Dc / dc electronic stabilizer, applied in automotive infotainment equipment.

Description

[01] This patent application report falls within the field of automotive electronics, more precisely in the automotive infotainment area (information and entertainment equipment), and refers to an electronic circuit, considering constructive variations between unipolar, bipolar, analog and / or digital semiconductors, and in any encapsulation models, which is intended to “stabilize the electrical voltage at the Memory / Power (A4) and Acc / Activation (A7) inputs of the automotive infotainment equipment, during the process (procedure / mode) for ignition of the vehicle's engine; preventing said equipment from being abruptly switched off at the moment of ignition of the vehicle's engine (Start)”. STATE OF THE ART.

[02] It is known in the automotive field, being a repair technician and / or electrician of vehicles, that an automotive battery, being in perfect working order and fully charged, has an electrical voltage between 12.3 Volts and 12.8 volts when at rest (Source1).

[03] It is also known to vehicle repair technicians and / or electricians that, at the moment of ignition of the vehicle engine (Start), due to the high electrical load consumed by the starter motor (with consumption peaks in the hundreds of amperes at the beginning of engine ignition), there is a sharp drop in the electrical voltage of the battery and that, at this moment, depending on the characteristics and technical specifications of the battery, the voltage of said battery can fall below 09 Volts (Source2). 1https: / / www.moura.com.br / blog / teste-de-bateria2https: / / omecanico.com.br / carga-e-partida-verifique-a-saude-da-bateria-e-do-alternador Petition 870250073527, dated 08 / 20 / 2025, page 4 / 31 / 22

[04] It is also known in the automotive field, being a technician installing automotive audio and / or video equipment and also a vehicle repair technician and / or electrician, that the aforementioned drop in electrical voltage that occurs in the battery at the moment of ignition of the vehicle's engine (Start) also occurs in the fuse box component and in the ignition switch component, which are the electrical components that power and / or activate the vehicle's electrical and / or electronic equipment; highlighting that, due to the operating characteristics of the ignition switch, during the transition from the ACC or ON position to the Start position of said switch (moment of activation of the starter motor / start and ignition of the engine), the aforementioned electrical and / or electronic equipment is deactivated; including the Infotainment equipment.

[05] It is also known to the technician installing automotive audio and / or video equipment and / or accessories in vehicles, and is also specified in the manuals of Infotainment equipment, that, depending on the characteristics of each piece of equipment (brand - model - electronic design - resources / functions), said equipment will require, for its operation, minimum voltages between 9 Volts and 10.8 Volts at the Memory / Power and Acc / Activation inputs; and that, if the electrical voltage at said inputs is interrupted and / or is below the minimum required voltage, said equipment will not function! Clarification No. 1.

[06] For a better understanding of the state of the art and a better future understanding of the inventive solution, the subject of this patent application report, a brief description of the process (procedure / method) for igniting the vehicle's engine (hereinafter, engine ignition process) is necessary; as well as the electrical components of the vehicle that power and / or activate the infotainment equipment (hereinafter, multimedia device), being Petition 870250073527, dated 08 / 20 / 2025, page 5 / 31 / 22 describes the electrical connections between both, which, housed in the space reserved for the Multimedia device on the vehicle's dashboard, must be connected according to ISO410487-A standard (Multimedia device connector) and DIN5 72552 standard (automotive electrical); as well as making reference to the conductor wire for activating peripheral accessories, which is also integrated into connector 10487-A. THE PROCESS FOR IGNITING THE VEHICLE'S ENGINE. Through an electromechanical switch (metal blade switch).

[07] The engine ignition process begins after inserting the vehicle key (metal blade) into the electromechanical ignition switch. Initially, starting from the OFF position and turning the key clockwise, you reach the first position of the switch (ACC position), activating (turning on) some vehicle accessories (including the multimedia system). Continuing to turn the key, you reach the second position of the switch (ON position), activating (turning on) the entire vehicle's onboard electronics system (ECUs, ECM, BCM, headlights, air conditioning, among others). Finally, continuing to turn the key, you reach the third position of the switch (Start position); at which point the aforementioned electrical and / or electronic equipment is deactivated and the starter motor is activated (the moment the vehicle's engine is ignited - Start).

[08] It is worth noting here that, due to the operating characteristics of the switch, during the transition from the ACC position or ON position to the Start position of the switch (moment of activation of the starter motor / start and ignition of the engine), the aforementioned electrical and / or electronic equipment is deactivated; including the Infotainment equipment. 3https: / / pt.wikipedia.org / wiki / Console_central4https: / / commons.wikimedia.org / wiki / File:ISO_10487_connector_pinout.svg5http s: / / en. wikip edia.org / wiki / DIN_72552 Petition 870250073527, dated 08 / 20 / 2025, page 6 / 31 / 22 Through an electronic switch (Engine Start Button).

