CN214755607U

CN214755607U - A charger

Info

Publication number: CN214755607U
Application number: CN202120689972.1U
Authority: CN
Inventors: 周鹏程; 李丹丹
Original assignee: Shenzhen Guangyi Technology Innovation Co Ltd
Current assignee: Shenzhen Guangyi Technology Innovation Co Ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-16
Anticipated expiration: 2031-04-06

Abstract

The utility model relates to a charger technical field discloses a charger. The charger includes Type-c interface circuit, USB interface circuit, main control unit and power module, and main control unit is used for adjusting Type-c interface circuit and USB interface circuit's output according to Type-c interface circuit and USB interface circuit's interface current. The power supply module comprises a feedback circuit, the feedback circuit comprises a sampling circuit, a trigger circuit and a signal generating circuit, and the trigger circuit is used for generating a trigger signal when the sampling voltage of the sampling circuit is detected to be greater than a preset reference voltage; the signal generating circuit is used for generating a feedback signal according to the trigger signal, so that the control circuit adjusts the working state of the resonant circuit, therefore, the charger provided by the embodiment negatively feeds back to regulate the output voltage, the power supply for each circuit module is reliably and stably ensured, the output power of each interface circuit is also optimally distributed, and the charging efficiency is improved.

Description

A charger

Technical Field

The utility model relates to a charger technical field especially relates to a charger.

Background

With the development of a QC (Quick Charge) protocol and a PD (Power Delivery) protocol, more and more chargers can simultaneously carry the QC and PD protocols to meet the Quick Charge requirements of various charging interfaces, and a plurality of chargers appear in the existing market.

The multi-port charger can meet the simultaneous charging requirements of a plurality of charging devices, for example, one multi-port charger can meet the charging requirements of mobile devices such as mobile phones and notebook computers. With the increase of the charging load, the charger is also easy to have abnormal conditions such as overcurrent and overvoltage, and if the charger is not noticed, the charger is easy to be damaged by the abnormal conditions.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an embodiment of the utility model provides a charger, it can reliably provide the power steadily.

The embodiment of the utility model provides a solve its technical problem and adopt following technical scheme:

a charger, comprising:

a Type-c interface circuit;

a USB interface circuit;

the main controller is respectively electrically connected with the Type-c interface circuit and the USB interface circuit and is used for adjusting the output power of the Type-c interface circuit and the output power of the USB interface circuit according to the interface currents of the Type-c interface circuit and the USB interface circuit;

power module, respectively with Type-c interface circuit with USB interface circuit electricity is connected, is used for doing respectively Type-c interface circuit with USB interface circuit produces direct current voltage, power module includes resonant circuit, control circuit and feedback circuit, resonant circuit with the control circuit electricity is connected, wherein, feedback circuit includes:

the sampling circuit is electrically connected with the output end of the power supply module and is used for generating sampling voltage;

the trigger circuit is electrically connected with the sampling circuit and used for generating a trigger signal when the sampling voltage is detected to be greater than a preset reference voltage;

and the signal generating circuit is respectively electrically connected with the trigger circuit and the control circuit and is used for generating a feedback signal according to the trigger signal so that the control circuit responds to the feedback signal and adjusts the working state of the resonant circuit.

Optionally, the feedback circuit further comprises a first current limiting circuit electrically connected between the output of the power module and the signal generating circuit.

Optionally, the feedback circuit further includes a shunt branch electrically connected to two ends of the signal generating circuit.

Optionally, the feedback circuit further includes a dc blocking circuit, the dc blocking circuit is electrically connected between a first node and a second node, the first node is a sampling voltage output end of the sampling circuit, and the second node is a connection point between the signal generating circuit and the trigger circuit.

Optionally, the feedback circuit further comprises a second current limiting circuit electrically connected between the dc blocking circuit and the second node.

Optionally, the sampling circuit includes a first resistor and a second resistor, one end of the first resistor is electrically connected to the output terminal of the power module, the other end of the first resistor is electrically connected to one end of the second resistor and the trigger circuit, and the other end of the second resistor is grounded.

Optionally, the trigger circuit is a controllable precision voltage regulator, the controllable precision voltage regulator includes a cathode, an anode and a reference electrode, the cathode is electrically connected to the signal generating circuit, the anode is grounded, and the reference electrode is electrically connected to the other end of the first resistor.

Optionally, the signal generating circuit is an optocoupler.

