A notebook computer fast charging power supply charger circuit

Abstract

The utility model relates to power supply charger circuit technical field, concretely is a kind of specially matched notebook computer fast charging power supply charger circuit, including commercial power input end, surge protection circuit, full-wave rectifier circuit, EMI filter electromagnetic anti-interference circuit, absorption loop and high-frequency transformer conversion circuit, integrated MOSFET tube driving device and PWM control circuit, synchronous rectification MOS circuit, synchronous rectification control circuit, main control IC and opto-coupler feedback loop circuit, wherein the input end of surge protection circuit is connected with commercial power input end, output end is connected with full-wave rectifier circuit, full-wave rectifier circuit is connected with EMI filter electromagnetic anti-interference circuit, absorption loop and high-frequency transformer conversion circuit are connected with EMI filter electromagnetic anti-interference circuit, integrated MOSFET tube driving device and PWM control circuit and synchronous rectification MOS circuit respectively, synchronous rectification MOS circuit is connected with synchronous rectification control circuit and main control IC respectively.The utility model's circuit design is reasonable, can realize fast charging, and can protect notebook computer simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of power charger circuit technology, specifically a fast charging power charger circuit for laptops. Background Technology

[0002] With the continuous development of electronic technology, laptops have become indispensable tools for modern office work, study, and entertainment. Most laptops are powered by AC voltage. Currently, laptop chargers on the market are generally designed for slow charging to protect the computer, but this is inconvenient for frequently used office laptops and cannot achieve fast charging. Therefore, it is necessary to design a dedicated fast-charging power supply circuit for laptops. This circuit can protect the laptop while enabling fast charging, meeting the needs of office users. Utility Model Content

[0003] The purpose of this invention is to provide a dedicated fast charging power supply and charger circuit for laptops. This circuit is reasonably designed, enabling fast charging while protecting the laptop, thus solving the problems raised in the background of the marketed technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dedicated fast-charging power supply charger circuit for laptops. This power supply charger circuit includes an AC input terminal, a surge protection circuit, a full-wave rectifier circuit, an EMI filter electromagnetic interference suppression circuit, an absorption circuit and a high-frequency transformer conversion circuit, an integrated MOSFET driver and PWM control circuit, a synchronous rectifier MOS circuit, a synchronous rectifier control circuit, a main control IC, and an optocoupler feedback loop circuit. The input terminal of the surge protection circuit is connected to the AC input terminal, and its output terminal is connected to the full-wave rectifier circuit. The end of the full-wave rectifier circuit furthest from the surge protection circuit is connected to the EMI filter electromagnetic interference suppression circuit. The absorption circuit and high-frequency transformer conversion circuit are respectively connected to the EMI filter electromagnetic interference suppression circuit, the integrated MOSFET driver and PWM control circuit, and the synchronous rectifier MOS circuit. The end of the synchronous rectifier MOS circuit furthest from the absorption circuit and high-frequency transformer conversion circuit is respectively connected to the synchronous rectifier control circuit and the main control IC. The optocoupler feedback loop circuit is respectively connected to the integrated MOSFET driver and PWM control circuit and the main control IC.

[0005] Preferably, the voltage input to the mains input terminal is 100-240V AC power.

[0006] Preferably, the surge protection circuit consists of a fuse F1, a common-mode inductor LF1, and a thermistor NTC1. One end of the fuse F1 is connected to the live wire of the mains input terminal, and the other end is connected to the common-mode inductor LF1. One end of the thermistor NTC1 is connected to the common-mode inductor LF1, and the other end is connected to the full-wave rectifier circuit.

[0007] Preferably, the full-wave rectifier circuit consists of a common-mode inductor LF2 and a capacitor CX1. One end of the common-mode inductor LF2 is connected to the surge protection circuit, and the other end is connected to the capacitor CX1. The end of the capacitor CX1 furthest from the common-mode inductor LF2 is connected to the EMI filter electromagnetic interference suppression circuit.

