CN218771356U

CN218771356U - Type-C PD one-to-two charging circuit and charging wire

Info

Publication number: CN218771356U
Application number: CN202222851472.0U
Authority: CN
Inventors: 杨国利; 刘裕; 黄国枝; 吴信珍
Original assignee: Shenzhen Tengteng Hi Tech Electronic Technology Co ltd
Current assignee: Shenzhen Tengteng Hi Tech Electronic Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-28
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a circuit design technical field, concretely relates to Type-C PD one drags two charging circuit and charging wires. The basis the utility model provides a Type-C PD drags two charging circuit, acquire two charging device's of connecting on second link and the third link respectively through first PD protocol chip U1 and second PD protocol chip U3 charging information, first PD chip carries out rational distribution with the input power on the first link, acquire charging device's on the first link power through first PD protocol chip U1, the microprocessing chip will be according to the input voltage of first link and whether insert equipment and the charged state to second link and third link, feed back to first PD protocol chip and second PD protocol chip, first PD protocol chip and second PD protocol chip are with the last equipment communication that is filled of second link and third link, thereby make two charging device can both charge under its maximum charging power who corresponds, realized filling two charging device soon simultaneously.

Description

Type-C PD one-to-two charging circuit and charging wire

Technical Field

The utility model relates to a circuit design technical field, concretely relates to Type-C PD one drags two charging circuit and charging wires.

Background

In the information era, electronic digital products such as computers, smart phones and the like become necessities of life, study and work of people, and the electronic digital products also slowly and uniformly use Type-C as a charging interface. Most of the charging devices equipped in the electronic digital product standard only have a single interface, and the charging devices with the single interface cannot charge a computer and a mobile phone or simultaneously charge the computer and other charged devices.

In order to solve the above problems, two solutions are available on the market:

(1) Many interfaces charging wire, but can only export 5V and charge, can not realize Type-C PD simultaneously and fill soon, so can not make full use of powerful charger power, two come the charge rate slow excessively, charge time overlength, the user can not obtain the electric energy fast, influences work study etc..

(2) Manufacturers have proposed multi-port chargers, which can solve the problem of simultaneous charging of multiple charged devices. But also brings new problems: for example, the cost of the charger is high, and the size is large, so that the charging equipment which is demanded to be mini by the consumers at present is quite opposite. In addition, when charging and data transmission are performed on mobile phones of different brands, more types of interface charging data lines need to be carried.

At present, a plurality of single charging interfaces on the market are provided with charging connectors, one charging data line cannot simultaneously charge a computer and a mobile phone, if the interfaces of the mobile phone and the computer are different, one charging data line cannot meet the requirement of alternately charging the computer, charging the mobile phone and transmitting data, the requirements can be met only by two charging data lines with different interfaces, and great inconvenience is brought to users. The application provides a device which can charge a plurality of devices with different types of interfaces simultaneously by carrying one line with a user, and data transmission between a computer and intelligent equipment is realized.

The Type-C one-to-two charger on the market at present has the following disadvantages:

(1) The PD quick charging is not supported, the PD quick charging can be realized only by common 5V, the charging speed is too low, and the data transmission function is not realized.

(2) When the dual-port quick charging device is used, the PD quick charging is realized only by supporting a single interface, the two-port simultaneous PD quick charging is not supported, and when the two ports are used simultaneously, the two ports are charged by common 5V, so that the power of the charger cannot be fully utilized, and resources are wasted.

(3) Only a single interface is allowed to charge, and two or more interfaces cannot be charged simultaneously.

(4) The charger power can not reach 100W, and only supports the fast charging of the low-power PD.

Therefore, the Type-C one-to-two charger in the market at present has certain defects, and has room for continuous improvement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a Type-C PD one drags two charging circuit and charging wire, its aim at solve the one among the prior art drag two charging wires need not give two technical problem that equipment filled soon simultaneously.