Optionally, the optocoupler includes a primary side and a secondary side, an anode of the primary side is electrically connected to one end of the first resistor, a cathode of the primary side is electrically connected to the cathode, and two ends of the secondary side are electrically connected to the control circuit.

Optionally, the power module further includes a common mode filter circuit, a pre-stage rectifier circuit, a pi-type filter circuit, a post-stage rectifier circuit, and a post-stage filter circuit, the pre-stage rectifier circuit is electrically connected between the common mode filter circuit and the pi-type filter circuit, the pi-type filter circuit is electrically connected to the resonant circuit, the post-stage rectifier circuit is coupled to the resonant circuit, and the post-stage filter circuit is electrically connected to the post-stage rectifier circuit.

Compared with the prior art, in the utility model discloses in the charger, the charger includes Type-c interface circuit, USB interface circuit, main control unit and power module, and main control unit is connected with Type-c interface circuit and USB interface circuit electricity respectively for according to Type-c interface circuit and USB interface circuit's interface current, adjustment Type-c interface circuit and USB interface circuit's output. The power module is respectively electrically connected with the Type-c interface circuit and the USB interface circuit and is used for respectively generating direct-current voltage for the Type-c interface circuit and the USB interface circuit. The power supply module comprises a resonance circuit, a control circuit and a feedback circuit, wherein the resonance circuit is electrically connected with the control circuit, the feedback circuit comprises a sampling circuit, a trigger circuit and a signal generating circuit, and the sampling circuit is electrically connected with the output end of the power supply module and used for generating sampling voltage; the trigger circuit is electrically connected with the sampling circuit and used for generating a trigger signal when the detection sampling voltage is greater than the preset reference voltage; the signal generating circuit is electrically connected with the trigger circuit and the control circuit respectively and is used for generating a feedback signal according to the trigger signal so that the control circuit adjusts the working state of the resonant circuit. On the other hand, the charger provided by the embodiment can optimize and distribute the output power of each interface circuit, thereby ensuring that the power is utilized maximally and improving the charging efficiency.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic circuit block diagram of a charger according to an embodiment of the present invention;

FIG. 2a is a schematic block circuit diagram of the Type-c interface circuit shown in FIG. 1;

FIG. 2b is a schematic circuit diagram of the Type-c interface circuit shown in FIG. 1;

FIG. 3a is a schematic block circuit diagram of the USB interface circuit shown in FIG. 1;

FIG. 3b is a schematic circuit diagram of the USB interface circuit shown in FIG. 1;

FIG. 4 is a schematic circuit diagram of the main controller shown in FIG. 1;

FIG. 5 is a schematic block circuit diagram of the power module shown in FIG. 1;

FIG. 6 is a schematic circuit diagram of the power module shown in FIG. 1;

FIG. 7 is a schematic block circuit diagram of the feedback circuit shown in FIG. 5;

fig. 8 is a schematic circuit diagram of the feedback circuit shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "upper", "lower", "inner", "outer", "bottom", and the like as used herein are used in the description to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

An embodiment of the present invention provides a charger, please refer to fig. 1, the charger 100 includes a Type-c interface circuit 200, a USB interface circuit 300, a main controller 400 and a power module 500.

The Type-c interface circuit 200 is used to interface with an external device and transmit multimedia data, wherein the external device is any suitable electronic device, such as a notebook computer of any suitable Type.

It will be appreciated that the Type-c interface circuit 200 may support any suitable Type-c protocol and will not be described in detail herein.

In some embodiments, referring to fig. 2a and fig. 2b together, the Type-c interface circuit 200 includes a PD controller 21, a first signal conditioning circuit 22, a first current sampling circuit 23, and a Type-c interface 24, the PD controller 21 is electrically connected to the output terminal of the power module 500 and the first signal conditioning circuit 22 respectively, the first signal conditioning circuit 22 is electrically connected to the Type-c interface 24 through the first current sampling circuit 23, and the PD controller 21 is electrically connected to the first current sampling circuit 23.

The PD controller 21 is controlled by the main controller 400, and is configured to control the output power of the first signal conditioning circuit 22, and the output power of the first signal conditioning circuit 22 is transmitted to the Type-c interface 24 through the first current sampling circuit 23, and is output to the external device through the Type-c interface 24. The PD controller 21 samples the Type-c current through the first current sampling circuit 23, and the subsequent PD controller 21 performs serial port communication with the main controller 400, and may send the sampled Type-c current to the main controller 400, so that the main controller 400 executes corresponding power optimization allocation logic.

