A charging control chip, a charging control circuit and a charging data line

Abstract

The application discloses a charging control chip, a charging control circuit and a charging data line, and belongs to the field of charging data lines. The main problem that the existing C91 charging data line is prone to burning and the connecting head cannot be miniaturized is solved. The charging overvoltage detection unit and the load short-circuit detection unit are integrated in the control chip of the charging data line, overvoltage charging and load short-circuit phenomena are identified, and the charging circuit is controlled to be disconnected when the phenomena occur, and the circuit elements are greatly reduced, so that the connecting head of the charging data line can be miniaturized.

Description

Technical Field

[0001] This invention relates to the field of charging data cables, and more specifically to a charging control chip, a charging control circuit using the charging control chip, and a charging data cable using the charging control circuit. Background Technology

[0002] iPhones are widely popular and distributed globally. However, the C91 charging cable, widely used in iPhones, has the following technical problems: 1. The charging control chip or the cable itself is prone to burning out; 2. [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Figure 1 As shown, the circuit of this charging data cable has as many as 13 components, and the large number of circuit components affects the miniaturization of the connector. Summary of the Invention

[0003] The primary objective of this invention is to provide a charging control chip that at least partially addresses the aforementioned technical problems existing in related technologies.

[0004] A second objective of the present invention is to provide a charging control circuit that at least partially solves the aforementioned technical problems existing in related technologies.

[0005] A third objective of this invention is to provide a charging data cable that at least partially solves the aforementioned technical problems existing in related technologies.

[0006] To achieve the aforementioned first objective, the provided charging control chip includes:

[0007] VCC pin;

[0008] Foot;

[0009] The DIO pin is used to connect to the iPhone DATA pin of the Lightning connector and communicate with the phone.

[0010] The POUT pin is used to drive the external MOSFET;

[0011] ROUT pin used for connecting to the iPhone POWER pin of the Lightning connector;

[0012] The logic control unit (5) is connected to the POUT pin;

[0013] A communication signal processing unit (7) connected between the logic control unit (5) and the DIO pin;

[0014] A charging overvoltage detection unit (9) and a load short circuit detection unit (8) are connected between the logic control unit (5) and the ROUT pin;

[0015] A power supply unit (3) is connected between the logic control unit (5) and the VCC pin;

[0016] A low-voltage reset detection unit (4) connected between the power supply unit (3) and the logic control unit (5) for triggering a reset of the logic control unit (5) when the voltage is lower than a preset value; and

[0017] An oscillation unit (6) provides a clock signal to the logic control unit (5).

[0018] Preferably, the charging control chip further includes: a resistor (1) connected between the ROUT pin and the VCC pin; and a switching transistor (2) connected in series with the resistor (1) and connected to the logic control unit (5) for disconnecting the power supply from the ROUT pin in the non-charging state.

[0019] Preferably, the charging control chip further includes a VDD pin connected to the power supply unit (3) for outputting a stable voltage.

[0020] Preferably, the charging control chip uses a 25V process and has a withstand voltage of up to 39V.

[0021] To achieve the second objective mentioned above, the present invention provides a charging control circuit comprising: a MOSFET (Q1), a surge protection diode (D1), a rectifier diode (D2), a filter capacitor (C1), and a chip as described above.

[0022] The MOSFET (Q1) is connected between the VCC terminal and the iPhone POWER pin of the Lighting connector. The surge protection diode (D1) is connected between the iPhone POWER pin of the Lighting connector and the ground terminal. The rectifier diode (D2) is connected between the LIN D- pin of the Lighting connector and the VDD pin of the chip. The filter capacitor (C1) is connected between the VDD pin and the ground pin of the chip (U1). The VCC pin, ground pin, POUT pin, ROUT pin, and DIO pin of the chip (U1) are connected to the VCC terminal, ground terminal, the gate of the MOSFET (Q1), the iPhone POWER pin of the Lighting connector, and the iPhone DATA pin of the Lighting connector, respectively.

[0023] In the above-mentioned charging control circuit, preferably, the chip adopts a 25V process and has a withstand voltage of up to 39V.

[0024] To achieve the third objective mentioned above, the present invention provides a charging data cable including a Lightning connector (30), a USB connector (10), and a charging control circuit (20), wherein the charging control circuit (20) is the charging control circuit mentioned above, and the VCC terminal and ground terminal of the charging control circuit (20) are respectively connected to the power pin and ground pin of the USB connector (10).

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] This invention integrates a charging overvoltage detection unit and a load short circuit detection unit into the chip of the data cable. It can identify charging overvoltage and load short circuit phenomena and disconnect the charging circuit after identification, thereby effectively reducing the risk of chip or data cable burnout.

