CN205004816U - Intelligent charging ware and control circuit charges thereof - Google Patents

Abstract

The utility model relates to a charging control circuit of an intelligent charger, comprising a load detection circuit, a voltage input circuit, a control circuit and a charging circuit; the load detection circuit is used for detecting the charging protocol type of a load connected to the intelligent charger Identify and generate a feedback signal according to the identified charging protocol type; the voltage input circuit is used for the user to input and adjust the voltage value; the control circuit is used for receiving the feedback signal and the adjusted voltage value and according to the feedback signal or the adjusted voltage value generates a voltage control signal; the charging circuit is used to adjust the input voltage according to the voltage control signal to form an output voltage to charge the load. The above-mentioned charging control circuit of the smart charger not only meets the power supply requirements of common equipment, but also meets the power consumption requirements of specific loads, and has good compatibility. The utility model also relates to an intelligent charger.

Description

Smart Charger and Its Charging Control Circuit

technical field

The utility model relates to the technical field of power supplies, in particular to an intelligent charger, and also relates to a charging control circuit of the intelligent charger.

Background technique

Traditional chargers can only output a single voltage, and different electronic devices may have different voltage requirements, so each needs to be equipped with a charger for charging, and the compatibility of the charger is poor.

Utility model content

Based on this, it is necessary to provide a charging control circuit of an intelligent charger with better compatibility.

A charging control circuit of an intelligent charger, comprising a load detection circuit, a voltage input circuit, a control circuit and a charging circuit; the load detection circuit is used to detect and identify the charging protocol type of the load connected to the intelligent charger, and according to The identified charging protocol type generates a feedback signal; the voltage input circuit is used for the user to input and adjust the voltage value; the control circuit is respectively connected with the load detection circuit, the voltage input circuit and the charging circuit; the The control circuit is used to receive the feedback signal and the adjusted voltage value and generate a voltage control signal according to the feedback signal or the adjusted voltage value; the charging circuit is used to adjust the input voltage according to the voltage control signal Form the output voltage to charge the load.

In one of the embodiments, the load detection circuit includes at least two IC chips of different charging protocol specifications; the IC chips of the at least two different charging protocol specifications communicate with the load sequentially through signal lines; the IC chip according to the The voltage and current values fed back by the load confirm whether the protocol type of the load matches the protocol type of the IC chip, and when matched, generate a feedback signal and output it to the control circuit.

In one of the embodiments, the IC chips of the at least two different charging protocol specifications include at least one IC chip of the general charging protocol specification and at least one IC chip of the non-universal charging protocol specification; the IC chip of the non-universal charging protocol specification The chip communicates with the load prior to the IC chip specified by the universal charging protocol.

In one of the embodiments, the IC chip of the general charging protocol specification includes at least one of the IC chip of the TYPE-C charging protocol specification, the IC chip of the QC charging protocol specification, and the IC chip of the BC charging protocol specification; The IC chip specified by the non-universal charging protocol includes the IC chip specified by the Samsung charging protocol or the IC chip specified by the Apple charging protocol.

In one of the embodiments, the charging circuit includes a feedback circuit, a PWM drive circuit, a transformer and rectifier circuit, and a current setting circuit; the control circuit includes a voltage control signal output terminal; The signal output terminal is connected to the PWM drive circuit; the feedback circuit is used to generate a feedback voltage to the PWM drive circuit according to the voltage control signal; the PWM drive circuit is used to adjust the input voltage according to the feedback voltage and then output; the transformer and rectifier circuit is used to transform and rectify the voltage output by the PWM drive circuit and output it to the load; the current setting circuit is used to adjust the output current according to the feedback signal to Outputting a charging current that matches the charging protocol type of the load.