In one aspect, the utility model provides a Type-C PD one drags two charging circuits, include: the power supply comprises a first connecting end, a second connecting end, a third connecting end, a first PD protocol chip U1, a switch control module U2, a second PD protocol chip U3, a micro-processing chip U4, a voltage conversion module U5 and an auxiliary power supply module U6;

the first connecting end is used for connecting a charging input interface; the first connection end comprises a first communication pin CC1, a second communication pin CC2, a first signal pin D +, a second signal pin D-and a first power supply pin VBUSIN;

the first power supply pin VBUSIN is connected with the first PD protocol chip U1 and a second power supply pin VBUSC on the second connecting end respectively; the first communication pin CC1 is connected with a communication pin of the first PD protocol chip U1; the second communication pin CC2 is grounded; the output end of the first PD protocol chip U1 is connected with the second connecting end;

the first power supply pin VBUSIN is connected with a power supply input pin of the auxiliary power supply module U6; a power supply output pin VDD of the auxiliary power supply module U6 is connected with a power supply pin of the micro-processing chip U4 so as to supply power to the micro-processing chip U4; the micro-processing chip U4 is respectively connected with the first PD protocol chip U1, the second PD protocol chip U3, the switch control module U2 and the voltage conversion module U5;

the first signal pin D + and the second signal pin D-are connected with the input end of the switch control module U2; the output end of the switch control module U2 is respectively connected with the input ends of the second connecting end signal and the third connecting end signal; the first power supply pin VBUSIN is further connected to an input end of the voltage conversion module U5, and an output end of the voltage conversion module U5 is connected to the second PD protocol chip U3 and the third connection end, respectively.

According to the utility model provides a Type-C PD one drags two charging circuit, still include first transistor Q1 and second transistor Q2;

the first pole of the first transistor Q1 is connected with a first power supply pin VBUSIN, the second pole of the first transistor Q1 is connected with a second power supply pin VBUSC, the third pole of the first transistor Q1 is connected with the first pole of the second transistor Q2, the second pole of the second transistor Q2 is grounded, and the third pole of the second transistor Q2 is connected with a switch control pin of the first PD protocol chip U1.

According to the utility model provides a Type-C PD one drags two charging circuits, still include third transistor Q3 and first inductance L1;

the voltage conversion module U5 comprises a first voltage feedback pin and a first voltage output pin, and the second PD protocol chip U3 comprises a second voltage feedback pin, a first control pin and a second control pin;

a first voltage feedback pin of the voltage conversion module U5 is connected with a voltage feedback pin of the second PD protocol chip U3; a first voltage output pin of the voltage conversion module U5 is connected to one end of the first inductor L1 and a power supply pin of the second PD protocol chip U3, the other end of the first inductor L1 is connected to a first pole of the third transistor Q3, a second pole of the third transistor Q3 is connected to a third power supply pin VBUSL on the third connection end, meanwhile, the second pole of the third transistor Q3 is also connected to a second control pin of the second PD protocol chip U3, and a third pole of the third transistor Q3 is connected to a first control pin of the second PD protocol chip U3.

According to the utility model provides a Type-C PD one-driving-two charging circuit, still include fourth transistor Q4;

an output pin of the first PD protocol chip U1 is connected to a first pole of the fourth transistor Q4, a second pole of the fourth transistor Q4 is connected to the third communication pin CC3 at the second connection end, and a third pole of the fourth transistor Q4 is configured to receive a power supply voltage VDD.

According to the utility model provides a Type-C PD one-to-two charging circuit, still include second resistance R2 and third resistance R3;

the voltage conversion module U5 further comprises a first current sampling pin and a second current sampling pin; the first current sampling pin and the second current sampling pin are both grounded, and two ends of the third resistor R3 are respectively connected with the first current sampling pin and the second current sampling pin;

the second PD protocol chip U3 also comprises a third control pin and a fourth control pin; the third control pin and the fourth control pin are grounded, and two ends of the second resistor R2 are connected with the third control pin and the fourth control pin respectively.

