KR100541251B1 - Power Supply Source Automatic Cognition and Charging Type Data Communication Cable - Google Patents

Abstract

The present invention relates to a data communication cable for various terminals such as a mobile phone, and more particularly, to minimize the overload and charging malfunction by controlling the charging current according to the power supply to automatically recognize the power supply connected to the chargeable data cable The present invention relates to a charging type data communication cable that automatically recognizes a power supply to perform a stable charging function.

To this end, the present invention exchanges data between the terminal and the PC, and receives the charging current and outputs the data port and USB port for charging the battery of the terminal and the charging current received from the personal computer or power supply to the data port and And a cable for transferring the terminal data received from the data port to the USB port and a charging circuit unit for automatically recognizing the power supply source connected to the USB port to adjust the charging current.

With the above configuration, the power supply automatic recognition of the power supply type data communication cable according to the present invention, by automatically recognizing the power supply source connected to the charging type data cable to adjust the charging current according to the power used to overload and charging malfunction Minimize the effect of performing a stable charging function.

Description

Power Supply Source Automatic Cognition and Charging Type Data Communication Cable

1 is an external view showing a power supply automatic recognition charging type data communication cable according to the present invention.

Figure 2 is a block diagram showing the overall configuration of a power supply automatic recognition charging type data communication cable according to the present invention.

3 is an overall circuit diagram illustrating a specific configuration of a power supply automatic recognition charging type data communication cable according to the present invention.

Explanation of symbols on the main parts of the drawings

101: data port 102: cable

103: USB port 104: Mobile phone input / output port

105: USB port on the PC 106: USB port on the power supply

107: charging circuit section

The present invention relates to a data communication cable, such as a mobile communication device, more specifically, to automatically recognize the power supply connected to the chargeable data cable to adjust the charging current according to the power used to overload and charging malfunction The present invention relates to a charging type data communication cable that automatically recognizes a power supply to minimize a stable charging function.

In general, communication ports mainly used for data transmission include Universal Serial Bus (USB) and Universal Asynchronous Receiver Transmitter (UART). As a peripheral device interface specification jointly proposed by the company, it is used for the purpose of the commonization of an interface for connecting various peripheral devices to a personal computer.

This USB port can connect most peripheral devices to the personal computer without any software or hardware setup, so the number of ports can be dramatically reduced, and the installation is simple and the size of the portable computer can be reduced. There is an advantage to being possible.

In addition, as described above, the USB port supplies power required for driving peripheral devices, so that 5V and 500mA power is supplied as a USB standard so that a peripheral device can be operated without a separate power source.

With the development of mobile communication devices, these devices are not only used as a single device, but also are increasingly used in conjunction with peripheral devices such as PCs. As a necessary means of communication, the USB method is used and the power provided by the USB communication method is used. USB charging cables are being used to charge the batteries of these devices with communication.

However, when the USB communication cable is used to charge the PC and the terminal simultaneously with the USB communication, the low battery with a battery capacity of 500 mA or less can be charged, but the battery with a higher capacity is insufficient in current capacity. There is a problem that becomes difficult.

In addition, when using a current of 500mA or more in the USB port, there is a problem that the USB port is overloaded and the communication is cut off during communication and the PC is stopped (error) or rebooting. Therefore, it is inconvenient to prepare a separate charger and a cable for separate charging in order to charge a large capacity battery.

In order to solve this problem, an object of the present invention is to automatically recognize the power supply connected to the rechargeable data cable in order to overcome the limitation of the charging capacity of the USB rechargeable cable, even though the capacity of the battery is changed. In addition, an object of the present invention is to provide an automatic power supply charging type data communication cable capable of performing a stable charging function while preventing overload and charging malfunction.

In order to achieve the above object, the present invention provides a data port for exchanging data with a terminal, supplying a charging current to the terminal, transferring data to the terminal and an external personal computer, and receiving charging power from the personal computer, or receiving external power. USB port receiving the charging power from the supply, and converts the charging power input from the personal computer or the power supply into a charging current to output to the data port, and transfers the terminal data exchanged in the data port to the USB port A power supply automatic recognition charging type data communication cable comprising a cable and a charging circuit unit for automatically recognizing a power supply connected to the USB port and also automatically converting and controlling a charging current is proposed.