In one of the embodiments, the feedback circuit includes first to fourth resistors, voltage regulator tubes, a first capacitor, and a photocoupler; one end of the first resistor is connected to the output end of the transformer rectifier circuit, the connected to the third resistor; the other end of the first resistor is connected to the second resistor and the output terminal of the voltage control signal respectively; the other end of the second resistor is grounded; the third resistor is not connected to the One end connected with the first resistance is also connected with the positive pole of the light generator of the photocoupler; the negative pole of the light generator of the photocoupler is connected with the negative pole of the voltage regulator tube; the control of the voltage regulator tube The terminal is connected in series with the fourth resistor and the first capacitor to the output terminal of the voltage control signal; the positive electrode of the voltage regulator tube is grounded; the optical receiver of the photocoupler is connected to the PWM drive circuit .

In one of the embodiments, the charging circuit further includes an auxiliary power supply circuit; the auxiliary power supply circuit is used to supply power to the PWM driving circuit.

In one of the embodiments, the charging circuit further includes a degaussing circuit; the degaussing circuit is arranged between the PWM driving circuit and the transformer rectifying circuit for eliminating electromagnetic interference.

In one of the embodiments, it also includes a current detection circuit, a voltage detection circuit and a display circuit; the current detection circuit, the voltage detection circuit and the display circuit are respectively connected to the control circuit; to detect the output current and output it to the control circuit; the voltage detection circuit is used to detect the output voltage and output it to the control circuit; the control circuit is used to detect the output voltage according to the output current, the The output circuit calculates and obtains the output power, and controls the display circuit to display the output current, output voltage and output power.

A smart charger is also provided.

An intelligent charger, comprising an input interface, an output interface, a voltage input device, and a printed circuit board; the printed circuit board is provided with the charging control circuit as described in any of the preceding embodiments; the load detection of the charging control circuit The circuit is connected to the output interface; the voltage input circuit of the charging control circuit is connected to the voltage input device; the charging circuit of the charging control circuit is connected to the input interface.

The load detection circuit in the smart charger and its charging control circuit can detect and identify the protocol type of the load connected to the smart charger and form a feedback signal to output to the control circuit. According to the feedback signal, the control circuit can control the charging circuit so as to output a voltage that matches the charging protocol type of the load to charge the load to meet the power consumption requirements of different loads. Moreover, the above-mentioned intelligent charger and its charging control circuit are also provided with a voltage input circuit, so that the user can input and adjust the voltage value. The control circuit can control the charging circuit according to the input regulated voltage value so as to output a specific voltage to charge the load, so that in addition to meeting the power supply requirements of general common equipment, it can also meet the power consumption requirements of specific loads, and the compatibility is good.

Description of drawings

Fig. 1 is a schematic structural diagram of an intelligent charger in an embodiment;

Fig. 2 is a structural block diagram of a charging control circuit in an embodiment;

Fig. 3 is a schematic structural diagram of a smart charger in another embodiment;

Fig. 4 is a structural block diagram of the charging control circuit in the smart charger in Fig. 3;

Fig. 5 is a structural block diagram of the charging circuit in Fig. 4;

FIG. 6 is a schematic circuit diagram of the charging control circuit in FIG. 4 .

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

An intelligent charger, the output voltage of which can be set flexibly or manually, so as to meet the power consumption requirements of loads with different voltage requirements, and has better compatibility. In this embodiment, the load may be electronic equipment such as a mobile phone, a tablet, a power bank, a digital camera, and a notebook computer. 1 is a schematic structural diagram of a smart charger 100 in an embodiment. The smart charger 100 includes a body 110, an input interface 120 disposed on the surface of the body 110, an output interface 130 and a voltage input device 140, and a voltage input device 140 disposed on the body 110. inside the printed circuit board (not visible in the picture).

The body 110 is made of insulating material. The input interface 120 is used to connect with the power supply, so as to receive the DC or AC power outputted by the power supply. In this embodiment, the input interface 120 may be directly connected to the mains. The output interface 130 is used to connect with the load through the data line, so as to supply power to the load. Both the input interface 120 and the output interface 130 can be common interface types in this field, such as USB-A interface, USB-C interface, Micro-USB interface and Lighting interface. The voltage input device 140 is disposed on the surface of the main body 110 so that the user can directly input and adjust the voltage value. In this embodiment, the voltage input device 140 is in the form of keys. Specifically, the voltage input device 140 includes a first button and a second button. The first button is used to increase the regulated voltage value, and the second button is used to decrease the regulated voltage value. In other embodiments, a touch screen may be used to input the adjusted voltage value.

