Power supply multipath output circuit

Abstract

The utility model relates to the technical field of power adapters, in particular to a multi-path output circuit of a power supply, which comprises an MCU (Microprogrammed Control Unit) main control module, an AC-DC (Alternating Current-Direct Current) conversion module, a DC-DC (Direct Current-Direct Current) conversion module, at least two switch modules and at least two output modules, the MCU main control module is respectively and electrically connected with the DC-DC conversion module, the AC-DC conversion module and the at least two switch modules, the AC-DC conversion module is respectively and electrically connected with the DC-DC conversion module and the at least two switch modules, and the power utilization efficiency and the output flexibility of the power adapter are improved by utilizing the technical scheme of converting the single-path DC-DC conversion module into double output ports.

Description

Technical Field

[0001] The utility model relates to the technical field of power adapters, in particular to a power multi-channel output circuit. Background Art

[0002] Existing power adapter designs typically employ dual output ports (e.g., two Type-C ports, or one Type-C port and one USB-A port) to achieve multiple power outputs. These power adapters typically employ a single AC-DC converter circuit to provide a fixed maximum output voltage (e.g., DC 20V). These circuits then output the required rated voltage (e.g., 5V to 20V) to two or more output ports via two or more DC-DC converter circuits. An MCU or protocol IC controls the power distribution between each output port and the power-demanding device, enabling multi-protocol voltage and current output capabilities. However, this architecture requires secondary power conversion in the DC-DC converter circuit when using a single output port, resulting in a 5-2% efficiency loss, reducing efficiency. This low efficiency can lead to significant heat generation, which in turn contributes to a significant greenhouse effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a power multi-channel output circuit, which can improve the power utilization efficiency and output flexibility of the power adapter.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A power multi-output circuit includes an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules, and at least two output modules, wherein each switch module is electrically connected to each output module, the MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module, and the at least two switch modules, and the AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules.

[0006] Furthermore, each of the switch modules includes two MOS tubes electrically connected to each other, both of the MOS tubes are electrically connected to the MCU main control module and the output module, one of the two MOS tubes is electrically connected to the DC-DC conversion module, and the other of the two MOS tubes is electrically connected to the AC-DC conversion module.

[0007] Furthermore, the number of the switch modules and the output modules are both two, the two MOS transistors in one of the two switch modules are MOS transistor Q1 and MOS transistor Q2, the two MOS transistors in the other of the two switch modules are MOS transistor Q3 and MOS transistor Q4, and the two output modules are connected to the first output module and the second output module respectively;

[0008] The MCU main control module is electrically connected to the source of the MOS transistor Q1, the gate of the MOS transistor Q1, the source of the MOS transistor Q2, the gate of the MOS transistor Q2, the drain of the MOS transistor Q3, the gate of the MOS transistor Q3, the gate of the MOS transistor Q4, the DC-DC conversion module, and the AC-DC conversion module, respectively. The drain of the MOS transistor Q1 is electrically connected to the DC-DC conversion module, the drain of the MOS transistor Q2, the source of the MOS transistor Q3, and the first output module, respectively. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4 and the second output module, and the drain of the MOS transistor Q4 is electrically connected to the drain of the MOS transistor Q3.

[0009] Furthermore, a resistor R11 is included, one end of the resistor R11 is electrically connected to the gate of the MOS transistor Q2 and the source of the MOS transistor Q2, respectively, and the other end of the resistor R11 is electrically connected to the MCU main control module.

[0010] Furthermore, a resistor R1 is included, one end of which is electrically connected to the gate of the MOS tube Q4 and the MCU main control module, and the other end of which is electrically connected to the drain of the MOS tube Q2 and the second output module.

[0011] Furthermore, a resistor R3 is included, one end of which is electrically connected to the source of the MOS transistor Q3, the drain of the MOS transistor Q1 and the first output module respectively, and the other end of the resistor R3 is electrically connected to the MCU main control module.

[0012] Furthermore, the first output module includes a connector J2 with six pins, the first pin of the connector J2 is electrically connected to the drain of the MOS transistor Q1 and the source of the MOS transistor Q3, respectively, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J2 are all electrically connected to the MCU main control module, and the sixth pin of the connector J2 is grounded.