[09] The engine ignition process begins after inserting an electronic card, or bringing an electronic key fob close to the vehicle. Initially, pressing the Engine Start Button once moves the switch to the first position (ACC position), activating some vehicle accessories (including the multimedia system). Then, pressing the Engine Start Button a second time moves the switch to the second position (ON position), activating all the vehicle's onboard electronic systems (ECUs, ECM, BCM, headlights, air conditioning, among others).Finally, pressing the Engine Start Button for the third time reaches the third position of the switch (Start position); at this point, the aforementioned electrical and / or electronic equipment is deactivated and the starter motor is activated (the moment the vehicle's engine is ignited - Start).

[010] It is worth reiterating here that, due to the operating characteristics of the switch, during the transition from the ACC or ON position to the Start position of the switch (moment of activation of the starter motor / start and ignition of the engine), the aforementioned electrical and / or electronic equipment is deactivated; including the Infotainment equipment. From the vehicle's electrical components. Fuse box.

[011] Panel composed of safety relays and fuses, partially controlled by the ignition switch, “responsible for distributing the voltage from the battery, through line 30, to power the vehicle’s electrical and / or electronic equipment, installed in the vehicle; including the Infotainment equipment”. Petition 870250073527, dated 08 / 20 / 2025, page 7 / 31 / 22 SWITCH.

[012] Electromechanical component, for actuating electrical and / or electronic equipment and activating the starter motor for ignition of the vehicle engine, controlled by a mechanical key in the form of a metal blade and operating by turning said key clockwise / counterclockwise to change between the OFF, ACC, ON and Start positions; composed of electrical contacts for: voltage input (from the battery / line 30); voltage output (ACC lines and / or line 15) to activate or electrically power the electrical and / or electronic equipment on board the vehicle, including the Infotainment equipment; and voltage output (line 50) to actuate the starter motor that will perform the starting / ignition of the engine of said vehicle.

[013] Electro-electronic component, for operating electrical and / or electronic equipment and activating the starter motor for ignition of the vehicle's engine, controlled by an electronic key in the form of a key fob or card and operating by pressing the ignition button (engine start button) to change between the OFF, ACC, ON and Start positions; composed of electrical contacts for: voltage input (from battery line 30); voltage output (ACC lines and / or line 15) to activate or electrically power the electrical and / or electronic equipment on board the vehicle, including the Infotainment equipment; and voltage output (line 50) to activate the starter motor that will perform the starting / ignition of the engine of said vehicle. OF THE ELECTRICAL COMPONENT OF THE MULTIMEDIA DEVICE. Electric whip.

[014] Connector composed of electrical conductors (wires) intended for connection to the vehicle's electrical components (switch and / or fuse box); as well as intended for connection to the device's peripheral accessories. Regarding the connections between the electrical components. Petition 870250073527, dated 08 / 20 / 2025, page 8 / 31 / 22

[015] — Yellow electrical conductor wire (A4), MEMORY / POWER input, of the ISO-A connector of the Multimedia device, hereinafter in this report: POWER (A4AM): is connected to line 30 - DIN standard - coming from the vehicle's fuse box.

[016] — Red electrical conductor wire (A7), ACC / Activation input, from the ISO-A connector of the Multimedia device, hereinafter in this report: ACTIVATION (A7-VM); is connected to the ACC line or to line 15 - DIN Standard - coming from the vehicle's ignition switch.

[017] — Black electrical conductor wire (A8), ground / GND input, from the ISO-A connector of the Multimedia device, hereinafter in this report: GND (A8-PT); is connected to line 31 DIN Standard - of the vehicle.

[018] — Blue electrical conductor wire (A5), remote / antenna output, from the ISO-A connector of the Multimedia device, hereinafter in this report: remote (A5-AZ); is connected to the input for activating the peripheral accessories of said device. Clarification No. 2.

[019] It is also necessary to briefly explain the distinction between the power supply inputs on the Multimedia device's Power (A4-AM) and Activation (A7-VM) inputs; noting that, due to the difference in their functionalities, there will be different power consumption (electrical current) through the Power input (A4-AM) (yellow conductor wire of the ISO-A connector) and through the Activation input (A7-VM) (red conductor wire of the ISO-A connector), as follows:

[020] - Power Input (A4-AM) (yellow wire of the ISO-A connector of the Multimedia device) is connected to line 30 (DIN standard) of the vehicle, and depending on the brand - design - model - features / functions of the Multimedia device, a minimum electrical voltage between 9 and 10.8 Volts is required for the device to function; its function / purpose is: the uninterrupted supply of electrical voltage to power the motherboard of the Multimedia device, where the BIOS, flash memory and real-time clock are located; and also, when the Multimedia device is activated, the supply of electrical voltage to power the Microcontroller (MCU), the Bluetooth system board, and the Petition 870250073527, dated 08 / 20 / 2025, page 9 / 31 / 22 hands-free system (Smartphone connection), for the audio output amplifier circuit, for the peripheral accessory drive circuit and for other embedded physical parts (Hardware) in said device, such as the Screen (screen / monitor), the Cooler (Fan), among others; and, “when the Multimedia device is not activated / turned on, the electrical current consumption through this input is minimal, being around 02 to 05 Microamps (μA)”; and, conversely, “when the Multimedia device is activated / turned on, the electrical current consumption through this input reaches up to 10Ah of consumption”.

