CN203722283U - Charging cable and charging system - Google Patents

Abstract

The utility model discloses a charging cable and a charging system, wherein the charging cable includes a charging chip, a charger judging module and a configuration resistor. The charging chip is connected with the charger judging module. The charger judging module is used for judging the magnitude of input voltage. The charging chip performs current output based on judgment results of the charger judging module. One end of the configuration resistor is connected to the charging chip while the other end is in grounding connection. The configuration resistor is used for configuring charging current. By adopting the charging cable, a problem of quick charging of a large-capacitor smart phone can be solved and charging efficiency can be improved.

Description

Charging cable and charging system

technical field

The utility model discloses a charging cable and a charging system, in particular to a charging cable and a charging system applied to terminal charging.

Background technique

At present, smart phones have become one of the indispensable items in consumers' life and work. With the rapid development of smart phones, the screens are getting bigger and bigger, and the application range is getting wider and wider. In addition, the 4G era is approaching, and energy consumption is increasing. bigger. In order to meet the battery life, the battery capacity must be bigger and bigger, and the resulting problem is the charging efficiency. When charging every day, if the charging time is too long, it will waste consumers' time and affect consumers' work and life. .

Utility model content

In order to solve the existing technical problems, the utility model provides a charging cable and a charging system.

The utility model provides a charging cable, which includes a charging chip, a charger judging module and a configuration resistor, wherein the charging chip is connected to the charger judging module, the charger judging module is used to judge the input voltage, and the charging The chip performs current output according to the judgment result of the charger judging module. One end of the configuration resistor is connected to the charging chip, and the other end is grounded. The configuration resistor is used to configure the charging current.

It also includes a power inductor connected to the output terminal of the charging chip.

The input voltage threshold received by the charging chip ranges from 5V to 16V, and the maximum output current threshold is 4A.

The interfaces at both ends of the charging cable are USB interfaces.

The utility model also provides a charging system, including a charging cable and a terminal matched with the charging cable, the charging cable includes a charging chip, a charger judging module and a configuration resistor, wherein the charging chip and the charger judging The modules are connected, the charger judging module is used to judge the input voltage, the charging chip performs current output according to the judging result of the charger judging module, one end of the configuration resistor is connected to the charging chip, and the other end is grounded, so The above configuration resistor is used to configure the charging current;

The terminal includes a P-channel MOSFET controlled by a baseband processing chip.

The terminal also includes a fuel gauge.

The input voltage threshold received by the charging chip ranges from 5V to 16V, and the maximum output current threshold is 4A.

The interfaces at both ends of the charging cable are USB interfaces.

The charging system also includes a power adapter, and the interface of the power adapter is a USB interface.

The charging system also includes a computer.

Compared with the prior art, the utility model has at least the following advantages: it can solve the problem of fast charging of large-capacity smartphones and improve charging efficiency. By transplanting the charging circuit in the existing mobile phone into the charging cable provided by the utility model, on the one hand, the area of the motherboard of the smart phone can be saved, on the other hand, the heat consumption generated by the charging circuit can be reduced, and the system stability can be improved.

Description of drawings

Fig. 1 is a schematic diagram of the charging cable provided by the utility model.

Fig. 2 is a schematic diagram of the charging system provided by the utility model.

Fig. 3 is a schematic diagram of an existing charging system.

Detailed ways

The technical scheme of the utility model is further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is an embodiment of a charging cable provided by the utility model. As shown in Figure 1, the charging cable includes a charging chip, a charger judging module, namely the CHARGER judging chip in Fig. The input voltage is large, the charging chip performs current output according to the judgment result of the charger judging module, one end of the configuration resistor is connected to the charging chip, and the other end is grounded, and the configuration resistor is used to configure the charging current.

The charging cable also includes a power inductor connected to the output terminal of the charging chip. The input voltage threshold received by the charging chip ranges from 5V to 16V, and the maximum output current threshold is 4A. The interfaces at both ends are USB interfaces.

Figure 1 is a charging cable with a USB interface. A charging circuit module is built in the cable near the mobile phone. The charging module is connected in series to the VBUS signal. The charging chip can adapt to the input level of 5V-16V, and the maximum output can reach 4A. The external power inductor is an ultra-low DC impedance power inductor to reduce energy loss. The external charging current configuration resistor is used to configure a fixed maximum charging current. The USB and CHARGER judgment chips are used to identify whether the charging device is a PC or a charger. Thereby adjusting the charging current at the two charging interfaces.

Fig. 2 is an embodiment of a charging system provided by the utility model. As shown in Figure 2, module one is an AC/DC power adapter, which increases the output voltage of a traditional smartphone charger from 5V to 16V, and the output current to 4A, and the USB interface, D+, and D- are shorted internally.