[0013] Furthermore, the second output module includes a connector J3 with six pins, the first pin of the connector J3 is electrically connected to the drain of the MOS transistor Q2 and the source of the MOS transistor Q4, respectively, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J3 are all electrically connected to the MCU main control module, and the sixth pin of the connector J3 is grounded.

[0014] Furthermore, the MCU main control module includes a chip U2, the model of the chip U2 is IP2738, the twenty-seventh pin of the chip U2 is electrically connected to the source of the MOS tube Q1, the twenty-eighth pin of the chip U2 is electrically connected to the gate of the MOS tube Q1, the twenty-fifth pin of the chip U2 is electrically connected to the source of the MOS tube Q2 and the gate of the MOS tube Q2, respectively, the 30th pin of the chip U2 is electrically connected to the gate of the MOS tube Q3, the 26th pin of the chip U2 is electrically connected to the gate of the MOS tube Q4, the 13th pin, the 14th pin, the 19th pin, the 20th pin, the 21st pin and the 22nd pin of the chip U2 are all electrically connected to the first output module, and the 11th pin, the 12th pin, the 15th pin, the 16th pin, the 17th pin and the 18th pin of the chip U2 are all electrically connected to the second output module.

[0015] The beneficial effects of the present invention are:

[0016] This solution is provided with an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules and at least two output modules. One switch module is electrically connected to one output module. The MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module and the at least two switch modules respectively. The AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules respectively. In the single-port output mode, when a single output port requires the rated maximum voltage and current, the MCU main control module activates the bypass switch module of the DC-DC conversion module to directly connect the input and output, thereby reducing the secondary step-down of the DC-DC conversion module in the traditional solution. loss; in the dual-port output state, the main output port first provides the maximum rated voltage and current through the bypass switch module of the DC-DC conversion module. When the auxiliary output port is inserted into the device, the MCU main control module controls the auxiliary output port to enter the step-down mode of the DC-DC conversion module to output the required rated power; at the same time, the MCU main control module will automatically adjust the output voltage and current of the main output port to ensure that the total output power does not exceed the rated power of the input power supply. This mode realizes the flexible allocation and effective utilization of power when the dual ports work at the same time; the multi-channel output circuit of the power supply designed in this scheme uses the technical solution of converting a single-channel DC-DC conversion module to a dual output port to improve the power utilization efficiency and output flexibility of the power adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a connection block diagram of the power multi-channel output circuit of the utility model;

[0018] Figure 2This is a circuit schematic diagram of the switch module, the first output module, and the second output module of the power multi-channel output circuit of the utility model;

[0019] Figure 3 This is a circuit schematic diagram of the AC-DC conversion module and the MCU main control module of the power multi-channel output circuit of the utility model;

[0020] Figure 4 This is a circuit schematic diagram of a DC-DC conversion module of a power multi-output circuit of the present utility model;

[0021] Description of labels:

[0022] 1. MCU main control module; 2. AC-DC conversion module; 3. DC-DC conversion module; 4. Switch module; 5. First output module; 6. Second output module. DETAILED DESCRIPTION

[0023] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0024] Please refer to Figure 1 , the technical solution adopted by this utility model is:

[0025] A power multi-output circuit includes an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules, and at least two output modules, wherein each switch module is electrically connected to each output module, the MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module, and the at least two switch modules, and the AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules.

[0026] From the above description, it can be seen that the beneficial effects of the present invention are:

[0027] This solution is provided with an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules and at least two output modules. One switch module is electrically connected to one output module. The MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module and the at least two switch modules respectively. The AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules respectively. In the single-port output mode, when a single output port requires the rated maximum voltage and current, the MCU main control module activates the bypass switch module of the DC-DC conversion module to directly connect the input and output, thereby reducing the secondary step-down of the DC-DC conversion module in the traditional solution. loss; in the dual-port output state, the main output port first provides the maximum rated voltage and current through the bypass switch module of the DC-DC conversion module. When the auxiliary output port is inserted into the device, the MCU main control module controls the auxiliary output port to enter the step-down mode of the DC-DC conversion module to output the required rated power; at the same time, the MCU main control module will automatically adjust the output voltage and current of the main output port to ensure that the total output power does not exceed the rated power of the input power supply. This mode realizes the flexible allocation and effective utilization of power when the dual ports work at the same time; the multi-channel output circuit of the power supply designed in this scheme uses the technical solution of converting a single-channel DC-DC conversion module to a dual output port to improve the power utilization efficiency and output flexibility of the power adapter.