[0008] Preferably, the EMI filtering electromagnetic interference suppression circuit includes a rectifier bridge BD1, capacitors EC1, EC2, EC3, EC4, C4, and inductor L1. Capacitors EC1 and EC2 are connected in parallel, with one end grounded and the other end connected to inductor L1 and pin 1 of rectifier bridge BD1, respectively. Capacitors EC3, EC4, and C4 are connected in parallel, with one end grounded and the other end connected to inductor L1 and the absorption circuit connected to the high-frequency transformer conversion circuit. Pins 2 and 3 of rectifier bridge BD1 are connected to the full-wave rectifier circuit, and pin 4 is grounded.

[0009] Preferably, the absorption circuit and high-frequency transformer conversion circuit are composed of transformer T1A, resistors R1, R2, and R3, capacitor C1, capacitor C2A, and diode D1. Capacitor C1 and resistor R1 are connected in parallel, resistors R2 and R3 are connected in parallel, and capacitor C2A and diode D1 are connected in parallel. One end of capacitor C1 and resistor R1 is connected to the EMI filter electromagnetic interference suppression circuit and the primary coil of transformer T1A, and the other end is connected to resistors R2 and R3. The ends of resistors R2 and R3 furthest from capacitors C1 and R1 are connected to capacitor C2A and diode D1. The ends of capacitor C2A and diode D1 furthest from resistors R2 and R3 are respectively connected to the integrated MOSFET driver device and PWM control circuit and the primary coil of transformer T1A. The secondary coil of transformer T1A is connected to the synchronous rectification MOS circuit.

[0010] Preferably, the integrated MOSFET driver and PWM control circuit includes a PWM converter U1, capacitors C2, C3, C5, C7, C7A, C8, C10, and C15, resistors R6, R7, R8, R9, R10, R11, and R12, a thermistor NTC3, an inductor L2, diodes D2 and ZD1, a transformer T1B, and an optocoupler U3B. One end of capacitor C2 is connected to the power supply, and the other end is connected to both the PWM converter U1 and the high-frequency transformer conversion circuit. Resistors R11 and R12 are connected in parallel, with one end grounded and the other end connected to the PWM converter U1. One end of resistor R10 is connected to the thermistor NTC3, and the other end is connected to the PWM converter U1. The inductor L2 is connected to pin 27 of the PWM converter U1, and the other end is connected to capacitors C7, C8, C10, resistor R6, and diode D2. One end of capacitor C7A is connected to pin 28 of the PWM converter U1, and the other end is grounded. Capacitor C3, diode ZD1, and optocoupler U3B are connected in parallel, with one end of capacitor C3, diode ZD1, and optocoupler U3B grounded and the other end connected to pin 30 of the PWM converter U1. Resistor R9 and capacitor C15 are connected in parallel, with one end of resistor R9 and capacitor C15 grounded and the other end connected to resistor R8. The end of resistor R8 away from resistor R9 and capacitor C15 is connected to diode D2, capacitor C5, and resistor R7. One end of transformer T1B is grounded and the other end is connected to resistor R7.

[0011] Preferably, the synchronous rectification MOS circuit includes a MOS transistor Q1, a resistor R14, and a capacitor C9, wherein the resistor R14 and the capacitor C9 are connected in series and then in parallel with the MOS transistor Q1. The MOS transistor Q1 is also connected to the high-frequency transformer conversion circuit, the synchronous rectification control circuit, and the main control IC.

[0012] Preferably, the synchronous rectification control circuit includes resistor R15, resistor R17, capacitor C13, and synchronous rectification controller U2, wherein one end of capacitor C13 is connected to pin 4 of synchronous rectification controller U2, and the other end is connected to synchronous rectification MOS circuit; one end of resistor R17 is connected to synchronous rectification MOS circuit, and the other end is connected to pins 1 and 6 of synchronous rectification controller U2; the two ends of resistor R15 are connected to pins 2 and 3 of synchronous rectification controller U2, respectively.

