CN205178577U - Fast Charge Multi-Interface Charger - Google Patents

Abstract

A quick-charging multi-interface charger with multiple interfaces, multi-level voltage output and a charging identification function. The USB quick charging device comprises at least two USB interfaces and a power supply control circuit which are arranged in parallel, wherein at least one of the USB interfaces can be a USB quick charging interface for quickly charging a mobile phone, a tablet or other mobile terminals, the output power of the USB quick charging interface can be automatically identified and output 5V/2A, 9V/1.67A or 12V/1.2A according to the load type, and the rest USB interfaces are common USB interfaces. The utility model discloses with the integrated multiple voltage current output of a charger, accord with domestic most charging device's demand.

Description

Fast Charge Multi-Interface Charger

technical field

The utility model relates to a portable charger, in particular to a charger with fast charging and multiple interfaces.

Background technique

At present, there are many household charging devices, and the charging voltage and current required by each device are different. Currently, the chargers on the market have a single output and a single specification. One charger cannot meet the demand, so a variety of chargers should be equipped at home. . Inconvenient and messy to place.

Contents of the invention

The technical problem to be solved by the utility model is to provide a fast charging multi-interface charger with multiple interfaces, multi-level voltage output and charging identification function.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

The fast charging multi-interface charger includes at least two USB interfaces and a power control circuit arranged side by side, and is characterized in that: at least one of the USB interfaces can be used for fast charging of mobile phones or tablets. The output power of the charging interface is 5V/2A, 9V/1.67A or 12V/1.2A, and the rest of the USB interfaces are ordinary USB interfaces.

The power supply control circuit is provided with a fast charging and boosting circuit, and the fast charging and boosting circuit is composed of an eleventh inductor, a fifth MOS transistor, an eighth control boosting chip and a tenth filter capacitor.

The USB fast charging interface meets the QC2.0&MTK fast charging protocol.

The USB fast charging interface is one, and the common USB interface is four.

The eighth control boost chip is a chip of model MG26P701, and the fifth MOS tube is a switch tube of model SM8205A.

Compared with the prior art, the fast charging multi-interface charger of the present invention adopts at least two USB interfaces and power control circuits arranged side by side, and at least one of the USB interfaces can be used for mobile phones, tablets or other mobile phones. The USB fast charging interface for fast charging of the terminal, the output power of the USB fast charging interface can automatically identify and output 5V/2A, 9V/1.67A or 12V/1.2A according to the load type, and the rest of the USB interfaces are ordinary USB interfaces.

The utility model integrates a charger with multiple voltage and current outputs, which meets the needs of most charging devices for household use.

Description of drawings

Fig. 1 is a schematic diagram of the appearance of the utility model.

Fig. 2 is the circuit block diagram of the utility model.

Fig. 3 is a schematic circuit diagram of a charger in the prior art.

FIG. 4 is a schematic diagram of the fast charging circuit of the present invention.

Figure 5 is a circuit diagram of the USB port output overcurrent protection.

The reference signs are as follows:

Charger 1, USB fast charging interface 2, normal USB interface 3.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, the fast charging multi-interface charger of the present invention includes a casing and a power control circuit arranged in the casing, on which at least two USB interfaces are arranged side by side, wherein at least one of them can be a mobile phone or a tablet. Or other mobile terminals for fast charging USB fast charging interface 2, the USB fast charging interface 2 output power can be 5V/2A, 9V/1.67A or 12V/1.2A and conform to QC2.0&MTK fast charging protocol, the maximum output is 15W (High power charging greatly reduces charging time). The rest of the USB interfaces are common USB interfaces 3, and the output current of each USB interface is controlled separately.

The utility model selects one USB fast charging interface 2 and four common USB interfaces 3 . The USB fast charging interface 2 can be distinguished from the ordinary USB interface by special marking or the use of different colored USB rubber cores.

