An electronic product state indication circuit, control method and electronic product
By using chip modules and signal stabilization modules to directly drive LED indicators in electronic products, the problems of high circuit complexity, high cost and large space occupation in the prior art are solved, and low power consumption and miniaturized circuit design are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING HUAHONG INTEGRATED CIRCUIT DESIGN
- Filing Date
- 2024-12-27
- Publication Date
- 2026-06-30
Smart Images
Figure CN122307206A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of status indication technology, and in particular to an electronic product status indication circuit, control method, and electronic product. Background Technology
[0002] In the design of modern electronic products, intuitive and accurate indication of the product's operating status not only helps users quickly understand the product's current condition but also provides crucial information during troubleshooting. LED indicator lights, due to their low power consumption, long lifespan, and ease of integration, have become a common method for indicating the status of electronic products.
[0003] In current integrated circuit design, the circuit design for driving LED indicators through the I / O ports of integrated circuits often uses an external transistor or MOSFET. The principle is as follows: when the I / O port outputs a high level, a conduction occurs between the base and emitter of the transistor, which in turn causes a conduction between the emitter and collector, thus lighting the LED; conversely, when the I / O port outputs a low level, the transistor is cut off, and the LED is off.
[0004] However, using transistors or MOSFETs to control the lighting and extinguishing of LEDs not only increases the complexity of the circuit but also raises the cost of raw materials, which is not conducive to the miniaturization of modules and cost control. Summary of the Invention
[0005] Therefore, it is necessary to provide a low-cost electronic product status indication circuit, control method, and electronic product.
[0006] In a first aspect, an electronic product status indication circuit is provided, comprising:
[0007] A chip module, wherein the chip module is used to provide control signals;
[0008] A signal stabilization module is provided, wherein a first terminal of the signal stabilization module is connected to the power supply voltage, a second terminal is grounded, and a third terminal is connected to the signal transmission port of the chip module. The signal stabilization module is used to adjust the current of the signal transmission port so that when the power supply voltage of the chip module changes within a first preset range, the control signal is stabilized within a second preset range.
[0009] The indicator module has a first end connected to both the signal transmission port and the third end of the signal stabilization module, and a second end connected to the power supply voltage. The indicator module is used to indicate the operating status of the electronic product based on the control signal and the power supply voltage.
[0010] In one embodiment, the chip module includes:
[0011] The IC chip has its power supply pins connected to the power supply voltage, and its I / O ports are connected to the first end of the indicator module as signal transmission ports of the chip module. The IC chip is used to provide the control signal to the indicator module through the I / O ports.
[0012] In one embodiment, the signal stabilization module includes a first resistor and a second resistor;
[0013] One end of the first resistor is connected to the power supply voltage as the first terminal of the signal stabilization module. The other end of the first resistor is connected to one end of the second resistor. The other end of the second resistor is grounded as the second terminal of the signal stabilization module. The common terminal of the first resistor and the second resistor is connected to the signal transmission port and the first terminal of the indicator module as the third terminal of the signal stabilization module.
[0014] In one embodiment, the indication module includes:
[0015] A diode, wherein the cathode of the diode is connected to the IO port as the first terminal of the indicator module to receive the control signal, and the anode of the diode is connected to the power supply voltage as the second terminal of the indicator module. The diode is used to conduct or cut off according to the difference between the control signal and the power supply voltage to indicate the operating status of the electronic product.
[0016] In one embodiment, it further includes:
[0017] A current limiting module is connected between the indicator module and the power supply voltage, and the current limiting module is used to limit the branch current of the indicator module and the power supply voltage.
[0018] In one embodiment, the current limiting module includes:
[0019] A third resistor, one end of which is connected to the second terminal of the indicator module, and the other end of which is connected to the power supply voltage.
[0020] In one embodiment, it further includes:
[0021] A transformer module is provided, wherein the input terminal of the transformer module is connected to the power supply voltage, and the output terminal of the transformer module is connected to both the power supply port of the chip module and the second terminal of the indicator module. The transformer module is used to transform the power supply voltage into the supply voltage and provide it to the chip module and the indicator module.
[0022] In one embodiment, the first preset range includes 3.3~5.1V, and the second preset range includes 1.7~1.9V.