[021] Note: “The variation in electrical current consumption through this input is also related to the characteristics of the loads (speakers) connected to the outputs of the audio amplifier circuit of the device (which, depending on the equipment, can reach 120 watts RMS of power); it is also related to the frequency range of the sound wave (Hertz) and the sound intensity (sound volume / dB) required from the device by the user; for example: the larger the magnetic assembly and the lower the impedance of the speaker, the smaller the frequency range of the sound wave (Hertz), and the higher the sound intensity (sound volume / dB) required from the multimedia device's amplifier circuit, the greater the electrical current consumption through the POWER SUPPLY input (A4-AM) (yellow wire).”

[022] - Activation Input (A7-VM) (red wire from the ISO-A connector of the Multimedia device) is connected to the ACC line or line 15 (DIN standard) of the vehicle's ignition switch, having the function / purpose of: “turning the Multimedia device on and / or off (via the ignition key, when said key is turned and positioned in ACC / on or OFF of the vehicle's ignition switch)”; as well as monitoring the battery voltage, through the internal undervoltage protection circuit* (with the ignition key in the ACC or ON position of the vehicle's ignition switch); and the voltage at the Activation Input (A7-VM), coming from the ACC line or line 15, will also activate and / or enable the device's Hardware, such as: the Cooler (Fan), the Screen (screen / monitor), the parking sensor, the reversing camera, the audio output amplifier circuit, among others; as well as the aforementioned tension, Petition 870250073527, dated 08 / 20 / 2025, page 10 / 31 / 22 will activate and / or enable the Operating System (OS) and native applications of the Multimedia device, such as: GPS navigation system, Digital TV, Bluetooth system and / or hands-free system, among others; it will also activate and / or enable, through the blue electrical conductor wire (A5-AZ) of the ISO-A connector, peripheral accessories, such as: video game console / electronic games, amplification module(s), digital processor, among others; and, "while the Multimedia device is switched off, through the ignition key (vehicle switch in the OFF position), there will be no consumption of electrical current through this input"; However, "when the multimedia system is activated (vehicle switch in the ACC or ON position), the electrical current consumption through this input may reach 900mAh (depending on the brand, model — features / functions)." Clarification No. 3. *Regarding the internal undervoltage protection circuit of the Multimedia device:

[023] - The internal protection circuit of the Multimedia device is designed to prevent damage to the battery in case of excessive use of the Multimedia device while the vehicle is stationary and the engine is off. The activation of the protection circuit and the deactivation of the device will occur when "the value of the electrical voltage coming from the battery, through the ACC line or line 15, falls below the electrical voltage for activating the device, which, predefined by the manufacturer of the device, is around 10.8 Volts to 11 Volts at the Activation input (A7-VM)". Regarding the implications.

[024] As previously mentioned: the sharp drop in battery voltage at the moment the vehicle engine is started, as mentioned in paragraph 03, and the drop in voltage that occurs on the ACC line and / or line 15 during the transition from the ACC position or ON position to the Start position of the switch, as mentioned in paragraph 04, cause the abrupt and temporary shutdown of the device, due to the lack of minimum voltage at the Power input (A4AM, as mentioned in paragraph 05); or due to the lack of minimum voltage in Petition 870250073527, dated 08 / 20 / 2025, page 11 / 31 / 22 Activation input (A7-VM), causing the activation of the undervoltage protection circuit, as mentioned in the previous paragraph. This results in temporary interruptions in the resources / functions of the Multimedia device, described in paragraph 020; as well as the temporary deactivation of peripherals activated by the remote output (A5-AZ), described in paragraph 022; causing inconvenience to users, who have their entertainment abruptly interrupted at the moment the vehicle's engine is started. However, the problems are more pronounced when the vehicle is equipped with an automatic system to turn the engine off / on during stops and starts at traffic lights and / or in traffic jams (Start&Go - Start-Stop - Stop-Start), where occurrences of undervoltage on line 30 and on line ACC or line 15 are more frequent. Of the solutions found so far, which are part of the state of the art. Capacitor bank. Document PI0805293-0

[025] Document PI0805293-0 addresses the topic with the possibility of applying capacitor banks that, installed between the vehicle's electrical connections and the electrical connections of the audio and / or video equipment, correct the sharp drop in electrical voltage that occurs at the Power and Activation inputs at the moment the vehicle's engine is started.

[026] However, although the capacitor bank in document PI0805293-0 demonstrates the possibility of solving the problem of sharp voltage drop at the aforementioned inputs, this possibility, as proposed in the document, proves to be viable and efficient only in equipment that consumes low electrical currents, such as the equipment described in lines 8 and 9 of the report in the document (Radio - CD Players - DVD Players, LCD screens, [...]), which are equipment that consume low currents. Petition 870250073527, dated 08 / 20 / 2025, p. 12 / 31 / 22 electrical, through the aforementioned inputs; this is due to the few resources / functions available on these devices; as well as due to the low sound power generated at their audio outputs.

