CN212588107U - Charging circuit and charging device - Google Patents
Charging circuit and charging device Download PDFInfo
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- CN212588107U CN212588107U CN202021133852.5U CN202021133852U CN212588107U CN 212588107 U CN212588107 U CN 212588107U CN 202021133852 U CN202021133852 U CN 202021133852U CN 212588107 U CN212588107 U CN 212588107U
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- 239000003990 capacitor Substances 0.000 claims description 69
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- 235000019504 cigarettes Nutrition 0.000 description 6
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Abstract
The utility model provides a charging circuit and charging device, this charging circuit include that direct current voltage input, first quick charging circuit, second are quick charging circuit, first interface and the second interface that charges charge. The technical scheme of the utility model, can solve present on-vehicle charger and can only carry out the problem of filling soon for single electronic product.
Description
Technical Field
The utility model relates to a technical field that charges, in particular to charging circuit and charging device.
Background
At present, a single quick charging chip is often used as an output of a vehicle-mounted charger on the market, so that one vehicle-mounted charger can only carry out quick charging on a single electronic product, and if more than two electronic products are charged simultaneously, the vehicle-mounted charger can only charge more than two electronic products in a non-quick charging mode.
SUMMERY OF THE UTILITY MODEL
The utility model provides a charging circuit and charging device aims at solving present vehicle-mounted charger and can only carry out the problem of filling soon for single electronic product.
In order to achieve the above object, the present invention provides a charging circuit, which comprises a dc voltage input terminal, a first quick charging circuit, a second quick charging circuit, a first charging interface and a second charging interface;
the direct-current voltage input end is connected with the power input end of the first quick charging circuit, the power output end of the first quick charging circuit is connected with the first end of the first charging interface, the first signal end of the first quick charging circuit is connected with the second end of the first charging interface, the second signal end of the first quick charging circuit is connected with the third end of the first charging interface, and the fourth end of the first charging interface is grounded;
the direct-current voltage input end is connected with the power input end of the second quick charging circuit, the power output end of the second quick charging circuit is connected with the first end of the second charging interface, the first signal end of the second quick charging circuit is connected with the second end of the second charging interface, the second signal end of the second quick charging circuit is connected with the third end of the second charging interface, and the fourth end of the second charging interface is grounded.
Optionally, the charging circuit further includes a first indicator light circuit, an input end of the first indicator light circuit is connected to the power output end of the first fast charging circuit, and an output end of the first indicator light circuit is grounded.
Optionally, the first indicator light circuit includes a first resistor, a first light emitting diode, and a first voltage regulator diode;
the first end of the first resistor is connected with the power output end of the first quick charging circuit, the second end of the first resistor is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is grounded;
the negative electrode of the first voltage stabilizing diode is connected with the power output end of the first quick charging circuit, and the positive electrode of the first voltage stabilizing diode is grounded.
Optionally, the charging circuit further includes a second indicator light circuit;
the input end of the second indicator light circuit is connected with the power supply output end of the second quick charging circuit, and the output end of the second indicator light circuit is grounded.
Optionally, the second indicator light circuit includes a second resistor, a third resistor, a fourth resistor, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, and a second voltage regulator diode;
the anode of the second light-emitting diode is connected with the power output end of the second quick charging circuit, and the cathode of the second light-emitting diode is grounded through the second resistor;
the first end of the third resistor is connected with the power output end of the second quick charging circuit, the second end of the third resistor is connected with the anode of the third light-emitting diode, and the cathode of the third light-emitting diode is grounded;
the anode of the fourth light emitting diode is connected with the power output end of the second quick charging circuit, and the cathode of the fourth light emitting diode is grounded through the fourth resistor;
and the cathode of the second voltage stabilizing diode is connected with the power output end of the second quick charging circuit, and the anode of the second voltage stabilizing diode is grounded.
Optionally, the charging circuit further includes an overcurrent protection circuit;
the direct-current voltage input end is connected with the power supply input end of the first quick charging circuit through the overcurrent protection circuit;
and the direct-current voltage input end is connected with the power supply input end of the second quick charging circuit through the overcurrent protection circuit.