According to the utility model provides a Type-C PD one-for-two charging circuit, microprocessor chip U4 includes first chip pin, second chip pin, third chip pin, fourth chip pin MCUC, fifth chip pin MCUL, sixth chip pin, seventh chip pin and eighth chip pin;

the first chip pin, the second chip pin and the third chip pin are all connected with a control pin on the first PD protocol chip U1; the fourth chip pin MCUC is connected to the third communication pin CC 3; the fifth chip pin MCUL is connected to a fourth communication pin CC4 at the third connection end; the sixth chip pin is connected with a control pin of the switch control module U2;

the second PD protocol chip U3 further includes a fifth control pin and a sixth control pin, and the seventh chip pin and the eighth chip pin are connected to the fifth control pin and the sixth control pin on the second PD protocol chip U3, respectively.

According to the utility model provides a Type-C PD one drags two charging circuits, switch control module U2 includes first input pin, second input pin, third output pin, fourth output pin, fifth output pin and sixth output pin;

the second connecting end comprises a third signal pin D1+ and a fourth signal pin D1-; the third connecting end comprises a fifth signal pin D2+ and a sixth signal pin D2-;

the first signal pin D + and the second signal pin D-are respectively connected with the first input pin and the second input pin; a third output pin and a fourth output pin of the switch control module U2 are respectively connected with a third signal pin D1+ and a fourth signal pin D1-of the second connecting end; and a fifth output pin and a sixth output pin of the switch control module U2 are respectively connected with a fifth signal pin D2+ and a sixth signal pin D2-of the third connecting end.

According to the utility model provides a Type-C PD one-driving-two charging circuit, the charging circuit also comprises a fourth resistor R4 and a fifth resistor R5;

the fourth chip pin MCUC is connected to the third communication pin CC3 through the fourth resistor R4; the fifth chip pin MCUL is connected to the fourth communication pin CC4 through the fifth resistor R5.

According to the utility model provides a Type-C PD one-to-two charging circuit, the second connecting end and the third connecting end are used for connecting a charging output interface;

the auxiliary power supply module U6 comprises a linear voltage-stabilizing power supply chip; the switch control module U2 comprises an analog switch chip; the voltage conversion module U5 includes a dc buck chip.

On the other hand, the utility model also provides a Type-C PD drags two charging wires, include as above Type-C PD drags two charging circuit.

The foundation the utility model provides a Type-C PD one drags two charging circuit, acquire two battery charging outfits's of connecting on second link and the third link the biggest charging voltage respectively through first PD agreement chip U1 and second PD agreement chip U3, the input voltage of micro-processing chip on with first link carries out rational distribution for two battery charging outfits can both charge under its maximum charging power that corresponds, have realized filling two battery charging outfits fast simultaneously.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a charging circuit according to an embodiment of the present invention;

fig. 2 is a pin diagram of a first PD protocol chip U1 according to an embodiment of the present invention;

fig. 3 is a schematic pin diagram of a microprocessor chip U4 according to an embodiment of the present invention;

fig. 4 is a pin diagram of a voltage conversion module U5 according to an embodiment of the present invention;

fig. 5 is a schematic pin diagram of a switch control module U2 according to an embodiment of the present invention;

fig. 6 is a pin diagram of a second PD protocol chip U3 according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous specific details are set forth in order to provide a better understanding of the present invention. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some cases, operations related to the present invention are not shown or described in the specification, so as to avoid the core part of the present invention being overwhelmed by excessive description, and it is not necessary for those skilled in the art to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The utility model provides a transistor is three-terminal transistor, and its three terminal is control pole, first utmost point and second utmost point. The transistor may be a bipolar transistor, a field effect transistor, or the like. For example, when the transistor is a bipolar transistor, the control electrode of the transistor refers to a base electrode of the bipolar transistor, the first electrode may be a collector or an emitter of the bipolar transistor, and the corresponding second electrode may be an emitter or a collector of the bipolar transistor; when the transistor is a field effect transistor, the control electrode refers to a gate electrode of the field effect transistor, the first electrode may be a drain electrode or a source electrode of the field effect transistor, and the corresponding second electrode may be a source electrode or a drain electrode of the field effect transistor.

