Charger with multipath output function

Abstract

The invention discloses a charger with a multi-path output function, the charger with the multi-path output function comprises a shell, a main power supply module, a plurality of output modules and a controller module, the main power supply module, the plurality of output modules and the controller module are all arranged in the shell, the shell is provided with a plurality of output ends, and the output ends are connected with the main power supply module. The port of each output module can be embedded into the corresponding output end to form a multi-path connection port, and the plurality of output modules are electrically connected with the main power supply module and the controller module respectively; the main power supply module is an AC / DC converter, each output module comprises a DC / DC converter and an output port, the input ends of the plurality of DC / DC converters are electrically connected with the output end of the AC / DC converter respectively, and the plurality of output ports are electrically connected with the output ends of the corresponding DC / DC converters respectively. The charger with the multi-path output function realizes the multi-path output function of the charger through a plurality of output modules electrically connected with the main power supply module and the controller module.

Description

Technical Field

[0001] The present invention relates to the technical field of chargers, and in particular to a charger with a multi-channel output function. Background Art

[0002] A charger is a device that converts a power source (such as AC or DC) into electrical energy suitable for use by a device. Its main function is to power a battery or directly an electronic device. A charger typically contains circuits for power conversion, regulation, and output protection. Specifically, the charger can convert the AC current provided by the power grid into a DC current suitable for the device and ensure that the output voltage and current meet the device's requirements. At the same time, for electrical safety, the charger includes overvoltage, overcurrent, overheating, and short-circuit protection to ensure the safety of the device and the charger. Currently, most chargers on the market are single-output chargers, which only have a charging device with a fixed output voltage and current, suitable for charging a single electronic device, such as a mobile phone, flashlight, or portable speaker. Existing chargers typically consist of an input short-circuit, power conversion circuit, output current, and protection circuit to output electrical energy to a single electrical device.

[0003] However, the above-mentioned single-output chargers have a single function and can only provide a fixed output voltage and current, which cannot adapt to the needs of different devices. At the same time, most single-output chargers only support a single interface and cannot support the simultaneous functions of multiple devices. Summary of the Invention

[0004] Based on this, it is necessary to provide a charger with multi-channel output function to address the technical problems of the existing single-channel output charger function and single interface.

[0005] A charger with a multi-channel output function includes a housing, a main power module, a plurality of output modules and a controller module. The main power module, the plurality of output modules and the controller module are all arranged inside the housing. The housing is provided with a plurality of output terminals, and the plurality of output terminals respectively correspond to the plurality of output modules one by one, so that the port of each output module can be embedded in the corresponding output terminal to form a multi-channel connection port. At the same time, the plurality of output modules are respectively electrically connected to the main power module and the controller module.

[0006] The main power module is configured as an AC / DC converter. Accordingly, each output module includes a DC / DC converter and an output port. The input ends of several DC / DC converters are electrically connected to the output ends of the AC / DC converters, and the output ports are electrically connected to the output ends of the corresponding DC / DC converters.

[0007] In one embodiment, the above-mentioned main power supply module includes an EMI filter unit, a rectifier unit and an LLC resonant circuit, the input end of the EMI filter unit is electrically connected to the AC power supply, the output end of the EMI filter unit is electrically connected to the input end of the rectifier unit, the output end of the rectifier unit is electrically connected to the input end of the LLC resonant circuit, and the output end of the LLC resonant circuit is electrically connected to a number of output modules.

[0008] In one embodiment, the DC / DC converter includes a step-down control chip and an output filter capacitor. The step-down control chip and the output filter capacitor are disposed between the AC / DC converter and the output port. Furthermore, the AC / DC converter, the step-down control chip, the output filter capacitor, and the output port are electrically connected in sequence.