[0028] Furthermore, each of the switch modules includes two MOS tubes electrically connected to each other, both of the MOS tubes are electrically connected to the MCU main control module and the output module, one of the two MOS tubes is electrically connected to the DC-DC conversion module, and the other of the two MOS tubes is electrically connected to the AC-DC conversion module.

[0029] Furthermore, the number of the switch modules and the output modules are both two, the two MOS transistors in one of the two switch modules are MOS transistor Q1 and MOS transistor Q2, the two MOS transistors in the other of the two switch modules are MOS transistor Q3 and MOS transistor Q4, and the two output modules are connected to the first output module and the second output module respectively;

[0030] The MCU main control module is electrically connected to the source of the MOS transistor Q1, the gate of the MOS transistor Q1, the source of the MOS transistor Q2, the gate of the MOS transistor Q2, the drain of the MOS transistor Q3, the gate of the MOS transistor Q3, the gate of the MOS transistor Q4, the DC-DC conversion module, and the AC-DC conversion module, respectively. The drain of the MOS transistor Q1 is electrically connected to the DC-DC conversion module, the drain of the MOS transistor Q2, the source of the MOS transistor Q3, and the first output module, respectively. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4 and the second output module, and the drain of the MOS transistor Q4 is electrically connected to the drain of the MOS transistor Q3.

[0031] As can be seen from the above description, when channel A (i.e., the first output module) or channel B (i.e., the second output module) is used alone, the DC-DC conversion module does not work, the main current is directly output through MOS transistor Q3 or MOS transistor Q4, and MOS transistor Q1 or MOS transistor Q2 is turned off to prevent voltage backflow; this eliminates power loss from secondary conversion; the MCU main control module connects the gates of MOS transistors Q3 and Q4 to control the opening and closing of their drain and source electrodes;

[0032] When channel A (i.e., the first output module) and channel B (i.e., the second output module) are used at the same time, the MCU main control module will detect the channel with a high power demand or a high voltage requested by the device and directly pass the output of the AC-DC converter module to the terminal through MOS tube Q3 or MOS tube Q4. The output voltage adjustment will directly control the output voltage of the AC-DC converter module through the MCU main control module; the output of the other channel will output the voltage requested by the device end through the DC-DC converter module to meet the fast charging requirements of the device.

[0033] Furthermore, a resistor R11 is included, one end of the resistor R11 is electrically connected to the gate of the MOS transistor Q2 and the source of the MOS transistor Q2, respectively, and the other end of the resistor R11 is electrically connected to the MCU main control module.

[0034] As can be seen from the above description, the resistor R11 is provided to quickly release the voltage on the gate of the MOS transistor Q2 when the MOS transistor Q2 is turned off, thereby achieving rapid shutdown.

[0035] Furthermore, a resistor R1 is included, one end of which is electrically connected to the gate of the MOS tube Q4 and the MCU main control module, and the other end of which is electrically connected to the drain of the MOS tube Q2 and the second output module.

[0036] As can be seen from the above description, the resistor R1 is provided to quickly release the voltage on the gate of the MOS transistor Q4 when the MOS transistor Q4 is turned off, thereby achieving rapid shutdown.

[0037] Furthermore, a resistor R3 is included, one end of which is electrically connected to the source of the MOS transistor Q3, the drain of the MOS transistor Q1 and the first output module respectively, and the other end of the resistor R3 is electrically connected to the MCU main control module.

[0038] As can be seen from the above description, the resistor R3 is provided to quickly release the voltage on the gate of the MOS transistor Q3 when the MOS transistor Q3 is turned off, thereby achieving rapid shutdown.

[0039] Furthermore, the first output module includes a connector J2 with six pins, the first pin of the connector J2 is electrically connected to the drain of the MOS transistor Q1 and the source of the MOS transistor Q3, respectively, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J2 are all electrically connected to the MCU main control module, and the sixth pin of the connector J2 is grounded.

