A timing charger circuit

Abstract

The utility model discloses a kind of timer charger circuit, the cooperation setting of power input module, transformer module, power output control module, PD fast charging output module, charging timing control module, charging timing control module includes charging timing control unit and trigger switch control unit, charging timing control unit controls the switch-on of power output control module to reach preset time, to control the charging time of charger, avoid the condition that electrical equipment has been full of electricity still continuously charges electrical equipment, effectively avoid battery overcharge and security risk, and in the condition that there is no electrical equipment charging in preset time, power output control module is disconnected, when needing restart, trigger switch control unit needs to send restart signal to charging timing control unit, charging timing control unit controls power output control module to open, continue to control PD fast charging output module to charge external device.

Description

Technical Field

[0001] This utility model relates to the technical field of charger circuits, specifically a timer charger circuit. Background Technology

[0002] A charger, also known as an "adapter," can be broadly categorized into travel chargers, desktop chargers, and maintenance chargers. Most users primarily encounter the first two types. Travel chargers are the most commonly sold type on the market.

[0003] When a charger charges a device, it typically provides continuous power until manually disconnected, which can easily lead to battery overcharging and shorten its lifespan. Furthermore, continuously charging a fully charged device for an extended period can also pose safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a timed charger circuit to solve the problem in the background art that continuing to charge the device when it is already fully charged can easily lead to battery overcharging and safety hazards.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A timed charger circuit includes a power input module, a transformer module, a power output control module, a PD fast charging output module, and a charging timer control module; The power input module is used to rectify AC power into high-voltage DC power and send it to the transformer. Device module; The transformer module is used to convert high-voltage direct current into low-voltage direct current; The power output control module is used to control the output voltage to charge external charging devices. The charging timing control module is used to control the power output control module to turn on or off, and to control the charging time. The charging timing control module includes a charging timing control unit and a trigger switch control unit. The charging timing control unit is used to receive the control signal from the trigger switch control unit and control the charging time of the charger.

[0006] In one embodiment, the transformer module includes a rectifier and filter unit for converting low-voltage AC power output from the secondary winding into low-voltage DC power.

[0007] In one embodiment, the power output control module includes a switching unit, which receives a control signal sent by the charging timing control unit to control the on-time of the switching unit.

[0008] In one embodiment, the PD fast charging output module includes a first PD fast charging output unit and a second PD fast charging output unit, which are used to charge external charging devices respectively.

[0009] In one embodiment, the charging timing control module includes a display unit for displaying the charging time.

[0010] In one embodiment, the charging timing control unit includes an LDO voltage regulator subunit, which is used to stabilize the input voltage to low-voltage DC to power the charging timing control unit.

[0011] In one embodiment, the timer charger circuit further includes a low-voltage DC output module, which is connected to the output terminal of the power input module and is used to output low-voltage DC power.

[0012] In one embodiment, the low-voltage DC output module includes a control unit for adjusting the duty cycle based on a feedback signal to stabilize the output voltage.

[0013] Compared with the prior art, the beneficial effects of this utility model are: The aforementioned timed charger circuit comprises a power input module, a transformer module, a power output control module, a PD fast charging output module, and a charging timer control module. The charging timer control module includes a charging timer control unit and a trigger switch control unit. The charging timer control unit controls the power output control module to be turned on for a preset time to control the charging time of the charger. This prevents the device from continuing to charge even when it is already fully charged, effectively avoiding battery overcharging and safety hazards. Furthermore, if no device is charging within the preset time, the power output control module is turned off. To restart, the trigger switch control unit sends a restart signal to the charging timer control unit, which then turns on the power output control module to continue controlling the PD fast charging output module to charge the external device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a timer charger circuit according to the present invention; Figure 2 for Figure 1 The present invention provides a circuit diagram of a power input module, a transformer module, a power output control module, and a low-voltage DC output module for a timer charger circuit. Figure 3 for Figure 1 Circuit diagram of a PD fast charging output module of a timer charger circuit in this utility model; Figure 4 for Figure 1The present invention relates to a circuit diagram of a charging timing control module for a timed charger circuit. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediary component present. Conversely, when a component is said to be "directly" connected to another component, there is no intermediary component.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] Please see Figure 1 A timed charger circuit includes a power input module 1, a transformer module 2, a power output control module 3, a PD fast charging output module 4, and a charging timer control module 5. Please see Figure 2 The power input module 1 is used to rectify AC power into high-voltage DC power and generate it concurrently. The AC power is supplied to the transformer module; after rectification and filtering, it generates high-voltage DC power, for example, 300V; the mains power (220V AC) is filtered by F1 (fuse) and LF1 (common-mode inductor) to remove high-frequency noise from the mains. Capacitor CX1 (X capacitor) further absorbs differential-mode interference, and R1A / R1B ensures that CX1 discharges quickly after power failure. The AC power is converted into pulsating DC (peak value approximately 310V) by BD1 (bridge rectifier); electrolytic capacitors EC1, EC2, and EC4 filter out ripple, outputting a stable high-voltage DC (300V) for use by the subsequent switching power supply.

