CN204376458U - A kind of mobile terminal and charging device - Google Patents

Abstract

The utility model relates to the technical field of charging. The utility model provides a mobile terminal and a charging device. The charging device includes a charging interface, a charging switch, a power management chip and at least two charging chips; the voltage output end of the charging switch is connected to each charging chip The voltage input terminal of each charging chip is connected to the battery, the output terminal of the power management chip is connected to the control terminal of the charging switch, and the power management chip controls the voltage input terminal of the charging switch and the voltage of the charging switch through the control terminal of the charging switch. Connect or disconnect the output terminals. By setting at least two charging chips, the large output current will be evenly distributed on at least two charging chips during fast charging, so that each charging chip will not emit a lot of heat, avoiding Solved the problem of the temperature rise of the mobile terminal during fast charging.

Description

A mobile terminal and charging device

technical field

The utility model relates to the technical field of charging, in particular to a mobile terminal and a charging device.

Background technique

As the entertainment and playability of smart terminals are getting higher and higher, the problem of high power consumption of mobile phones is becoming more and more serious. Therefore, the above problems are solved by fast charging, that is, high voltage or high current is usually used to realize the charging of smart terminals. Fast charging, whether it is a high-voltage method or a high-current method, in the process of fast charging, due to the limitation of the efficiency of the charging chip, the charging chip will generate a lot of heat. The use of high current charging during fast charging causes the temperature of the charging chip to rise.

Utility model content

The purpose of the utility model is to provide a mobile terminal and a charging device, aiming to solve the problem in the prior art that the temperature of the charging chip increases due to high current charging during charging.

The utility model is achieved in this way. In the first aspect, a fast charging device for a mobile terminal is provided, and the charging device includes a charging interface, a charging switch, a power management chip and at least two charging chips;

The voltage input end of the charging interface is connected to an external power supply, the voltage output end of the charging interface is connected to the voltage input end of the charging switch, the voltage output end of the charging switch is connected to the voltage input end of each of the charging chips, The first voltage output terminal of each of the charging chips is connected to the battery, and the output terminal of the power management chip is connected to the control terminal of the charging switch;

The power management chip controls the connection or disconnection between the voltage input terminal of the charging switch and the voltage output terminal of the charging switch through the control terminal of the charging switch.

With reference to the first aspect, in a first possible implementation manner, the first voltage detection terminal of the power management chip is connected to the voltage output terminal of the charging switch;

After the power management chip detects the voltage value output by the charging switch through the first voltage detection terminal, according to the voltage value output by the charging switch, controls the charging switch through the control terminal of the charging switch. The voltage input terminal is connected or disconnected from the voltage output terminal of the charging switch.

With reference to the first possible implementation of the first aspect, in a second possible implementation, when the power management chip detects that the voltage value output by the charging switch is less than or equal to the first preset voltage value, The power management chip controls the disconnection between the voltage input terminal of the charging switch and the voltage output terminal of the charging switch through the control terminal of the charging switch.

With reference to the first aspect or the first or second possible implementation of the first aspect, in a third possible implementation, the second voltage detection terminal of the power management chip is connected to the voltage input terminal of the battery ;

After the power management chip detects the input voltage value of the battery through the second voltage detection terminal, the power management chip controls the battery through the control terminal of the charging switch according to the input voltage value of the battery. The voltage input terminal of the charging switch is connected or disconnected from the voltage output terminal of the charging switch.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, when the power management chip detects that the input voltage value of the battery is greater than or equal to the second preset voltage value, the The power management chip controls the disconnection between the voltage input terminal of the charging switch and the voltage output terminal of the charging switch through the control terminal of the charging switch.

With reference to the first aspect or any one of the first to fourth possible implementations of the first aspect, in a fifth possible implementation, the data output terminal of the charging interface and the data of the charging switch The input terminal is connected, and the data output terminal of the charging switch is connected with the data input terminal of the power management chip;

When a short circuit occurs between the voltage output terminal of the charging interface and the data output terminal of the charging interface, the charging switch disconnects the connection between the data input terminal of the charging switch and the data output terminal of the charging switch, or, the The power management chip controls the charging switch to disconnect the data input terminal of the charging switch from the data output terminal of the charging switch.