[027] It is worth noting that the capacitor bank proposed by the aforementioned document proves to be inefficient in supplying the load consumption of the Power input of a Multimedia device; which is a device that consumes high electrical current, due to the various existing features / functions and the high sound power generated in the audio outputs of said device. Furthermore, to reiterate, “the current consumption of a multimedia device, through the Power input, can reach up to 10Ah of battery charge when the device is fully operational”, as described in paragraph 020 of this report.It should be noted that, in order for the capacitor bank in document PI0805293-0 to supply the power consumption of a multimedia device when the device is fully operational, the load capacity of the capacitor bank must be high, exceeding several Farads! This is to prevent the multimedia device from being abruptly switched off when the vehicle's engine is started.

[028] Thus, despite being a solution for the sharp voltage drop at the aforementioned multimedia device power input, the capacitor bank becomes a less viable solution to avoid said voltage drop. This is due to the high financial cost of achieving the charging capacity in a capacitor bank that can supply the load consumed by the multimedia device power input. It is also worth noting that, due to the high charging capacity required to avoid said voltage drop at the moment of ignition of the vehicle's engine (Start), said capacitor bank must be encased in a space / compartment that, due to the resulting physical dimensions (size), must be installed in a space / compartment distinct from the passenger compartment originally intended for housing the electrical connections between the multimedia device and the vehicle (console / space reserved for the device, on the dashboard / dashboard of the vehicle). Petition 870250073527, dated 08 / 20 / 2025, page 13 / 31 / 22 (vehicle). Therefore, the original electrical connections between the multimedia device and the vehicle cannot be maintained. Document BR102021020137-1

[029] Document BR102021020137-1 deals with an electronic circuit intended to correct the inefficiency and / or inaccuracy of the capacitor bank charge at the Multimedia device's Activation input; and aiming to control, efficiently and precisely, through a Drive component, the charge of the capacitor bank at the Activation input of the Multimedia device, to “prevent the activation of the internal protection circuit of said device” at the moment of ignition of the vehicle's engine (Start), as well as to “prevent the capacitor bank from generating the time delay in turning off (Off delay time) said device, after the ignition key is removed from the vehicle's ignition switch”.

[030] Thus, document BR102021020137-1 does not address the load capacity of the capacitor bank to prevent voltage drop at the Power input and the consequent deactivation of the Multimedia device at the moment the vehicle engine is started. From the invention. From the inventive circuit, the subject of this application.

[031] The present invention, DC / DC electronic stabilizer, is an electronic circuit which, including a voltage switching module, activation and / or deactivation modules, a timed control module and a voltage converter module for feedback (in a boost topology), has specific operating characteristics to prevent the abrupt shutdown of the Multimedia device at the moment the vehicle engine is started.

[032] It should be noted that the DC / DC electronic stabilizer circuit can be installed in an enclosure or directly on the printed circuit board of the multimedia device. When installed in an enclosure, it can be connected to the vehicle's electrical system (lines 30 and 15). Petition 870250073527, dated 08 / 20 / 2025, page 14 / 31 / 22 and the electrical system of the Multimedia device (Power and Activation inputs), on the assembly line of said vehicle or in automotive accessories stores (Aftermarket). Alternatively, when contemplated in the electronic design of the Multimedia device, it may be implemented on the printed circuit board of the Multimedia device at the time of production / manufacturing of said device. Purpose of the invention.

[033] The “DC / DC electronic stabilizer”, the subject of this patent application report, aims to: stabilize the electrical voltage at the Power (A4-AM) and Activation (A7-VM) inputs of the Multimedia device, during the engine ignition process; solving the problems (implications) described in paragraph 024 of this report.

[034] It should be noted that, to achieve the objective, the “DC / DC electronic stabilizer” includes the following modules in its electronic design:

[035] - (A) voltage switching module.

[036] - (B) module for primary / secondary activation.

[037] - (C) module for deactivation by voltage monitoring.

[038] - (D) timed control module.

[039] - (E) voltage converter module for feedback. From the advantages of the inventive circuit to prior art.

[040] In the functional field, the DC / DC electronic stabilizer, by including a DC-DC converter circuit in its electronic circuit, provides greater energy efficiency - compared to the electrical load capacity of the capacitor bank, to avoid the voltage drop that occurs at the Power (A4-AM) and Activation (A7-VM) inputs of the Multimedia device, at the moment of ignition of the vehicle engine (Start).

[041] In the industrial, commercial and functional field, the DC / DC electronic stabilizer is advantageous; as it will meet the load consumption of the models of Petition 870250073527, dated 08 / 20 / 2025, page 15 / 31 / 22 A / V equipment, described in document PI0805293-0, regarding the power consumption of the Multimedia devices, described in paragraphs 020 and 022 of this document; will also, at the same time, meet what is proposed in document BR102021020137-1. In this way, a single project, or product, will meet all known situations that, to date, are part of the state of the art.