In addition, the first, second, third, etc. in the present invention are only used for the auxiliary instructions to the technical solutions, and are not in a fixed order, and therefore do not play a limiting role to the solution of the present invention.

The first embodiment is as follows:

the present embodiment provides a Type-C PD one-to-two charging circuit, as shown in fig. 1 to 6, including: the power supply comprises a first connecting end, a second connecting end, a third connecting end, a first PD protocol chip U1, a switch control module U2, a second PD protocol chip U3, a micro-processing chip U4, a voltage conversion module U5 and an auxiliary power supply module U6.

The first connecting end is used for connecting the charging input interface, and the second connecting end and the third connecting end are used for connecting the charging output interface. Specifically, the charging input interface and the charging output interface are electrically connected with the corresponding connecting ends in a welding mode.

The types of the pins included on the first connection end, the second connection end and the third connection end are similar, and the three connection ends at least include a power supply pin, a differential signal pin and a communication pin (i.e., a pin configured with a channel). For example, the first connection end of the embodiment includes a first communication pin CC1, a second communication pin CC2, a first signal pin D +, a second signal pin D-, and a first power supply pin VBUSIN.

The first power supply pin VBUSIN is connected to the first PD protocol chip U1, the second power supply pin VBUSC at the second connection end, the power supply pin of the voltage conversion module U5, and the power supply pin of the auxiliary power supply module U6, and the first power supply pin VBUSIN is configured to receive an electrical signal from the charging cradle and supply the received electrical signal to each module. As shown in fig. 1, the first communication pin CC1 is connected to the communication pin U11 of the first PD protocol chip U1; the second communication pin CC2 is grounded; the output end of the first PD protocol chip U1 is connected with the second connecting end, and the first PD protocol chip U1 is used for communicating with the equipment connected with the second connecting end so as to charge and communicate the equipment connected with the second connecting end.

Specifically, the first power supply pin VBUSIN is connected to a power supply input pin of the auxiliary power supply module U6 to supply power to the auxiliary power supply module U6. As shown in fig. 3, the power supply output pin VDD of the auxiliary power module U6 is connected to the power supply pin U41 of the microprocessor chip U4 to supply power to the microprocessor chip U4; the micro-processing chip U4 is respectively connected with the first PD protocol chip U1, the second PD protocol chip U3, the switch control module U2 and the voltage conversion module U5.

The first signal pin D + and the second signal pin D-are connected with the input end of the switch control module U2; the output end of the switch control module U2 is respectively connected with the signal input ends of the second connecting end and the third connecting end; the first power supply pin VBUSIN is also connected with the input end of the voltage conversion module U5, and the output end of the voltage conversion module U5 is respectively connected with the second PD protocol chip U3 and the third connecting end.

According to the Type-C PD one-to-two charging circuit provided in this embodiment, the maximum charging voltages of the two charging devices connected to the second connection end and the third connection end are respectively obtained through the first PD protocol chip U1 and the second PD protocol chip U3, and the input voltage at the first connection end is reasonably distributed by the microprocessor chip U4, so that the two charging devices can be charged at the corresponding maximum charging powers, and the two charging devices can be rapidly charged at the same time. In addition, the Type-C PD one-to-two charging circuit of the embodiment can also realize high-speed data transmission of two devices. For example, when a user is on business, only one Type-C PD one-to-two charging wire needs to be carried, and the mobile phone and the notebook can be charged quickly.