A charging control circuit is arranged on the printed circuit board. FIG. 2 is a structural block diagram of a charging control circuit 200 in an embodiment. The charging control circuit 200 includes a load detection circuit 210 , a voltage input circuit 220 , a control circuit 230 and a charging circuit 240 . Wherein, the load detection circuit 210 , the voltage input circuit 220 , and the charging circuit 240 are respectively connected to the control circuit 230 .

The load detection circuit 210 is electrically connected to the output interface 130 , so as to be connected to the load connected to the smart charger 100 through the output interface 130 . The load detection circuit 210 is used to detect and identify the charging protocol type of the load, and generate a feedback signal according to the identified charging protocol type to output to the control circuit 230 . Different electronic devices may set different charging protocol types. Therefore, at least two IC chips with different charging protocol specifications are provided in the load detection circuit 210 . The IC chip is connected to the load through the signal line connected to its signal pin, and communicates with the load in turn when connected to the load. At least two IC chips with different charging protocol specifications should include at least one IC chip with a general charging protocol specification and one IC chip with a non-universal charging protocol specification. Moreover, the IC chip specified by the non-universal charging protocol has priority over the IC chip specified by the general charging protocol to communicate with the load, so as to ensure that the charger can also charge the load through the general charging protocol when the load does not use the non-universal charging protocol. to meet the power demand of the load. In this embodiment, the non-universal charging protocol specifications may include Samsung charging protocol specifications, Apple charging protocol specifications, and Qualcomm charging protocol specifications formulated by enterprises themselves and widely used. The general charging protocol specifications can include some international or national standards, such as TYPE-C charging protocol specifications, QC charging protocol specifications, and BC charging protocol specifications. In other embodiments, multiple IC chips may communicate with the load with the IC chip capable of implementing the charging protocol specification for fast charging prior to other IC chips, so as to confirm the charging protocol type of the load. The IC chip confirms whether the protocol type of the load matches the protocol type of the IC chip itself according to the voltage and current value fed back by the load. If so, it generates a feedback signal to the control signal, otherwise, the next IC chip will continue to communicate with the load to confirm the load. The charging protocol type. The feedback signal includes the charging protocol type information of the load.

The control circuit 230 will obtain the charging protocol information of the load according to the received feedback signal, and generate a voltage control signal to the charging circuit 240 to control the charging circuit 240 to output a voltage value (5V, 9V, 12V, 20V, etc.), to meet the charging needs of the load.

The voltage input circuit 220 is non-electrically connected with the voltage input device 140 , and is used to receive the adjusted voltage value input by the user through the voltage input device 140 and output it to the control circuit 230 . The adjusted voltage value can be configured as a target voltage or a target voltage increase range. When the charging type of the load cannot be identified by the load detection circuit 110 or the charging type of the load adopts the general charging protocol type in the load detection circuit 210 and cannot meet the power demand of the load, the user can input the adjusted voltage value through the voltage input device 140 . The control device 130 outputs a voltage control signal according to the adjusted voltage value, so as to control the charging circuit 140 to adjust the voltage input by the input interface 120 and output it to the load.

The load detection circuit 210 in the charging control circuit 200 of the smart charger 100 can detect and identify the protocol type of the connected load and form a feedback signal to output to the control circuit. According to the feedback signal, the control circuit 230 can control the charging circuit 240 so as to output a voltage matching the charging protocol type of the load to charge the load, so as to meet the power consumption requirements of different loads. Moreover, the charging control circuit 200 is further provided with a voltage input circuit 220, so that the user can input and adjust the voltage value. The control circuit 230 can control the charging circuit 140 according to the input regulated voltage value to output a specific voltage to charge the load, so that it can meet the power demand of a specific load in addition to the power supply demand of common equipment, and has good compatibility. .

