CN215071673U - Charging cable circuit - Google Patents
Charging cable circuit Download PDFInfo
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- CN215071673U CN215071673U CN202120184702.5U CN202120184702U CN215071673U CN 215071673 U CN215071673 U CN 215071673U CN 202120184702 U CN202120184702 U CN 202120184702U CN 215071673 U CN215071673 U CN 215071673U
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Abstract
The utility model discloses a charging cable circuit, which comprises a USB-A interface and a Lightning interface connected with the USB-A interface, the Lightning interface comprises an overvoltage protection circuit, the overvoltage protection circuit comprises a first voltage stabilizing diode and a control unit, the second pin of the control unit is connected with the power pin of the USB-A interface through a first resistor, one end of the first voltage stabilizing diode is grounded, the other end of the first voltage stabilizing diode is connected with a power pin of the USB-A interface through a second resistor, the first pin of the control unit is connected with the sixth pin through a capacitor, one end of the third resistor is connected with the third pin of the control unit, the other end of the third resistor is connected with the fourth pin of the control unit, the fourth pin of the control unit is connected with a power pin of the Lightning interface, and the fifth pin of the control unit is connected with two signal pins of the Lightning interface. The utility model provides a charging cable circuit, when charging voltage too high leads to zener diode to damage, still can continue to charge to apple electronic equipment.
Description
Technical Field
The utility model relates to an electronic circuit technical field, concretely says so and relates to charging cable circuit.
Background
One end of a charging cable of an existing apple electronic device is a USB interface, the other end of the charging cable is a Lightning interface (a charging connector made by apple Inc. in America), the USB interface is connected with a charger during charging, and the Lightning interface is connected with the apple electronic device.
Because be equipped with zener diode in the charging cable of Lightning interface, when the voltage through the Lightning interface was too high, zener diode can burn out, though do not cause harm to apple electronic equipment, no current flow through in the control chip of Lightning interface this moment, this charging cable can't continue to charge promptly, need change new charging cable to increase charging cable's use amount, be unfavorable for the protection of environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a charging cable circuit, when charging voltage too high leads to zener diode to damage, still can continue to charge to apple electronic equipment.
The utility model discloses a charging cable circuit and technical scheme that charging cable adopted are:
a charging cable circuit comprises a USB-A interface and a Lightning interface connected with the USB-A interface, wherein the Lightning interface comprises an overvoltage protection circuit, the overvoltage protection circuit comprises a first resistor, a second resistor, a third resistor, a capacitor, a first voltage stabilizing diode and a control unit, one end of the first resistor is connected with a power pin of the USB-A interface, the other end of the first resistor is connected with a second pin of the control unit, one end of the second resistor is connected with the power pin of the USB-A interface, the other end of the second resistor is connected with the first voltage stabilizing diode, the first voltage stabilizing diode is grounded, one end of the capacitor is connected with a first pin of the control unit, the other end of the capacitor is connected with a sixth pin of the control unit, one end of the third resistor is connected with a third pin of the control unit, the other end of the third resistor is connected with a fourth pin of the control unit, the fourth pin of the control unit is connected with the power pin of the Lightning interface, and a fifth pin of the control unit is connected with two signal pins of the Lightning interface.
As a preferable scheme, the controller further comprises a second voltage stabilizing diode, wherein one end of the second voltage stabilizing diode is connected with the fourth pin of the control unit, and the other end of the second voltage stabilizing diode is grounded.
As a preferable scheme, the controller further comprises a third voltage stabilizing diode, wherein one end of the third voltage stabilizing diode is connected with the fifth pin of the control unit, and the other end of the third voltage stabilizing diode is grounded.
Preferably, the first resistor has a resistance of 1 kilo-ohm, the second resistor has a resistance of 20 ohms, the third resistor has a resistance of 120 ohms, and the capacitor has a capacity of 100 nanofarads.
Preferably, the model of the control unit is SSC1201GSB, and the control unit is an integration of a control chip and a MOS transistor.
The utility model discloses a charging cable circuit's beneficial effect is: in the process of charging the apple electronic equipment by the Lightning interface, when the charging voltage is too high, the first voltage stabilizing diode in the protection circuit of the Lightning interface can be burnt out, because the first voltage stabilizing diode is connected with the second resistor in series and grounded, the circuit provided with the first voltage stabilizing diode is in a non-short circuit state, the current still passes through the control unit, namely, the charging cable can be continuously charged, so that the second resistor is connected with the first voltage stabilizing diode in series, and the apple electronic equipment can be continuously charged when the first voltage stabilizing diode is damaged due to the too high charging voltage.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a charging cable circuit according to the present invention.
Detailed Description
The invention will be further elucidated and described with reference to the following embodiments and drawings in which:
referring to fig. 1, a charging cable circuit includes a USB-a interface P1 and a Lightning interface J1, the Lightning interface JI is connected to the USB-a interface P1, the Lightning interface J1 includes an overvoltage protection circuit, the overvoltage protection circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a capacitor C1, a first zener diode D3 and a control unit U1, one end of the first resistor R1 is connected to the power pin of the USB-a interface P1, the other end is connected to the second pin of the control unit U1, one end of the second resistor R2 is connected to the power pin of the USB-a interface P1, the other end is connected to the first zener diode D3, the first zener diode D3 is grounded, one end of the capacitor C1 is connected to the first pin of the control unit U1, the other end is connected to the sixth pin of the control unit U1, one end of the third resistor R1 is connected to the fourth pin of the control unit U3, the fourth pin of the control unit U1 is connected to the power pin of the Lightning interface J1, and the fifth pin of the control unit U1 is connected to the two signal pins of the Lightning interface J1.
