CN211765225U - Automobile steering voice broadcast device - Google Patents
Automobile steering voice broadcast device Download PDFInfo
- Publication number
- CN211765225U CN211765225U CN201922442368.4U CN201922442368U CN211765225U CN 211765225 U CN211765225 U CN 211765225U CN 201922442368 U CN201922442368 U CN 201922442368U CN 211765225 U CN211765225 U CN 211765225U
- Authority
- CN
- China
- Prior art keywords
- power
- voice
- circuit board
- interface
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model belongs to the technical field of automotive electronics, in particular to an automobile steering voice broadcast device, which comprises a control box and a loudspeaker, wherein the side wall of the control box is respectively provided with an external interface, a power switch, a power interface of the control box and a signal connector, and the external interface is electrically connected with the loudspeaker; the circuit board is arranged in the control box, the circuit board is provided with a voice broadcast device circuit, a circuit board signal input interface, a circuit board power interface and a circuit board output interface, the voice broadcast device circuit comprises a voice power amplification power module and a voice power amplification module, the voice power amplification power module adopts a power supply design scheme that the input voltage is wide, the voltage is increased and decreased, the output voltage is constant, and the like. The technical scheme of the utility model the wide input range heavy current constant voltage power supply scheme of direct current that adopts the XL6007 chip provides effective stable voltage for audio power amplifier, and guarantee audio power amplifier work is at best operating point.
Description
Technical Field
The utility model belongs to the technical field of automotive electronics, particularly, relate to a car turns to voice broadcast ware.
Background
Because the audio power amplifying devices of the similar automobile voice steering broadcaster circulated in the existing market adopt power devices similar to TDA2030, LM1875 and the like working in class A amplification, the devices are originally designed for high fidelity audio power amplification (HI-FI), and the conversion efficiency of electric energy is sacrificed to reach the design index of the HI-FI. Unfortunately, because the load horn of the automobile voice steering broadcaster is determined to have high impedance of 10 to 16 omega due to the structure and the durability of the product, the impedance of the load horn is severely mismatched with the optimal impedance matching of 4 omega/8 omega of the audio power amplifying device, so that the audio fidelity of the converted output is reduced, and the audio fidelity deviates from the HI-FI index. Therefore, the existing audio broadcasting device circuit has the problems that the audio conversion efficiency of the audio broadcasting device is not high, the heating is serious, the sound intensity is not high, the continuous working time is not long, and the circuit is easy to damage.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a car turns to voice broadcast ware, adopt and be similar to TDA2030 with solving current voice player, work such as LM1875 is at the enlarged power device of class A, load loudspeaker impedance is high impedance 10 to 16 omega, it is mismatch seriously with the best impedance match 4 omega/8 omega of above-mentioned audio power amplifier device, so that the audio fidelity of conversion output reduces, the HI-FI index has deviated, there is voice broadcast ware audio frequency conversion efficiency not high, it is serious to generate heat, the sound intensity is not high, continuous operation time is not long, damage scheduling problem easily.
In order to solve the problems, the utility model provides an automobile steering voice broadcasting device, which comprises a control box and a loudspeaker, wherein the control box adopts a composite body with an upper opening, the opening is provided with an upper cover, the side wall of the control box is respectively provided with an external interface, a power switch, a power interface of the control box and a signal connector, and the external interface is electrically connected with the loudspeaker; be provided with the circuit board in the control box, be provided with voice broadcast ware circuit, circuit board signal input interface, circuit board power source and circuit board output interface on the circuit board, voice broadcast ware circuit includes voice power amplification power module and voice power amplification module, voice power amplification power module includes: a power supply chip,
the VIN pin and the EN pin of the power chip are connected in parallel and then are connected with an input power supply and grounded after passing through a capacitor C43, the VIN pin and the EN pin are connected with the SW pin through an inductor L2, the inductor L2 and the SW pin are connected with a diode D9 in series through a capacitor C9 and are connected with an output end, and the output end is grounded with capacitors C16 and C44 which are connected in parallel;
the FB pin of the power chip is grounded through the resistor R52 and is connected between the diode D9 and the output end through the resistor R51;
the voice power amplification module comprises: a voice power amplifying chip is arranged on the voice power amplifier,
the VDD pin of the voice power amplification chip is connected with the output end of the power supply chip, and then is grounded after passing through a capacitor C1, a capacitor C2 and a capacitor C3 which are connected in parallel;
the Bypass pin of the voice power amplification chip is grounded after passing through a decoupling capacitor, and the CTRL pin of the power amplification chip is connected with the output end of the power chip through a resistor R30 after being connected with the decoupling capacitor in parallel through a resistor R13;
and an OUT + pin and an OUT-pin of the voice power amplification chip are connected with an output interface of the circuit board.
Furthermore, the power interface of the control box is connected with the power switch in series and then is communicated with the power interface of the circuit board.
Furthermore, the signal connecting port is communicated with the signal input interface of the circuit board through a flat cable.
Furthermore, the external interface is communicated with the output interface of the circuit board through a flat cable.