[0023] Secondly, a control method for an electronic product status indicator circuit is provided, applied to the electronic product status indicator circuit as described above, wherein the electronic product status indicator circuit is used to indicate the operating status of the electronic product, the operating status including a normal state and an abnormal state, and the method includes:
[0024] The power supply voltage is connected to the power port of the chip module and the second terminal of the indicator module, so that the signal transmission port of the chip module outputs a control signal;
[0025] When the control signal is at the first level, the indicator module is controlled to conduct according to the first difference between the first level and the power supply voltage to indicate the normal state of the electronic product;
[0026] When the control signal is at the second level, the indicator module is controlled to cut off based on the second difference between the second level and the power supply voltage to indicate the abnormal state of the electronic product.
[0027] Thirdly, an electronic product is provided, including the electronic product status indication circuit described above.
[0028] The aforementioned electronic product status indication circuit, control method, and electronic product, by incorporating a signal stabilization module, can stabilize the control signal of the chip module within a second preset range regardless of changes in the supply voltage within a first preset range, ensuring that the indication module can normally indicate the operating status of the electronic product. Furthermore, since the indication module is directly connected to the chip module and is directly driven by the level signal output by the chip module, the use of external components can be reduced, thereby reducing circuit complexity and significantly lowering hardware costs. At the same time, the reduction in external components and connection points facilitates a more compact circuit design, improves space utilization, and ultimately enables the miniaturization of electronic products. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a control block diagram of an electronic product status indication circuit according to one embodiment;
[0031] Figure 2 A circuit schematic diagram of an electronic product status indicator circuit according to one embodiment;
[0032] Figure 3 This is a control block diagram of an electronic product status indication circuit according to one embodiment;
[0033] Figure 4 A circuit schematic diagram of an electronic product status indicator circuit according to one embodiment;
[0034] Figure 5 This is a flowchart illustrating a control method for an electronic product status indication circuit according to one embodiment.
[0035] Explanation of reference numerals in the attached figures:
[0036] Chip module 101, signal stabilization module 102, indicator module 103;
[0037] IC chip U, first resistor R1, second resistor R2, diode LED;
[0038] Current limiting module 301, transformer module 302;
[0039] The third resistor is R3. Detailed Implementation
[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0042] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor R1 may be referred to as a second resistor R2, and similarly, a second resistor R2 may be referred to as a first resistor R1. Both the first resistor R1 and the second resistor R2 are resistors, but they are not the same resistor.
[0043] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.
[0044] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.
[0045] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.
[0046] As electronic products continue to evolve towards lower power consumption, more and more integrated circuits are adopting low-voltage designs. The voltage levels of integrated circuit I / O ports (Input / Output ports) have decreased from the traditional 3.3V to 1.8V or even lower. This change presents new challenges for controlling LED indicator lights. Since the startup voltage of LED indicator lights typically needs to reach approximately 2.5V, directly using the low-voltage I / O port levels to control the LED indicator lights is no longer feasible. Therefore, in order to meet the startup voltage requirements of LED indicator lights while ensuring the low power consumption design of the product, additional peripheral circuitry needs to be designed for the indicator lights to increase the output voltage level of the I / O ports, enabling them to meet the driving requirements of the LED indicator lights.
[0047] Traditional LED indicator circuit designs typically rely on the I / O ports of integrated circuits to directly output high and low levels to control the LED indicator's on / off state. The I / O ports of these integrated circuits are usually designed with an I / O level of 1.8V to meet the requirements of low power consumption and high integration. However, to drive the LED indicator to turn on and off normally, current integrated circuit designs often use an external transistor or MOSFET. When the control module's I / O port outputs a high level, the base and emitter of the transistor conduct, which in turn conducts between the emitter and collector, thus lighting the LED indicator. Conversely, when the I / O port outputs a low level, the transistor is cut off, and the LED indicator turns off.
[0048] However, the aforementioned circuit design has the following drawbacks:
[0049] First, the energy consumption is relatively high. Although the transistor or MOSFET can drive the LED indicator to work normally when it is in the conducting state, there is a certain on-resistance inside it. This will cause a voltage difference between the control module power supply voltage (such as 3.8V) and the actual working voltage of the LED indicator (usually much lower than 3.8V), thus generating unnecessary power consumption.
[0050] Secondly, the cost increases. The addition of transistors or MOSFETs not only increases the complexity of the circuit but also raises the cost of raw materials, which is not conducive to the miniaturization of the module and cost control.