Further, the charging circuit of the present embodiment further includes a first transistor Q1 and a second transistor Q2; a first pole of the first transistor Q1 is connected to the first power supply pin VBUSIN, a second pole of the first transistor Q1 is connected to the second power supply pin VBUSC, a third pole of the first transistor Q1 is connected to the first pole of the second transistor Q2, the second pole of the second transistor Q2 is grounded, and the third pole of the second transistor Q2 is connected to the switch control pin U12 of the first PD protocol chip U1. The first PD protocol chip U1 further includes a power supply pin U17, and the power supply pin U17 is connected to a power supply output pin VDD of the auxiliary power supply module U6.

Further, the charging circuit of the present embodiment further includes a third transistor Q3 and a first inductor L1; the voltage conversion module U5 includes a first voltage feedback pin U51 and a first voltage output pin U52, as shown in fig. 6, the second PD protocol chip U3 includes a power supply pin U39, a voltage feedback pin U31, a first control pin U32, and a second control pin U33; the first voltage feedback pin U51 of the voltage conversion module U5 is connected to the voltage feedback pin of the second PD protocol chip U3. A first voltage output pin U52 of the voltage conversion module U5 is respectively connected to one end of a first inductor L1 and a power supply pin U39 of the second PD protocol chip U3, the other end of the first inductor L1 is connected to a first pole of a third transistor Q3, a second pole of the third transistor Q3 is connected to a third power supply pin VBUSL at a third connection end, the second pole of the third transistor Q3 is also connected to a second control pin U33 of the second PD protocol chip U3, and a third pole of the third transistor Q3 is connected to a first control pin U32 of the second PD protocol chip U3.

Further, the charging circuit of the present embodiment further includes a fourth transistor Q4; an output pin U16 of the first PD protocol chip U1 is connected to a first pole of a fourth transistor Q4, a second pole of the fourth transistor Q4 is connected to a third communication pin CC3 at the second connection end, and a third pole of the fourth transistor Q4 is configured to receive a power supply voltage VDD.

Further, the charging circuit of the present embodiment further includes a second resistor R2 and a third resistor R3; as shown in fig. 4, the voltage conversion module U5 further includes a first current sampling pin U53, a second current sampling pin U54, and an enable control pin U55; the first current sampling pin U53 and the fourth current sampling pin U54 are both grounded, and both ends of the third resistor R3 are connected with the first current sampling pin U53 and the second current sampling pin U54, respectively.

Further, the second PD protocol chip U3 in the charging circuit of this embodiment further includes a third control pin U34 and a fourth control pin U35; the third control pin U34 and the fourth control pin U35 are both grounded, and two ends of the second resistor R2 are connected to the third control pin U34 and the fourth control pin U35, respectively.

The microprocessor chip U4 of the present embodiment includes a first chip pin U42, a second chip pin U43, a third chip pin U44, a fourth chip pin MCUC, a fifth chip pin MCUL, a sixth chip pin U45, a seventh chip pin U46, an eighth chip pin U47, and a ninth chip pin U48. A first chip pin U42, a second chip pin U43 and a third chip pin U44 are respectively connected with three control pins U13, U14 and U15 on the first PD protocol chip U1; a fourth chip pin MCUC is connected with a third communication pin CC 3; the fifth chip pin MCUL is connected to a fourth communication pin CC4 at the third connection end; and a sixth chip pin U45 is connected with a control pin of the switch control module U2. The second PD protocol chip U3 further includes a fifth control pin U36 and a sixth control pin U37, and the seventh chip pin U46 and the eighth chip pin U47 are connected to the fifth control pin U36 and the sixth control pin U37 on the second PD protocol chip U3, respectively. The ninth chip pin U48 is connected to the enable control pin U55, and the microprocessor chip U4 is powered through the enable control pin U55. And a pin U38 of the second PD protocol chip U3 is connected with a fourth communication pin CC4 and is used for communicating with equipment on the fourth communication pin CC 4.