[0013] Preferably, the optocoupler feedback loop circuit includes resistors R19, R20, R26, and R27, capacitors C11, C17, C18, C19, and C20, and an optocoupler U3A. Resistor R19 and capacitor C11 are connected in parallel; resistor R20 and optocoupler U3A are connected in parallel; resistor R27 and capacitor C20 are connected in series and then in parallel with capacitor C19; capacitor C18 and resistor R26 are connected in series and then in parallel with capacitor U3A. C17 is connected in parallel; one end of resistor R19 and capacitor C11 is connected to the power supply terminal, and the other end is connected to resistor R20 and optocoupler U3A; the ends of resistor R20 and optocoupler U3A away from resistor R19 and capacitor C11 are respectively connected to capacitor C17, capacitor C18, capacitor C19, and capacitor C20; the ends of capacitor C19, capacitor C17, resistor R26, and resistor R27 away from resistor R20 and optocoupler U3A are connected to the main control IC.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a dedicated fast charging power bank charger circuit for laptops. The fast charging power bank charger circuit includes a mains input terminal, a surge protection circuit, a full-wave rectification circuit, an EMI filtering and electromagnetic interference suppression circuit, an absorption circuit and high-frequency transformer conversion circuit, an integrated MOSFET driver and PWM control circuit, a synchronous rectification MOS circuit, a synchronous rectification control circuit, a main control IC, and an optocoupler feedback loop circuit. The mains power at the mains input terminal sequentially passes through the surge protection circuit, the full-wave rectification circuit, the EMI filtering and electromagnetic interference suppression circuit, the absorption circuit and high-frequency transformer conversion circuit, and the synchronous rectification MOS... The circuit, synchronous rectification control circuit, main control IC, optocoupler feedback loop circuit, and integrated MOSFET driver device and PWM control circuit perform a closed-loop process of surge protection, rectification, EMI filtering, high-frequency conversion, synchronous rectification, protocol control, and feedback voltage regulation. It achieves wide voltage input, high-efficiency rectification, intelligent protocol adaptation, and stable DC output to achieve fast charging. The main control IC is a protocol IC that can identify the power supply requirements of the connected device through its built-in PD protocol. It negotiates with the TPYE-C interface to intelligently adapt the power supply to the laptop, thereby protecting the laptop during charging. Attached Figure Description

[0015] Figure 1 This is a block diagram illustrating the principle of this utility model; Figure 2 This is the circuit schematic diagram of this utility model.

[0016] The reference numerals and names in the figure are as follows: 1. Mains input terminal; 2. Surge protection circuit; 3. Full-wave rectifier circuit; 4. EMI filter electromagnetic interference suppression circuit; 5. Absorption circuit and high-frequency transformer conversion circuit; 6. Integrated MOSFET driving device and PWM control circuit; 7. Synchronous rectification MOS circuit; 8. Synchronous rectification control circuit; 9. Main control IC; 10. Optocoupler feedback loop circuit. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0020] Please see Figure 1This utility model provides an embodiment of a dedicated fast-charging power supply charger circuit for laptops. The power supply charger circuit includes a mains input terminal 1, a surge protection circuit 2, a full-wave rectifier circuit 3, an EMI filter electromagnetic interference suppression circuit 4, an absorption circuit and a high-frequency transformer conversion circuit 5, an integrated MOSFET driver device and a PWM control circuit 6, a synchronous rectifier MOS circuit 7, a synchronous rectifier control circuit 8, a main control IC 9, and an optocoupler feedback loop circuit 10. The input terminal of the surge protection circuit 2 is connected to the mains input terminal 1, and its output terminal is connected to the full-wave rectifier circuit 3. The end of the full-wave rectifier circuit 3 furthest from the surge protection circuit 2 is connected to the EMI filter electromagnetic interference suppression circuit 4. The absorption circuit and the high-frequency transformer conversion circuit 5 are respectively connected to the EMI filter... The electromagnetic interference suppression circuit 4, the integrated MOSFET driver and PWM control circuit 6, and the synchronous rectification MOS circuit 7 are connected. The end of the synchronous rectification MOS circuit 7 away from the absorption circuit and the high-frequency transformer conversion circuit 5 is connected to the synchronous rectification control circuit 8 and the main control IC 9, respectively. The optocoupler feedback loop circuit 10 is connected to the integrated MOSFET driver and PWM control circuit 6 and the main control IC 9, respectively. The mains power undergoes a closed-loop process of surge suppression, rectification, EMI filtering, high-frequency conversion, synchronous rectification, protocol control, and feedback voltage regulation to achieve wide voltage input, high-efficiency rectification, intelligent protocol adaptation, and stable DC output, thereby achieving the purpose of fast charging. In this embodiment, the voltage input at the mains input terminal 1 is 100-240V AC power.

[0021] Please see Figure 2 The surge protection circuit 2 in the figure consists of a fuse F1, a common-mode inductor LF1, and a thermistor NTC1. One end of the fuse F1 is connected to the live wire of the mains input terminal 1, and the other end is connected to the common-mode inductor LF1. One end of the thermistor NTC1 is connected to the common-mode inductor LF1, and the other end is connected to the full-wave rectifier circuit 3. In this embodiment, the fuse F1 is a fuse that provides overcurrent protection, the common-mode inductor LF1 suppresses electromagnetic interference in the circuit, and the thermistor NTC1 suppresses and limits the surge current when the laptop is turned on, thereby ensuring the stable and safe operation of the subsequent circuits and meeting electromagnetic compatibility standards.

[0022] Specifically, the full-wave rectifier circuit 3 consists of a common-mode inductor LF2 and a capacitor CX1. One end of the common-mode inductor LF2 is connected to the thermistor NTC1 and the common-mode inductor LF1 on the surge protection circuit 2, and the other end is connected to the capacitor CX1. The end of the capacitor CX1 away from the common-mode inductor LF2 is connected to the EMI filter electromagnetic interference suppression circuit 4. In this embodiment, the capacitor CX1 is a common-mode filter capacitor used to suppress common-mode interference and can bypass common-mode noise to ground, reducing electromagnetic pollution to the laptop. The thermistor NTC1 is a negative temperature coefficient thermistor used to limit the instantaneous large current when the power is turned on. The common-mode inductor LF2 is used to suppress common-mode interference and works with the capacitor CX1 to suppress EMI suppression capability.

[0023] Specifically, the EMI filtering electromagnetic interference suppression circuit 4 includes a rectifier bridge BD1, capacitors EC1, EC2, EC3, EC4, C4, and inductor L1. Capacitors EC1 and EC2 are connected in parallel, with one end grounded and the other end connected to inductor L1 and pin 1 of rectifier bridge BD1, respectively. Capacitors EC3, EC4, and C4 are connected in parallel, with one end grounded and the other end connected to inductor L1 and the absorption circuit and high-frequency transformer conversion circuit 5. Pins 2 and 3 of rectifier bridge BD1 are connected to the full-wave rectifier circuit 3, and pin 4 is grounded. In this embodiment, rectifier bridge BD1 is a bridge rectifier composed of four diodes, converting AC to DC. Capacitors EC1, EC2, EC3, and EC4 are all large-capacity electrolytic capacitors used for filtering. Capacitor C4 assists in filtering. Inductor L1 utilizes the characteristic of inductors passing DC and blocking AC to impede sudden current changes, further suppressing voltage ripple and protecting the circuit.

[0024] Specifically, the absorption circuit and high-frequency transformer conversion circuit 5 are composed of transformer T1A, resistors R1, R2, and R3, capacitor C1, capacitor C2A, and diode D1. Capacitor C1 and resistor R1 are connected in parallel, resistors R2 and R3 are connected in parallel, and capacitor C2A and diode D1 are connected in parallel. One end of capacitor C1 and resistor R1 is connected to the EMI filter electromagnetic interference suppression circuit 4 and the primary coil of transformer T1A, and the other end is connected to resistors R2 and R3. The ends of resistors R2 and R3 furthest from capacitor C1 and resistor R1 are connected to capacitor C2A and diode D1. The ends of C2A and diode D1 away from resistors R2 and R3 are respectively connected to the integrated MOSFET driver and PWM control circuit 6 and the primary coil of transformer T1A. The secondary coil of transformer T1A is connected to the synchronous rectification MOS circuit 7. In this embodiment, transformer T1A is an isolation transformer, which provides electrical isolation and can also perform voltage transformation and signal coupling. Capacitor C1 performs filtering and decoupling. Resistors R1, R2, and R3 form a voltage divider circuit to provide a stable reference voltage for the subsequent circuit. Capacitor C2A and diode D1 form an RCD absorption circuit to suppress voltage spikes.

[0025] Specifically, the integrated MOSFET driver and PWM control circuit 6 includes a PWM converter U1, capacitors C2, C3, C5, C7, C7A, C8, C10, and C15, resistors R6, R7, R8, R9, R10, R11, and R12, a thermistor NTC3, an inductor L2, diodes D2 and ZD1, a transformer T1B, and an optocoupler U3B. One end of capacitor C2 is connected to the power supply, and the other end is connected to both the PWM converter U1 and the high-frequency transformer conversion circuit 5. Resistors R11 and R12 are connected in parallel, with one end grounded and the other end connected to the PWM converter U1. One end of resistor R10 is connected to the thermistor NTC3, and the other end is connected to pin 26 of the PWM converter U1. The inductor L2... One end of capacitor C7A is connected to pin 27 of PWM converter U1, and the other end is connected to capacitors C7, C8, C10, resistor R6, and diode D2. One end of capacitor C7A is connected to pin 28 of PWM converter U1, and the other end is grounded. Capacitor C3, diode ZD1, and optocoupler U3B are connected in parallel, with one end of capacitor C3, diode ZD1, and optocoupler U3B grounded and the other end connected to pin 30 of PWM converter U1. Resistor R9 and capacitor C15 are connected in parallel, with one end of resistor R9 and capacitor C15 grounded and the other end connected to resistor R8. The end of resistor R8 away from resistor R9 and capacitor C15 is connected to diode D2, capacitor C5, and resistor R7. One end of transformer T1B is grounded and the other end is connected to resistor R7. In this embodiment, the model of PWM converter U1 is SC3057.

[0026] Specifically, the synchronous rectification MOS circuit 7 includes a MOS transistor Q1, a resistor R14, and a capacitor C9. The resistor R14 and the capacitor C9 are connected in series and then in parallel with the MOS transistor Q1. The MOS transistor Q1 is also connected to the high-frequency transformer conversion circuit 5, the synchronous rectification control circuit 8, and the main control IC 9.

[0027] Specifically, the synchronous rectification control circuit 8 includes resistor R15, resistor R17, capacitor C13, and synchronous rectification controller U2. One end of capacitor C13 is connected to pin 4 of synchronous rectification controller U2, and the other end is connected to synchronous rectification MOS circuit 7. One end of resistor R17 is connected to synchronous rectification MOS circuit 7, and the other end is connected to pins 1 and 6 of synchronous rectification controller U2. The two ends of resistor R15 are connected to pins 2 and 3 of synchronous rectification controller U2, respectively. In this embodiment, the synchronous rectification controller U2 is model MK91806.

[0028] Specifically, the optocoupler feedback loop circuit 10 includes resistors R19, R20, R26, and R27, capacitors C11, C17, C18, C19, and C20, and an optocoupler U3A. Resistor R19 and capacitor C11 are connected in parallel; resistor R20 and optocoupler U3A are connected in parallel; resistor R27 and capacitor C20 are connected in series and then in parallel with capacitor C19; capacitor C18 and resistor R26 are connected in series and then in parallel with capacitor C17; resistor R... One end of capacitor C11 and resistor R20 are connected to the power supply terminal, and the other end is connected to resistor R20 and optocoupler U3A. The ends of resistor R20 and optocoupler U3A away from resistor R19 and capacitor C11 are connected to capacitors C17, C18, C19, and C20, respectively. The ends of capacitors C19 and C17, resistor R26 and resistor R27 away from resistor R20 and optocoupler U3A are connected to the main control IC9. In this embodiment, the upper-level model of optocoupler U3A is EL1018.