Optionally, the overcurrent protection circuit includes a fuse, a first inductor, a transient diode, and a first capacitor;
the first end of the fuse is connected with the direct-current voltage input end, and the second end of the fuse is connected with the first end of the first inductor;
the second end of the first inductor is connected with the power input end of the first quick charging circuit, and the second end of the first inductor is connected with the power input end of the second quick charging circuit; the second end of the first inductor is connected with the cathode of the transient diode, and the anode of the transient diode is grounded; the second end of the first inductor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded.
Optionally, the first fast charging circuit includes a first fast charging chip, a second capacitor, a third capacitor, a fourth capacitor, a fifth resistor, a sixth resistor, and a second inductor;
a power supply pin of the first fast charging chip is connected with the direct-current voltage input end, a bootstrap capacitor connecting pin of the first fast charging chip is connected with a first end of the second capacitor, and a second end of the second capacitor is connected with a first end of the second inductor;
the first end of the second inductor is connected with a switch node pin of the first quick charge chip, and the first end of the second inductor is grounded through the fifth resistor and the third capacitor which are connected in series;
a second end of the second inductor is connected with a first end of the sixth resistor, and a second end of the second inductor is grounded through the fourth capacitor;
a first end of the sixth resistor is connected with the positive output current detection end of the first quick charging chip, a second end of the sixth resistor is connected with the negative output current detection end of the first quick charging chip, a second end of the sixth resistor is connected with the first end of the first charging interface, and a second end of the sixth resistor is grounded through the fifth capacitor;
the first quick charging identification signal end of the first quick charging chip is connected with the second end of the first charging interface, and the second quick charging identification signal end of the first quick charging chip is connected with the third end of the first charging interface.
Optionally, the second fast charging circuit includes a second fast charging chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, and a third inductor;
a power supply pin of the second fast charging chip is connected with the direct-current voltage input end, a bootstrap capacitor connecting pin of the second fast charging chip is connected with a first end of the sixth capacitor, and a second end of the sixth capacitor is connected with a first end of the third inductor;
the first end of the third inductor is connected with a switch node pin of the second quick charge chip, and the first end of the third inductor is grounded through the seventh resistor and the seventh capacitor which are connected in series;
a second end of the third inductor is connected with a first end of the eighth resistor, and a second end of the third inductor is grounded through the eighth capacitor;
a first end of the eighth resistor is connected with the positive output current detection end of the second quick charging chip, a second end of the eighth resistor is connected with the negative output current detection end of the second quick charging chip, a second end of the eighth resistor is connected with the first end of the second charging interface, and a second end of the eighth resistor is grounded through the ninth capacitor;
and the first quick charging identification signal end of the second quick charging chip is connected with the second end of the second charging interface, and the second quick charging identification signal end of the second quick charging chip is connected with the third end of the second charging interface.
In order to achieve the above object, the present invention provides a charging device including the charging circuit as described in any one of the above.
According to the technical scheme of the embodiment, after the direct-current voltage input by the direct-current voltage input end is adjusted through the first quick charging circuit and the second quick charging circuit, the electronic products connected with the first charging interface and the second charging interface are respectively and quickly charged, and therefore the problem that the conventional vehicle-mounted charger can only quickly charge a single electronic product is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a block diagram of a charging circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of an exemplary embodiment of a charging circuit according to the present invention;
fig. 3 is a block diagram of another embodiment of the charging circuit of the present invention;
fig. 4 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention;
fig. 5 is a block diagram of a charging circuit according to another embodiment of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a block diagram of a charging circuit according to an embodiment of the present invention.