As shown in fig. 5, the switch control module U2 includes a first input pin U21, a second input pin U22, a third output pin U23, a fourth output pin U24, a fifth output pin U25, a sixth output pin U26, a control signal receiving pin U27, and a power supply pin U28. The second connecting end comprises a third signal pin D1+ and a fourth signal pin D1-; the third connection terminal includes a fifth signal pin D2+ and a sixth signal pin D2-. The first signal pin D + and the second signal pin D-are respectively connected with the first input pin U21 and the second input pin U22; a third output pin U23 and a fourth output pin U24 of the switch control module U2 are respectively connected with a third signal pin D1+ and a fourth signal pin D1-of the second connecting end; a fifth output pin U25 and a sixth output pin U26 of the switch control module U2 are connected to a fifth signal pin D2+ and a sixth signal pin D2-of the third connection terminal, respectively. The sixth chip pin U45 is connected to the control signal receiving pin U27, and the control signal receiving pin U27 is used for receiving a control signal of the microprocessor chip U4. Power pin U28 is for receiving a supply voltage VDD.

Further, the charging circuit of the present embodiment further includes a fourth resistor R4 and a fifth resistor R5; a fourth chip pin MCUC is connected with a third communication pin CC3 through a fourth resistor R4; the fifth chip pin MCUL is connected to the fourth communication pin CC4 through a fifth resistor R5.

The second connection end and the third connection end of the present embodiment are used for connecting the charging output interface. For example, the first connection end can be connected with a Type-C connector (i.e., a Type-C charging head), the second connection end can be connected with a Type-C connector or a Lightning connector, and the third connection end can also be connected with other physical interfaces such as a Type-C connector or a Lightning connector.

The auxiliary power supply module U6 of the present embodiment includes a linear voltage-stabilizing power supply chip; the switch control module U2 comprises an analog switch chip; the voltage conversion module U5 includes a DC voltage reduction chip, and the voltage conversion module U5 of this embodiment is a DC-DC voltage reduction chip.

In this embodiment, the first PD protocol chip U1 may adopt one of multiple PD protocol chips such as LDR6023 or VL 105. The second PD protocol chip U3 adopts one of the PD protocol chips with I2C multiple I/O ports, such as SW2303, IP2716, SC 2011. The voltage conversion module U5 in the microchip chip with ADC/GPIO interface, such as GVM08X002, MCU684P, HC F003, CSU8RP3215, may be one of the chips with 100% duty cycle, such as SP1081F, ETA2808, TMI2286D, CN3903, SC8112, may be used for the microchip chip U4. The switch control module U2 may adopt one of the high-speed analog switch chips such as WAS7222, SGM7222, BL1530TQFN, RS2227, and the like. The auxiliary power supply module U6 may be one of linear voltage-stabilizing power supply chips with an output voltage of 5V, such as MST5350BTS, HT7550, RS3002, CJ78L05, and the like.

The D +/D-type pin of this embodiment indicates that the USB bus signal is a differential signal, that is, a pair of differential signals with the same amplitude and opposite phases is used for data transmission. CC type pin ratio indicates: the Type-C Configuration Channel configures the pins of the Channel.

The first PD protocol chip U1 functions in operation as follows:

(1) And the mobile phone/tablet personal computer is responsible for negotiating with the mobile phone/tablet personal computer connected to the second connecting end and the charger connected to the first connecting end. After the negotiation is completed, the charger charges the mobile phone/the tablet computer through the second connecting end according to the negotiated mode.

(2) When the second connecting end is not connected with the charged device, the U1 negotiates with the charger on the first connecting end, and after the negotiation is successful, the highest gear charging voltage of the charger is induced.

(3) And reading the power of the charger on the first connecting end, and intelligently distributing power to the devices on the second connecting end and the third connecting end.