Accordingly, the present invention, as well as the smooth data exchange between the USB port and the data port, and automatically recognizes the power supplied through the USB port in the charging circuit unit to output the optimum charging current to the data port to enable the stable charging effect There is.

Hereinafter, a preferred embodiment of a power supply automatic recognition charging type data communication cable according to the present invention will be described in detail with reference to the accompanying drawings. 1 is an external view showing a power supply automatic recognition charging type data communication cable according to the present invention, in which the cable 102 and the charging circuit unit 107 are connected between the data port 101 and the USB port 103. It is.

In this case, the data port 101 receives or receives data from the mobile phone terminal through the input / output port 104 and supplies a charging current to the terminal, wherein the terminal input / output port 104 and the data port 101 As an example of the connection means, a standard 24-pin connector certified by the Telecommunications Technology Association (TTA) may be used.

In addition, the USB port 103 transfers the data of the terminal input through the data port 101 to an external USB port 105 built in a personal computer (not shown) and receives charging power from the personal computer. , And functions to receive charging power from an external power supply 106 commonly referred to as an adapter.

The present invention is also configured to include a cable 102 for transmitting data and power by connecting the data port 101 and the USB port 103 as described above, the data port connected to the mobile phone input and output port 104 ( Data transmitted from the terminal via the cable 102 to the external USB port 105 of the personal computer connected to the USB port 103 via the cable 102 or by receiving charging power from the external USB port 105 of the personal computer. It serves to supply the charging current through the port 101 to the terminal.

In addition, the charging circuit unit 107 is connected to the data port 101 is connected to the external power supply 106 through the USB port 103 for normal charging and automatically recognizes this when supplying the charging current to the terminal It converts and adjusts the charging current according to the power and battery capacity to be used to minimize overload and malfunction of charging, enabling stable charging.

2 is a block diagram of a power supply automatic recognition charging type data communication cable according to the present invention.

As can be seen from this, the power line of the present invention (USB Power) is connected to the external USB port 105 of the personal computer and the USB port 103 of the present invention receives a DC + 5V Pi (π) The ripple and noise are reduced by passing through the type filter circuit to supply a stable constant voltage power supply to the terminal connected to the data port 101.

Accordingly, a smooth and stable constant voltage is supplied to the terminal through the data port 101. For example, when DC + 5V is applied to the terminal through pin 16 of a standard 24-pin connector, the terminal is connected to a USB data cable. It is recognized as a USB communication mode, and connects a personal computer and a mobile phone through a noise filter of USB data lines (USB Data +, USB Data-) to enable data exchange. As such, when the standard 24-pin connector is connected to the mobile phone terminal, as shown in the detailed circuit diagram of FIG. 3, the ID voltage value of the battery is connected to the non-inverting input terminal of the comparator U1A through the battery's ID resistance terminal BAT_ID. It is input, which is compared with the reference voltage value of the inverting input terminal. Accordingly, since the voltage value of the non-inverting input terminal is lowered to the low level when the battery is connected, the voltage value of the inverting input terminal becomes smaller than the voltage value of the inverting input terminal, so that the output of the comparator U1A is inverted from the high level state to the low level state. A low level signal is applied to the B terminal of the transistor array Q1 connected to the output to turn off one side transistor of the transistor array Q1. As a result, the VCC voltage is applied to the EN-NTC of the charger integrated circuit (Charger IC (U2)). It is applied to the terminal to start operation.

In addition, a battery ID resistor is applied to the inverting terminals of the comparators U1B and U1D. Accordingly, different voltages are applied to the inverting terminal according to the ID resistance value of the battery, which will be described in more detail as follows.

In the present invention, for example, three battery ID resistors are set according to the capacity, as illustrated in Table 1, corresponding to the capacity of the battery.

BAT_ID resistance Setting current 27KΩ 450 mA ± 50 mA 4.5KΩ 750 mA ± 50 mA 1.5KΩ 900 mA ± 50 mA

<Table 1> Current tolerance value according to BAT_ID

The resistance value detection of the ID resistor terminal BAT_ID is detected by a voltage value applied according to the ID resistance value by connecting the reference voltage to the input terminals of the comparators U1B and U1D. Therefore, for example, when the current ID resistance terminal BAT_ID resistance value is 27 kΩ, since the resistance value is high, the value of the inverting input terminal becomes high level, and as a result, the outputs of the comparator U1B and the comparator U1D are reduced. Since the transistor array Q2 is turned off because all of them are in a low level state, resistors R12 and R15 are connected in parallel between the IPRBM terminal of the charger integrated circuit U2 and ground, and the resistors R13 and R14 are connected in series. In connection, the highest resistance value is applied between the IPRBM terminal of the charger integrated circuit U2 and the ground. Therefore, the charger integrated circuit U2 outputs a constant voltage of 4.2 V / 450 mA, which is a preset output corresponding to this state.

Therefore, a small battery can be charged normally without any difficulty. In addition, if the ID resistance terminal (BAT_ID) resistance value is 4.5 kΩ, the input voltage values of the comparators U1B and U1D are lower than before, so that the output of the comparator U1B is at a high level so that the B side of the transistor array Q2 is attained. By turning on the transistor, the resistors R12 and R15 and the resistor R13 connected in parallel are connected between the IPRBM terminal of the charger integrated circuit U2 and the ground. Accordingly, the charger integrated circuit 2 outputs a constant voltage of 4.2 V / 750 mA, which is a preset output value. If the resistance of the ID resistor terminal BAT_ID is 1.5 kΩ, both the output of the comparator U1B and the inverting input terminal voltage of the comparator U1D are at a low level. Since both transistors A and B are turned on, parallel resistors R12 and R15 are equivalently connected between the IPRBM terminal of the charger integrated circuit U2 and the ground, and therefore, the charger integrated circuit U2 is 4.2. Outputs a constant voltage of V / 900mA.

In addition, in the present invention, as described above, the non-inverting terminal voltage of the comparator U1A is lowered by the ID resistance of the battery, and the B-side transistor of the transistor array Q1 is turned off, so that the EN-NTC of the charger integrated circuit U2 is turned off. When a high level voltage is applied to the terminal, the charger integrated circuit U2 outputs a high level signal to the CHRGB terminal for the convenience of the user. Accordingly, the green LED L1 is turned off and the transistor array Q1 is applied. Transistor is turned on and the red LED L2 is turned on. In this series of operations, the green LED (L1) is turned on during charging standby, and when the terminal is connected to the standard 24 pin connector, the ID resistor of the battery is connected. As described above, the red LED (L2) is turned on to charge the battery. Indicates that The charging proceeds in this state, and when it is finished, the charger integrated circuit U2 controlling the charging lowers the output of the CHRGB terminal back to the low level, thereby lighting the green LED L1 again to indicate the end of charging.

In addition, in the present invention, since the external USB port 105 of the personal computer pin 5 is shielded to the main body to block ambient noise in the data communication process, the detection circuit is used as a comparator (U1C) and a resistor. Configured. That is, as shown, by applying a reference voltage to the non-inverting input terminal of the comparator (U1C) and changing the voltage according to the connection state of the USB port 103 to the inverting input terminal by controlling the output level of the comparator (U1C) The current is controlled by controlling the transistor array Q3.

That is, when the external USB port 105 of the personal computer is connected to the USB port 103, No. 4 and 5 of the USB port 103 is connected to the shield, the resistor (R18) is grounded through the shield, Vcc The voltage is divided by the resistors R5 and R18, and the voltage value distributed to the resistor R18 is input to the inverting input terminal of the comparator U1C. In the non-inverting input terminal of the comparator U1C, the voltage Vcc is distributed to the resistors R19 and R20 and the voltage value distributed to the resistor R20 is applied.

At this time, the voltage value distributed to the resistor R20 is directly applied after passing through the resistor R19, which is connected higher than the voltage of the resistor R18, while one end of the resistor R5 is connected by the resistor R18. Since it is grounded, the voltage of the non-inverting input terminal of the comparator U1C becomes higher than the voltage of the inverting input terminal, and the output thereof becomes a high level. Accordingly, both transistors of the transistor array Q3 are turned on so that the comparator ( Force the output of U1B, U1D) to the low level, which is the ground level.

Accordingly, since all transistors of the transistor array Q2 are turned off regardless of the battery ID, as described above, resistors R12, R13, and R14 connected in series and parallel between the IPRBM terminal of the charger integrated circuit U2 and ground. , R15 are all connected, and the charger integrated circuit U2 outputs a constant voltage of 4.2V / 450mA as set in this state, thereby enabling stable charging in a small capacity battery charging state. Therefore, as well as being able to charge a small capacity battery using the power of the PC, even in the case of a large capacity battery will be able to perform a smooth data communication in a stable state while charging normally at a slightly slower speed.

On the contrary, when an external power supply such as an adapter is connected to supply power, the USB port 106 of the power supply is not shielded, and 4 and 5 of the USB port 103 are disconnected.

Accordingly, the voltage of one end of the resistor R5 connected to the inverting input terminal of the comparator U1C is separated from the ground by the resistor R18, and the voltage of the resistor R18 is grounded by the resistor R18. It is applied to the inverting input terminal of U1C so that the output of the comparator U1C becomes a low level state.

Accordingly, both transistors of the transistor array Q3 connected thereto are not driven but are turned off.

At this time, as described above, the transistors of the transistor array Q2 are selectively or simultaneously operated as described above according to the output states of the comparators U1B and D according to the battery ID resistance values, thereby allowing the IPRBM of the charger circuit U2 to operate. As the resistance value (R12, R13, R14, R15) connected between the terminal and the ground is changed as described above, the constant current set is supplied, so that the battery can be stably and quickly even when the capacity of the battery is large by an external power supply. Sufficient optimal charging current is output for charging.

Accordingly, the present invention uses a separate external power supply (output having a USB adapter type) that can supply a sufficient sufficient charging current when charging a large capacity of the battery, and connected to a PC when data communication and charging are required. In this case, the power supply is automatically recognized in both cases, and when the external power supply is connected, sufficient current is supplied corresponding to the charging current capacity required by the battery to enable fast and stable charging. When connected to a PC, both data communication and charging functions can be reliably supplied by supplying a constant current so as not to interfere with data communication.

Accordingly, in the present invention, when the power supply is a PC, charging is performed at a low current (450 mA ± 50 mA) regardless of the ID resistance value (27 KΩ, 4.5 KΩ, 1.5 KΩ: according to the TTA standard) according to the battery capacity. In case of supply, it recognizes the battery ID resistance value and charges with the charging current (450mA, 750mA, 900mA ± 50mA) suitable for the battery capacity.

Therefore, during the USB communication between the PC and the terminal, the battery of the terminal is charged with the optimal current to prevent the communication from being interrupted during data transmission and reception and the PC down (error) or rebooting. In use, it charges with the charging current value by the battery ID resistance value, and rapid charging is possible.

In this way, the present invention automatically recognizes the power supply connected to the rechargeable data cable and adjusts the charging current according to the power used to enable stable data communication and stable charging in the case of a PC connection. In this case, it is possible to quickly charge, there is a useful effect that can be used conveniently.

Claims (2)

In the cable connected to the mobile phone to supply data communication and power, A data port for receiving or receiving data input from the terminal and supplying a charging current to the terminal; A USB port for transferring the terminal data to an external personal computer and receiving charging power from the personal computer or receiving charging power from an external power supply; A cable for converting the charging power supplied from the personal computer or an external power supply into a charging current and outputting the charging current to the data port, and transferring the terminal data exchanged from the data port to the USB port; And a charging circuit unit for automatically recognizing a power supply source connected to the USB port and adjusting a charging current. The method of claim 1, wherein the charging circuit unit, A power supply unit and a USB data line circuit connected to the data port; A current controller circuit; A personal computer and a USB detector circuit; Charging type data communication cable for automatically recognizing a power source, characterized in that the charging current is adjusted by automatically recognizing a power supply connected from the outside.

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