[0040] Furthermore, the second output module includes a connector J3 with six pins, the first pin of the connector J3 is electrically connected to the drain of the MOS transistor Q2 and the source of the MOS transistor Q4, respectively, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J3 are all electrically connected to the MCU main control module, and the sixth pin of the connector J3 is grounded.

[0041] Furthermore, the MCU main control module includes a chip U2, the model of the chip U2 is IP2738, the twenty-seventh pin of the chip U2 is electrically connected to the source of the MOS tube Q1, the twenty-eighth pin of the chip U2 is electrically connected to the gate of the MOS tube Q1, the twenty-fifth pin of the chip U2 is electrically connected to the source of the MOS tube Q2 and the gate of the MOS tube Q2, respectively, the 30th pin of the chip U2 is electrically connected to the gate of the MOS tube Q3, the 26th pin of the chip U2 is electrically connected to the gate of the MOS tube Q4, the 13th pin, the 14th pin, the 19th pin, the 20th pin, the 21st pin and the 22nd pin of the chip U2 are all electrically connected to the first output module, and the 11th pin, the 12th pin, the 15th pin, the 16th pin, the 17th pin and the 18th pin of the chip U2 are all electrically connected to the second output module.

[0042] Please refer to Figures 1 to 4 As shown, the first embodiment of the present utility model is:

[0043] Please refer to Figure 1 , a power multi-output circuit, including an MCU main control module 1, an AC-DC conversion module 2 (for specific structure, please refer to Figure 3), a DC-DC conversion module 3, at least two switch modules 4 and at least two output modules, one switch module 4 is electrically connected to one output module, the MCU main control module 1 is electrically connected to the DC-DC conversion module 3, the AC-DC conversion module 2 and at least two switch modules 4, and the AC-DC conversion module 2 is electrically connected to the DC-DC conversion module 3 and at least two switch modules 4.

[0044] Please refer to Figure 1 Each of the switch modules 4 includes two MOS transistors electrically connected to each other, both of the MOS transistors are electrically connected to the MCU main control module 1 and the output module, one of the two MOS transistors is electrically connected to the DC-DC conversion module 3, and the other of the two MOS transistors is electrically connected to the AC-DC conversion module 2.

[0045] Please refer to Figure 2 , the number of the switch modules 4 and the output modules are both two, the two MOS transistors in one of the two switch modules 4 are MOS transistor Q1 and MOS transistor Q2, the two MOS transistors in the other of the two switch modules 4 are MOS transistor Q3 and MOS transistor Q4, and the two output modules are respectively connected to the first output module 5 and the second output module 6;

[0046] Please refer to Figure 2 The MCU main control module 1 is electrically connected to the source of the MOS transistor Q1, the gate of the MOS transistor Q1, the source of the MOS transistor Q2, the gate of the MOS transistor Q2, the drain of the MOS transistor Q3, the gate of the MOS transistor Q3, the gate of the MOS transistor Q4, the DC-DC conversion module 3, and the AC-DC conversion module 2, respectively. The drain of the MOS transistor Q1 is electrically connected to the DC-DC conversion module 3, the drain of the MOS transistor Q2, the source of the MOS transistor Q3, and the first output module 5, respectively. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4 and the second output module 6, respectively. The drain of the MOS transistor Q4 is electrically connected to the drain of the MOS transistor Q3.

[0047] Please refer to Figure 2 , further comprising a resistor R11, one end of the resistor R11 being electrically connected to the gate of the MOS transistor Q2 and the source of the MOS transistor Q2, respectively, and the other end of the resistor R11 being electrically connected to the MCU main control module 1.

[0048] Please refer to Figure 2 , further comprising a resistor R1, one end of the resistor R1 being electrically connected to the gate of the MOS tube Q4 and the MCU main control module 1, and the other end of the resistor R1 being electrically connected to the drain of the MOS tube Q2 and the second output module 6.

[0049] Please refer to Figure 2 , and also includes a resistor R3, one end of which is electrically connected to the source of the MOS tube Q3, the drain of the MOS tube Q1 and the first output module 5, and the other end of the resistor R3 is electrically connected to the MCU main control module 1.

[0050] The MOS transistor Q1 and the MOS transistor Q2 are both dual N-channel MOS transistors, and the MOS transistor Q3 and the MOS transistor Q4 are both single N-channel MOS transistors.

[0051] Please refer to Figure 2 The first output module 5 includes a connector J2 with six pins, the first pin of the connector J2 is electrically connected to the drain of the MOS transistor Q1 and the source of the MOS transistor Q3, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J2 are all electrically connected to the MCU main control module 1, and the sixth pin of the connector J2 is grounded.

[0052] Please refer to Figure 2 The first output module 5 also includes a resistor R6, one end of the resistor R6 is electrically connected to the sixth pin of the connector J2 and the MCU main control module 1 respectively, the other end of the resistor R6 is electrically connected to the MCU main control module 1, and the other end of the resistor R6 is grounded; the accurate current of the output port is detected by the resistor R6 for overcurrent protection and short circuit protection of the port.

[0053] Please refer to Figure 2 The second output module 6 includes a connector J3 with six pins, the first pin of the connector J3 is electrically connected to the drain of the MOS transistor Q2 and the source of the MOS transistor Q4, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the connector J3 are all electrically connected to the MCU main control module 1, and the sixth pin of the connector J3 is grounded.

[0054] Please refer to Figure 2 The second output module 6 also includes a resistor R12, one end of the resistor R12 is electrically connected to the sixth pin of the connector J3 and the MCU main control module 1 respectively, the other end of the resistor R12 is electrically connected to the MCU main control module 1, and the other end of the resistor R12 is grounded; the accurate current of the output port is detected by the resistor R12 for overcurrent protection and short circuit protection of the port.

[0055] Please refer to Figure 3The MCU main control module 1 includes a chip U2, the model of which is IP2738. The twenty-seventh pin of the chip U2 is electrically connected to the source of the MOS transistor Q1, the twenty-eighth pin of the chip U2 is electrically connected to the gate of the MOS transistor Q1, the twenty-fifth pin of the chip U2 is electrically connected to the source of the MOS transistor Q2 and the gate of the MOS transistor Q2, respectively, the 30th pin of the chip U2 is electrically connected to the gate of the MOS transistor Q3, and the 26th pin of the chip U2 is electrically connected to the gate of the MOS transistor Q4. The 13th, 14th, 19th, 20th, 21st and 22nd pins of the chip U2 are all electrically connected to the first output module 5, and the 11th, 12th, 15th, 16th, 17th and 18th pins of the chip U2 are all electrically connected to the second output module 6.

[0056] The DC-DC conversion module 3 includes capacitor C10, capacitor C6, capacitor C7, capacitor C11, resistor R9, capacitor C15, resistor R13, resistor R2, capacitor C1, capacitor C16, inductor L1, capacitor C9, resistor R5, capacitor C2, capacitor C3, capacitor C4, capacitor C5, resistor R10, capacitor C16 and chip U1. For the specific connection relationship between the various components, please refer to Figure 2 、 Figure 3 and Figure 4 Chip U1 is a DC step-down IC with a 100% duty cycle and built-in switch MOS and synchronous rectifier MOS. Capacitors C10, C6, C7, and C11 are connected between the first and second, third, fourth, and sixth pins of chip U1 to act as input filters. Resistor R9 is a pull-up resistor for the fifth pin (control pin) of chip U1. When the fifth pin of chip U1 is high, the DC-DC converter module 3 works normally and has output. When the fifth pin of chip U1 is low, the DC-DC converter module 3 is shut down and has no output. Capacitor C15 is connected from the tenth pin of chip U1 to ground to store energy and filter the LDO output inside chip U1. Capacitor C16 is connected from the tenth pin of chip U1 to ground to store energy and filter the LDO output inside chip U1. Between the third pin and the ground line is the setting for the soft-start time of the IC; capacitors C2 and C1 are connected in series between the ninth and eighth pins of chip U1, providing power energy to the internal MOS tube driver through the eighth pin of chip U1; resistors R5, R10, and capacitor C9 are connected from Vout to ground, and the middle node in the series connection is connected to the twelfth pin of chip U1 to control and adjust the output voltage of the DC-DC conversion module 3; inductor L1 is an energy storage power inductor; capacitors C2, C3, C4, and C5 are output filter capacitors to ensure the stability of the output voltage.