With reference to the first aspect or any one of the first to fifth possible implementations of the first aspect, in a sixth possible implementation, the at least two charging chips include a first charging chip, and the The second voltage output terminal of the first charging chip is connected to the voltage input terminal of the system circuit, and the first charging chip supplies power for the battery and the system circuit.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the charging device further includes a first switching device, and a voltage input terminal of the first switching device is connected to the voltage of the battery output terminal, the voltage output terminal of the first switching device is connected to the voltage input terminal of the system circuit, and the data output terminal of the first charging chip is connected to the control terminal of the first switching device;

When the first charging chip supplies power to the battery and the system circuit, the first charging chip controls the voltage input terminal of the first switching device to connect with the first switching device through the control terminal of the first switching device. A switching device is disconnected between the voltage output terminals.

With reference to the first aspect or any one of the first to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner, the charging device further includes a second switching device, and the second The voltage input end of the switching device is connected to the voltage output end of the charging interface, the voltage output end of the second switching device is connected to the voltage input end of the charging switch, and the second switching device is in a negative voltage when the input voltage is negative. open circuit state.

In a second aspect, the present invention further provides a mobile terminal, including the fast charging device and the battery provided in any one of the first to seventh possible implementation manners of the first aspect.

The utility model provides a mobile terminal and a charging device. The charging device includes a charging interface, a charging switch, a power management chip and at least two charging chips; since the charging device is provided with two charging chips, the output current can be Evenly distributed on the at least two charging chips, so that each charging chip does not emit a large amount of heat, avoiding the problem of the temperature rise of the mobile terminal during charging, which can improve the safety of mobile phone use and improve user experience; and , because the power management chip can control the connection or disconnection between the voltage input terminal of the charging switch and the voltage output terminal of the charging switch, so that the electrical connection between the charging chip and the charging interface can be disconnected when necessary, and the mobile phone can be further improved. Safety of use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the practical For some novel embodiments, those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic structural view of a charging device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a charging device provided by another embodiment of the present invention;

Fig. 3 is a circuit diagram of a charging switch in a charging device provided by an embodiment of the present invention;

Fig. 4 is a circuit diagram of a charging chip in a charging device provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

In order to illustrate the technical solution of the utility model, the following specific examples are used for illustration.

An embodiment of the present invention provides a charging device. As shown in FIG. 1 , the charging device includes a charging interface 101 , a charging switch 102 , a power management chip 104 and at least two charging chips 103 and 110 .

The voltage input end of the charging interface 101 is connected to an external power supply, the voltage output end of the charging interface 101 is connected to the voltage input end of the charging switch 102, the data output end of the charging switch 102 is connected to the data input end of the power management chip 104, and the voltage output end of the charging switch 102 terminal is connected to the voltage input terminal of each charging chip, the first voltage output terminal of each charging chip is connected to the battery 105, and the output terminal of the power management chip 104 is connected to the control terminal of the charging switch 102.

The power management chip 104 controls the connection or disconnection between the voltage input terminal of the charging switch 102 and the voltage output terminal of the charging switch 102 through the control terminal of the charging switch 102 .

As an implementation of this embodiment, FIG. 1 shows a schematic structural diagram when there are two charging chips, where the charging chips include a first charging chip 103 and a second charging chip 110 .

Optionally, the first voltage detection terminal of the power management chip 104 is connected to the voltage output terminal of the charging switch 102. After the power management chip 104 detects the voltage value output by the charging switch 102 through the first voltage detection terminal, it The voltage value output by 102 controls the connection or disconnection between the voltage input terminal of the charging switch 102 and the voltage output terminal of the charging switch 102 through the control terminal of the charging switch 102 . Further, when the power management chip 104 detects that the voltage value output by the charging switch 102 is less than or equal to the first preset voltage value, the power management chip 104 controls the voltage input terminal of the charging switch 102 and the voltage input terminal of the charging switch 102 through the control terminal of the charging switch 102. Connect or disconnect between voltage output terminals.