[0009] In one embodiment, the output port includes a VBUS circuit, a USB interface control chip, and a communication circuit. The VBUS circuit and the USB interface control chip are arranged at the output end of the output filter capacitor, and the output filter capacitor, the VBUS circuit, and the USB interface control chip are electrically connected in sequence, so that the USB interface control chip of each output port outputs electrical energy through the USB interface; the communication circuit is arranged between the USB interface control chip and the controller module, so that the USB interface control chip is communicatively connected to the controller module through the communication circuit.

[0010] In one embodiment, the above-mentioned controller module is set to MCU, which includes a PWM module, a feedback signal acquisition module and a communication module. The PWM module is electrically connected to the step-down control chip, and the feedback signal acquisition module is communicatively connected to the communication circuit through the communication module.

[0011] In one embodiment, the buck control chip is provided with a switch circuit, and the switch circuit is electrically connected to the PWM module.

[0012] In one embodiment, the step-down control chip is MP24943.

[0013] In one embodiment, the USB interface control chip is STUSB4500, and each STUSB4500 is connected to a USB-C interface.

[0014] In one embodiment, the VBUS circuit is connected in series with an electronic switch and is in communication with the PWM module.

[0015] In one embodiment, the electronic switch is IRF4905.

[0016] In one embodiment, a TVS diode is connected in parallel between the VBUS circuit and GND.

[0017] In one embodiment, the TVS diode is SMBJ15CA.

[0018] In one embodiment, the MCU is STM32G071.

[0019] In one embodiment, the output voltage signal of the above-mentioned output port is sampled through the voltage divider resistor network of the feedback signal acquisition module and transmitted to the ADC channel of the MCU; the current signal of the output port is converted by the sampling resistor and the differential amplifier and transmitted to the ADC channel of the MCU.

[0020] In one embodiment, the MCU can be connected to a PC via a UART interface.

[0021] The aforementioned charger with multiple outputs achieves this functionality through a number of output modules electrically connected to a main power module and a controller module. The main power module is configured as an AC / DC converter, and accordingly, each output module includes a DC / DC converter and an output port. The inputs of the DC / DC converters are electrically connected to the outputs of the AC / DC converters, and the output ports are electrically connected to the outputs of the corresponding DC / DC converters. Thus, the AC / DC converter can convert external AC power, such as mains electricity, into DC power of a preset voltage value, which is then transmitted to the DC / DC converters. Each DC / DC converter synchronously steps down the input main DC power to the required voltage value for each channel, ultimately outputting electrical energy to the device to be charged through the corresponding output port. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a charger with multi-output function in one embodiment; Figure 2 This is a schematic diagram of the exploded structure of a charger with multiple output functions in one embodiment; Figure 3 This is a schematic diagram of the exploded structure of a charger with multiple output functions in one embodiment; Figure 4 FIG. 1 is a schematic diagram of a partial structure of a charger with multi-channel output function in one embodiment. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] See also Figures 1 to 4 The present invention discloses a charger with a multi-channel output function, which includes a housing 100, a main power module 200, a plurality of output modules 300 and a controller module 400. The main power module 200, the plurality of output modules 300 and the controller module 400 are all arranged inside the housing 100, wherein the housing 100 is provided with a plurality of output terminals 110, and the plurality of output terminals 110 respectively correspond to the plurality of output modules 300 one-to-one, so that the port of each output module 300 can be embedded in the corresponding output terminal 110 to form a multi-channel connection port. At the same time, the plurality of output modules 300 are respectively electrically connected to the main power module 200 and the controller module 400, thereby realizing the multi-channel output function of the charger. Specifically, the main power module 200 is configured as an AC / DC converter. Accordingly, each output module 300 includes a DC / DC converter 310 and an output port 320. The input ends of several DC / DC converters 310 are respectively electrically connected to the output ends 110 of the AC / DC converter, and the output ports 320 are respectively electrically connected to the output ends 110 of the corresponding DC / DC converters 310. Thus, the AC / DC converter can convert external input alternating current, such as mains power, into direct current with a preset voltage value and then transmit power to the several DC / DC converters 310. Each DC / DC converter 310 synchronously steps down the input main direct current to the required voltage value of each line, and finally outputs electrical energy to the device to be charged through the corresponding output port 320. More specifically, the main power module 200 includes an EMI filter unit 210, a rectifier unit 220 and an LLC resonant circuit 230. The input end of the EMI filter unit 210 is electrically connected to the AC power supply, the output end 110 of the EMI filter unit 210 is electrically connected to the input end of the rectifier unit 220, the output end 110 of the rectifier unit 220 is electrically connected to the input end of the LLC resonant circuit 230, and the output end 110 of the LLC resonant circuit 230 is electrically connected to a number of output modules 300, thereby completing the AC / DC conversion, filtering, rectification and shunting of the input voltage.

