Hearing aid charging circuit with ultra-low standby power consumption

Abstract

The utility model discloses a hearing aid charging circuit with ultra-low standby power consumption. The utility model provides a hearing aid charging circuit with ultra-low standby power consumption. The hearing aid charging circuit comprises a charging box detection control module, a charging box charging boosting module and a hearing aid box entry detection charging module, the hearing aid charging circuit with ultra-low standby power consumption provided by the utility model has the function of actively judging the charging state of the hearing aid by hardware so as to control the power supply of the charging management chip, so that the circuit has ultra-low standby power consumption performance.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, and in particular to an ultra-low standby power consumption hearing aid charging circuit. Background Art

[0002] Hearing aid charging boxes are charging devices designed specifically for hearing aids. Their main function is to provide safe and efficient energy replenishment for hearing aids. With the continuous advancement and popularization of hearing aid technology, hearing aid charging boxes have become an indispensable accessory for hearing aid users. The circuit design of hearing aid charging boxes is crucial to ensure that users can charge their hearing aids anytime and anywhere to ensure the continuous use of hearing aids.

[0003] Although the existing hearing aid charging boxes have made certain technological progress, there are still some shortcomings. Some charging boxes have high standby power consumption, and will still consume a certain amount of power when not in use for a long time, resulting in power waste and shortened charging box life, affecting the user experience. Therefore, it is of great significance to develop a charging circuit for hearing aids with ultra-low standby power consumption. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and provide an ultra-low standby power consumption hearing aid charging circuit. By adopting advanced power management technology and optimizing the charging circuit design, the hearing aid charging circuit has ultra-low standby power consumption performance.

[0005] The utility model provides an ultra-low standby power consumption hearing aid charging circuit, comprising: a charging box detection control module, a charging box charging boost module and a hearing aid entry detection charging module;

[0006] The charging box detection control module includes: a single-chip microcomputer U1 and a power supply and a reset circuit connected to the single-chip microcomputer U1; the 3rd pin of the single-chip microcomputer U1 is connected to the signal 5V_EN for controlling the 5V output of charging the hearing aid, the 16th pin of the single-chip microcomputer U1 is connected to the signal HA1_V_DCT for detecting the real-time voltage of the hearing aid, the 18th pin of the single-chip microcomputer U1 is connected to the signal HA1_CHG_DCT for detecting the charging status of the hearing aid, and the 20th pin of the single-chip microcomputer U1 is connected to the signal BAT_CHG_DCT for detecting the charging status of the lithium battery of the charging box;

[0007] The charging box charging boost module includes: a lithium battery charging boost chip U3, an EN pin of the lithium battery charging boost chip U3 is connected to a resistor R12, the resistor R12 is connected to a signal 5V_EN, a CHRG pin of the lithium battery charging boost chip U3 is connected to a resistor R11, and the resistor R11 is connected to a signal BAT_CHG_DCT;

[0008] The hearing aid box entry detection charging module includes: a charging management chip U2, a MOS tube Q1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5; the resistor R4 is connected to the resistor R7, and the resistor R7 is connected to the CHRG pin of the charging management chip U2; the resistor R9 is connected to the resistor R6, and the resistor R6, the resistor R5 and the resistor R3 are respectively connected to the BAT pin of the charging management chip U2; the resistor R8 is connected to the charging The PROG pin of the management chip U2 is connected; the capacitor C4 is connected in series with the resistor R5, the capacitor C2 is connected in parallel to both ends of the capacitor C4 and the resistor R5, and the capacitor C5 is connected in parallel with the resistor R9; one end of the capacitor C3 is connected to the resistor R3, and the other end of the capacitor C3 is connected to the resistor R7; the resistor R10 is connected to the CHRG pin of the charging management chip U2; the MOS tube Q1 is connected to the VCC pin of the charging management chip U2; the resistor R10 is connected to the signal HA1_CHG_DCT, and the signal HA1_V_DCT is connected between the resistor R6 and the resistor R9.

[0009] Furthermore, the resistor R1, the resistor R2 and the capacitor C1 form the reset circuit, the resistor R1 is connected to the 7th pin of the single-chip microcomputer U1, the capacitor C1 is connected to the resistor R2, and the resistor R2 is connected to the 8th pin of the single-chip microcomputer U1.

[0010] Furthermore, the charging box detection control module uses power supply V3.3 to power the microcontroller U1.

[0011] Furthermore, in the charging box charging boost module, the ISET pin of the lithium battery charging boost chip U3 is connected to the resistor R14, the NTC pin of the lithium battery charging boost chip U3 is connected to the resistor R13, the VIN pin of the lithium battery charging boost chip U3 is connected to the capacitor C6, the BAT pin of the lithium battery charging boost chip U3 is connected to the capacitor C7, the SW pin of the lithium battery charging boost chip U3 is connected to the inductor L1 and the capacitor C7, and the VOUT pin of the lithium battery charging boost chip U3 is connected to the capacitor C8 and the capacitor C9.