In this embodiment, specifically, during the charging process, when the power management chip 104 detects that the voltage output by the charging switch suddenly drops below a certain threshold voltage, it is determined that the first charging chip 103 and/or the second The second charging chip 110 has been broken down, that is, the first charging chip 103 and/or the second charging chip 110 fails, and the first charging chip 103 and/or the second charging chip 110 will directly apply the charging voltage to the battery 105 At this time, the power management chip 104 controls the charging switch 102 to be disconnected to shut off the charging path so as to protect the safety of the battery 105 .

Another embodiment of the present invention provides a charging device. As shown in FIG. 2 , the second voltage detection terminal of the power management chip 104 is connected to the voltage input terminal of the battery 105, and the power management chip 104 is detected by the second voltage detection terminal. After the input voltage value of the battery 105 is reached, the power management chip 104 controls the connection or disconnection between the voltage input terminal of the charging switch 102 and the voltage output terminal of the charging switch 102 through the control terminal of the charging switch 102 according to the input voltage value of the battery 105 .

Optionally, when the power management chip 104 detects that the voltage input value of the battery 105 is greater than or equal to the second preset voltage value, the power management chip 104 controls the voltage input terminal of the charging switch 102 and the charging switch through the control terminal of the charging switch 102. The voltage output terminals of 102 are connected or disconnected.

In this embodiment, specifically, during the charging process, when the power management chip 104 detects that the charging voltage of the battery 105 exceeds the predetermined maximum voltage, it is determined that the first charging chip 103 and/or the second charging chip 110 have failed, and the The battery 105 is charged with overvoltage, and at this time, the power management chip 104 controls the charging switch 102 to be disconnected to shut off the charging path so as to protect the safety of the battery 105 .

Optionally, the data output end of the charging interface 101 is connected to the data input end of the charging switch 102, the data output end of the charging switch 102 is connected to the data input end of the power management chip, and the output end of the charging interface 101 includes a voltage output end, a second One data output terminal and the second data output terminal, the first data output terminal is D+ terminal, the second data output terminal is D- terminal, data is transmitted according to the voltage difference between the first data output terminal and the second data output terminal, charging interface 101 transmits data to the charging switch 102 through the first data output terminal and the second data output terminal, the data output terminal of the charging switch 102 includes the first data output terminal and the second data output terminal, and the charging switch 102 The voltage difference at the second data output terminal transmits data, the first data output terminal and the second data output terminal of the charging switch 102 are connected to the first data input terminal and the second data input terminal of the power management chip 104, when the voltage of the charging interface 101 When the output terminal is short-circuited with the first data output terminal or the second data output terminal, the charging switch 102 disconnects the connection between the data input terminal of the charging switch 102 and the data output terminal of the charging switch 102 .

In this embodiment, specifically, when using high voltage charging such as 9V or 12V for charging, it will bring some additional problems, for example, when the user is plugging and unplugging the mobile phone, a short circuit occurs between the voltage terminal and the data input terminal D- or D+ When the charging switch 102 detects that the voltage of the data input terminal D- or D+ exceeds 5V, it will be automatically disconnected. On, to stop the data transmission with the power management chip 104, so as to protect the following devices from damage.

It should be noted that, as another implementation manner, when the power management chip 104 detects a short circuit between the voltage output terminal of the charging interface 101 and the first data output terminal or the second data output terminal, the power management chip 104 controls the charging switch 102 Disconnect the data input terminal of the charging switch 102 from the data output terminal of the charging switch 102 .

Specifically, when the power management chip 104 detects that the data input terminal D- or D+ of the charging switch 102 exceeds a voltage of 5V, it will control the charging switch 102 to disconnect the data input terminal of the charging switch 102 from the data output terminal of the charging switch 102, thereby Protect the devices behind from damage.

As shown in Figure 2, the first voltage output end of the first charging chip 103 is connected to the battery 105, the second voltage output end of the first charging chip 103 is connected to the voltage input end of the system circuit 108, and the first charging chip 103 is the battery 105 and System circuits 108 are powered simultaneously. the

Optionally, the fast charging device further includes a first switching device 106, the voltage input terminal of the first switching device 106 is connected to the voltage output terminal of the battery 105, and the voltage output terminal of the first switching device 106 is connected to the voltage input terminal of the system circuit 108, The second voltage output terminal of the first charging chip 103 is connected to the voltage input terminal of the system circuit 108, and the data output terminal of the first charging chip 103 is connected to the control terminal of the first switching device 106. The first charging chip 103 is the battery 105 and the system circuit. When 108 supplies power, the first charging chip 103 controls the disconnection between the voltage input terminal of the first switching device 106 and the voltage output terminal of the first switching device 106 through the control terminal of the first switching device 103 .