[0030] Furthermore, the DC / DC converter 310 includes a step-down control chip 311 and an output filter capacitor 312. The step-down control chip 311 and the output filter capacitor 312 are arranged between the AC / DC converter and the output port 320. In addition, the AC / DC converter, the step-down control chip 311, the output filter capacitor 312 and the output port 320 are electrically connected in sequence. Therefore, each output connection port can reduce the output voltage to a preset voltage value through the corresponding step-down control chip 311 and perform filtering through the output filter capacitor 312 to reduce high-frequency ripple at the input end.

[0031] Furthermore, the output port 320 includes a VBUS circuit 321, a USB interface control chip 322, and a communication circuit 323. The VBUS circuit 321 and the USB interface control chip 322 are arranged at the output end 110 of the output filter capacitor 312, and the output filter capacitor 312, the VBUS circuit 321, and the USB interface control chip 322 are electrically connected in sequence. Therefore, the USB interface control chip 322 of each output port 320 outputs electrical energy through the USB interface, thereby forming a multi-channel output of the charger, wherein the VBUS circuit 321 is directly powered by the output filter capacitor 312 and detects and identifies the connected device of the USB interface control chip 322; the communication circuit 323 is arranged between the USB interface control chip 322 and the controller module 400, so that the USB interface control chip 322 is communicatively connected to the controller module 400 via the communication circuit 323, and the controller module 400 dynamically adjusts the output voltage of the USB interface control chip 322.

[0032] Furthermore, the controller module 400 is configured as an MCU, which includes a PWM module 410, a feedback signal acquisition module 420, and a communication module 430. The PWM module 410 is electrically connected to the step-down control chip 311, and the feedback signal acquisition module 420 is communicatively connected to the communication circuit 323 via the communication module 430. Thus, the PWM module 410 controls the duty cycle of the DC / DC converter 310. The communication module 430 is communicatively connected to the communication circuit 323 of the multiple output ports 320 via I²C. Furthermore, the feedback signal acquisition module 420 collects the current and voltage signals output by the multiple output ports 320 via the communication module 430.

[0033] In one embodiment, the buck control chip 311 is provided with a switch circuit 3111 , which is electrically connected to the PWM module 410 . Thus, the PWM module 410 controls the duty cycle of the switch circuit 3111 , thereby achieving switching control of the DC / DC converter 310 .

[0034] In one embodiment, the step-down control chip 311 uses MP24943 to support an input range of 6V-60V.

[0035] In one embodiment, the USB interface control chip 322 uses STUSB4500, and each STUSB4500 is connected to a USB-C interface for power output.

[0036] In one embodiment, the VBUS circuit 321 is connected in series with an electronic switch 3211 . Specifically, the electronic switch 3211 uses IRF4905 and is in communication with the PWM module 410 . The MCU controls the electronic switch 3211 to disconnect or connect the output.

[0037] In one embodiment, a TVS diode 3212 is connected in parallel between the VBUS circuit 321 and GND to absorb high voltage spikes. Specifically, the TVS diode 3212 is SMBJ15CA.

[0038] In one embodiment, the MCU uses STM32G071 to integrate USB-PD library and multi-channel PWM control functions.

[0039] In one embodiment, the output voltage signal of the output port 320 is sampled by the voltage divider resistor network of the feedback signal acquisition module 420 and transmitted to the ADC channel of the MCU; the current signal of the output port 320 is converted by the sampling resistor and the differential amplifier and transmitted to the ADC channel of the MCU.

[0040] In one embodiment, the MCU can be connected to a PC via a UART interface for firmware upgrade and debugging.

[0041] In summary, the charger with multiple output functions disclosed herein achieves this function through a number of output modules electrically connected to a main power module and a controller module. The main power module is configured as an AC / DC converter, and accordingly, each output module includes a DC / DC converter and an output port. The input terminals of the DC / DC converters are electrically connected to the output terminals of the AC / DC converters, and the output ports are electrically connected to the output terminals of the corresponding DC / DC converters. Thus, the AC / DC converter can convert external input AC power, such as mains electricity, into DC power with a preset voltage value, which is then transmitted to the DC / DC converters. Each DC / DC converter synchronously steps down the input main DC power to the voltage required for each channel, ultimately outputting electrical energy to the device to be charged through the corresponding output port.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A charger with multi-channel output function, characterized in that: include: A housing, a main power module, a plurality of output modules and a controller module, wherein the main power module, the plurality of output modules and the controller module are all arranged inside the housing, wherein the housing is provided with a plurality of output terminals, and the plurality of output terminals are respectively matched with the plurality of output modules in a one-to-one correspondence, so that the port of each output module can be embedded in the corresponding output terminal to form a multi-way connection port, and at the same time, the plurality of output modules are respectively electrically connected with the main power module and the controller module; The main power module is configured as an AC / DC converter. Accordingly, each output module includes a DC / DC converter and an output port. The input ends of several DC / DC converters are electrically connected to the output ends of the AC / DC converters, and the output ports are electrically connected to the output ends of the corresponding DC / DC converters.

2. The charger with multiple output functions according to claim 1, characterized in that: The main power supply module includes an EMI filter unit, a rectifier unit and an LLC resonant circuit. The input end of the EMI filter unit is electrically connected to the AC power supply, the output end of the EMI filter unit is electrically connected to the input end of the rectifier unit, the output end of the rectifier unit is electrically connected to the input end of the LLC resonant circuit, and the output end of the LLC resonant circuit is electrically connected to a number of output modules.

3. The charger with multiple output functions according to claim 2, characterized in that: The DC / DC converter includes a buck control chip and an output filter capacitor, which are arranged between the AC / DC converter and the output port, and the AC / DC converter, the buck control chip, the output filter capacitor and the output port are electrically connected in sequence.

4. The charger with multiple output function according to claim 3, characterized in that: The output port includes a VBUS circuit, a USB interface control chip and a communication circuit. The VBUS circuit and the USB interface control chip are arranged at the output end of the output filter capacitor, and the output filter capacitor, the VBUS circuit and the USB interface control chip are electrically connected in sequence, so that the USB interface control chip of each output port outputs electrical energy through the USB interface; The communication circuit is arranged between the USB interface control chip and the controller module, so that the USB interface control chip is communicatively connected with the controller module through the communication circuit.

5. The charger with multiple output functions according to claim 4, characterized in that: The controller module is set as MCU, which includes a PWM module, a feedback signal acquisition module and a communication module. The PWM module is electrically connected to the buck control chip, and the feedback signal acquisition module is communicatively connected to the communication circuit through the communication module.

6. The charger with multiple output functions according to claim 5, characterized in that: The step-down control chip is provided with a switch circuit, and the switch circuit is electrically connected to the PWM module.

7. The charger with multiple output functions according to claim 6, characterized in that: The step-down control chip uses MP24943.

8. The charger with multiple output functions according to claim 7, characterized in that: The USB interface control chip uses STUSB4500, and each STUSB4500 is connected to a USB-C interface.

9. The charger with multiple output functions according to claim 8, characterized in that: The VBUS circuit is connected in series with an electronic switch and is in communication connection with the PWM module.

10. The charger with multiple output functions according to claim 9, characterized in that: The MCU used is STM32G071.

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