The USB interface circuit 300 is used for interfacing with an external device and transmitting multimedia data, and it is understood that the USB interface circuit 300 can support any suitable USB protocol, which is not described herein.

In some embodiments, referring to fig. 3a and fig. 3b together, the USB interface circuit 300 includes a USB controller 31, a second signal conditioning circuit 32, a second current sampling circuit 33 and a USB interface 34, the USB controller 31 is electrically connected to the output terminal of the power module 500 and the second signal conditioning circuit 32, the second signal conditioning circuit 32 is electrically connected to the USB interface 34 through the second current sampling circuit 33, and the USB controller 31 is electrically connected to the second current sampling circuit 33.

The USB controller 31 is controlled by the main controller 400, and is configured to control the output power of the second signal conditioning circuit 32, and the output power of the second signal conditioning circuit 32 is transmitted to the USB interface 34 through the second current sampling circuit 33, and is output to the external device through the USB interface 34. The USB controller 31 samples the USB current through the second current sampling circuit 33, and the subsequent USB controller 31 performs serial port communication with the main controller 400, and may send the sampled USB current to the main controller 400, so that the main controller 400 executes corresponding power optimization allocation logic.

Referring to fig. 4, the main controller 400 is electrically connected to the Type-c interface circuit 200 and the USB interface circuit 300, respectively, and is configured to adjust output powers of the Type-c interface circuit 200 and the USB interface circuit 300 according to interface currents of the Type-c interface circuit 200 and the USB interface circuit 300.

For example, when only the USB interface circuit 300 is plugged into an external device, the USB controller 31 controls the second signal conditioning circuit 32 to output the maximum power of 18W.

When the USB controller 31 transmits the sampled USB current to the host controller 400, the host controller 400 transmits the USB current to the PD controller 21, and the PD controller 21 detects that the USB current is less than 50 ma, the PD controller 21 controls the output power of the first signal conditioning circuit 22 to be 30W, that is, when only an external device is plugged into the Type-c interface circuit 200, the Type-c interface circuit 200 outputs 30W power.

When the USB controller 31 transmits the sampled USB current to the host controller 400, the host controller 400 transmits the USB current to the PD controller 21, and the PD controller 21 detects that the USB current is greater than 250 ma, the PD controller 21 controls the output power of the first signal conditioning circuit 22 to be 20W, that is, the Type-c interface circuit 200 is plugged into an external device, the USB interface circuit 300 is also plugged into the external device, the Type-c interface circuit 200 outputs 20W power, and the USB interface circuit 300 outputs 18W power.

When the USB current is between 50 milliamps and 250 milliamps, the PD controller 21 controls the output power of the first signal conditioning circuit 22 to remain unchanged.

The power module 500 is electrically connected to the Type-c interface circuit 200 and the USB interface circuit 300, respectively, for generating dc voltages for the Type-c interface circuit 200 and the USB interface circuit 300, respectively.

Referring to fig. 5 and fig. 6, the power module 500 includes a resonant circuit 51, a control circuit 52 and a feedback circuit 53, the resonant circuit 51 is electrically connected to the control circuit 52, and the control circuit 52 is used for controlling the resonant circuit 51 to generate a resonant voltage.

Referring to fig. 5, in some embodiments, the power module 500 further includes a common mode filter circuit 54, a pre-stage rectifier circuit 55, a pi-type filter circuit 56, a post-stage rectifier circuit 57, and a post-stage filter circuit 58, wherein the pre-stage rectifier circuit 55 is electrically connected between the common mode filter circuit 54 and the pi-type filter circuit 56, the pi-type filter circuit 56 is electrically connected to the resonant circuit 51, the post-stage rectifier circuit 57 is coupled to the resonant circuit 51, and the post-stage filter circuit 58 is electrically connected to the post-stage rectifier circuit 57.

The common mode filter circuit 54 may filter out the common mode signal so that the subsequent signal is more suitable for the scene of the electronic device. The pre-stage rectifying circuit 55 can rectify the ac mains into a dc signal, and the pi-type filter circuit 56 performs filtering processing on the dc signal, thereby obtaining a more beautiful dc signal containing less noise. The resonant circuit 51 converts the twice-filtered dc signal into a resonant signal under the control of the control circuit 52, and couples the resonant signal to the post-stage rectifying circuit 57 through a resonant inductor in the resonant circuit 51. The subsequent rectifying circuit 57 rectifies the ac resonant voltage transmitted from the resonant circuit 51 to obtain a dc voltage. The post-stage filter circuit 58 filters the dc voltage to output a dc voltage with a low harmonic coefficient, for example, 20 v.