[0057] The MCU master module 1 further comprises a capacitor C8, a resistor R7, a resistor R23, a capacitor C16, a resistor R71, a resistor R27, a capacitor C18, a resistor R25, a resistor R8 and a resistor R4, and the specific connection relationship between each component can be referred to Figure 2 , Figure 3 and Figure 4 ; when the first output module (i.e. port one) or the second output module (i.e. port two) outputs independently, the chip U2 controls the MOS tube Q2 or the MOS tube Q1 to directly output the output of the AC-DC conversion module 2 to the port through the twenty-fifth pin or the twenty-eighth pin of the chip U2; the fourth pin of the chip U2 is connected to the fifth pin of the chip U1 to control the DC-DC conversion module 3 to be turned off; only when the double ports work simultaneously (with equipment), the DC-DC conversion module 3 is controlled to work and output; the port with large power is directly output by the MOS tube Q1 or the MOS tube Q2 through the AC-DC conversion module 2; the port with small power is turned on by the MOS tube Q3 or the MOS tube Q4 to turn on the output of the DC-DC conversion module 3; for example, the port one is inserted into a computer or other equipment with large power, and the MOS tube Q1 is turned on and the MOS tube Q3 is turned off; the MOS tube Q2 is turned off and the MOS tube Q4 is turned on for the port two, so that independent fast charging output can be realized.

[0058] The power supply multi-output circuit designed in the scheme is input by a single power supply, and the technical scheme of converting a single DC-DC conversion module 3 into a double output port is used to improve the power utilization efficiency and output flexibility of the power adapter;

[0059] Single-port output mode: when a single output port requires the highest rated voltage and current (for example, DC 20V / 5A), the chip U2 activates the bypass MOS tube of the DC-DC conversion module 3 to directly conduct the input and output, thereby reducing the secondary voltage reduction loss of the DC-DC conversion module 3 in the traditional scheme.

[0060] Double-port dynamic power distribution mode: in the state of double-port output, the main output port first provides the maximum rated voltage and current (for example, DC 20V / 5A) through the bypass MOS tube of the DC-DC conversion module 3; when the auxiliary output port is inserted into equipment, the chip U2 controls the auxiliary output port to enter the step-down mode of the DC-DC conversion module 3 to output the required rated power (for example, 9V / 2.22A 20W); at the same time, the chip U2 also automatically adjusts the output voltage and current of the main output port (for example, adjusted to DC 20V / 3.25A 65W) to ensure that the total output power does not exceed the rated power of the input power supply; this mode realizes flexible distribution and effective utilization of power in the case of simultaneous work of double ports.

[0061] Automatic priority voltage distribution mechanism: Chip U2 also has the function of automatically distributing power according to the voltage requirements of the output port. The system will prioritize the port with higher voltage requirements as the main output port to meet its high power requirements, while the auxiliary output port will be adaptively adjusted according to the remaining power. This mechanism ensures that each port can work stably and efficiently in complex power usage scenarios.

[0062] In summary, the utility model provides a power multi-channel output circuit, which is provided by setting an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules and at least two output modules. One switch module is electrically connected to one output module, and the MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module and the at least two switch modules respectively. The AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules respectively. In the single-port output mode, when a single output port requires the rated maximum voltage and current, the MCU main control module activates the bypass switch module of the DC-DC conversion module to directly connect the input and output, thereby reducing the DC-DC in the traditional solution. C conversion module's secondary step-down loss; in the dual-port output state, the main output port first provides the maximum rated voltage and current through the bypass switch module of the DC-DC conversion module. When the auxiliary output port is plugged into the device, the MCU main control module controls the auxiliary output port to enter the step-down mode of the DC-DC conversion module to output the required rated power; at the same time, the MCU main control module will automatically adjust the output voltage and current of the main output port to ensure that the total output power does not exceed the rated power of the input power supply. This mode realizes the flexible allocation and effective utilization of power when the dual ports work at the same time; the power multi-channel output circuit designed in this scheme uses the technical solution of converting a single-channel DC-DC conversion module to a dual output port to improve the power utilization efficiency and output flexibility of the power adapter.

[0063] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A power multi-output circuit, characterized in that: It includes an MCU main control module, an AC-DC conversion module, a DC-DC conversion module, at least two switch modules and at least two output modules. One switch module is electrically connected to one output module. The MCU main control module is electrically connected to the DC-DC conversion module, the AC-DC conversion module and the at least two switch modules respectively. The AC-DC conversion module is electrically connected to the DC-DC conversion module and the at least two switch modules respectively.

2. The power multi-channel output circuit according to claim 1, characterized in that: Each of the switch modules includes two MOS transistors electrically connected to each other, both of the MOS transistors are electrically connected to the MCU main control module and the output module, one of the two MOS transistors is electrically connected to the DC-DC conversion module, and the other of the two MOS transistors is electrically connected to the AC-DC conversion module.

3. The power multi-channel output circuit according to claim 2, characterized in that: There are two switch modules and two output modules. The two MOS transistors in one of the two switch modules are MOS transistor Q1 and MOS transistor Q2. The two MOS transistors in the other of the two switch modules are MOS transistor Q3 and MOS transistor Q4. The two output modules are connected to the first output module and the second output module respectively. The MCU main control module is electrically connected to the source of the MOS transistor Q1, the gate of the MOS transistor Q1, the source of the MOS transistor Q2, the gate of the MOS transistor Q2, the drain of the MOS transistor Q3, the gate of the MOS transistor Q3, the gate of the MOS transistor Q4, the DC-DC conversion module, and the AC-DC conversion module, respectively. The drain of the MOS transistor Q1 is electrically connected to the DC-DC conversion module, the drain of the MOS transistor Q2, the source of the MOS transistor Q3, and the first output module, respectively. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4 and the second output module, and the drain of the MOS transistor Q4 is electrically connected to the drain of the MOS transistor Q3.

4. The power multi-output circuit according to claim 3, characterized in that: The device further includes a resistor R11 , one end of which is electrically connected to the gate of the MOS transistor Q2 and the source of the MOS transistor Q2 , respectively, and the other end of which is electrically connected to the MCU main control module.

5. The power multi-output circuit according to claim 3, characterized in that: It also includes a resistor R1, one end of which is electrically connected to the gate of the MOS tube Q4 and the MCU main control module, and the other end of which is electrically connected to the drain of the MOS tube Q2 and the second output module.

6. The power multi-output circuit according to claim 3, characterized in that: It also includes a resistor R3, one end of which is electrically connected to the source of the MOS transistor Q3, the drain of the MOS transistor Q1 and the first output module respectively, and the other end of the resistor R3 is electrically connected to the MCU main control module.

7. The power multi-output circuit according to claim 3, characterized in that: The MOS transistor Q1 and the MOS transistor Q2 are both dual N-channel MOS transistors, and the MOS transistor Q3 and the MOS transistor Q4 are both single N-channel MOS transistors.

8. The power multi-output circuit according to claim 3, wherein: The first output module includes a connector J2 having six pins. The first pin of the connector J2 is electrically connected to the drain of the MOS transistor Q1 and the source of the MOS transistor Q3, respectively. The second, third, fourth, fifth and sixth pins of the connector J2 are all electrically connected to the MCU main control module, and the sixth pin of the connector J2 is grounded.

9. The power multi-output circuit according to claim 3, characterized in that: The second output module includes a connector J3 with six pins. The first pin of the connector J3 is electrically connected to the drain of the MOS transistor Q2 and the source of the MOS transistor Q4, respectively. The second, third, fourth, fifth and sixth pins of the connector J3 are all electrically connected to the MCU main control module, and the sixth pin of the connector J3 is grounded.

10. The power multi-output circuit according to claim 3, characterized in that: The MCU main control module includes a chip U2, the model of which is IP2738. The twenty-seventh pin of the chip U2 is electrically connected to the source of the MOS tube Q1, the twenty-eighth pin of the chip U2 is electrically connected to the gate of the MOS tube Q1, the twenty-fifth pin of the chip U2 is electrically connected to the source of the MOS tube Q2 and the gate of the MOS tube Q2, respectively, the 30th pin of the chip U2 is electrically connected to the gate of the MOS tube Q3, the 26th pin of the chip U2 is electrically connected to the gate of the MOS tube Q4, the 13th pin, the 14th pin, the 19th pin, the 20th pin, the 21st pin and the 22nd pin of the chip U2 are all electrically connected to the first output module, and the 11th pin, the 12th pin, the 15th pin, the 16th pin, the 17th pin and the 18th pin of the chip U2 are all electrically connected to the second output module.

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