[042] Still in the industrial, commercial and functional field, the DC / DC electronic stabilizer is advantageous; because, when encased in a housing, it is a solution with reduced physical dimensions (compared to the capacitor bank), allowing its fixation and electrical connections in the same space reserved for the Multimedia device, on the vehicle's dashboard, and it can be connected at the time of vehicle production / assembly, or later, in automotive accessories stores (Aftermarket).

[043] In the industrial and commercial field, the DC / DC electronic stabilizer is advantageous; because, when implemented on the printed circuit board of the multimedia device, it will add greater financial value to said device, generating greater profit for its manufacturer. From the diagrams and descriptions of the circuit.

[044] In order to clarify the idea of ​​the inventive circuit and describe the characteristics of its operation during the engine ignition process, some figures will be presented and, among them, an electrical diagram in constructive arrangement with analog components; where: Descriptions of the figures.

[045] Figure 1 shows a block diagram, displaying modules (A); (B); (C); (D) and (E).

[046] Figure 2 shows the electrical diagram of the DC / DC electronic stabilizer divided into modules and in analog constructive variation, among other possibilities. Petition 870250073527, dated 08 / 20 / 2025, page 16 / 31 / 22 Descriptions of the modules and their functionalities, as shown in Figure 2.

[047] Voltage switching module (A): with transistors (Q-1) and (Q-2) activated at their Base terminals by the ACC line or by line 15 (15X) of the vehicle's switching system, via input port (e-15); with transistors (Q-3) and (Q-4) continuously powered at their Source terminals by line 30 and fed back by the voltage-to-feedback converter module (E), via direct power input port (A-5); with transistors (Q-3) and (Q-4) activated by transistors (Q-1) and (Q-2); The voltage switching module (A) has the function of: “switching the electrical voltage, coming from line 30 and / or the voltage converter module for feedback (E), to: activate the module for primary / secondary activation (B), through the Drain terminal of the transistor (Q-3), via the switched activation output port (A-1); powering the timed control module (D), also through the Drain terminal of the transistor (Q-3), via the switched power supply output port (A-3);and activate (turn on) the Multimedia device, through the Drain terminal of the transistor (Q-4), via the switched power output port (AS7) to the Activation input (A7-VM) of the Multimedia device.

[048] Module for primary / secondary activation (B): being activated by the voltage switching module (A), through the transistor (Q-3), via the input port (B1); being equipped with a voltage comparator for monitoring the ACC line or line 15 (15X) of the switch, through the input port (e-15); The primary / secondary activation module (B) has the function, during the engine ignition process: “to activate with 01 (one) electrical pulse (non-continuous and / or non-intermittent) the timed control module (D), through the Collector terminal of the transistor (Q-5), via the output port (B-3); to monitor the voltage on the ACC line or line 15 (15X) of the switch and, if a voltage drop occurs at the input port (e-15) at the moment of transition from the ACC position and / or ON position to the Start position of the switch, to activate with 01 (one) electrical pulse (non-continuous and / or non-intermittent) the timed control module (D), through the Collector terminal of the transistor (Q5), via the output port (B-3)”. Petition 870250073527, dated 08 / 20 / 2025, page 17 / 31 / 22

[049] Voltage monitoring deactivation module (C): activated by the ACC line or line 15 (15X) of the switch, via input port (e-15); the voltage monitoring deactivation module (C), which includes a voltage comparator in its circuit, has the function, after the engine ignition process: “to monitor the voltage on line (30), through the input port (e-30), and at the moment the vehicle alternator starts up, to deactivate the timed control module (D) with an electrical pulse, through the Collector terminal of the transistor (Q-6), via output port (C-1)”.

[050] Timed control module (D): continuously powered by line 30 and fed back by the voltage converter module for feedback (E), via direct power input port (D-5); also powered by the voltage switching module (A), through the Drain terminal of the transistor (Q-3), via monitored switched power input port (D-4); the input port (D-4) being equipped with a voltage comparator; being a timed circuit and pulse width modulator (PWM) signal generator; being activated by the module for primary / secondary activation (B), through the Collector terminal of the transistor (Q-5), via input port (D-3); also, if a voltage drop occurs on line (15X), it is reactivated by the module for primary / secondary activation (B), through the aforementioned Collector terminal of the transistor (Q-5), via input port (D-3);being deactivated due to the predefined time in the circuit, or being deactivated by the voltage monitoring deactivation module (C), through the Collector terminal of the transistor (Q-6), via the input port (D-1); the timed control module (D) has the function, during the engine ignition process: “to compare the voltage coming from the voltage switching module (A) through the port (D-4) and, when activated by the module for primary / secondary activation (B), to control the voltage converter module for feedback (E), through the Drain terminal of the transistor (Q-7), via the output port (D-2)”.