Further, the power supply chip is XL 6007.
Further, the audio power amplification chip is HM 8773.
Furthermore, a loudspeaker is connected to the output interface of the circuit board.
The utility model has the advantages that: the technical scheme of the utility model is that the circuit is redesigned, and the scheme of the large-current stabilized voltage power supply with the wide direct current input range of the XL6007 chip is adopted to provide effective and stable voltage for the audio power amplifier, so that the audio power amplifier is ensured to work at the optimal working point; an HM8773 voice power amplification chip D-type audio power amplification device is adopted, so that the audio conversion efficiency is improved, the heat productivity of the device is greatly reduced, and long-time continuous voice broadcasting is realized;
the power supply circuit adopts an SPEIC circuit form, and realizes that when the input voltage is lower than the output voltage, the circuit automatically enters a boosting mode by automatically adjusting the duty ratio of PWM, and the output voltage is constant at the designed output voltage + 12V. On the contrary, when the output voltage is larger than the input voltage, the circuit automatically enters a voltage reduction mode by automatically adjusting the duty ratio of the PWM. Through the actual test of the circuit input voltage from +9V according to the mode of step length +1V, the output power supply can be stabilized at +12V all the time, and the design requirement of the circuit of the voice broadcaster is well met
Drawings
In the drawings:
FIG. 1 is a schematic view of the connection of the whole mechanism of the present invention;
fig. 2 is a power supply module for amplifying voice power of the present invention;
fig. 3 is a voice power amplification module of the present invention;
in the figure, 1 is an upper cover, 2 is a control box, 3 is an external interface, 4 is a loudspeaker, 5 is a flat cable, 6 is a circuit board output interface, 7 is a circuit board, 8 is a circuit board power interface, 9 is a circuit board signal input interface, 10 is a signal connector, 11 is a power switch, and 12 is a control box power interface.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1: as shown in fig. 1-3, a car turns to voice broadcast ware, including control box 2 and speaker 4, control box 2 adopts the fit of top open-ended to make, and the material chooses for use the pvc material, is provided with upper cover 1 at 2 openings of control box, and upper cover 1 passes through the screw to be installed at 2 tops of control box, is provided with on the lateral wall of control box 2 respectively and puts interface 3, switch 11, control box power source 12 and signal connector 10, puts interface 3 and is connected with speaker 4 electricity through the cable.
A circuit board 7 is arranged in the control box 2, a voice broadcaster circuit, a circuit board signal input interface 9, a circuit board power interface 8 and a circuit board output interface 6 are arranged on the circuit board 7, wherein a control box power interface 12 is connected with a power switch 11 in series and then is communicated with the circuit board power interface 8; the signal connector 10 is communicated with the circuit board signal input interface 9 through the flat cable 5; the external interface 3 is communicated with the output interface 6 of the circuit board through the flat cable 5.
The voice broadcast device circuit comprises a voice power amplification power supply module and a voice power amplification module, wherein the voice power amplification power supply module comprises: the power chip adopts the XL6007 chip, and the VIN foot and the EN foot of the power chip are connected in parallel and then connected into an input power supply, and the input power supply is suitable for DC: +9.0V- +33V, the input power, VIN pin and EN pin are grounded after passing through a capacitor C43 of 100nF, VIN pin and EN pin are connected with SW pin of the power chip through an inductor L2 of 47uH/5A, inductor L2 and SW pin are connected with an output end Vout after being connected with a Schottky diode D9 in series through a capacitor C9 of 22uF, and the output end is grounded with capacitors C16 and C44 which are connected in parallel; the FB pin of the power chip is grounded after passing through a resistor R52 of 1k, and is connected between a diode D9 and an output end Vout after passing through a resistor R51 of 8.66 k; and emptying an NC pin of the power supply chip. The capacitor C9 and the diode D9 are grounded through the inductor L3.
The voice power amplification module comprises: the voice power amplification chip is an HM8773 chip, a VDD pin of the voice power amplification chip is connected with an output end Vout of the power supply chip, and then the voice power amplification chip is grounded after passing through a capacitor C1, a capacitor C2 and a capacitor C3 which are connected in parallel; the Bypass pin of the voice power amplification chip is grounded after passing through a decoupling capacitor, and the CTRL pin of the voice power amplification chip is connected with the output end Vout of the power supply chip through a resistor R30 after passing through a resistor R13 and the decoupling capacitor which are connected in parallel; and an OUT + pin and an OUT-pin of the voice power amplification chip are connected with a circuit board output interface 6 on a circuit board 7. An input pin IN + pin of the voice power amplification chip is connected with an audio input end through a resistor and a capacitor C14; the IN-pin of the voice power amplifying chip is grounded after passing through the resistor R5 and the capacitor C15.
The foregoing detailed description has provided for the present application and the principles and embodiments of the present application can be illustrated by specific examples, which are provided only for the purpose of facilitating understanding of the method and the core concept of the present application, and persons skilled in the art may change the embodiments and application scope according to the concept of the present application.
