 200.

Filter circuit 200 is π type filter circuit comprising capacitor C1, capacitor C2, inductance L1 and inductance L2, electric current is through filtering Wave circuit 200 is filtered into more stable direct current.The output end of filter circuit 200 exports all the way powers for control circuit 300, separately The primary coil through transformer 700 reaches the drain electrode of metal-oxide-semiconductor Q1 all the way.

The parallel connection of primary windings of drain electrode clamp circuit 500 and transformer 700, drain electrode clamp circuit 500 include resistance R4, electricity Hinder R5, capacitor C3, resistance R6 and diode D3.Resistance R4, resistance R5 and resistance R6 are connected in parallel on the output of filter circuit 200 End, capacitor C3 are connected between resistance R5 and resistance R6, and the cathode of diode D3 is connect with R6, the drain electrode of anode and metal-oxide-semiconductor Q1 Connection.Drain electrode clamp circuit 500 is for limiting crest voltage, to protect metal-oxide-semiconductor Q1.

Control circuit 300 mainly includes controlling chip U1, and in the present embodiment, control chip U1 uses OB2560.Control core Piece U1 is connect after passing through resistance R14 with the grid of metal-oxide-semiconductor Q1, for controlling the on and off of metal-oxide-semiconductor Q1.Control circuit 300 It further include being connect after thermistor NTC2, thermistor NTC2 and resistance R11 connect with control chip U1, for incuding product Temperature, when temperature beyond setting value after, thermistor NTC2 feedback signal to control chip U1, control chip U1 shutdown Metal-oxide-semiconductor Q1, so that not exporting.

Primary side feedback circuit 400 mainly includes resistance R7, diode D2, resistance R8, resistance R9 and resistance R10.Resistance R7 It is connect with the cathode of diode D2, the anode of diode D2 is connect with the ancillary coil T1B of transformer 700, and resistance R8 is connected to Between the anode and control chip U1 of diode D2, it is grounded after resistance R9 and resistance R10 parallel connection.Primary side feedback circuit 400 is used for It monitors the output state of transformer 700 and feeds back to control chip U1.

Circuit of synchronous rectification 800 is connect with the secondary coil of transformer 700, mainly includes rectification chip U2 and metal-oxide-semiconductor Q2, rectification chip U2 are connect by resistance R17 with the grid of metal-oxide-semiconductor Q2, whole to synchronize to electric current for controlling metal-oxide-semiconductor Q2 Stream.Electric current after rectified is straight using output 5V after the π type filter circuit filtering being made of capacitor C5, capacitor C6 and inductance L3 Galvanic electricity pressure.In the present embodiment, rectification chip U2 is OB2301.

USB identification circuit 900, the first USB jack USB1 and the second USB jack USB2 are connect with 5V DC voltage.USB Identification circuit 900 includes mainly identification chip D4, is connect with the first USB jack USB1 and the second USB jack USB2, for knowing The equipment not connected.In the present embodiment, identification chip D4 is RH7902A.

Although the description combination embodiments above to the utility model carries out, it is familiar with the art Personnel can carry out many replacements based on the above contents, modifications and variations, be obvious.Therefore, all such Substitution, improvements and changes are included in the spirit and scope of appended claims.

Claims (8)

1. a kind of double USB sockets of five pore areas, which is characterized in that the socket includes rectification circuit, filter circuit, transformer, MOS Pipe, control circuit, primary side feedback circuit, circuit of synchronous rectification, USB identification circuit and two USB jacks；The rectified current Road is connect with ac input end, and it is that the control circuit supplies that the filter circuit exports all the way after connecting with the rectification circuit Electricity, another way are connect after the primary coil of the transformer with the drain electrode of the metal-oxide-semiconductor；The one of the primary side feedback circuit End is connect with the control circuit, the ancillary coil connection of the other end and transformer；The control circuit and the metal-oxide-semiconductor connect It connects, for controlling the on and off of metal-oxide-semiconductor；The secondary coil of the transformer is connect with the circuit of synchronous rectification, described The output end of circuit of synchronous rectification is connect after filtering with the USB identification circuit and two USB jacks.

2. the double USB sockets of five pore area according to claim 1, which is characterized in that the rectification circuit is full-bridge rectification electricity Road, two input terminals of the full bridge rectifier are separately connected the firewire input terminal and zero curve input terminal of exchange input, the filter Wave circuit is connect with the output end of the full bridge rectifier.

3. the double USB sockets of five pore area according to claim 1 or 2, which is characterized in that the filter circuit is the filtering of π type Circuit.

4. the double USB sockets of five pore area according to claim 1, which is characterized in that further include drain electrode clamp circuit, the leakage Pole clamp circuit is connect with after the parallel connection of primary windings of the transformer with the drain electrode of the metal-oxide-semiconductor.

5. the double USB sockets of five pore area according to claim 1, which is characterized in that the control circuit includes control chip, The control chip is OB2560.

6. the double USB sockets of five pore area according to claim 5, which is characterized in that the control circuit includes for detecting The thermistor of product temperature, the thermistor are connect with the control chip.

7. the double USB sockets of five pore area according to claim 1, which is characterized in that the circuit of synchronous rectification includes rectification Chip, the rectification chip are OB2301.

8. the double USB sockets of five pore area according to claim 1, which is characterized in that the USB identification circuit includes identification core Piece, the identification chip are RH7902A.