Referring to fig. 1, the charging circuit can be applied to an on-vehicle charger, and includes a dc voltage input terminal LS1 connected to an on-vehicle cigarette lighter, the dc voltage input terminal LS1 is used for getting power from the on-vehicle cigarette lighter, a first fast charging circuit 10, a second fast charging circuit 30, a first charging interface 20, and a second charging interface 40;
the dc voltage input terminal LS1 is connected to a power input terminal of the first fast charging circuit 10, a power output terminal of the first fast charging circuit 10 is connected to a first terminal of the first charging interface 20, a first signal terminal of the first fast charging circuit 10 is connected to a second terminal of the first charging interface 20, a second signal terminal of the first fast charging circuit 10 is connected to a third terminal of the first charging interface 20, and a fourth terminal of the first charging interface 20 is grounded;
the dc voltage input terminal LS1 is connected to the power input terminal of the second fast charging circuit 30, the power output terminal of the second fast charging circuit 30 is connected to the first terminal of the second charging interface 40, the first signal terminal of the second fast charging circuit 30 is connected to the second terminal of the second charging interface 40, the second signal terminal of the second fast charging circuit 30 is connected to the third terminal of the second charging interface 40, and the fourth terminal of the second charging interface 40 is grounded.
In this embodiment, the first fast charging circuit 10 may be implemented by a fast charging chip and a peripheral circuit of the fast charging chip, for example, by an IP6527 system chip and a peripheral circuit of the IP6527 system chip. The first fast charging circuit 10 supports various output fast charging protocols, for example, apple, samsung and BC1.2 protocols, high-pass QC2.0 and QC3.0, hua-shi fast charging protocol FCP, samsung fast charging protocol AFC, and the like.
The first charging interface 20 is configured to electrically connect the first fast charging circuit 10 to an electronic product to be charged, and the first charging interface 20 may be a USB interface or other suitable charging interfaces.
The second fast charging circuit 30 may be implemented by a fast charging chip and peripheral circuits of the fast charging chip, for example, by peripheral circuits of an IP6527 system chip and an IP6527 system chip. The second fast charging circuit 30 supports multiple output fast charging protocols, for example, supporting apple, samsung, and BC1.2 protocols, supporting high-pass QC2.0 and QC3.0, supporting huachen fast charging protocol FCP, supporting samsung fast charging protocol AFC, and so on.
The second charging interface 40 is configured to electrically connect the second fast charging circuit 30 to an electronic product to be charged, and the second charging interface 40 may be a USB interface or other suitable charging interfaces.
The working principle of the charging circuit is as follows: when no electronic product is connected with the circuit through the first charging interface 20 and the second charging interface 40, the first quick charging circuit 10 and the second quick charging circuit 30 obtain power from the vehicle-mounted cigarette lighter through the direct-current voltage input end LS1, and the voltage range input by the vehicle-mounted cigarette lighter is about 9V-36V and depends on the vehicle system. After the first quick charge circuit 10 gets power from the vehicle-mounted cigarette lighter through the dc voltage input terminal LS1, the first quick charge circuit 10 synchronously reduces the voltage through the power switch tube built in the internal quick charge chip to generate a no-load voltage, for example, a 5V no-load voltage is generated to the first charge interface 20. Similarly, after the second fast charging circuit 30 gets power from the vehicle-mounted cigarette lighter through the dc voltage input terminal LS1, the second fast charging circuit 30 synchronously reduces the voltage through the power switch tube built in the charging chip therein to generate a no-load voltage, for example, a 5V no-load voltage to the second charging interface 40.
When an electronic product is connected to the circuit through the first charging interface 20 and/or the second charging interface 40, the first fast charging circuit 10 identifies the fast charging protocol of the electronic product to be charged through the first signal terminal and the second signal terminal thereof, specifically, the first fast charging circuit 10 identifies the fast charging protocol of the electronic product to be charged through the first fast charging identification signal terminal DM and the second fast charging identification signal terminal DP of the internal fast charging chip thereof, adjusts the output voltage and the output current according to the fast charging protocol of the electronic product to be charged, and charges the electronic product to be charged connected to the first charging interface 20 according to the determined output voltage and output current. Similarly, the second fast charging circuit 30 identifies the fast charging protocol of the electronic product to be charged through the first signal terminal and the second signal terminal thereof, specifically, the second fast charging circuit 30 identifies the fast charging protocol of the electronic product to be charged through the first fast charging identification signal terminal DM and the second fast charging identification signal terminal DP of the internal fast charging chip thereof, adjusts the output voltage and the output current according to the fast charging protocol of the electronic product to be charged, and charges the electronic product to be charged connected to the second charging interface 40 according to the determined output voltage and output current. For example, when two electronic products are simultaneously connected to the circuit through the first charging interface 20 and the second charging interface 40, the first fast charging circuit 10 and the second fast charging circuit 30 both identify the fast charging protocol of the electronic product to be charged through the first fast charging identification signal terminal DM and the second fast charging identification signal terminal DP of their internal fast charging chips, and determine that the required output voltage of the two electronic products is 9V and the output current is 3A according to the fast charging protocol of the electronic product to be charged, at this time, the first fast charging circuit 10 adjusts the power switch tube of its internal fast charging chip, and outputs voltage 9V and current 3A from the first charging interface 20 to charge the electronic product connected to the first charging interface 20. Similarly, the second fast charging circuit 30 adjusts the power switch of the fast charging chip therein, and outputs voltage 9V and current 3A from the second charging interface 40 to charge the electronic product connected to the second charging interface 40.