Claims (7)
1. A voice broadcaster for automobile steering comprises a control box and a loudspeaker, wherein the control box is a box body with an opening at the upper part, an upper cover is arranged at the opening, an external interface, a power switch, a power interface of the control box and a signal connector are respectively arranged on the side wall of the control box, and the external interface is electrically connected with the loudspeaker; be provided with the circuit board in the control box, be provided with voice broadcast ware circuit, circuit board signal input interface, circuit board power source and circuit board output interface, its characterized in that on the circuit board: the voice broadcast ware circuit includes voice power amplification power module and voice power amplification module, voice power amplification power module includes: a power supply chip,
the VIN pin and the EN pin of the power chip are connected in parallel and then are connected with an input power supply and grounded after passing through a capacitor C43, the VIN pin and the EN pin are connected with the SW pin through an inductor L2, the inductor L2 and the SW pin are connected with a diode D9 in series through a capacitor C9 and are connected with an output end, and the output end is grounded with capacitors C16 and C44 which are connected in parallel;
the FB pin of the power chip is grounded through the resistor R52 and is connected between the diode D9 and the output end through the resistor R51;
the voice power amplification module comprises: a voice power amplifying chip is arranged on the voice power amplifier,
the VDD pin of the voice power amplification chip is connected with the output end of the power supply chip, and then is grounded after passing through a capacitor C1, a capacitor C2 and a capacitor C3 which are connected in parallel;
the Bypass pin of the voice power amplification chip is grounded after passing through a decoupling capacitor, and the CTRL pin of the power amplification chip is connected with the output end of the power chip through a resistor R30 after being connected with the decoupling capacitor in parallel through a resistor R13;
and an OUT + pin and an OUT-pin of the voice power amplification chip are connected with an output interface of the circuit board.
2. The car turns to voice broadcaster according to claim 1, characterized in that: and the power interface of the control box is connected with the power interface of the circuit board after being connected with the power switch in series.
3. The car turns to voice broadcaster according to claim 1, characterized in that: the signal connector is communicated with the signal input interface of the circuit board through a flat cable.
4. The car turns to voice broadcaster according to claim 1, characterized in that: the external interface is communicated with the output interface of the circuit board through a flat cable.
5. The car turns to voice broadcaster according to claim 1, characterized in that: the power supply chip is XL 6007.
6. The car turns to voice broadcaster according to claim 1, characterized in that: the power amplification chip is HM 8773.
7. The car turns to voice broadcaster according to claim 1, characterized in that: and the output interface of the circuit board is connected with a loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922442368.4U CN211765225U (en) | 2019-12-30 | 2019-12-30 | Automobile steering voice broadcast device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922442368.4U CN211765225U (en) | 2019-12-30 | 2019-12-30 | Automobile steering voice broadcast device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211765225U true CN211765225U (en) | 2020-10-27 |
Family
ID=72977670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922442368.4U Active CN211765225U (en) | 2019-12-30 | 2019-12-30 | Automobile steering voice broadcast device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211765225U (en) |
-
2019
- 2019-12-30 CN CN201922442368.4U patent/CN211765225U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105119482B (en) | The buck-boost type circuit and its control method of single inductance multi output | |
| CN205142150U (en) | Power amplifier circuit and amplifier device | |
| CN211765225U (en) | Automobile steering voice broadcast device | |
| CN201181977Y (en) | Booster circuit, radio-frequency head tuning voltage circuit and television set | |
| CN211151924U (en) | High-efficient low calorific capacity's multichannel voice prompt circuit | |
| CN101567627B (en) | Power supply module | |
| CN211765224U (en) | Automobile steering voice broadcast device circuit | |
| CN212243220U (en) | High-efficient low calorific capacity's multichannel voice prompt device | |
| CN2819617Y (en) | DC booster power-supply circuit | |
| CN106300905B (en) | Switch converter and control circuit thereof | |
| CN204376704U (en) | Control circuit for voltage converter | |
| CN211352536U (en) | Constant current load circuit, backlight adjusting circuit, driving board card and electronic equipment | |
| CN202975965U (en) | Direct current voltage converting circuit | |
| CN204258628U (en) | A kind of booster circuit of the efficient high power be applied in electronic cigarette | |
| CN106452054A (en) | Buck-boost DC/DC converter and buck-boost control method thereof for circuit system | |
| CN204156227U (en) | A kind of vehicle-mounted socket | |
| CN2909728Y (en) | DC step-up voltage-stablized source and TV.set with the power supply circuit | |
| CN103825439A (en) | Buck converter circuit | |
| US20100183166A1 (en) | External car amplifier capable of producing high power | |
| CN203251306U (en) | RDS frequency modulation broadcast addressable terminal | |
| CN201797488U (en) | Novel digital input power amplifier | |
| CN105704620B (en) | A kind of audio output circuit | |
| CN201430531Y (en) | Voltage stabilizing circuit and TV set with same | |
| CN209994277U (en) | Direct current conversion circuit and direct current converter | |
| CN206322052U (en) | A kind of high-efficiency magnetic tuning device drive circuit of tracking with voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |