A charge-discharge control circuit for a printer

Abstract

The application provides a charge-discharge control circuit for a printer, relates to the field of control circuits, and discloses a charge-discharge control circuit for a printer, which comprises a power supply, a filter circuit, a boost circuit, a first low-voltage circuit, a second low-voltage circuit, a voltage conversion circuit, a first boost circuit and a second boost circuit, and the output voltage of the output end of the first boost circuit and the output end of the second boost circuit is 12V; the boost circuit provides 5V voltage, the first low-voltage circuit and the second low-voltage circuit provide negative voltage respectively, the voltage conversion circuit, the first boost circuit and the second boost circuit provide 12V voltage, different voltages can be provided for the printer, the design is compact, the number and area of PCBs can be reduced, and the charge-discharge control circuit is more portable.

Description

Technical Field

[0001] This application relates to the field of control circuits, and more specifically, to a charge and discharge control circuit for a printer. Background Technology

[0002] In industrial inkjet printers, traditional charging and discharging circuits are inefficient, multi-battery management is complex, and multi-chip combinations result in chaotic timing control, high energy loss, lack of support for adaptive switching of multiple power supplies, insufficient circuit power supply requirements, slow response speed of overcharge / over-discharge protection, unstable voltage, and large ripple. Summary of the Invention

[0003] The purpose of this application is to provide a charging and discharging control circuit for a printer, which can solve the above-mentioned technical problems.

[0004] This application provides a charging and discharging control circuit for a printer, including a power supply, a filter circuit, a boost circuit, a first low-voltage circuit, a second low-voltage circuit, a voltage conversion circuit, a first boost circuit, and a second boost circuit. The output terminal of the power supply is connected to the input terminal of the filter circuit, and the output terminal of the filter circuit is connected to the input terminal of the boost circuit. The output terminal of the boost circuit is connected to the input terminals of the first low-voltage circuit and the second low-voltage circuit, respectively. The output voltage of the first low-voltage circuit and the second low-voltage circuit is +3.3V. The input terminal of the voltage conversion circuit is connected to the output terminal of the boost circuit, and the output terminal of the voltage conversion circuit is connected to the input terminals of the first boost circuit and the second boost circuit, respectively. The output voltage of the first boost circuit and the second boost circuit is 12V.

[0005] Preferably, the filter circuit includes capacitor C213, inductor L204, and capacitor C214.

[0006] Preferably, the boost circuit includes a boost converter U203, which is model IP5306.

[0007] Preferably, the first low-voltage circuit includes a buck converter U201, and the second low-voltage circuit includes a buck converter U202, wherein both the buck converter U201 and the buck converter U202 are of model TLV62569DBVR.

[0008] Preferably, the voltage conversion circuit includes a switched capacitor and a voltage converter U204, wherein the voltage converter U204 is model LM2663.

[0009] Preferably, the first boost circuit includes a boost converter MD201, and the second boost circuit includes a boost converter MD202. The model number of both the boost converter MD201 and the boost converter MD202 is B0512S.

[0010] Preferably, the output voltage of the boost circuit is +5V.

[0011] The beneficial effects of this utility model are:

[0012] This utility model provides a charging and discharging control circuit for a printer, including a power supply, a filter circuit, a boost circuit, a first low-voltage circuit, a second low-voltage circuit, a voltage conversion circuit, a first boost circuit, and a second boost circuit. The output terminal of the power supply is connected to the input terminal of the filter circuit, the output terminal of the filter circuit is connected to the input terminal of the boost circuit, and the output terminal of the boost circuit is connected to the input terminals of the first low-voltage circuit and the second low-voltage circuit, respectively. The output voltage of the first low-voltage circuit and the second low-voltage circuit is +3.3V. The input terminal of the voltage conversion circuit is connected to the output terminal of the boost circuit. The output terminal of the voltage conversion circuit is connected to the input terminals of the first boost circuit and the second boost circuit, respectively. The output voltage of the first boost circuit and the second boost circuit is 12V. The boost circuit of this invention provides 5V voltage, the first low-voltage circuit and the second low-voltage circuit provide negative voltage, and the voltage conversion circuit, the first boost circuit and the second boost circuit provide 12V voltage. It can provide different voltages to the printer, and its compact design can reduce the number and area of ​​PCB boards, making it more portable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a diagram of the boost circuit of this utility model;