[0012] The utility model has the following beneficial effects: the utility model provides an ultra-low standby power consumption hearing aid charging circuit, including: a charging box detection control module, a charging box charging boost module and a hearing aid entry detection charging module; it has hardware to actively judge the charging status of the hearing aid, and then control the power supply function of the charging management chip, so that the circuit has ultra-low standby power consumption performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a circuit diagram of the ultra-low standby power consumption hearing aid charging circuit of the utility model; DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the art to which the present application belongs.

[0016] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0017] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for clarity, the thickness of the layers and regions is enlarged, and the same reference numerals are used to represent the same devices, so their description will be omitted.

[0018] See also Figure 1The embodiment of the utility model provides an ultra-low standby power consumption hearing aid charging circuit, including: a charging box detection control module, a charging box charging boost module and a hearing aid entry detection charging module.

[0019] Specifically, the charging box detection control module includes: a single-chip microcomputer U1 and a power supply and a reset circuit connected to the single-chip microcomputer U1. The 3rd pin of the single-chip microcomputer U1 is connected to the signal 5V_EN for controlling the 5V output of charging the hearing aid, the 16th pin of the single-chip microcomputer U1 is connected to the signal HA1_V_DCT for detecting the real-time voltage of the hearing aid, the 18th pin of the single-chip microcomputer U1 is connected to the signal HA1_CHG_DCT for detecting the charging status of the hearing aid, and the 20th pin of the single-chip microcomputer U1 is connected to the signal BAT_CHG_DCT for detecting the charging status of the lithium battery in the charging box. Resistor R1 is connected to the 7th pin of the single-chip microcomputer U1, capacitor C1 is connected to resistor R2, and resistor R2 is connected to the 8th pin of the single-chip microcomputer U1.

[0020] In the charging box detection control module, the circuit works as follows: power supply V3.3 supplies power to the microcontroller U1; resistor R1, resistor R2, and capacitor C1 form the reset circuit of the microcontroller U1; signal "HA1_CHG_DCT" detects the charging status of the hearing aid; signal "HA1_V_DCT" detects the real-time voltage of the hearing aid; signal "BAT_CHG_DCT" detects the charging status of the lithium battery in the charging box; signal "5V_EN" controls the output of 5V to charge the hearing aid.

[0021] Specifically, the charging box charging boost module includes: a lithium battery charging boost chip U3, and necessary peripheral devices. This part of the circuit outputs 5V to provide power to the hearing aid charging circuit. The EN pin of the lithium battery charging boost chip U3 is connected to resistor R12, and resistor R12 is connected to the signal 5V_EN. The CHRG pin of the lithium battery charging boost chip U3 is connected to resistor R11, and resistor R11 is connected to the signal BAT_CHG_DCT. The ISET pin of the lithium battery charging boost chip U3 is connected to resistor R14, the NTC pin of the lithium battery charging boost chip U3 is connected to resistor R13, the VIN pin of the lithium battery charging boost chip U3 is connected to capacitor C6, the BAT pin of the lithium battery charging boost chip U3 is connected to capacitor C7, the SW pin of the lithium battery charging boost chip U3 is connected to inductor L1 and capacitor C7, and the VOUT pin of the lithium battery charging boost chip U3 is connected to capacitor C8 and capacitor C9.

[0022] Specifically, the hearing aid box detection charging module includes: a charging management chip U2, a MOS tube Q1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5; the resistor R4 is connected to the resistor R7, and the resistor R7 is connected to the CHRG pin of the charging management chip U2; the resistor R9 is connected to the resistor R6, and the resistor R6, the resistor R5 and the resistor R3 are respectively connected to the BAT pin of the charging management chip U2; the resistor R8 is connected to the charging The PROG pin of the charge management chip U2 is connected; the capacitor C4 is connected in series with the resistor R5, the capacitor C2 is connected in parallel with the capacitor C4 and the resistor R5, and the capacitor C5 is connected in parallel with the resistor R9; one end of the capacitor C3 is connected to the resistor R3, and the other end of the capacitor C3 is connected to the resistor R7; the resistor R10 is connected to the CHRG pin of the charge management chip U2; the MOS tube Q1 is connected to the VCC pin of the charge management chip U2; the resistor R10 is connected to the signal HA1_CHG_DCT, and the signal HA1_V_DCT is connected between the resistor R6 and the resistor R9.

[0023] In the hearing aid box detection and charging module, the circuit works as follows: when the hearing aid is not inserted, the first pin of the charging management chip U2 is in a high-impedance state; at this time, the resistor R3 pulls up the voltage of the capacitor C3 to 5V, and the G pole of the MOS tube Q1 is at a high level, and the MOS tube Q1 is in a disconnected state, turning off the power supply of the charging management chip U2 and reducing the system power consumption.