[0027] This invention integrates the resistor in the surge protection circuit into the chip inside the data line, which can disconnect the surge protection circuit when the power supply is not charging, preventing damage to the surge protection diode at the back end from power surges when the power supply is not charging.

[0028] The charging control circuit of this invention has fewer components, which is beneficial for miniaturizing the connector of the charging data cable.

[0029] The charging control chip of this invention adopts a 25V process, and its withstand voltage value is much higher than that of existing charging control chips, which can further reduce chip burnout caused by overvoltage. Attached Figure Description

[0030] Figure 1 Circuit diagram for an existing C91 charging data cable;

[0031] Figure 2 A circuit block diagram of one embodiment of a charging control chip;

[0032] Figure 3 A circuit diagram of one embodiment of a charging control circuit;

[0033] Figure 4 This is a schematic diagram of one embodiment of a charging data cable. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Please refer to Figure 2This charging control chip includes: a VCC pin, a ground pin, a DIO pin for connecting to the iPhone DATA pin of the Lightning connector and communicating with the mobile phone, a POUT pin for driving the peripheral MOSFET, a ROUT pin for connecting to the iPhone POWER pin of the Lightning connector, a logic control unit 5 connected to the POUT pin, a communication signal processing unit 7 connected between the logic control unit 5 and the DIO pin, a charging overvoltage detection unit 9 and a load short circuit detection unit 8 connected between the logic control unit 5 and the ROUT pin, a power supply unit 3 connected between the logic control unit 5 and the VCC pin, a low voltage reset detection unit 4 connected between the power supply unit 3 and the logic control unit 5 for triggering the logic control unit 5 to reset when the voltage is lower than a preset value, and an oscillation unit 6 that provides a clock signal to the logic control unit 5.

[0036] The charging control chip further includes: a resistor 1 connected between the ROUT pin and the VCC pin; and a switching transistor 2 connected in series with the resistor 1 and connected to the logic control unit 5, for disconnecting the power supply from the ROUT pin in the non-charging state.

[0037] The charging control chip further includes a VDD pin connected to the power supply unit 3 for outputting a stable voltage.

[0038] The charging control chip preferably uses a 25V process and its withstand voltage can reach 39V.

[0039] Figure 3 The diagram shows a charging control circuit constructed using the aforementioned charging control chip. For example... Figure 3 As shown, the charging control circuit includes: MOSFET Q1, surge protection diode D1, rectifier diode D2, filter capacitor C1, and chip U1.

[0040] Figure 3 JP1 in the diagram refers to the connector on the circuit board used to connect the Lightning connector. JP1 and... Figure 1 The technology in this application is the same as that in the prior art. JP1 has a total of 8 pins, which correspond to the 8 gold fingers on the front and 8 gold fingers on the back of the Lighting connector. Therefore, in this application, each pin of JP1 is regarded as a pin of the Lighting connector.

[0041] Figure 3 The chip U1 in the middle uses Figure 2 The charging control chip shown has a VCC pin, a DIO pin, a POUT pin, a ROUT pin, a VDD pin, and a ground pin.

[0042] like Figure 3As shown, the MOSFET Q1 is connected between the VCC terminal and the iPhone POWER pin of the Lighting connector; the surge protection diode D1 is connected between the iPhone POWER pin of the Lighting connector and the ground terminal; the rectifier diode D2 is connected between the LIN D- pin of the Lighting connector and the VDD pin of the chip U1; the filter capacitor C1 is connected between the VDD pin and the ground pin of the chip U1; and the VCC pin, ground pin, POUT pin, ROUT pin, and DIO pin of the chip U1 are connected to the VCC terminal, the ground terminal, the gate of the MOSFET Q1, the iPhone POWER pin of the Lighting connector, and the iPhone DATA pin of the Lighting connector, respectively.

[0043] Chip U1 communicates with the mobile phone through the DIO pin and controls the state of MOSFET Q1 through the POUT pin, thereby controlling the VCC terminal to charge or stop charging the mobile phone through MOSFET Q1.

[0044] The charging overvoltage detection unit 9 and the load short circuit detection unit 8 in chip U1 detect the electrical parameters of the ROUT pin and feed them back to the logic control unit 5. When the voltage exceeds the standard or the load is short-circuited, the logic control unit 5 controls the MOSFET Q1 to turn off, disconnecting the mobile phone from the VCC terminal (i.e., the charger). Therefore, it can prevent charging from continuing when overvoltage or load short circuit occurs, thereby preventing chip U1, MOSFET Q1, or data line from being burned out.