It can be understood that, because the charging circuit of the present application employs two fast charging circuits, the charging circuit of the present embodiment can fast charge two electronic products at the same time. Of course, in other embodiments, the charging circuit may also include other numbers of fast charging circuits, for example, referring to fig. 2, the charging circuit includes N fast charging circuits M1-Mn and N charging interfaces N1-Nn, each of which includes a fast charging chip and peripheral circuits of the fast charging chip, so that the charging circuit can fast charge a plurality of electronic products simultaneously.
According to the technical scheme of the embodiment, after the direct-current voltage input by the direct-current voltage input end LS1 is adjusted through the first quick charging circuit 10 and the second quick charging circuit 30, the electronic products connected with the first charging interface 20 and the second charging interface 40 are respectively and quickly charged, so that the problem that the conventional vehicle-mounted charger can only quickly charge a single electronic product is solved.
Optionally, referring to fig. 3, in an embodiment, the charging circuit further includes a first indicator light circuit 50, an input terminal of the first indicator light circuit 50 is connected to the power output terminal of the first fast charging circuit 10, and an output terminal of the first indicator light circuit 50 is grounded.
The first indicator circuit 50 may be composed of a current-limiting resistor and a light emitting diode, and the first indicator circuit 50 is configured to indicate the power-on status of the first quick charging circuit 10 and the first charging interface 20, that is, determine whether the circuit is faulty according to whether the first indicator circuit 50 is turned on or not. Specifically, when there is a current between the first quick charge circuit 10 and the first charging interface 20, the LED lamp in the first indicator circuit 50 is turned on, and when there is no current between the first quick charge circuit 10 and the first charging interface 20, the LED lamp in the first indicator circuit 50 is turned off.
Optionally, referring to fig. 4, in an embodiment, the first indicator light circuit 50 includes a first resistor R1, a first light emitting diode D1, and a first zener diode ZD 1;
a first end of the first resistor R1 is connected to the power output end of the first fast charging circuit 10, a second end of the first resistor R1 is connected to the anode of the first light emitting diode D1, and the cathode of the first light emitting diode D1 is grounded; the cathode of the first zener diode ZD1 is connected to the power output terminal of the first fast charging circuit 10, and the anode of the first zener diode ZD1 is grounded.
The specific working principle is as follows: when there is a current between the first fast charging circuit 10 and the first charging interface 20, the first light emitting diode D1 is turned on. If there is no current flowing between the first quick charging circuit 10 and the first charging interface 20 due to a circuit failure, the first light emitting diode D1 is turned off. The first zener diode ZD1 is configured to stabilize a voltage across the first resistor R1 and the first light emitting diode D1 within a certain voltage range.
Optionally, referring to fig. 3, in an embodiment, the charging circuit further includes a second indicator light circuit 60; the input terminal of the second indicator light circuit 60 is connected to the power output terminal of the second fast charging circuit 30, and the output terminal of the second indicator light circuit 60 is grounded.
The second indicator circuit 60 may be composed of a current-limiting resistor and a light emitting diode, and the second indicator circuit 60 is configured to indicate the power-on status of the second quick charge circuit 30 and the second charge interface 40, that is, to determine whether the circuit is faulty or not according to whether the second indicator circuit 60 is on or not. Specifically, when there is a current between the second quick charge circuit 30 and the second charge interface 40, the LED lamp in the second indicator lamp circuit 60 is turned on, and when there is no current between the second quick charge circuit 30 and the second charge interface 40 due to a circuit failure, the LED lamp in the second indicator lamp circuit 60 is turned off.