In this embodiment, specifically, the first charging chip 103 supplies power to the system circuit 108 of the mobile terminal while charging the battery 105, so as to maintain the normal operation of the mobile terminal. At this time, the first charging chip 103 controls the A switching device 106 is in an off state, preventing the battery 105 from consuming power due to powering the mobile terminal while charging, and further realizing fast charging of the battery 105. Preferably, the first switching device 106 is a triode, a field effect transistor Or IGBT (Insulated Gate Bipolar Transistor).

Optionally, the fast charging device includes a second switching device 107, the voltage input end of the second switching device 107 is connected to the output end of the charging interface 101, the voltage output end of the second switching device 107 is connected to the voltage input end of the charging switch 102, and the voltage input end of the second switching device 107 is connected to the voltage input end of the charging switch 102. The second switching device 107 is used to be in an off state when the input voltage is negative.

In this embodiment, specifically, the second switching device 107 is used to realize negative voltage protection for the charging switch 102. Preferably, the second switching device 106 is a triode, field effect transistor or IGBT (insulated gate bipolar transistor) , wherein the negative voltage is a voltage less than zero, at this time, the second switching device 107 is turned off.

The specific circuit structure used in the above-mentioned embodiment is introduced in detail below, as shown in Figure 3 and Figure 4, preferably, the model of charging switch 102 is IC-MAX14654, and its pin IN_0, pin IN_1 and pin IN_2 are connected charging The voltage input terminal of interface 101, the common contact of pin IN_0, pin IN_1 and pin IN_2 is connected to the drain of field effect transistor 106 and the first terminal of capacitor C3500, the second terminal of capacitor C3500 and the first terminal of resistor R3514 Commonly connected to the ground, the second end of the resistor R3514 is connected to the gate of the field effect transistor 106, the source of the field effect transistor 106 is connected to the voltage output end of the charging interface 101, and the pin IN_3 and the pin IN_4 are connected to the first terminal of the charging interface 101. A data input terminal and a second data input terminal, pin OUT_0, pin OUT_1 and pin OUT_2 are voltage output terminals connected to the charging chip 103, pins OUT_3 and pin OUT_4 are data output terminals connected to the power management chip 104, The pin GND_2 is connected to the control terminal of the power management chip 104, and is connected to the first terminal of the resistor R3523, and the second terminal of the resistor R3523 is grounded.

Preferably, the specific model adopted by the first charging chip 103 and the second charging chip 110 is SMB1357, the pin USBIN_1 and the pin USBIN_2 are the voltage input terminals connected to the charging switch 102, and the common contact point of the pin USBIN_1 and the pin USBIN_2 is connected The first terminal of the capacitor C2111, the second terminal of the capacitor C2111 is grounded, the pin CHGOUT_1 and the pin CHGOUT_2 are connected to the first voltage output terminal of the battery 105, and the common point of the pin CHGOUT_1 and the pin CHGOUT_2 is connected to the first terminal of the capacitor C2112 , the second terminal of the capacitor C2112 is grounded, the pin SYSOK is the data output terminal, the pin SW_1 and the pin SW_2 are the second voltage output terminals connected to the battery 105, and the common point of the pin SW_1 and the pin SW_2 is connected to the first terminal of the capacitor C2106 One end, the first end of the inductor L2102 and the cathode of the voltage regulator tube D2103, the second end of the capacitor C2106 is connected to the pin BOOT, the anode of the voltage regulator tube D2103 is grounded, and the second end of the inductor L2102 is connected to the first end of the capacitor C2116 and For the battery 105, the second end of the capacitor C2116 is grounded.

Another embodiment of the present utility model also provides a mobile terminal, including the above-mentioned charging device and a battery.