[051] Note 1: It should be noted that the circuit of the aforementioned module (D) is equipped with a timer. The adoption of the timer in the circuit is essential to avoid interference in the electrical measurements. Petition 870250073527, dated 08 / 20 / 2025, pages 18 / 31 / 22 during vehicle maintenance / revisions; including interference with the Power Latch system.

[052] Voltage converter module for feedback (E): powered by line 30, via input port (e-30); Controlled by the timed control module (D), through the Drain terminal of the transistor (Q-7), via the input port (E-2), the voltage-to-feedback converter module (E) has the function, during the engine ignition process: “to convert the electrical voltage coming from line 30, via the input port (E-30), raising and stabilizing the voltage at the output ports (E-3), (E-1) and (E-S4): to: electrically feed back the Source terminals of the transistors (Q-3) and (Q-4) of the voltage switching module (A) via the direct power supply output port (E-3); to electrically feed back the timed control module (D) via the direct power supply output port (E-1); as well as to electrically feed back the Power input (A4-AM) of the Multimedia device, via the direct power supply output port (E-S4)”.

[053] It is worth noting here that the inventive circuit “DC / DC electronic stabilizer” is not limited to just one constructive arrangement; the electrical diagram presented in this report is an example of a “constructive arrangement with analog components”. Therefore, the circuit may also be improved with the addition and / or replacement of analog, digital (Microcontroller), electromechanical and / or electromagnetic components; as well as the possibility of replacing BJT transistors with FET transistors and vice versa.

[054] It should also be noted that the inventive circuit “DC / DC ELECTRONIC STABILIZER” includes, in its design, modules for undervoltage, overvoltage and overload protection. However, since they are already widely known (state of the art) and are not the subject of applications, they will not be listed in this report. Petition 870250073527, dated 08 / 20 / 2025, page 19 / 31 / 22 Operating characteristics are shown in Figure 2. Regarding activation and / or deactivation modes: Primary activation; Acc position or ON position of the switch:

[055] Activated with a voltage signal from the ACC line or line 15 (15X) of the vehicle's switch, the voltage switching module (A), which is powered by line 30 and fed back by the voltage-to-feedback converter module (E), will switch the electrical voltage to: power the timed control module (D), activate the module for primary / secondary activation (B) and activate the Activation input (A7-VM) of the Multimedia device.

[056] After being activated, the primary / secondary activation module (B) will activate the timed control module (D) which, powered by line 30 and the voltage switching module (A), will activate, for a period of time predefined in the project, the voltage converter module for feedback (E) which, by raising and stabilizing the electrical voltage at its outputs (E-1), (E-3) and (E-S4), will feed back the timed control module (D) and the voltage switching module (A); and will also feed back the Power input (A4-AM) of the Multimedia device. In this way, the output (A-S7) of the voltage switching module (A) and the output (E-S4) of the aforementioned voltage converter module for feedback (E) will be feeding back the activation input (A7-VM) and Power input (A4-AM) of the Multimedia device; thus avoiding, at the moment of ignition of the vehicle's engine (Start), the occurrences (implications) mentioned in paragraph 024 of this report. Secondary activation; switch start position - motor start:

[057] When there is a voltage drop on the ACC line or line 15 (15X), at the moment of transition from the ACC position and / or ON position to the Start position of the switch, the primary / secondary activation module (B) will activate the timed control module (D) which, powered by line 30 and the voltage switching module (A), will activate, for a period of time predefined in the project, the voltage converter module for feedback (E) which, by raising and stabilizing the electrical voltage at its outputs (E-1), (E-3) and (E-S4), will provide feedback to the control module. Petition 870250073527, dated 08 / 20 / 2025, page 20 / 31 / 22 timed (D) and the voltage switching module (A); which will also feed back the Power input (A4-AM) of the Multimedia device. Thus, the output (A-S7) of the voltage switching module (A) and the output (E-S4) of the aforementioned voltage converter module for feedback (E) will be feeding back the Activation (A7-VM) and Power inputs (A4-AM) of the Multimedia device; thus avoiding, at the moment of ignition of the vehicle engine (Start), the occurrences (implications) mentioned in paragraph 024 of this report. Timed deactivation:

[058] When activated, the inventive circuit will be deactivated when the preset time of the timed control module (D) has elapsed. Deactivation via battery voltage monitoring:

[059] When activated, the inventive circuit will be deactivated when the vehicle's alternator (D3) starts up; said operation being detected via line 30 by the voltage monitoring deactivation module (C). Deactivation via the vehicle's ignition switch:

[060] When activated, the inventive circuit will be deactivated when the electrical voltage signal at the input (e-15) of the voltage switching module (A), coming from line Acc or line 15 (15X) of the vehicle's switch, ceases. From the diagrams of the electrical connections.

[061] In order to describe the electrical connection method of the inventive circuit (when embodied in an enclosure) between the vehicle's electrical components and the multimedia device's wiring harness, some figures will be presented; as well as the usability method. Descriptions of the figures.

[062] Figure 3 shows the vehicle's electrical system, where:

[063] - (3A) battery.

[064] - (3B) fuse box.