Module 2 is a charging cable with a USB interface. A charging circuit module is built in the cable near the mobile phone. The charging module is connected in series to the VBUS signal. The charging chip can adapt to the input level of 5V-16V, and the maximum output can reach 4A. The external power inductor is an ultra-low DC impedance power inductor to reduce energy loss. The external charging current configuration resistor is used to configure a fixed maximum charging current. The USB and CHARGER judgment chips are used to identify whether the charging device is a PC or a charger. Thereby adjusting the charging current at the two charging interfaces.

Module 3 is the charging management module built into the smartphone. The fuel gauge is used to monitor whether the battery is fully charged. When it is fully charged, the charging channel can be closed by turning off the P-channel mosfet to complete the charging.

Connect one end of module two to module one, and the other end to the USB port of the smartphone;

When the mobile phone is turned off, if module 3 detects that the VBUS voltage of the USB interface of the mobile phone is lower than the constant current charging level threshold set by the system, the baseband chip controls the opening degree of the P-mos to make the system work in the trickle charging mode until the VBUS voltage When the level reaches the constant current charging level threshold, the system starts up and enters the constant current mode.

Module 2 contains a charger judgment chip. This chip can judge the type of device of module 1 through whether the D+ and D- signals of the USB are short-circuited. When D+ and D- are short-circuited, the module 1 is a charger. When D+, D- D- When there is no short circuit, module one is PC. When module 1 is a charger, it is connected to the mobile phone through module 2, and the charger in module 2 judges that the chip outputs a high level and instructs the charging chip to switch to high current output mode; when module 1 is a PC, it is connected to the mobile phone through module 2, and the module In the second stage, the charger judges that the chip outputs a low level, and instructs the charging chip to switch to the normal current output mode. At the same time as the charging device is completed, the baseband processing chip of the mobile phone recognizes that the charger is plugged in through the ADC module, and the baseband processing chip will turn on the P-channel mosfet of module 4 to enter the fast charging mode, and the constant current charging current is 4A. When the battery After the voltage reaches 4.2V, it will automatically enter the constant voltage mode charging, and the charging current will gradually decrease;

The fuel gauge in module 3 can record the charging process, and the battery power is recorded by the fuel gauge. During the charging process, the fuel gauge in module 3 keeps monitoring the battery power. When the battery power reaches a full state, the fuel gauge will be fully charged. The information is reported to the baseband processing chip through the I2C interface, and the baseband processing chip will output a control signal to turn off the P-channel mosfet, and the mobile phone interface will pop up "charging completed".

Fig. 3 is a schematic diagram of an existing charging system. The charging circuit is all placed in the mobile phone. Compared with the prior art, the charging system provided by the utility model transplants the charging path in the existing mobile phone into the charging cable provided by the utility model. On the one hand, it can save the area of the main board of the smart phone , On the other hand, it can reduce the heat consumption generated by the charging circuit and improve the system stability.

The above is only one implementation of the utility model, not all or the only implementation. Any equivalent changes to the technical solution of the utility model adopted by those of ordinary skill in the art by reading the specification of the utility model shall be considered as the present invention. covered by the claims of the utility model.

Claims (10)

1. a charging cable, it is characterized in that, comprise charging chip, charger judge module and configuration resistance, wherein, described charging chip is connected with charger judge module, and described charger judge module is used for judging input voltage size, described charging chip carries out electric current output according to the judged result of described charger judge module, described configuration resistance one end is connected on charging chip, other end ground connection, and described configuration resistance is used for configuring charging current.

2. a kind of charging cable according to claim 1, is characterized in that, also comprises power inductance, and described power inductance is connected on described charging chip output.

3. a kind of charging cable according to claim 1, is characterized in that, the input voltage threshold range that described charging chip receives is 5V-16V, and the threshold value of output current is up to 4A.

4. according to a kind of charging cable described in claim 1～3 any one, it is characterized in that, two end interfaces of described charging cable are USB interface.

5. a charging system, comprise charging cable and the terminal matching with charging cable, it is characterized in that, described charging cable comprises charging chip, charger judge module and configuration resistance, wherein, described charging chip is connected with charger judge module, described charger judge module is used for judging input voltage size, described charging chip carries out electric current output according to the judged result of described charger judge module, described configuration resistance one end is connected on charging chip, other end ground connection, described configuration resistance is used for configuring charging current;

Described terminal comprises the P channel mosfet of being controlled by baseband processing chip.

6. a kind of charging system according to claim 5, is characterized in that, described terminal also comprises voltameter.

7. a kind of charging system according to claim 5, is characterized in that, the input voltage threshold range that described charging chip receives is 5V-16V, and the threshold value of output current is up to 4A.

8. a kind of charging system according to claim 5, is characterized in that, two end interfaces of described charging cable are USB interface.

9. according to a kind of charging system described in claim 5～8 any one, it is characterized in that, also comprise power supply adaptor, described power supply adaptor interface is USB interface.

10. according to a kind of charging system described in claim 5～8 any one, it is characterized in that, also comprise computer.