[0051] Third, it occupies a lot of space. As electronic products increasingly make better use of space, the design of adding external components undoubtedly increases the space occupied by the module, which is not conducive to the thin and light design of the product.
[0052] Fourthly, there is the issue of reliability. Additional components and connection points may introduce potential points of failure, affecting the reliability and stability of the circuit.
[0053] Based on this, this application provides an efficient, economical, and reliable electronic product status indication circuit.
[0054] In one embodiment, such as Figure 1 As shown, an electronic product status indication circuit is provided, including a chip module 101, a signal stabilization module 102, and an indication module 103.
[0055] The power supply port of the chip module 101, the first terminal of the signal stabilization module 102, and the second terminal of the indicator module 103 are all connected to the power supply voltage VDD to power the chip module 101, the signal stabilization module 102, and the indicator module 103; the second terminal of the signal stabilization module 102 is grounded; the signal transmission port of the chip module 101 is connected to the third terminal of the signal stabilization module 102 and the first terminal of the indicator module 103.
[0056] The chip module 101 generates control signals, which are then provided to the indicator module 103 via a signal transmission port. This enables the indicator module 103 to indicate the operating status of the electronic product based on the control signals and the supply voltage VDD. The control signals are voltage level signals, and the indicator module 103 indicates the status based on the difference between the high and low level signals output by the chip module 101 and the supply voltage VDD. For example, a high level control signal indicates an abnormal state of the electronic product, while a low level control signal indicates a normal state. Conversely, a high level control signal indicates a normal state, while a low level control signal indicates an abnormal state. This embodiment uses a high level control signal indicating an abnormal state and a low level control signal indicating a normal state as an example.
[0057] The signal stabilization module 102 is used to adjust the current of the signal transmission port so that when the supply voltage VDD of the chip module 101 changes within a first preset range, the control signal is stabilized within a second preset range. The first preset range refers to the fluctuation range of the supply voltage VDD, and the second preset range refers to the fluctuation range of the control signal when the indicator module 103 indicates an abnormal state of the electronic product. When the supply voltage VDD changes within the first preset range, if the electronic product is abnormal, the signal stabilization module 102 can stabilize the control signal output by the chip module 101 within the second preset range, ensuring that the difference between the control signal and the supply voltage VDD cannot normally drive the indicator module 103, thereby indicating that the electronic product is operating abnormally.
[0058] Specifically, when the entire electronic product status indication circuit is powered on, the chip module 101, signal stabilization module 102, and indication module 103 are activated. The chip module 101 generates a control signal and provides it to the first terminal of the indication module 103 via the signal transmission port. The indication module 103 indicates the operating status of the electronic product based on the difference between the level of the control signal and the supply voltage VDD. For example, when the control signal is a high-level signal (i.e., a signal that varies within a second preset range), the difference between the level of the control signal and the supply voltage VDD is insufficient to drive the indication module 103, so that the indication module 103 is not turned on, thereby indicating the abnormal state of the electronic product and prompting that the electronic product is operating abnormally. When the control signal is a low-level signal (e.g., 0V), the difference between the level of the control signal and the supply voltage VDD can drive the indication module 103, thereby turning on the indication module 103, thereby indicating the normal state of the electronic product and prompting that the electronic product is operating normally.
[0059] During the operation of the chip module 101 and the indicator module 103, the signal stabilization module 102 can adjust the current of the signal transmission port so that when the electronic product is malfunctioning, no matter how the power supply voltage VDD changes within the first preset range, the control signal can be stabilized within the second preset range to indicate the abnormal state of the electronic product.
[0060] Understandably, in some other embodiments, the indicator module 103 may also indicate other states, such as charging state and charging complete state, on state and off state, etc.
[0061] In this embodiment, by setting a signal stabilization module 102, the control signal of the chip module 101 can be stabilized within a second preset range regardless of how the supply voltage VDD changes within a first preset range, so as to ensure that the indicator module 103 can normally indicate the operating status of the electronic product. Furthermore, the indicator module 103 is directly connected to the chip module 101, and the indicator module 103 is directly driven by the level signal output by the chip module 101. This reduces the use of external components, thereby reducing the complexity of the circuit and significantly reducing the hardware cost. At the same time, the reduction of external components and connection points facilitates a more compact circuit design, improves space utilization, and thus enables the miniaturization of electronic products.