The second PD protocol chip U3 is used for performing communication negotiation with a charged device such as a mobile phone/tablet connected to the third connection end, and after the negotiation is successful, the voltage conversion module U5 steps down the charger connected to the first connection end, and adjusts the voltage to be charged according to a protocol negotiated by the communication between the U3 and the mobile phone/tablet of the third connection end.

The voltage conversion module U5 is used for reducing the voltage of the charger on the first connection end to the corresponding voltage according to the signal fed back by the U3 to charge the intelligent equipment such as the mobile phone/the tablet and the like on the second connection end.

The micro-processing chip U4 is used for judging whether the second connecting end and the third connecting end are connected with the charged device or not and transmitting the collected signals to the U1, the U2, the U3 and the U5 in real time. U1, U2, U3 and U5 realize corresponding function after the chip internal decoding according to the signal that U4 transmitted.

The switch control module U2 is used for switching the D + and the D-of the computer on the first connecting end to the mobile phone/tablet on the second connecting end and the third connecting end to realize communication data transmission.

The bonding wire bonding pad interface of the first connecting end can be connected with a Type-C connector, and the first connecting end can be connected with charging equipment such as a computer/charger and the like; the bonding wire bonding pad of the second connecting end can be connected with a Type-C connector, and the second connecting end can be connected with electronic digital products such as a mobile phone, a tablet computer and the like; the bonding pad of the third connection terminal can be connected to a Type-C connector or a Lightning connector, and the third connection terminal can be connected to a mobile phone/tablet/computer electronic digital product.

The auxiliary power supply module U6 is used for directly getting power from a bonding pad interface of the first connection end, and providing stable and reliable voltage for the U1, the U2 and the U4 after linear voltage reduction and voltage stabilization.

Specifically, in this embodiment, the functions of each pin of the first PD protocol chip U1 are respectively: the U11 is used for carrying out charging protocol communication with the charging equipment at the first connecting end; the U12 is used for controlling the opening and closing of the VBUS MOS and is opened or closed according to the access state of the second connecting end. The U13 is used for feeding back the power of the charging device connected with the first connection end. The U14 is used for feeding back the power of the charging device connected to the first connection terminal. U15 is configured to receive the third connection charging status signal. The U16 is used for carrying out protocol communication with the charged equipment at the second connecting end; u17 is used to supply voltage to the chip.

Specifically, in this embodiment, the types and functions of the pins in U4 are respectively: u41 is used for supplying power to the microchip; the U42 is used for receiving power fed back by a PD protocol chip to the charging equipment connected with the first connection end. The U43 is used for receiving the power fed back by the PD protocol chip to the charging equipment connected with the first connection end; the U44 is used for feeding back the charging state of the charged equipment connected with the third connecting end; the U45 is used for controlling the switching of the analog switch; u46 is an I2C communication pin for serial data line SDA, and U47 is an I2C communication pin for serial clock line SCL. The I2C communication is mainly used for controlling and adjusting the PD charging protocol.

The types and the functions of the pins of the U5 are respectively as follows: the U51 is used for voltage feedback and is used for adjusting the output voltage of the third connecting end; u52 is used for providing voltage for the third connecting terminal; u53 is used for current sampling; u54 is used for current sampling; u55 is used to enable control and is responsible for signal input.

The types and the functions of the pins of the U2 are respectively as follows: u21 is used for data transmission signal input; u22 is used for data transmission signal input; u23 is used for data transmission signal output; u24 is used for data transmission signal output; u25 is used for data transmission signal output; u26 is used for data transmission signal output; u27 is a switch selection pin responsible for switching data transmission channels. U28 is used to provide internal voltages to the chip.

The types and the functions of the pins of the U2 are respectively as follows: u31 is used for adjusting the output voltage of the third connecting end; u32 is used to control the switching of the VBUS MOS. And the state of the third connecting end is switched on or off. U33 is used for detecting the output voltage of the third connecting end; u34 is used for current sampling; u35 is used for current sampling; u36 is for serial clock line SCL; u37 is for serial data line SDA; the U38 is used to detect whether the third connection is connected to the device. U39 is used to provide voltage to the chip interior.