[065] - (3C) vehicle switch (side view). Petition 870250073527, dated 08 / 20 / 2025, page 21 / 31 / 22

[066] - (3D) vehicle switch (front view).

[067] - (3D1) vehicle switch OFF position.

[068] - (3D2) ACC position of the vehicle switch.

[069] - (3D3) ON position of the vehicle switch.

[070] - (3D4) Vehicle switch Start position.

[071] - (3E) vehicle alternator.

[072] - (30) line 30 - +12 Volt output through the fuse box.

[073] - (15X) ACC line and / or line 15 - +12 Volt output via vehicle switch.

[074] - (31) line 31 - earth / ground of the electrical system.

[075] Figure 4 shows the electrical system of the Multimedia device and the peripheral accessory, where:

[076] - (4A) Multimedia device.

[077] - (4B) Multimedia device wiring harness.

[078] - (4C) example of peripheral accessory.

[079] - (A4-AM) Multimedia device power input.

[080] - (A7-VM) Multimedia device activation input.

[081] - (A8-PT) connection to line 31 - earth / GND.

[082] - (A5-AZ) voltage output, after activation of the device, for powering peripheral accessories.

[083] Figure 5 shows the vehicle's electrical system and the multimedia device's electrical system, connected to each other, where:

[084] - (15X) ACC line and / or line 15 of the vehicle's switch output is connected to the Activation input (A7-VM), red wire of the device's electrical harness.

[085] - (30) line 30 of the vehicle's electrical system is connected to the Power input (A4-AM), yellow wire of the device's electrical harness.

[086] - (31) line 31 of the vehicle's electrical system is connected to the GND input (A8PT), black wire of the device's electrical harness. Petition 870250073527, dated 08 / 20 / 2025, page 22 / 31 / 22

[087] Figure 6 shows the inventive circuit “ELECTRONIC STABILIZER” DC / DC” materialized in an enclosure, where:

[088] - (6A) stabilizer embodied in an enclosure.

[089] - (e-15) input for electrical voltage for activation.

[090] - (e-30) input for electrical voltage for power supply.

[091] - (e-31) ground / GND connection input.

[092] - (A-S7) electrical voltage output for the Activation input (A7-VM) of the Multimedia device.

[093] - (E-S4) electrical voltage output for the Power input (A4-AM) of the Multimedia device.

[094] Figure 7 shows the inventive “DC / DC electronic stabilizer” circuit connected between the vehicle’s electrical system and the multimedia device’s electrical system, where:

[095] - (15X) ACC line or line 15 of the vehicle switch, is connected to the (e-15) input of the stabilizer.

[096] - (30) line 30 of the vehicle's electrical system, is connected to the (e-30) input of the stabilizer.

[097] - (31) line 31 of the vehicle's electrical system is connected to the (e-31) input of the stabilizer and to the black wire GND input (A8-PT) of the Multimedia device.

[098] - (A-S7) of the stabilizer is connected to the Activation input (A7-VM) of the Multimedia device.

[099] - (E-S4) of the stabilizer is connected to the Power input (A4-AM) of the multimedia device.

[0100] It is important to highlight that, when the inventive circuit is implemented directly on the printed circuit board of the Multimedia device, the electrical connections between the inventive circuit and the Multimedia device will be made through the traces of said board and according to the electrical design developed by the manufacturer of said device. Therefore, the electrical connections will only be... Petition 870250073527, dated 08 / 20 / 2025, page 23 / 31 / 22 between the electrical components of the Multimedia device and the vehicle, as shown in figure 5. Operating characteristics are shown in Figure 7.

[0101] The operation of the inventive device will be described below, with reference to usability: Regarding activation and / or deactivation modes: Primary activation; ACC position and / or ON position of the switch:

[0102] Starting the engine ignition process, by turning the vehicle key (mechanical key or electronic key), from the OFF position (3D1) to the ACC position (3D2) and / or ON position (3D3) of the switch (3D), the electronic DC / DC stabilizer will be activated; raising the electrical voltage and keeping it stabilized, through the outputs (E-S4) and (A-S7), on the inputs (A4-AM) and (A7-VM) of the multimedia device.

[0103] Thus, with the voltage high and stabilized (during the predefined time) on the Power (A4-AM) and Activation (A7-VM) inputs of the multimedia device, even if a voltage drop occurs on the ACC line or line 15 (15X) during the transition from the ACC position (3D2) and / or ON position (3D3) to the Start position (3D4), or even if a voltage drop occurs on the battery (line 30) at the moment the vehicle engine is started; the occurrences (implications) mentioned in paragraph 024 of this report will be avoided. Secondary activation; Start position of the switch:

[0104] Once the engine ignition process has begun and is eventually interrupted to the ACC (3D2) and / or ON (3D3) position of the ignition switch (3D), and the vehicle key (mechanical or electronic key) is held in that position, the electronic DC / DC stabilizer will remain activated until the predefined time in the circuit has elapsed. After that time has elapsed, the electronic DC / DC stabilizer will be at rest and, if the engine ignition continues, at the moment the transition from the ACC (3D2) and / or ON (3D3) position to the Petition 870250073527, dated 08 / 20 / 2025, page 24 / 31 / 22 in the Start position (3D4) of the switch (3D), the electronic DC / DC stabilizer will be activated again; raising the electrical voltage again and keeping it stabilized at the outputs (E-S4) and (A-S7) that feed and activate, respectively, the inputs (A4-AM) and (A7-VM) of the multimedia device.