The output powers of the four common USB ports 3 are one 5V/2.4A, two 5V/2.1A and one 5V/1A respectively. Among them, 5V/2.4A can charge IPad, 5V/2.1A can charge ordinary large-screen smartphones and tablets, and 5V/1A can charge ordinary mobile phones or other devices.

As shown in FIG. 5 , the output current limiting of the common USB interface 3 is accomplished by the current limiting control chip U4 . Each two groups of outputs use a current-limiting control chip U4 to complete the current-limiting function. When the output current is large, the voltage drop of the parallel resistance formed by the first group of RS1 and RS1A will also increase. When the voltage reaches the current-limiting control chip When the "SEN1" pin of U4 is at the reference voltage, the "OUT1" pin of the current-limiting control chip U4 controls the first switch tube Qsen1 to turn off, thereby blocking the output voltage and current, and protecting the charging device at the back end. It also makes each group output independently of each other, and an exception in one group does not affect the output of other groups.

The power supply control circuit is provided with a fast charge boost circuit, and the fast charge boost circuit is composed of an eleventh inductor L11, a fifth MOS transistor Q5, an eighth control boost chip U8 and a tenth filter capacitor EC10.

The eighth control boost chip U8 is a chip with a model of MG26P701, and the fifth MOS transistor Q5 is a switch tube with a model of SM8205A.

The working principle of the fast charge boost circuit of the present utility model is as follows:

As shown in Figure 4, the fast charge boost circuit boosts the 5V voltage to the high voltage output by the fast charge, and the eleventh inductance L11 is an energy storage inductance. When the eighth control boost chip U8 drives the fifth MOS transistor Q5 to turn on, the first The eleventh inductor L11 charges and stores energy. When the eighth control boost chip U8 is deactivated, the fifth MOS transistor Q5 is turned off, and the energy released by the eleventh inductor L11 is superimposed on 5V to increase the output voltage of the USB fast charging interface.

The output voltage is divided by R35 and R36, and the input signal is sent to the "FB" pin of the eighth control boost chip U8, and the eighth control boost chip U8 controls the switch of the fifth MOS transistor Q5 according to the obtained signal, thereby controlling the USB fast charging interface The level of the output voltage. D+ and D- of USB give signals to the eighth control boost chip U8 according to the QC2.0 standard, and the eighth control boost chip U8 adjusts the reference voltage of the "FB" pin according to the signals given by D+ and D-, thereby changing the USB fast charge The output voltage of the interface meets the QC2.0 standard. When the output current is large, the presser foot formed on the twenty-fifth resistor R25 is relatively large, and when the voltage drop is greater than the detection pin voltage of the "Current_DET" pin of the eighth control boost chip U8, the eighth control boost chip U8 will The seventh MOS transistor Q7 is turned off, thereby turning off the output voltage and current of the USB fast charging interface, so as to achieve the function of overcurrent protection.

Claims (5)

1. A fast charging multi-interface charger, comprising at least two USB interfaces and a power control circuit arranged side by side, is characterized in that: at least one of the USB interfaces can be used for mobile phone or flat panel fast charging USB fast charging interface (2), the output power of the USB fast charging interface (2) is 5V/2A, 9V/1.67A or 12V/1.2A, and the remaining USB interfaces are ordinary USB interfaces (3). 2. The fast charge multi-interface charger according to claim 1, characterized in that: the power supply control circuit is provided with a fast charge boost circuit, the fast charge boost circuit is composed of the eleventh inductor (L11), the first Five MOS transistors (Q5), the eighth control boost chip (U8) and the tenth filter capacitor (EC10) constitute. 3. The fast charging multi-interface charger according to claim 2, characterized in that: the USB fast charging interface (2) meets the QC2.0&MTK fast charging protocol. 4. The fast charging multi-interface charger according to claim 1, characterized in that: there is one USB fast charging interface (2), and there are four ordinary USB interfaces (3). 5. The fast charging multi-interface charger according to claim 1, characterized in that: the eighth control boost chip (U8) is a chip with a model of MG26P701, and the fifth MOS tube (Q5) is a chip with a model of The switching tube of SM8205A.