[0029] Please refer to it again. Figure 2 In this embodiment, the main control IC9 is a protocol IC. It can identify the power supply requirements of the access device through its built-in PD protocol, and intelligently adapt the power supply to the laptop through handshake negotiation via the TPYE-C interface. This can protect the laptop during charging and achieve fast charging. The preferred model of the main control IC9 is SW2325.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A circuit specifically designed for fast-charging power banks for laptops, characterized in that: The circuit includes a mains input terminal (1), a surge protection circuit (2), a full-wave rectifier circuit (3), an EMI filter electromagnetic interference suppression circuit (4), an absorption circuit and a high-frequency transformer conversion circuit (5), an integrated MOSFET driver and PWM control circuit (6), a synchronous rectifier MOS circuit (7), a synchronous rectifier control circuit (8), a main control IC (9), and an optocoupler feedback loop circuit (10). The input terminal of the surge protection circuit (2) is connected to the mains input terminal (1), and the output terminal is connected to the full-wave rectifier circuit (3). The end of the full-wave rectifier circuit (3) furthest from the surge protection circuit (2) is connected to the EMI filter electromagnetic interference suppression circuit (4). The electromagnetic interference filtering circuit (4) is connected, and the absorption circuit and the high-frequency transformer conversion circuit (5) are respectively connected to the EMI electromagnetic interference filtering circuit (4), the integrated MOSFET driving device and PWM control circuit (6) and the synchronous rectification MOS circuit (7). The end of the synchronous rectification MOS circuit (7) away from the absorption circuit and the high-frequency transformer conversion circuit (5) is respectively connected to the synchronous rectification control circuit (8) and the main control IC (9). The optocoupler feedback loop circuit (10) is respectively connected to the integrated MOSFET driving device and PWM control circuit (6) and the main control IC (9).

2. The dedicated fast-charging power supply and charger circuit for laptops according to claim 1, characterized in that: The voltage input to the mains input terminal (1) is 100-240V AC power.

3. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The surge protection circuit (2) consists of a fuse F1, a common-mode inductor LF1 and a thermistor NTC1. One end of the fuse F1 is connected to the live wire of the mains input terminal (1), and the other end is connected to the common-mode inductor LF1. One end of the thermistor NTC1 is connected to the common-mode inductor LF1, and the other end is connected to the full-wave rectifier circuit (3).

4. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The full-wave rectifier circuit (3) is composed of a common-mode inductor LF2 and a capacitor CX1. One end of the common-mode inductor LF2 is connected to the surge protection circuit (2), and the other end is connected to the capacitor CX1. The end of the capacitor CX1 away from the common-mode inductor LF2 is connected to the EMI filter electromagnetic interference suppression circuit (4).

5. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The EMI filtering electromagnetic interference suppression circuit (4) includes a rectifier bridge BD1, capacitors EC1, EC2, EC3, EC4, C4 and inductor L1. Among them, capacitors EC1 and EC2 are connected in parallel, and one end of capacitors EC1 and EC2 is grounded, while the other end is connected to inductor L1 and pin 1 of rectifier bridge BD1 respectively. Capacitors EC3, EC4 and C4 are connected in parallel, and one end of capacitors EC3, EC4 and C4 is grounded, while the other end is connected to inductor L1 and absorption circuit and high-frequency transformer conversion circuit (5). Pins 2 and 3 of rectifier bridge BD1 are connected to full-wave rectifier circuit (3), and pin 4 is grounded.

6. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The absorption circuit and high-frequency transformer conversion circuit (5) consists of transformer T1A, resistors R1, R2, and R3, capacitor C1, capacitor C2A, and diode D1. Capacitor C1 and resistor R1 are connected in parallel, resistors R2 and R3 are connected in parallel, and capacitor C2A and diode D1 are connected in parallel. One end of capacitor C1 and resistor R1 is connected to the EMI filter electromagnetic anti-interference circuit (4) and the primary coil of transformer T1A, and the other end is connected to resistors R2 and R3. The end of resistors R2 and R3 away from capacitors C1 and R1 is connected to capacitor C2A and diode D1. The end of capacitor C2A and diode D1 away from resistors R2 and R3 is connected to the integrated MOSFET driving device and PWM control circuit (6) and the primary coil of transformer T1A, respectively. The secondary coil of transformer T1A is connected to the synchronous rectification MOS circuit (7).