[0024] When the hearing aid is placed in the charging box, capacitor C3 discharges through the hearing aid, instantly lowering the G pole voltage of MOS tube Q1. At this time, MOS tube Q1 is turned on, and 5V supplies power to the charging management chip U2 through MOS tube Q1. At this time, the hearing aid starts to be charged. During the charging process, pin 1 of the charging management chip U2 outputs a low level. By configuring resistors R4 and R7, MOS tube Q1 is always kept on.

[0025] When the machine is fully charged, the 1st pin of the charging management chip U2 is in a high impedance state, which makes the G pole voltage of the MOS tube Q1 high. At this time, the MOS tube Q1 is turned off and stops supplying power to the charging management chip U2, reducing the power consumption of the charging management chip of the charging box after the hearing aid is fully charged. Resistor R8 is used to set the charging current of the hearing aid. Resistor R5, capacitor C4, and capacitor C2 form a filter circuit for charging the hearing aid. Resistor R6, resistor R9, and capacitor C5 form a detection circuit for the hearing aid battery, which can detect the hearing aid battery voltage in real time.

[0026] It can be seen from the above embodiments that the utility model provides an ultra-low standby power consumption hearing aid charging circuit, comprising: a charging box detection control module, a charging box charging boost module and a hearing aid entry detection charging module; it has hardware to actively judge the charging status of the hearing aid, and then control the power supply function of the charging management chip, so that the circuit has ultra-low standby power consumption performance.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An ultra-low standby power consumption hearing aid charging circuit, characterized in that: include: Charging box detection control module, charging box charging boost module and hearing aid entry detection charging module; The charging box detection control module includes: a single-chip microcomputer U1 and a power supply and a reset circuit connected to the single-chip microcomputer U1; the 3rd pin of the single-chip microcomputer U1 is connected to the signal 5V_EN for controlling the 5V output of charging the hearing aid, the 16th pin of the single-chip microcomputer U1 is connected to the signal HA1_V_DCT for detecting the real-time voltage of the hearing aid, the 18th pin of the single-chip microcomputer U1 is connected to the signal HA1_CHG_DCT for detecting the charging status of the hearing aid, and the 20th pin of the single-chip microcomputer U1 is connected to the signal BAT_CHG_DCT for detecting the charging status of the lithium battery of the charging box; The charging box charging boost module includes: a lithium battery charging boost chip U3, an EN pin of the lithium battery charging boost chip U3 is connected to a resistor R12, the resistor R12 is connected to a signal 5V_EN, a CHRG pin of the lithium battery charging boost chip U3 is connected to a resistor R11, and the resistor R11 is connected to a signal BAT_CHG_DCT; The hearing aid box entry detection charging module includes: a charging management chip U2, a MOS tube Q1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5; the resistor R4 is connected to the resistor R7, and the resistor R7 is connected to the CHRG pin of the charging management chip U2; the resistor R9 is connected to the resistor R6, and the resistor R6, the resistor R5 and the resistor R3 are respectively connected to the BAT pin of the charging management chip U2; the resistor R8 is connected to the charging The PROG pin of the management chip U2 is connected; the capacitor C4 is connected in series with the resistor R5, the capacitor C2 is connected in parallel to both ends of the capacitor C4 and the resistor R5, and the capacitor C5 is connected in parallel with the resistor R9; one end of the capacitor C3 is connected to the resistor R3, and the other end of the capacitor C3 is connected to the resistor R7; the resistor R10 is connected to the CHRG pin of the charging management chip U2; the MOS tube Q1 is connected to the VCC pin of the charging management chip U2; the resistor R10 is connected to the signal HA1_CHG_DCT, and the signal HA1_V_DCT is connected between the resistor R6 and the resistor R9.

2. The ultra-low standby power consumption hearing aid charging circuit according to claim 1, characterized in that: The resistor R1, the resistor R2 and the capacitor C1 form the reset circuit. The resistor R1 is connected to the seventh pin of the single-chip microcomputer U1. The capacitor C1 is connected to the resistor R2. The resistor R2 is connected to the eighth pin of the single-chip microcomputer U1.

3. The ultra-low standby power consumption hearing aid charging circuit according to claim 1, characterized in that: The charging box detection control module uses power supply V3.3 to power the microcontroller U1.

4. The ultra-low standby power consumption hearing aid charging circuit according to claim 1, characterized in that: In the charging box charging boost module, the ISET pin of the lithium battery charging boost chip U3 is connected to the resistor R14, the NTC pin of the lithium battery charging boost chip U3 is connected to the resistor R13, the VIN pin of the lithium battery charging boost chip U3 is connected to the capacitor C6, the BAT pin of the lithium battery charging boost chip U3 is connected to the capacitor C7, the SW pin of the lithium battery charging boost chip U3 is connected to the inductor L1 and the capacitor C7, and the VOUT pin of the lithium battery charging boost chip U3 is connected to the capacitor C8 and the capacitor C9.

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