Fig. 3 is a schematic structural diagram of a smart charger 300 in another embodiment, Fig. 4 is a structural block diagram of a charging control circuit 400 in a printed circuit board of the smart charger 300 in Fig. A structural block diagram of the charging circuit 440 , FIG. 6 is a schematic circuit diagram of the charging control circuit 400 in FIG. 4 . The smart charger 300 in this embodiment will be further described below with reference to FIGS. 3-6 .

In this embodiment, the smart charger 300 includes a main body 310 , an input interface 320 , an output interface 330 , a voltage input device 340 , a display screen 350 , and a printed circuit board (not visible in the figure) disposed inside the main body 310 . The parts that have been described in the foregoing embodiments will not be repeated here. A charging control circuit 400 is arranged on the printed circuit board for controlling the charging process.

The charging control circuit 400 includes a load detection circuit 410 , a voltage input circuit 420 , a control circuit 430 and a charging circuit 440 , and also includes a current detection circuit 450 , a voltage detection circuit 460 and a display circuit 470 .

The voltage input circuit 420 includes switches S1 and S2 connected to the microprocessor MCU. The switches S1 and S2 are opened and closed by a voltage input device (key) 340 provided on the surface of the main body 310 . The voltage accuracy of the two-button manual adjustment can be 0.01V, which is suitable for specific equipment. In order to avoid the key from being accidentally triggered during use, the manual input can only be triggered after the key is set to exceed a certain preset time.

In this embodiment, the charging circuit 440 includes a feedback circuit 610 , a PWM driving circuit 620 and a transformer rectification circuit 630 , as shown in FIG. 5 . The feedback circuit 610 is connected to the control circuit 430 and the PWM drive circuit 620 . The feedback circuit 610 is used for generating a feedback voltage to the PWM driving circuit 620 according to the voltage control signal output by the control circuit 430 . The PWM drive circuit 620 adjusts the voltage input from the input interface 320 according to the feedback voltage and then outputs it to the transformer rectification circuit 630 . The voltage transformation and rectification circuit 630 transforms and rectifies the voltage adjusted by the PWM driving circuit 620 and outputs it to the output interface 330 , so as to supply power to the connected load. In this embodiment, the charging circuit 440 is also provided with a current setting circuit. The current setting circuit is respectively connected to the output interface 330 and the load detection circuit 410, so as to adjust the output current of the output interface 330 according to the feedback signal generated by the load detection circuit 410, so that the output current matches the charging protocol type adopted by the load , so as to increase the output power, so that the load can obtain the fastest charging speed and realize the fast charging process.

Specifically, the control circuit 430 includes a microprocessor MCU and its peripheral circuits. The feedback circuit 610 includes a first resistor R13 , a second resistor R14 , a third resistor R11 , a fourth resistor R12 , a regulator tube D1 , a first capacitor C5 and an electric coupler. One end of the first resistor R13 is respectively connected to the output end of the transformer and rectifier circuit 630 and the third resistor R11 . The other end of the first resistor R13 is respectively connected to the second resistor R14 and the voltage control signal output terminal DA. The other end of the second resistor R14 is grounded. One end of the third resistor R11 not connected to the first resistor R13 is also connected to the anode of the light generator U1A of the photocoupler. The negative pole of the light generator U1A of the photocoupler is connected with the negative pole of the voltage regulator tube D1. The control terminal of the regulator tube D1 is connected in series with the fourth resistor R12 and the first capacitor C5 to the voltage control signal output terminal DA. The anode of the regulator tube D1 is grounded. The optical receiver U1B of the optocoupler is connected to the PWM driving circuit 620 .