In the present embodiment, the feedback circuit 53 includes a sampling circuit 531, a trigger circuit 532, and a signal generating circuit 533.

The sampling circuit 531 is electrically connected to the output terminal of the power module 500, and is configured to generate a sampling voltage, for example, the sampling circuit 531 samples a dc voltage output by the power module 500 to obtain a sampling voltage.

The trigger circuit 532 is electrically connected to the sampling circuit 531, and is configured to generate a trigger signal when the detected sampling voltage is greater than the preset reference voltage, and it can be understood that the trigger signal has various expressions, for example, the trigger signal is a low level signal.

The signal generating circuit 533 is electrically connected to the trigger circuit 532 and the control circuit 52, respectively, and configured to generate a feedback signal according to the trigger signal, so that the control circuit responds to the feedback signal to adjust the operating state of the resonant circuit 51, for example, when the dc voltage output by the power module 500 is too large, the sampling voltage is also too large, when the sampling voltage is greater than a preset reference voltage, the trigger circuit 532 generates the trigger signal, the trigger signal 532 causes the signal generating circuit 533 to generate the feedback signal, and the control circuit 52 receives the feedback signal, immediately performs reducing the amplitude of the ac voltage output by the resonant circuit 51, thereby effectively reducing the too large dc voltage.

In general, in one aspect, the charger 100 provided by the present embodiment can negatively feed back and regulate the output voltage, thereby ensuring reliable and stable power supply to each circuit module. On the other hand, the charger 100 provided in this embodiment can optimally distribute the output power of each interface circuit, thereby ensuring maximum power utilization and improving charging efficiency.

In some embodiments, referring to fig. 7, the feedback circuit 53 further includes a first current limiting circuit 534, and the first current limiting circuit 534 is electrically connected between the output terminal of the power module 500 and the signal generating circuit 533.

The first current limiting circuit 534 is used for limiting the current flowing through the signal generating circuit 533, so as to prevent the signal generating circuit 533 from being damaged due to the excessive current.

In some embodiments, with continued reference to fig. 7, the feedback circuit 53 further includes a shunt branch 535, and the shunt branch 535 is electrically connected to two ends of the signal generating circuit 533.

The shunt branch 535 is used for shunting the current flowing through the signal generating circuit 533, so as to further reduce the current flowing through the signal generating circuit 533.

In some embodiments, with continued reference to fig. 7, the feedback circuit 53 further includes a blocking circuit 536, the blocking circuit 536 is electrically connected between a first node 50a and a second node 50b, the first node 50a is a sampling voltage output terminal of the sampling circuit 531, and the second node 50b is a connection point of the signal generating circuit 533 and the trigger circuit 532.

The blocking circuit 536 is used to block the direct current, in this embodiment, the direct current output by the power module 500 is normally looped through the sampling circuit 531, but the signal generating circuit 533 and the trigger circuit 532 are not looped because the trigger circuit 532 is not functional. Further, the dc blocking circuit 536 blocks dc, and the signal generating circuit 533 and the dc blocking circuit 536 do not form a loop, so that the sampling circuit 531 can normally sample the dc voltage output from the power module 500. When the sampling voltage is greater than the preset reference voltage, the trigger circuit 532 is activated, and the signal generating circuit 533 and the trigger circuit 532 can form a loop, so that the signal generating circuit 533 generates the feedback signal according to the trigger signal.

In some embodiments, with continued reference to fig. 7, the feedback circuit 53 further includes a second current limiting circuit 537, the second current limiting circuit 537 being electrically connected between the dc blocking circuit 536 and the second node 50 b.

In some embodiments, referring to fig. 8, the sampling circuit 531 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is electrically connected to the output terminal of the power module 500, the other end of the first resistor R1 is electrically connected to one end of the second resistor R2 and the trigger circuit 532, and the other end of the second resistor R2 is grounded.

In some embodiments, referring to fig. 8, the triggering circuit 532 is a controllable precision regulator U0, the controllable precision regulator U0 includes a cathode, an anode and a reference electrode, the cathode is electrically connected to the signal generating circuit 533, the anode is grounded, and the reference electrode is electrically connected to the other end of the first resistor R1.

In some embodiments, referring to fig. 8, the signal generating circuit 533 is an optocoupler U1, and the optocoupler U1 can isolate strong current to reduce noise interference.