[0015] Figure 2 These are the first low-voltage circuit diagram and the second low-voltage circuit diagram of this utility model;

[0016] Figure 3 This is a voltage conversion circuit diagram of the present invention;

[0017] Figure 4 The first and second boost circuit diagrams are not applicable to utility models.

[0018] Figure 5 This is a circuit diagram of the filter circuit of this utility model; Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] like Figure 1-5 As shown, a charging and discharging control circuit for a printer includes a power supply, a filter circuit, a boost circuit, a first low-voltage circuit, a second low-voltage circuit, a voltage conversion circuit, a first boost circuit, and a second boost circuit. The output terminal of the power supply is connected to the input terminal of the filter circuit, the output terminal of the filter circuit is connected to the input terminal of the boost circuit, and the output terminal of the boost circuit is connected to the input terminals of the first low-voltage circuit and the second low-voltage circuit, respectively. The output voltage of the first low-voltage circuit and the second low-voltage circuit is +3.3V. The input terminal of the conversion circuit is connected to the output terminal of the boost circuit. The output terminal of the voltage conversion circuit is connected to the input terminals of the first boost circuit and the second boost circuit, respectively. The output voltage of the first boost circuit and the second boost circuit is 12V. The boost circuit of this invention provides 5V voltage, the first low-voltage circuit and the second low-voltage circuit provide negative voltage, and the voltage conversion circuit, the first boost circuit and the second boost circuit provide 12V voltage. It can provide different voltages to the printer, and its compact design can reduce the number and area of ​​PCB boards, making it more portable.

[0026] like Figure 5 As shown, in this embodiment, the filter circuit includes capacitor C213, inductor L204, and capacitor C214.

[0027] like Figure 1 As shown, in this embodiment, the boost circuit includes a boost converter U203, which is model IP5306.

[0028] like Figure 2 As shown, in this embodiment, the first low-voltage circuit includes a buck converter U201, and the second low-voltage circuit includes a buck converter U202. Both the buck converter U201 and the buck converter U202 are of model TLV62569DBVR.

[0029] like Figure 3As shown, in this embodiment, the voltage conversion circuit includes a switched capacitor and a voltage converter U204, the voltage converter U204 being model LM2663.

[0030] like Figure 4 As shown in this embodiment, the first boost circuit includes a boost converter MD201, and the second boost circuit includes a boost converter MD202. The model numbers of both boost converter MD201 and boost converter MD202 are B0512S.

[0031] like Figure 1 As shown, in this embodiment, the output voltage of the boost circuit is +5V.

[0032] This utility model uses the IP5306 highly integrated mobile power chip. The IP5306 is a multi-functional power management system that integrates a boost converter, lithium battery charging management, and battery power indicator. It provides a complete power solution for this utility model, enabling synchronous switching charging and discharging, adaptive charging current adjustment, adaptive matching, low power consumption, multiple protections, and high reliability.

[0033] This invention uses an LM2663 charge pump to power a dual-source operational amplifier, which not only solves the problem of limited signal dynamic range in single-supply schemes, but also significantly improves system performance: the dual-supply operational amplifier can directly process AC signals with positive and negative swings without the need for the DC bias circuit required by a single power supply, which simplifies the design and avoids the introduction of additional noise; at the same time, the input / output of the operational amplifier under dual power supply can approach the true "zero potential", improving the common-mode rejection ratio (CMRR) and reducing signal distortion.