In this embodiment, the voltage control signal is a voltage signal, and after being divided by the first resistor R13 and the second resistor R14 and isolated by the photocoupler, the feedback voltage is output to the PWM driving circuit 620 . The control chip U1 in the PWM driving circuit 620 controls the switching of its internal MOS transistor according to the feedback voltage, so as to realize the adjustment of the output voltage. The adjusted voltage is processed by the transformer T1, the filter capacitor C3 and the rectifier diode D2 to form a transformed and rectified current 630, and then output to the output interface J1 to supply power to the load. In this embodiment, the transformer rectification circuit 630 further includes a full-bridge rectification circuit D1 for rectifying the AC power input by the input interface 320 .

The charging circuit 440 also includes an auxiliary power supply circuit 640 and a degaussing circuit 650 . The auxiliary power supply circuit 640 is connected to the PWM driving circuit 620 to provide power for the control chip U1. The auxiliary power supply circuit 640 includes an auxiliary power supply (not shown in the figure) and a processing circuit for filtering (diode D4, capacitor C4) and sampling (resistor R7 and resistor R8) of the auxiliary voltage Vaux output by the auxiliary power supply. The PWM driving circuit 620 also monitors the sampling voltages of the resistors R7 and R8, so as to provide overvoltage protection when the auxiliary voltage Vaux is overvoltage. The degaussing circuit 650 is arranged between the PWM driving circuit 620 and the transformer rectifying circuit 630 for eliminating electromagnetic interference in the circuit. The degaussing circuit 650 includes a capacitor C2, a resistor R1 and a diode D3. After the capacitor C2 and the resistor R1 are connected in parallel, one end is connected to the transformer rectification circuit 630 , and the other end is connected to the cathode of the diode D3 . The anode of the diode D3 is connected to the output terminal of the PWM driving circuit 620 .

The current detection circuit 450 is connected with the input interface 330 and the control circuit 430 for detecting the output current and outputting it to the control circuit 430 . In this embodiment, the current detection circuit 450 also amplifies the detected output current and outputs it to the control circuit 430 to improve detection accuracy.

The voltage detection circuit 460 is respectively connected to the output end of the transformer rectification circuit 630 and the control circuit 430 . The voltage detection circuit 460 is used to detect the output current and output the output current to the control circuit 430 . In this embodiment, the voltage detection circuit 460 includes a resistor R2 and a resistor R3.

The control circuit 430 receives the detected output current and output voltage, and calculates the output power value according to the two. The control circuit 430 also controls the display circuit 470 to drive the display screen 350 to display the output current, output voltage and output power, so that the user can intuitively grasp the charging status, such as charging time and charging speed.

In this embodiment, the control circuit 430 controls the charging circuit 440 to output a standard voltage of 5V when the load detection circuit 410 does not detect a load, so as to ensure that any device that meets the USB interface standard can be charged normally when connected.

The smart charger 300 mentioned above can realize a wide range of voltage output through the control of the charging control circuit 400, and its output range is DC3.0V-30V. It has good compatibility with equipment, which can not only meet the power demand of special equipment, but also meet the specific voltage demand of specific equipment, and has good compatibility.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. a charging control circuit for intelligent charger, is characterized in that, comprises load detecting circuit, voltage input circuit, control circuit and charging circuit;

Described load detecting circuit is used for carrying out detection to the charge protocol type of the load of access intelligent charger and identifies, and generates feedback signal according to the charge protocol type recognized;

Described voltage input circuit is used for inputting regulation voltage level for user;

Described control circuit is connected with described load detecting circuit, described voltage input circuit and described charging circuit respectively; Described control circuit is for receiving described feedback signal and described regulation voltage level and according to described feedback signal or described regulation voltage level formation voltage control signal;

Described charging circuit is used for adjusting rear formation output voltage to described load charging according to described voltage control signal to input voltage.

2. the charging control circuit of intelligent charger according to claim 1, is characterized in that, described load detecting circuit comprises the IC chip of at least two different charge protocol specifications; The IC chip of described at least two different charge protocol specifications is communicated with load successively by holding wire; According to the voltage and current value of described load feedback, IC chip confirms whether the protocol type of described load mates with the protocol type of described IC chip, and generate feedback signal when mating and export to described control circuit.