In some embodiments, with continued reference to fig. 8, the optocoupler U1 includes a primary side and a secondary side, the positive terminal of the primary side is electrically connected to one end of the first resistor R1, the negative terminal of the primary side is electrically connected to the cathode, and both ends of the secondary side are electrically connected to the control circuit 52.

In some embodiments, with continued reference to fig. 8, the first current limiting circuit 534 includes a third resistor R3, and the third resistor R3 is electrically connected between one end of the first resistor R1 and the positive electrode of the primary side.

In some embodiments, with continued reference to fig. 8, the shunt branch 535 includes a fourth resistor R4, the fourth resistor R4 being electrically connected across the primary side.

In some embodiments, with continued reference to fig. 8, the blocking circuit 536 includes a blocking capacitor C electrically connected between a first node 50a and a second node 50b, the first node 50a being a connection point of a first resistor R1 and a second resistor R2, and the second node 50b being a connection point of a negative electrode of the primary side and a cathode of the controlled precision regulator.

In some embodiments, with continued reference to fig. 8, the second current limiting circuit 537 comprises a fifth resistor R5, the fifth resistor R5 being electrically connected between the dc blocking capacitor C and the second node 50 b.

To elaborate on the working principle of the feedback circuit 53, this is explained in detail below with reference to fig. 8, as follows:

normally, the dc output from the power module 500 passes through the first resistor R1 and the second resistor R2 in sequence, and generates a sampling voltage at the first node 50 a. Because the sampling voltage at the moment is less than the preset reference voltage, the controllable precise voltage-stabilizing source is in a disconnected state, and under the action of the blocking capacitor C, the optocoupler and the controllable precise voltage-stabilizing source cannot form a loop originally, and the optocoupler cannot generate a feedback signal.

Under an abnormal condition, the direct current voltage output by the power module 500 is too large, so that the sampling voltage of the first node 50a is too large, the controllable precise voltage-stabilizing source is in a conducting state, the optical coupler originally forms a loop with the controllable precise voltage-stabilizing source, the optical coupler generates a feedback signal, and the control circuit reduces the amplitude of the alternating current voltage output by the resonance circuit 51 according to the feedback signal, so that the purpose of stably outputting the direct current voltage is achieved.

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; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art 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.

Claims

1. A charger, comprising:

a Type-c interface circuit;

a USB interface circuit;

2. The charger of claim 1, wherein the feedback circuit further comprises a first current limiting circuit electrically connected between the output of the power module and the signal generating circuit.

3. The charger of claim 2, wherein the feedback circuit further comprises a shunt branch electrically connected across the signal generating circuit.

4. The charger of claim 3, wherein the feedback circuit further comprises a dc blocking circuit electrically connected between a first node and a second node, the first node being a sampled voltage output of the sampling circuit, the second node being a connection point of the signal generating circuit and the trigger circuit.

5. The charger of claim 4, wherein the feedback circuit further comprises a second current limiting circuit electrically connected between the dc blocking circuit and the second node.

6. The charger according to any one of claims 1 to 5, wherein the sampling circuit comprises a first resistor and a second resistor, one end of the first resistor is electrically connected with the output end of the power supply module, the other end of the first resistor is electrically connected with one end of the second resistor and the trigger circuit respectively, and the other end of the second resistor is grounded.

7. The charger according to claim 6, wherein the trigger circuit is a controllable precision voltage regulator including a cathode, an anode and a reference electrode, the cathode is electrically connected to the signal generating circuit, the anode is grounded, and the reference electrode is electrically connected to the other end of the first resistor.

8. The charger of claim 7, wherein the signal generating circuit is an optocoupler.

9. The charger of claim 8, wherein the optocoupler includes a primary side and a secondary side, wherein a positive terminal of the primary side is electrically connected to one end of the first resistor, a negative terminal of the primary side is electrically connected to the cathode, and two ends of the secondary side are electrically connected to the control circuit.

10. The charger according to any one of claims 1 to 5, wherein the power module further comprises a common mode filter circuit, a pre-stage rectifier circuit, a pi-type filter circuit, a post-stage rectifier circuit and a post-stage filter circuit, the pre-stage rectifier circuit is electrically connected between the common mode filter circuit and the pi-type filter circuit, the pi-type filter circuit is electrically connected with the resonance circuit, the post-stage rectifier circuit is coupled with the resonance circuit, and the post-stage filter circuit is electrically connected with the post-stage rectifier circuit.