[0105] Thus, with the voltage high and stabilized at the Power (A4-AM) and Activation (A7-VM) inputs of the multimedia device, even if a voltage drop occurs on the ACC line or line 15 (15X) during the aforementioned transition, or even if a voltage drop occurs from the battery (line 30) at the moment the vehicle engine is started; the occurrences (implications) mentioned in paragraph 024 of this report will be avoided.

Claims

[01] “DC / DC electronic stabilizer”, applied in automotive infotainment equipment; being an electronic circuit, considering constructive variations between unipolar, bipolar, analog and / or digital semiconductors, and in any encapsulation models, intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device during the vehicle engine ignition process, to prevent the abrupt shutdown of said device at the moment of vehicle engine ignition (Start); characterized by including: voltage switching module (A); module for primary / secondary activation (B); module for deactivation by voltage monitoring (C); timed control module (D);and DC / DC voltage converter module for feedback (E). [02] “DC / DC ELECTRONIC STABILIZER”, APPLIED IN AUTOMOTIVE INFOTAINMENT EQUIPMENT, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device; according to claim 1, the voltage switching module (A) is characterized by: being activated by the ACC line or by line 15 (15X) of the vehicle's switch, via input port (e-15); being continuously powered by line 30 and fed back by the DC / DC voltage converter module for feedback (E), via input port (A-5); to switch the electrical voltage, coming from line 30 and / or the DC / DC voltage converter module for feedback (E) to: activate the module for primary / secondary activation (B), through the transistor (Q-3), via the switched activation output port (A-1);To power the timed control module (D), also through the transistor (Q-3), via the switched power output port (A-3); and to activate (turn on) the Activation input (A7-VM) of the Multimedia device, through the transistor (Q-4), via the switched power output port (A-S7). Petition 870250007890, dated 01 / 30 / 2025, pp. 29 / 39; 2 / 3 [03] “Electronic DC / DC stabilizer”, applied in automotive infotainment equipment, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device; according to claim 1, the primary / secondary activation module (B) is characterized by: being activated by the voltage switching module (A), via input port (B-1); monitoring the voltage on the ACC line or line 15 (15X) of the vehicle's switch, via input port (e-15); and activating the timed control module (D), through the transistor (Q-5), via output port (B-3).[04] “Electronic DC / DC stabilizer”, applied in automotive infotainment equipment, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device; according to claim 1, the deactivation module by voltage monitoring (C) is characterized by: being activated by the ACC line or line 15 (15X) of the vehicle's switch, via input port (e-15); monitoring the voltage on line (30), via input port (e-30); and deactivating the timed control module (D), through the transistor (Q-6), via output port (C-1).[05] “Electronic DC / DC stabilizer”, applied in automotive infotainment equipment, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device; according to claim 1, the timed control module (D) is characterized by: being a timed circuit and pulse width modulator (PWM) signal generator; being continuously powered by line 30 and fed back by the DC / DC voltage converter module for feedback (E), via input port (D-5); having a voltage comparator at input port (D-4); being powered by the switched voltage of the voltage switching module (A), via input port (D-4); being activated by the primary / secondary activation module (B), via input port (D-3); controlling the DC / DC voltage converter module for feedback (E), via output port (D-2); to be deactivated in Petition 870250007890, dated 01 / 30 / 2025, pages 30 / 39. 3 / 3 occurrence of the predefined time in the circuit; or be deactivated by the voltage monitoring deactivation module (C), via input port (D-1). [06] “Electronic DC / DC stabilizer”, applied in automotive INFOTAINMENT equipment, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device; according to claim 1, the DC / DC voltage converter module for feedback (E) is characterized by: being continuously powered by line 30, via input port (e-30); being controlled by the timed control module (D), via input port (E-2); converting the electrical voltage and feeding back: the voltage switching module (A), via output port (E-3); the timed control module (D), via output port (E-1); and the Power input (A4AM) of the Multimedia device, via output port (E-S4).[07] “Electronic DC / DC stabilizer”, applied in automotive INFOTAINMENT equipment, being an electronic circuit intended to stabilize the electrical voltage at the Power (A4) and Activation (A7) inputs of the Multimedia device, according to any of the previous / precedent claims, is characterized by: raising and stabilizing the electrical voltage at the Power (A4) input of the Multimedia device, through the DC / DC voltage converter module for feedback (E), via output port (E-S4); and raising and stabilizing the electrical voltage at the Activation (A7) input of the Multimedia device, through the voltage switching module (A), via output port (A-S7).

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