[0019] The transformer module 2 is used to convert high-voltage DC power into low-voltage DC power; the transformer module 2 includes a rectifier and filter unit 21, which is used to convert low-voltage AC power output from the secondary winding into low-voltage DC power.

[0020] The 300V high-voltage DC power output from the power input module 1 is connected to the circuit through the primary winding of the transformer module 2, and low-voltage AC power is output through the secondary winding. The low-voltage AC power is converted into DC power through U2, and the smoothed and rectified DC voltage is output through the electrolytic capacitor EC3 and enters the power output control module 3. The power output control module 3 is used to control the output voltage to charge the external charging device; the power output control module includes a switching unit 31, which is used to receive the control signal sent by the charging timing control unit to control the conduction time of the switching unit.

[0021] Switching unit 31 is an N-MOS transistor Q3, used to control the on / off state of the circuit. The gate G of the N-MOS transistor Q3 is connected to the PA2 pin of the charging timing control unit 51 to receive control signals from the charging timing control unit 51.

[0022] Please see Figure 3 The PD fast charging output module 4 includes a first PD fast charging output unit 41 and a second PD fast charging output unit 42, which are used to charge external charging devices respectively.

[0023] The output terminal of the power output control module 3 is connected to the two ends of capacitor C14 of the first PD fast charging output unit 41 and the two ends of capacitor C21 of the second PD fast charging output unit 42, respectively. The power output control module 3 can control the charging of external charging devices by the first PD fast charging output unit 41 and the second PD fast charging output unit 42, as well as the charging time. The first PD fast charging output unit 41 includes a first power control subunit U6, which is used to control the first PD fast charging output unit 41 to charge external devices after receiving the DC voltage output by the power output control module 3; the first power control subunit U6 adjusts the internal DC-DC converter or drives the external MOSFET according to the protocol to output the target voltage.

[0024] The second PD fast charging output unit 42 includes a power management chip U9, which is used to control the second PD fast charging output unit 42 to charge external devices after receiving the DC voltage output by the power output control module 3.

[0025] Please see Figure 4 The charging timing control module 5 is used to control the power output control module 3 to turn on or off, and to control the charging time. The charging timing control module 5 includes a charging timing control unit 51 and a trigger switch control unit 52. The charging timing control unit 51 receives control signals from the trigger switch control unit 52 and controls the charging time of the charger. The charging timing control module 5 includes a display unit 53, which displays the charging time. The charging timing control unit 51 includes an LDO voltage regulator subunit U8, which stabilizes the input voltage to low-voltage DC to power the charging timing control unit. The PA1 pin of the charging timing control unit 51 is connected to one end of the resistor R35 of the trigger switch control unit 52. The PC0, PC1, PC2, PC3, PC4, and PA3 pins of the charging timing control unit 51 are connected to the display unit 53.