[0034] This design uses two TLV62569DBVR synchronous buck converters to separately power the digital (+3V3A) and analog (+3V3A) circuits, significantly optimizing system performance and energy efficiency. Its advantages lie in noise isolation and improved efficiency: high-frequency switching noise in digital circuits can easily interfere with sensitive analog signal chains (DAC, ADC) through power supply coupling; independent power supply can block common-mode noise paths. The high efficiency of synchronous buck converters significantly reduces conversion losses, effectively extending battery life. The primary reason for choosing the TLV62569DBVR synchronous buck converter is its low dropout input characteristic and wide input voltage range, perfectly suited to the power supply requirements of lithium batteries. As lithium batteries discharge, the voltage gradually decreases. When the input voltage approaches the output voltage (e.g., 3.7V), traditional asynchronous buck converters may experience a sharp drop in efficiency or even fail to regulate voltage due to insufficient voltage drop. The TLV62569, however, uses a synchronous rectification architecture and low on-resistance MOSFETs to ensure a stable output voltage until the battery is depleted, avoiding energy waste.

[0035] This design utilizes two B0512S isolated power supply modules to generate ±12V power. The B0512S modules feature an ultra-thin and compact design, achieving high reliability within a very small space. The two modules are connected back-to-back (one module outputs +12V, and the other is reversed to output -12V), forming a symmetrical ±12V power supply. Using isolated modules to construct a symmetrical power supply offers significant advantages in terms of both space and cost.

[0036] This invention extensively utilizes π-shaped filter circuits, which play a crucial role in power supply systems. It primarily consists of two capacitors and one inductor, resembling the letter π. Its highly efficient filtering characteristics significantly suppress high-frequency noise, substantially attenuating the high-frequency AC components in the output DC voltage, effectively reducing ripple voltage, and resulting in an extremely smooth and stable DC voltage output, significantly improving power quality. It also excels in enhancing electromagnetic compatibility, preventing external high-frequency noise from intruding into equipment and preventing internal interference from propagating outwards. The π-shaped filter circuit has a simple structure, providing a high-quality and stable power environment for electronic devices at a relatively low cost. In this design, this circuit effectively reduces power supply noise and improves the signal quality of analog circuits.

[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A charging and discharging control circuit for a printer, characterized in that: The system includes a power supply, a filter circuit, a boost circuit, a first low-voltage circuit, a second low-voltage circuit, a voltage conversion circuit, a first boost circuit, and a second boost circuit. The output terminal of the power supply is connected to the input terminal of the filter circuit, and the output terminal of the filter circuit is connected to the input terminal of the boost circuit. The output terminal of the boost circuit is connected to the input terminals of the first low-voltage circuit and the second low-voltage circuit, respectively. The output voltage of the first low-voltage circuit and the second low-voltage circuit is +3.3V. The input terminal of the voltage conversion circuit is connected to the output terminal of the boost circuit, and the output terminal of the voltage conversion circuit is connected to the input terminals of the first boost circuit and the second boost circuit, respectively. The output voltage of the first boost circuit and the second boost circuit is 12V.

2. The charging and discharging control circuit for a printer according to claim 1, characterized in that: The filter circuit includes capacitor C213, inductor L204, and capacitor C214.

3. The charging and discharging control circuit for a printer according to claim 1, characterized in that: The boost circuit includes a boost converter U203, which is model IP5306.

4. The charging and discharging control circuit for a printer according to claim 1, characterized in that: The first low-voltage circuit includes a buck converter U201, and the second low-voltage circuit includes a buck converter U202. Both the buck converter U201 and the buck converter U202 are of model TLV62569DBVR.

5. A charging and discharging control circuit for a printer according to claim 1, characterized in that: The voltage conversion circuit includes a switched capacitor and a voltage converter U204, the voltage converter U204 being model LM2663.

6. The charging and discharging control circuit for a printer according to claim 1, characterized in that: The first boost circuit includes a boost converter MD201, and the second boost circuit includes a boost converter MD202. The model number of both boost converter MD201 and boost converter MD202 is B0512S.

7. The charging and discharging control circuit for a printer according to claim 1, characterized in that: The output voltage of the boost circuit is +5V.

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