Optionally, referring to fig. 4, in an embodiment, the second indicator light circuit 60 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a second light emitting diode D2, a third light emitting diode D3, a fourth light emitting diode D4, and a second zener diode ZD 2;
the anode of the second light emitting diode D2 is connected to the power output terminal of the second fast charging circuit 30, and the cathode of the second light emitting diode D2 is grounded via a second resistor R2; a first end of the third resistor R3 is connected to the power output end of the second fast charging circuit 30, a second end of the third resistor R3 is connected to the anode of the third led D3, and the cathode of the third led D3 is grounded; the anode of the fourth led D4 is connected to the power output terminal of the second fast charging circuit 30, and the cathode of the fourth led D4 is grounded via a fourth resistor R4; the cathode of the second zener diode ZD2 is connected to the power output terminal of the second fast charging circuit 30, and the anode of the second zener diode ZD2 is grounded.
In other embodiments, the second indicator circuit 60 may also be composed of a single light emitting diode and a single current limiting resistor; or other numbers of light emitting diodes and current limiting resistors, which can be set according to actual needs. The second resistor R2, the third resistor R3 and the fourth resistor R4 are all current limiting resistors to protect the corresponding leds.
The specific working principle is as follows: when there is current flowing between the second quick charging circuit 30 and the second charging interface 40, the second light emitting diode D2, the third light emitting diode D3 and the fourth light emitting diode D4 are simultaneously turned on. If there is no current between the first quick charging circuit 10 and the first charging interface 20 due to a circuit failure, the second light emitting diode D2, the third light emitting diode D3 and the fourth light emitting diode D4 are simultaneously turned off. The second zener diode ZD2 is configured to stabilize the voltage across the light emitting diode and the current limiting resistor within a certain voltage range.
Optionally, referring to fig. 5, in an embodiment, the charging circuit further includes an overcurrent protection circuit 70;
the dc voltage input terminal LS1 is connected to the power input terminal of the first fast charging circuit 10 through the overcurrent protection circuit 70;
the dc voltage input terminal LS1 is connected to the power input terminal of the second fast charging circuit 30 via the overcurrent protection circuit 70.
The overcurrent protection circuit 70 is configured to, when the voltage input by the dc voltage input terminal LS1 is too large, for example, exceeds a current threshold set by the overcurrent protection circuit 70, control the overcurrent protection circuit 70 to open itself to disconnect the electrical connection between the dc voltage input terminal and the first fast charging circuit 10, and disconnect the electrical connection between the dc voltage input terminal and the second fast charging circuit 30 to protect the back end circuit.
Optionally, referring to fig. 4, in an embodiment, the over-current protection circuit 70 includes a fuse F1, a first inductor L1, a transient diode TVS, and a first capacitor C1;
a first terminal of the fuse F1 is connected to the dc voltage input terminal LS1, and a second terminal of the fuse F1 is connected to a first terminal of the first inductor L1;
a second end of the first inductor L1 is connected to a power input end of the first fast charging circuit, and a second end of the first inductor L1 is connected to a power input end of the second fast charging circuit; the second end of the first inductor L1 is connected to the cathode of the transient diode, and the anode of the transient diode is grounded; the second terminal of the first inductor L1 is connected to the first terminal of the first capacitor C1, and the second terminal of the first capacitor C1 is grounded.
The fuse F1 may be a resettable fuse, which may be used to fuse itself to cut off current when the current in the circuit abnormally rises to a certain height and heat, thereby protecting the circuit from safe operation.