By providing the first zener diode D3, static electricity from the USB-a interface P1 to the control unit U1 is protected. In the process that the charging cable provided with the charging cable circuit charges the apple electronic equipment, when the charging voltage is too high, the first zener diode D3 in the protection circuit of the Lightning interface J1 is burnt out, and because the first zener diode D3 is connected in series with the second resistor R2 in parallel, and then the line provided with the first zener diode D3 is in a non-short-circuit state, the current still passes through the control unit U1, that is, the charging cable can continue to charge, so that the second resistor R2 is connected in series with the first zener diode D3, when the charging voltage is too high, the first zener diode D3 is damaged, the apple electronic equipment can still be continuously charged, and the overvoltage protection of the charged apple electronic equipment is realized at the same time.
The controller further comprises a second voltage stabilizing diode D1, wherein one end of the second voltage stabilizing diode D1 is connected with the fourth pin of the control unit U1, and the other end of the second voltage stabilizing diode D1 is grounded. By providing the second zener diode D1, static electricity from the power pin of the Lightning interface to the control unit U1 is protected.
The voltage regulator further comprises a third voltage regulator diode D2, wherein one end of the third voltage regulator diode D2 is connected with the fifth pin of the control unit U1, and the other end of the third voltage regulator diode D2 is grounded. By providing the third zener diode D2, static electricity from the two signal pins of the Lightning interface to the control unit U1 is protected.
When the resistance of the first resistor R1 is 1 kilo-ohm, the resistance of the second resistor R2 is 20 ohms, the resistance of the third resistor R3 is 120 ohms, and the capacitance of the capacitor C1 is 100 nanofarads, the control unit U1 can be better protected, and when the first zener diode D3 burns out, the voltage on the control unit U1 is better kept stable.
The model of the control unit U1 is SSC1201GSB, and the control unit is an integration of a control chip and a MOS transistor.
In summary, by providing the overvoltage protection circuit including the first resistor R1, the second resistor R2, the third resistor R3, the capacitor C1, the first zener diode D3 and the control unit U1, the first zener diode D3 is connected in series with the second resistor R2 and then connected to the power pin of the USB-a interface P1, when the charging voltage is too high, although the first zener diode D3 burns out, the line provided with the first zener diode D3 is not short-circuited, and current still flows through the control unit U1, so that when the charging voltage is too high and the first zener diode D3 is damaged, the lighting interface J1 can continue to charge the apple electronic device, and by providing the second zener diode D1 and the third zener diode D2, static electricity from the two signal pins of the lighting interface J1 to the control unit U1 is protected.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A charging cable circuit is characterized by comprising a USB-A interface and a Lightning interface connected with the USB-A interface, wherein the Lightning interface comprises an overvoltage protection circuit, the overvoltage protection circuit comprises a first resistor, a second resistor, a third resistor, a capacitor, a first voltage stabilizing diode and a control unit, one end of the first resistor is connected with a power pin of the USB-A interface, the other end of the first resistor is connected with a second pin of the control unit, one end of the second resistor is connected with the power pin of the USB-A interface, the other end of the second resistor is connected with the first voltage stabilizing diode, the first voltage stabilizing diode is grounded, one end of the capacitor is connected with a first pin of the control unit, the other end of the capacitor is connected with a sixth pin of the control unit, one end of the third resistor is connected with the third pin of the control unit, and the other end of the third resistor is connected with a fourth pin of the control unit, the fourth pin of the control unit is connected with a power pin of the Lightning interface, and the fifth pin of the control unit is connected with two signal pins of the Lightning interface.
2. The charging cable circuit of claim 1, further comprising a second zener diode having one end connected to the fourth pin of the control unit and the other end connected to ground.
3. The charging cable circuit of claim 1, further comprising a third zener diode, one end of the third zener diode being connected to the fifth pin of the control unit and the other end of the third zener diode being connected to ground.
4. The charge cord circuit of claim 1, wherein said first resistor has a resistance of 1 kilo-ohm, said second resistor has a resistance of 20 ohms, said third resistor has a resistance of 120 ohms, and said capacitor has a capacitance of 100 nanofarads.
5. The charging cable circuit of claim 1, wherein the control unit is model SSC1201GSB, the control unit being an integration of a control chip and a MOS transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120184702.5U CN215071673U (en) | 2021-01-23 | 2021-01-23 | Charging cable circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120184702.5U CN215071673U (en) | 2021-01-23 | 2021-01-23 | Charging cable circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215071673U true CN215071673U (en) | 2021-12-07 |
Family
ID=79252302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120184702.5U Active CN215071673U (en) | 2021-01-23 | 2021-01-23 | Charging cable circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215071673U (en) |
-
2021
- 2021-01-23 CN CN202120184702.5U patent/CN215071673U/en active Active
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