[0045] In charging mode, the logic control unit 5 in chip U1 turns on switch 2, and resistor R1 and surge protection diode D1 form a surge protection circuit. When a surge occurs at the VCC terminal, the surge current is absorbed through resistor R1, switch 2, and surge protection diode D1, protecting chip U1, MOSFET Q1, and the mobile phone. In non-charging mode, the logic control unit 5 in chip U1 turns off switch 2. Thus, when a surge occurs at the VCC terminal, it will not be conducted to the surge protection diode D1, protecting it from damage. Since MOSFET Q1 is also in the off state at this time, the surge current will not affect the mobile phone connected to the Lightning connector.

[0046] When the VCC terminal voltage is too low, the low voltage reset detection unit 4 triggers the logic control unit 5 to reset, ensuring the normal operation of the charging control system.

[0047] contrast Figure 1 and Figure 3As can be seen, the charging control circuit of this embodiment includes a total of 7 components: MOSFET Q1, surge protection diode D1, rectifier diode D2, filter capacitor C1, chip U1, resistor R1, and connector JP1. In contrast, existing technologies use as many as 13 components. Therefore, using the charging control circuit of this embodiment can effectively reduce the size of the circuit board and the number of charging data cable connectors.

[0048] Figure 4 The image shows a charging data cable. The charging data cable includes a Lightning connector 30, a USB connector 10, and a charging control circuit 20. The charging control circuit 20 is installed inside the Lightning connector 30 and employs... Figure 3 The circuit shown has the VCC terminal and the ground terminal in the charging control circuit connected to the power pin and ground pin of the USB connector 10, respectively.

[0049] In addition, the D+ and D- pins of the Lightning connector 30 are directly connected to the D+ and D- pins of the USB connector 10 via wires to achieve data transmission. The LIP D+ pin of the Lightning connector 30 is connected to a pull-down resistor to the gold finger shell of the Lightning connector 30. These are all the same as in the prior art.

[0050] The present invention has been described in detail above through specific embodiments. These detailed descriptions are only intended to help those skilled in the art understand the content of the present invention and should not be construed as limiting the scope of protection of the present invention. Various modifications and equivalent transformations made by those skilled in the art to the above solutions under the concept of the present invention should be included within the scope of protection of the present invention.

Claims

1. A charge control circuit, characterized by comprising: MOS transistor (Q 1), surge protection diode (D 1), rectifier diode (D2), filter capacitor (C1), charge control chip (U1), and connector (JP 1) are composed of, The charge control chip (U1) comprises: VCC pin; Ground pin; DIO pin; POUT pin; ROUT pin; VDD pin; The logic control unit (5) connected with the POUT pin; The communication signal processing unit (7) connected between the logic control unit (5) and the DIO pin; The charging overvoltage detection unit (9) and the load short circuit detection unit (8) connected between the logic control unit (5) and the ROUT pin; The power supply unit (3) connected between the logic control unit (5), VDD pin and the VCC pin; The low voltage reset detection unit (4) connected between the power supply unit (3) and the logic control unit (5) for triggering the logic control unit (5) reset when the voltage is lower than the preset value; The oscillation unit (6) for providing clock signal to the logic control unit (5); The resistor (1) connected between the ROUT pin and the VCC pin; and The switch tube (2) connected in series with the resistor (1) and connected with the logic control unit (5) for disconnecting the power supply from the ROUT pin in the uncharged state; The connector (JP1) for connecting the Lighting connector, which comprises iphone POWER pin, iphone DATA pin and LIN D- pin; The MOS transistor (Q1) comprises D pole, S pole and G pole, wherein the D pole and the G pole are connected with the VCC pin and the POUT pin of the charge control chip (U1), and the S pole is connected with the iphone POWER pin of the connector (JP1) and the POUT pin of the charge control chip (U1); The negative pole of the surge protection diode (D1) is connected with the POUT pin of the charge control chip (U1), and the positive pole is connected with the ground end; The negative pole of the rectifier diode (D2) is connected with the VDD pin of the charge control chip (U1), and the positive pole is connected with the LIN D- pin of the connector (JP1); One end of the filter capacitor (C1) is connected with the VDD pin of the charge control chip (U1), and the other end is connected with the ground end; The VCC pin, GND pin and DIO pin of the charge control chip (U1) are connected with the VCC end, ground end and iphone DATA pin of the connector (JP1) correspondingly.

2. The charge control circuit according to claim 1, characterized by The chip adopts 25V process, and the withstand voltage value can reach 39V.

3. A charging data line comprising a Lighting connector (30), a USB connector (10), and a charging control circuit (20), characterized in that, The charge control circuit (20) is the charge control circuit in claim 1 or 2, and the VCC end and the ground end of the charge control circuit (20) are connected with the power pin and the ground pin of the USB connector (10) correspondingly.

Images