Optionally, referring to fig. 4, in an embodiment, the first fast charging circuit 10 includes a first fast charging chip U1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a fifth resistor R5, a sixth resistor R6, and a second inductor L2;
a power supply pin VIN of the first fast charging chip U1 is connected to a dc voltage input terminal LS1, a bootstrap capacitor connection pin BST of the first fast charging chip U1 is connected to a first end of a second capacitor C2, and a second end of the second capacitor C2 is connected to a first end of a second inductor L2;
the first end of the second inductor L2 is connected to the switch node pin LX of the first fast charging chip U1, and the first end of the second inductor L2 is grounded through a fifth resistor R5 and a third capacitor C3 which are connected in series;
a second end of the second inductor L2 is connected to a first end of the sixth resistor R6, and a second end of the second inductor L2 is grounded via the fourth capacitor C4;
a first end of the sixth resistor R6 is connected to the positive output current detection terminal VOUT of the first fast charging chip U1, a second end of the sixth resistor R6 is connected to the negative output current detection terminal VOS of the first fast charging chip U1, a second end of the sixth resistor R6 is connected to the first end 1 of the first charging interface 20, and a second end of the sixth resistor R6 is grounded via a fifth capacitor C5;
the first quick charge identification signal terminal DM of the first quick charge chip U1 is connected to the second terminal 2 of the first charge interface 20, and the second quick charge identification signal terminal DP of the first quick charge chip U1 is connected to the third terminal 3 of the first charge interface 20. The fourth terminal 4 of the first charging port 20 is grounded.
In this embodiment, the first fast charging chip U1 may be a buck converter integrated with a synchronous switch, an SOC (system on chip) supporting multiple output fast charging protocols, a T-ype-C output, and a usb PD2.0/PD3.0 protocol, for example, the first fast charging chip U1 may be an IP6527 system on chip. The first fast charging chip U1 can recognize the fast charging protocol, and a power switch tube is arranged in the first fast charging chip U1, so that the output voltage and current can be automatically adjusted according to the recognized fast charging protocol, and the output power of the first charging circuit 10 can reach 27W.
The fifth resistor R5 and the third capacitor C3 are used for absorbing high frequency noise, the second inductor L2 is an energy storage inductor, and the sixth resistor R6 is used for detecting the current output to the first charging interface 20, that is, the first fast charging chip U1 determines the current output to the electronic product to be charged according to the output current detection positive terminal VOUT and the output current detection negative terminal VOS, and dynamically adjusts the current actually output to the electronic product to be charged according to the detected current.
Optionally, referring to fig. 4, in an embodiment, the second fast charging circuit 30 includes a second fast charging chip U2, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a seventh resistor R7, an eighth resistor R8, and a third inductor L3;
a power supply pin VIN of the second fast charging chip U1 is connected to the dc voltage input terminal LS1, a bootstrap capacitor connection pin BST of the second fast charging chip U1 is connected to a first end of a sixth capacitor C6, and a second end of the sixth capacitor C6 is connected to a first end of a third inductor L3;
the first end of the third inductor L3 is connected to the switch node pin LX of the second fast charging chip U2, and the first end of the third inductor L3 is grounded via a seventh resistor R7 and a seventh capacitor C7 which are connected in series;
the second end of the third inductor L3 is connected to the first end of the eighth resistor R8, and the second end of the third inductor L3 is grounded via the eighth capacitor C8;
a first end of the eighth resistor R8 is connected to the positive output current detection terminal VOUT of the second fast charging chip U2, a second end of the eighth resistor R8 is connected to the negative output current detection terminal VOS of the second fast charging chip U2, a second end of the eighth resistor R8 is connected to the first end 1 of the second charging interface 40, and a second end of the eighth resistor R8 is grounded via a ninth capacitor C9;
the first quick charge identification signal terminal DM of the second quick charge chip U2 is connected to the second terminal 2 of the second charge interface 40, and the second quick charge identification signal terminal DP of the second quick charge chip U2 is connected to the third terminal 3 of the second charge interface 40; the fourth terminal 4 of the second charging port 40 is connected to ground.
In this embodiment, the second fast charging chip U2 may be a buck converter integrated with a synchronous switch, an SOC (system on chip) supporting multiple output fast charging protocols, a T-ype-C output, and a usb PD2.0/PD3.0 protocol, for example, the second fast charging chip U2 may be an IP6527 system on chip. The second fast charging chip U2 can recognize the fast charging protocol, and a power switch tube is arranged in the second fast charging chip U2, so that the output voltage and current can be automatically adjusted according to the recognized fast charging protocol, and the output power of the second charging circuit 30 can reach 27W.