The charging circuit of the embodiment has the following advantages:

(1) The charging circuit of this embodiment supports two mouthful of PD fast charges simultaneously, compares two interface output voltages and all only has 5V or two interface fast charge another interface 5V's circuit, and the circuit charging speed of this embodiment is faster.

(2) When the charging circuit of this embodiment needs the multiple equipment to charge simultaneously, need not many mouthfuls of chargers and can expand the charger of single interface into two mouthfuls, intelligent matching equipment realizes that the PD fills soon. One line can realize, realizes charging simultaneously more convenient than using many charging wires of many mouthfuls of chargers collocation.

(3) The charging circuit of the embodiment has the charging power up to 100W, and supports simultaneous charging of a computer and intelligent equipment, and compared with a common circuit which only supports low-power PD quick charging, the charging circuit of the embodiment has the advantages of higher charging speed and wider application.

(4) The charging circuit of this embodiment has the data transmission function, can realize the data communication between computer and the smart machine, and the output interface of this application can connect a plurality of physical interfaces of different grade Type, saves the trouble of frequently trading the line because of the smart machine uses different physical interfaces, and a line can realize using the transmission of Type-C, lightning physical interface, need not to trade the line.

According to the circuit that this embodiment provided, the user need charge simultaneously many equipment, or does not want frequent line change also to realize carrying out data transmission because of the smart machine uses the physical interface of different grade Type, and a line can realize many mouthful of equipment PD fast charging simultaneously to the data module that charges is dragged by two to a Type-C PD of quick transmission data.

Example two:

this embodiment provides a Type-C PD one drags two charging wires, and the charging wire includes the one drags two charging circuit as above embodiment one provides, all sets up Type-C interface at charging circuit's first link, second link and third link, can realize filling fast and the high-speed transmission of data two charging equipment simultaneously.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a Type-C PD one drags two charging circuit which characterized in that includes: the device comprises a first connecting end, a second connecting end, a third connecting end, a first PD protocol chip U1, a switch control module U2, a second PD protocol chip U3, a micro-processing chip U4, a voltage conversion module U5 and an auxiliary power supply module U6;

the first power supply pin VBUSIN is connected with the first PD protocol chip U1 and the second power supply pin VBUSC on the second connection terminal, respectively; the first communication pin CC1 is connected with a communication pin of the first PD protocol chip U1; the second communication pin CC2 is grounded; the output end of the first PD protocol chip U1 is connected with the second connecting end;

2. The Type-C PD one-driving-two charging circuit of claim 1, further comprising a first transistor Q1 and a second transistor Q2;

3. The Type-C PD one-driving-two charging circuit according to claim 1, further comprising a third transistor Q3 and a first inductor L1;

4. The Type-C PD one-driving-two charging circuit of claim 3, further comprising a fourth transistor Q4;

5. The Type-C PD one-drive-two charging circuit of claim 3, further comprising a second resistor R2 and a third resistor R3;

6. The Type-C PD one-for-two charging circuit of claim 4, wherein the microprocessor chip U4 includes a first chip pin, a second chip pin, a third chip pin, a fourth chip pin MCUC, a fifth chip pin MCUL, a sixth chip pin, a seventh chip pin, and an eighth chip pin;

7. The Type-C PD one-drive-two charging circuit of claim 3, wherein the switch control module U2 comprises a first input pin, a second input pin, a third output pin, a fourth output pin, a fifth output pin, and a sixth output pin;

8. The Type-C PD one-for-two charging circuit of claim 6, further comprising a fourth resistor R4 and a fifth resistor R5;

9. The Type-C PD one-driving-two charging circuit according to claim 1, wherein said second and third connection terminals are adapted to connect to a charging output interface;

10. A Type-cpd one-to-two charging wire comprising the Type-cpd one-to-two charging circuit of any of claims 1-9.