7. The dedicated fast-charging power supply and charger circuit for laptops according to claim 1, characterized in that: The integrated MOSFET driver and PWM control circuit (6) includes a PWM converter U1, capacitors C2, C3, C5, C7, C7A, C8, C10, and C15, resistors R6, R7, R8, R9, R10, R11, and R12, a thermistor NTC3, an inductor L2, a diode D2, a diode ZD1, a transformer T1B, and an optocoupler U3B. One end of capacitor C2 is connected to the power supply, and the other end is connected to the PWM converter U1 and the high-frequency transformer conversion circuit (5). Resistors R11 and R12 are connected in parallel, with one end grounded and the other end connected to the PWM converter U1. One end of resistor R10 is connected to the thermistor NTC3, and the other end is connected to the PWM converter U1. Pin 6 is connected; one end of inductor L2 is connected to pin 27 of PWM converter U1, and the other end is connected to capacitors C7, C8, C10, resistor R6, and diode D2 respectively; one end of capacitor C7A is connected to pin 28 of PWM converter U1, and the other end is grounded; capacitor C3, diode ZD1, and optocoupler U3B are connected in parallel, and one end of capacitor C3, diode ZD1, and optocoupler U3B is grounded, and the other end is connected to pin 30 of PWM converter U1; resistor R9 and capacitor C15 are connected in parallel, and one end of resistor R9 and capacitor C15 is grounded, and the other end is connected to resistor R8; the end of resistor R8 away from resistor R9 and capacitor C15 is connected to diode D2, capacitor C5, and resistor R7 respectively; one end of transformer T1B is grounded, and the other end is connected to resistor R7.

8. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The synchronous rectification MOS circuit (7) includes a MOS transistor Q1, a resistor R14 and a capacitor C9, wherein the resistor R14 and the capacitor C9 are connected in series and then in parallel with the MOS transistor Q1. The MOS transistor Q1 is also connected to the high-frequency transformer conversion circuit (5), the synchronous rectification control circuit (8) and the main control IC (9).

9. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The synchronous rectification control circuit (8) includes resistor R15, resistor R17, capacitor C13 and synchronous rectification controller U2. One end of capacitor C13 is connected to pin 4 of synchronous rectification controller U2, and the other end is connected to synchronous rectification MOS circuit (7). One end of resistor R17 is connected to synchronous rectification MOS circuit (7), and the other end is connected to pins 1 and 6 of synchronous rectification controller U2. The two ends of resistor R15 are connected to pins 2 and 3 of synchronous rectification controller U2, respectively.

10. The dedicated fast-charging power bank charger circuit for laptops according to claim 1, characterized in that: The optocoupler feedback loop circuit (10) includes resistors R19, R20, R26, and R27, capacitors C11, C17, C18, C19, and C20, and an optocoupler U3A. Resistor R19 and capacitor C11 are connected in parallel; resistor R20 and optocoupler U3A are connected in parallel; resistor R27 and capacitor C20 are connected in series and then in parallel with capacitor C19; capacitor C18 and resistor R26 are connected in series and then in parallel with capacitor C19.

7. Parallel connection; one end of resistor R19 and capacitor C11 is connected to the power supply terminal, and the other end is connected to resistor R20 and optocoupler U3A; the end of resistor R20 and optocoupler U3A away from resistor R19 and capacitor C11 is connected to capacitor C17, capacitor C18, capacitor C19, and capacitor C20 respectively; the end of capacitor C19, capacitor C17, resistor R26, and resistor R27 away from resistor R20 and optocoupler U3A is connected to the main control IC (9).

Images