The seventh resistor R7 and the seventh capacitor C7 are used for absorbing high frequency noise, the third inductor L3 is an energy storage inductor, the eighth resistor R8 is used for detecting the current output to the second charging interface 40, that is, the second fast charging chip U2 determines the current output to the electronic product to be charged according to the output current detection positive terminal VOUT and the output current detection negative terminal VOS, and dynamically adjusts the current actually output to the electronic product to be charged according to the detected current.
It can be understood that each fast charging circuit of the charging circuit is set to adopt an IP6527 system-level chip for independent output, so that the single-path output of the charging circuit can reach 27W, the double-path output of the charging circuit can reach 54W, and both charging interfaces of the charging circuit can support fast charging output.
The utility model also provides a charging device, this charging device includes as above charging circuit. The detailed structure of the charging circuit can refer to the above embodiments, and is not described herein again; it can be understood that, because the utility model discloses an above-mentioned charging circuit has been used among the charging device, consequently, the utility model discloses charging device's embodiment includes all technical scheme of the whole embodiments of above-mentioned charging circuit, and the technical effect that reaches is also identical, no longer gives details here.
In this embodiment, the charging device may be an in-vehicle charger, a quick charging adapter, an intelligent socket, or the like.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A charging circuit is characterized by comprising a direct-current voltage input end, a first quick charging circuit, a second quick charging circuit, a first charging interface and a second charging interface;
the direct-current voltage input end is connected with the power input end of the first quick charging circuit, the power output end of the first quick charging circuit is connected with the first end of the first charging interface, the first signal end of the first quick charging circuit is connected with the second end of the first charging interface, the second signal end of the first quick charging circuit is connected with the third end of the first charging interface, and the fourth end of the first charging interface is grounded;
the direct-current voltage input end is connected with the power input end of the second quick charging circuit, the power output end of the second quick charging circuit is connected with the first end of the second charging interface, the first signal end of the second quick charging circuit is connected with the second end of the second charging interface, the second signal end of the second quick charging circuit is connected with the third end of the second charging interface, and the fourth end of the second charging interface is grounded.
2. The charging circuit of claim 1, further comprising a first indicator light circuit, an input of the first indicator light circuit being coupled to the power output of the first fast charging circuit, an output of the first indicator light circuit being coupled to ground.
3. The charging circuit of claim 2, wherein the first indicator light circuit comprises a first resistor, a first light emitting diode, and a first zener diode;
the first end of the first resistor is connected with the power output end of the first quick charging circuit, the second end of the first resistor is connected with the anode of the first light-emitting diode, and the cathode of the first light-emitting diode is grounded;
the negative electrode of the first voltage stabilizing diode is connected with the power output end of the first quick charging circuit, and the positive electrode of the first voltage stabilizing diode is grounded.
4. The charging circuit of claim 1, wherein the charging circuit further comprises a second indicator light circuit;
the input end of the second indicator light circuit is connected with the power supply output end of the second quick charging circuit, and the output end of the second indicator light circuit is grounded.
5. The charging circuit of claim 4, wherein the second indicator light circuit comprises a second resistor, a third resistor, a fourth resistor, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, and a second zener diode;
the anode of the second light-emitting diode is connected with the power output end of the second quick charging circuit, and the cathode of the second light-emitting diode is grounded through the second resistor;
the first end of the third resistor is connected with the power output end of the second quick charging circuit, the second end of the third resistor is connected with the anode of the third light-emitting diode, and the cathode of the third light-emitting diode is grounded;
the anode of the fourth light emitting diode is connected with the power output end of the second quick charging circuit, and the cathode of the fourth light emitting diode is grounded through the fourth resistor;
and the cathode of the second voltage stabilizing diode is connected with the power output end of the second quick charging circuit, and the anode of the second voltage stabilizing diode is grounded.
6. The charging circuit of any of claims 1-5, further comprising an over-current protection circuit;
the direct-current voltage input end is connected with the power supply input end of the first quick charging circuit through the overcurrent protection circuit;
and the direct-current voltage input end is connected with the power supply input end of the second quick charging circuit through the overcurrent protection circuit.