The utility model provides a mobile terminal and a charging device. The charging device includes a charging interface, a charging switch, a power management chip and at least two charging chips; since the charging device is provided with two charging chips, the output current can be Evenly distributed on the at least two charging chips, so that each charging chip does not emit a large amount of heat, avoiding the problem of the temperature rise of the mobile terminal during charging, which can improve the safety of mobile phone use and improve user experience; and , because the power management chip can control the connection or disconnection between the voltage input terminal of the charging switch and the voltage output terminal of the charging switch, so that the electrical connection between the charging chip and the charging interface can be disconnected when necessary, and the mobile phone can be further improved. Safety of use.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, those who make several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and have the same performance or use, should be deemed to belong to the utility model submitted by the The scope of patent protection determined by the claims.

Claims (10)

1. a charging device, is characterized in that, described charging device comprises charging inlet, charge switch, power management chip and at least two charging chips;

The voltage input end of described charging inlet connects external power source, the voltage output end of described charging inlet connects the voltage input end of described charge switch, the voltage output end of described charge switch connects the voltage input end of charging chip described in each, first voltage output end of charging chip described in each connects battery, and the output of described power management chip connects the control end of described charge switch;

Described power management chip controls by the control end of described charge switch to be connected between the voltage input end of described charge switch and the voltage output end of described charge switch or to disconnect.

2. charging device as claimed in claim 1, it is characterized in that, the first voltage detecting end of described power management chip connects the voltage output end of described charge switch;

Described power management chip is after detecting by described first voltage detecting end the magnitude of voltage that described charge switch exports, according to the magnitude of voltage that described charge switch exports, controlled by the control end of described charge switch to be connected between the voltage input end of described charge switch and the voltage output end of described charge switch or to disconnect.

3. charging device as claimed in claim 2, it is characterized in that, described power management chip is when the magnitude of voltage detecting that described charge switch exports is less than or equal to the first preset voltage value, and described power management chip controls the separated of the voltage input end of described charge switch and the voltage output end of described charge switch by the control end of described charge switch.

4. charging device as claimed any one in claims 1 to 3, it is characterized in that, the second voltage detecting end of described power management chip connects the voltage input end of described battery;

Described power management chip is after the input voltage value of described battery being detected by described second voltage detecting end, described power management chip, according to the input voltage value of described battery, controls by the control end of described charge switch to be connected between the voltage input end of described charge switch and the voltage output end of described charge switch or to disconnect.

5. charging device as claimed in claim 4, it is characterized in that, described power management chip is when detecting that the input voltage value of described battery is more than or equal to the second preset voltage value, and described power management chip controls the separated of the voltage input end of described charge switch and the voltage output end of described charge switch by the control end of described charge switch.

6. charging device as claimed in claim 1, it is characterized in that, the data output end of described charging inlet is connected with the data input pin of described charge switch, and the data output end of described charge switch is connected with the data input pin of described power management chip;

When the voltage output end of described charging inlet and the data output end of described charging inlet are short-circuited, described charge switch disconnects the connection of the data input pin of described charge switch and the data output end of described charge switch, or described power management chip controls the connection that described charge switch disconnects the data input pin of described charge switch and the data output end of described charge switch.

7. charging device as claimed in claim 1, it is characterized in that, described at least two charging chips comprise the first charging chip, the voltage input end of the second voltage output end connected system circuit of described first charging chip, and described first charging chip is that described battery and described circuit system are powered.

8. charging device as claimed in claim 7, it is characterized in that, described charging device also comprises the first switching device, the voltage input end of described first switching device connects the voltage output end of described battery, the voltage input end of the voltage output end connected system circuit of described first switching device, the data output end of described first charging chip connects the control end of described first switching device;

Described first charging chip be described battery and described circuit system power time, described first charging chip controls the separated of the voltage input end of described first switching device and the voltage output end of described first switching device by the control end of described first switching device.

9. charging device as claimed in claim 1, it is characterized in that, described charging device also comprises second switch device, the voltage input end of described second switch device connects the voltage output end of described charging inlet, the voltage output end of described second switch device connects the voltage input end of described charge switch, and described second switch device is in off state when input voltage is negative pressure.

10. a mobile terminal, is characterized in that, comprises charging device described in any one and battery in claim 1 to 9.