3. the charging control circuit of intelligent charger according to claim 2, it is characterized in that, the IC chip of described at least two different charge protocol specifications comprises the IC chip of at least one general charge protocol specification and the IC chip of at least one non-universal charge protocol specification; The IC chip of described non-universal charge protocol specification communicates with described load prior to the IC chip of described general charge protocol specification.

4. the charging control circuit of intelligent charger according to claim 3, it is characterized in that, the IC chip of described general charge protocol specification comprises at least one in the IC chip of TYPE-C charge protocol specification, the IC chip of QC charge protocol specification and the IC chip of BC charge protocol specification; The IC chip of described non-universal charge protocol specification comprises the IC chip of Samsung charge protocol specification or the IC chip of apple charge protocol specification.

5. the charging control circuit of intelligent charger according to claim 1, is characterized in that, described charging circuit comprises feedback circuit, PWM drive circuit PWM drive circuit, Transformer Rectifier circuit and current setting circuit;

Described control circuit comprises voltage control signal output; Described feedback circuit is connected with described voltage control signal output, described PWM drive circuit respectively; Described feedback circuit is used for generating feedback voltage to described PWM drive circuit according to described voltage control signal; Described PWM drive circuit is used for adjusting rear output according to described feedback voltage to input voltage; Described Transformer Rectifier circuit exports to described load after being used for carrying out Transformer Rectifier to the voltage that described PWM drive circuit exports; Described current setting circuit is used for exporting the charging current with the charge protocol type matching of described load according to described feedback signal to output current adjustment.

6. the charging control circuit of intelligent charger according to claim 5, is characterized in that, described feedback circuit comprises first to fourth resistance, voltage-stabiliser tube, the first electric capacity, photoelectrical coupler; Described first resistance one end is connected with the output of described Transformer Rectifier circuit, described 3rd resistance respectively; The other end of described first resistance is connected with described second resistance, described voltage control signal output respectively; The other end ground connection of described second resistance; One end that described 3rd resistance is not connected with described first resistance is also connected with the positive pole of the optical generator of described photoelectrical coupler; The negative pole of the optical generator of described photoelectrical coupler is connected with the negative pole of described voltage-stabiliser tube; Be connected with described voltage control signal output after described 4th resistance of control end series connection of described voltage-stabiliser tube, described first electric capacity; The plus earth of described voltage-stabiliser tube; The optical receiver of described photoelectrical coupler is then connected with described PWM drive circuit.

7. the charging control circuit of intelligent charger according to claim 5, is characterized in that, described charging circuit also comprises auxiliary power circuit; Described auxiliary power circuit is used for powering to described PWM drive circuit.

8. the charging control circuit of intelligent charger according to claim 5, is characterized in that, described charging circuit also comprises degaussing circuit; Described degaussing circuit is arranged between described PWM drive circuit and described Transformer Rectifier circuit, for eliminating electromagnetic interference.

9. the charging control circuit of intelligent charger according to claim 1, is characterized in that, also comprises current detection circuit, voltage detecting circuit and display circuit; Described current detection circuit, described voltage detecting circuit and described display circuit are connected with described control circuit respectively;

Described current detection circuit is used for detecting output current, and exports to described control circuit;

Described voltage detecting circuit is used for detecting output voltage, and exports to described control circuit;

Described control circuit is used for calculating and obtaining power output according to described output current, described output circuit, and control described display circuit and show described output current, output voltage and power output.

10. an intelligent charger, is characterized in that, comprises input interface, output interface, voltage input device and printed circuit board (PCB); Described printed circuit board (PCB) is provided with the charging control circuit as described in any one of claim 1 ~ 9; The load detecting circuit of described charging control circuit is connected with described output interface; The voltage input circuit of described charging control circuit is connected with described voltage input device; The charging circuit of described charging control circuit is connected with described input interface.