7. The charging circuit of claim 6, wherein the over-current protection circuit comprises a fuse, a first inductor, a transient diode, and a first capacitor;
the first end of the fuse is connected with the direct-current voltage input end, and the second end of the fuse is connected with the first end of the first inductor;
the second end of the first inductor is connected with the power input end of the first quick charging circuit, and the second end of the first inductor is connected with the power input end of the second quick charging circuit; the second end of the first inductor is connected with the cathode of the transient diode, and the anode of the transient diode is grounded; the second end of the first inductor is connected with the first end of the first capacitor, and the second end of the first capacitor is grounded.
8. The charging circuit of claim 6, wherein the first fast charging circuit comprises a first fast charging chip, a second capacitor, a third capacitor, a fourth capacitor, a fifth resistor, a sixth resistor, and a second inductor;
a power supply pin of the first fast charging chip is connected with the direct-current voltage input end, a bootstrap capacitor connecting pin of the first fast charging chip is connected with a first end of the second capacitor, and a second end of the second capacitor is connected with a first end of the second inductor;
the first end of the second inductor is connected with a switch node pin of the first quick charge chip, and the first end of the second inductor is grounded through the fifth resistor and the third capacitor which are connected in series;
a second end of the second inductor is connected with a first end of the sixth resistor, and a second end of the second inductor is grounded through the fourth capacitor;
a first end of the sixth resistor is connected with the positive output current detection end of the first quick charging chip, a second end of the sixth resistor is connected with the negative output current detection end of the first quick charging chip, a second end of the sixth resistor is connected with the first end of the first charging interface, and a second end of the sixth resistor is grounded through the fifth capacitor;
the first quick charging identification signal end of the first quick charging chip is connected with the second end of the first charging interface, and the second quick charging identification signal end of the first quick charging chip is connected with the third end of the first charging interface.
9. The charging circuit of claim 8, wherein the second fast charging circuit comprises a second fast charging chip, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, an eighth resistor, and a third inductor;
a power supply pin of the second fast charging chip is connected with the direct-current voltage input end, a bootstrap capacitor connecting pin of the second fast charging chip is connected with a first end of the sixth capacitor, and a second end of the sixth capacitor is connected with a first end of the third inductor;
the first end of the third inductor is connected with a switch node pin of the second quick charge chip, and the first end of the third inductor is grounded through the seventh resistor and the seventh capacitor which are connected in series;
a second end of the third inductor is connected with a first end of the eighth resistor, and a second end of the third inductor is grounded through the eighth capacitor;
a first end of the eighth resistor is connected with the positive output current detection end of the second quick charging chip, a second end of the eighth resistor is connected with the negative output current detection end of the second quick charging chip, a second end of the eighth resistor is connected with the first end of the second charging interface, and a second end of the eighth resistor is grounded through the ninth capacitor;
and the first quick charging identification signal end of the second quick charging chip is connected with the second end of the second charging interface, and the second quick charging identification signal end of the second quick charging chip is connected with the third end of the second charging interface.
10. A charging device, characterized in that it comprises a charging circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021133852.5U CN212588107U (en) | 2020-06-16 | 2020-06-16 | Charging circuit and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021133852.5U CN212588107U (en) | 2020-06-16 | 2020-06-16 | Charging circuit and charging device |
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| Publication Number | Publication Date |
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| CN212588107U true CN212588107U (en) | 2021-02-23 |
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| CN202021133852.5U Active CN212588107U (en) | 2020-06-16 | 2020-06-16 | Charging circuit and charging device |
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| CN (1) | CN212588107U (en) |
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2020
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Address after: 518000, 3rd Floor, Building A2, Nanshan Zhiyuan, No. 1001 Xueyuan Avenue, Changyuan Community, Taoyuan Street, Nanshan District, Shenzhen, Guangdong Province Patentee after: Shenzhen 3600 Smart Life Technology Co.,Ltd. Country or region after: China Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee before: SHENZHEN QIHU INTELLIGENT TECHNOLOGY CO.,LTD. Country or region before: China |