[0026] DC voltage is supplied to the charging timer control unit 51 through resistor R27. The LDO voltage regulator subunit U8 stabilizes the input voltage to low-voltage DC. When the timer charger needs to charge an external device, the charging timer control unit 51 sends a control signal to the N-MOS transistor Q3 of the switching unit 31 through the PA2 pin. The DC voltage output from the transformer module 2 enters the first PD fast charging output unit 41 and the second PD fast charging output unit 42 respectively to charge the external device for the preset time. At this time, the charging timer control unit 51 controls the N-MOS transistor Q3 to turn off through the PA2 pin, and the first PD fast charging output unit 41 and the second PD fast charging output unit 42 no longer charge the external device. When it is necessary to restart the timer charging, the switch K1 of the trigger switch control unit 52 is pressed. The trigger switch control unit 52 sends a start signal to the charging timer control unit 51. The charging timer control unit 51 sends a control signal to the N-MOS transistor Q3 of the switching unit 31 through the PA2 pin, so that the DC voltage output from the transformer module 2 enters the first PD fast charging output unit 41 and the second PD fast charging output unit 42 respectively to charge the external device for the preset time. The charging timer control unit 51 simultaneously controls the display unit 53 to display the charging time.

[0027] In one embodiment, the timer charger circuit further includes a low-voltage DC output module 6, which is connected to the output terminal of the power input module 1 and is used to output low-voltage DC power. The low-voltage DC output module 6 includes a control unit for adjusting the duty cycle according to a feedback signal to stabilize the output voltage.

[0028] The 300V high-voltage DC power output from the power input module 1 is transformed by the transformer T1B of the low-voltage DC output module 6 through the primary winding of the transformer module 2, and then output as low-voltage AC power. After being rectified by the rectifier diode D2 and the filter capacitor C12, it is converted into low-voltage DC power to supply power to external devices.

[0029] Thus, a timed charger circuit is configured with a power input module 1, a transformer module 2, a power output control module 3, a PD fast charging output module 4, and a charging timer control module 5. The charging timer control module 5 includes a charging timer control unit 51 and a trigger switch control unit 52. The charging timer control unit 51 controls the power output control module 3 to be turned on for a preset time to control the charging time of the charger. This avoids the device from being charged even when it is already fully charged, effectively preventing overcharging and safety hazards. Moreover, if no device is charged within the preset time, the power output control module 3 is turned off. When a restart is required, the trigger switch control unit 52 sends a restart signal to the charging timer control unit 51. The charging timer control unit 51 then turns on the power output control module 3 to continue controlling the PD fast charging output module 4 to charge the external device.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A timer charger circuit, characterized in that: It includes a power input module, a transformer module, a power output control module, a PD fast charging output module, and a charging timing control module; The power input module is used to rectify AC power into high-voltage DC power and send it to the transformer module; The transformer module is used to convert high-voltage direct current into low-voltage direct current; The power output control module is used to control the output voltage to charge external charging devices. The charging timing control module is used to control the power output control module to turn on or off, and to control the charging time. The charging timing control module includes: a charging timing control unit and a trigger switch control unit. The charging timing control unit is used to receive the control signal from the trigger switch control unit and control the charging time of the charger. The timer charger circuit also includes a low-voltage DC output module, which is connected to the output terminal of the power input module and is used to output low-voltage DC power. The low-voltage DC output module includes a control unit, which is used to adjust the duty cycle according to the feedback signal to stabilize the output voltage; The mains power is filtered by fuse F1 and common mode inductor LF1 to remove high-frequency noise from the mains power grid. Capacitor CX1 further absorbs differential mode interference. Discharge resistors R1A and R1B ensure that CX1 discharges quickly after power failure.

2. The timer charger circuit according to claim 1, characterized in that, The transformer module includes a rectifier and filter unit for converting the low-voltage AC output from the secondary winding into low-voltage DC.

3. The timer charger circuit according to claim 1, characterized in that, The power output control module includes a switching unit, which is used to receive control signals sent by the charging timing control unit to control the conduction time of the switching unit.

4. A timer charger circuit according to claim 1, characterized in that, The PD fast charging output module includes a first PD fast charging output unit and a second PD fast charging output unit, which are used to charge external charging devices respectively.

5. A timer charger circuit according to claim 1, characterized in that, The charging timing control module includes a display unit, which is used to display the charging time.

6. A timer charger circuit according to claim 1, characterized in that, The charging timing control unit includes an LDO voltage regulator subunit, which is used to stabilize the input voltage to low-voltage DC to power the charging timing control unit.

Images