[0062] In an optional embodiment, the first preset range includes 3.6~4.2V, and the second preset range includes 1.7~1.9V, preferably 1.8V; that is, when the supply voltage VDD varies between 3.6~4.2V, the control signal can be stabilized at 1.8V by adjusting the current of the signal transmission port through the signal stabilization module 102.
[0063] In one embodiment, such as Figure 2 As shown, the chip module 101 includes an IC chip U.
[0064] The power supply pin of IC chip U is connected to the supply voltage VDD, and the IO port of IC chip U is connected to the first end of indicator module 103 as the signal transmission port of chip module 101 to provide control signals to indicator module 103.
[0065] The IC chip U is used to provide control signals to the indicator module 103 through the IO port, that is, to provide a high-level signal or a low-level signal.
[0066] Specifically, when the power supply pin of IC chip U is connected to the supply voltage VDD, if the electronic product is normal, IC chip U generates a low-level signal at the IO port through its internal control logic, causing the indicator module 103 to conduct based on the difference between the supply voltage VDD and the low-level signal, thus indicating the normal state of the electronic product. If the electronic product is abnormal, IC chip U generates a high-level signal at the IO port through its internal control logic, causing the indicator module 103 to not conduct based on the difference between the supply voltage VDD and the high-level signal, thus indicating the abnormal state of the electronic product.
[0067] It is understood that the IC chip U in this embodiment can also be other IC chips U, such as microcontrollers, power chips, radio frequency chips, etc., and is not limited to the types mentioned in the above embodiments, as long as it has IO ports and can output high and low levels as control signals to provide to the indicator module 103 or needs to perform status indication.
[0068] In this embodiment, by setting up an IC chip U, control signals are directly output to the indicator module 103 through the IO port of the IC chip U to directly control the indicator module 103, which can effectively reduce the number of components and reduce hardware costs.
[0069] In one embodiment, the signal stabilization module 102 includes a first resistor R1 and a second resistor R2.
[0070] In this circuit, one end of the first resistor R1 serves as the first terminal of the signal stabilization module 102, connected to the power supply voltage VDD. The other end of the first resistor R1 is connected to one end of the second resistor R2, which serves as the second terminal of the signal stabilization module 102 and is grounded. The common terminal of the first resistor R1 and the second resistor R2 serves as the third terminal of the signal stabilization module 102, connected to both the signal transmission port and the first terminal of the indicator module 103. Specifically, the common terminal of the first resistor R1 and the second resistor R2 is connected to the I / O port of the IC chip U.
[0071] When the IO port outputs a high-level signal, the first resistor R1 and the second resistor R2 can adjust the current of the IO port through their resistance values, so that the high-level signal output by the IO port is less affected no matter how the supply voltage VDD changes within the first preset range.
[0072] It is understood that, in order to adjust the range of the control signal more flexibly, the first resistor R1 and the second resistor R2 can also be implemented as variable resistors, so as to adjust the resistance values of the first resistor R1 and the second resistor R2 according to the indication requirements or the specifications of the indication module 103 and the chip module 101, so as to ensure that the indication module 103 can accurately indicate the status of the electronic product.
[0073] In this embodiment, a first resistor R1 and a second resistor R2 are set. By setting or adjusting the resistance values of the first resistor R1 and the second resistor R2, the current of the signal transmission port can be dynamically adjusted. No matter how the power supply voltage VDD changes within a first preset range, the control signal can remain within a certain range with minimal impact, thereby ensuring the reliability and stability of the entire indicator circuit.
[0074] In one embodiment, the indicating module 103 includes a diode (LED).
[0075] In this module, the cathode of the LED serves as the first terminal of the indicator module 103 and is connected to the IO port, while the anode of the LED serves as the second terminal of the indicator module 103.
[0076] Among them, the diode (LED) is used to turn on or off according to the difference between the control signal and the supply voltage VDD to indicate the operating status of the electronic product.
[0077] Specifically, the diode (LED) is a light-emitting diode. The cathode of the diode (LED) is connected to the control signal, and the anode is connected to the power supply voltage VDD. When the control signal is high, the difference between the control signal and the power supply voltage VDD does not reach the conduction voltage of the diode (LED), so the diode (LED) is cut off and turns off, indicating that the electronic product is malfunctioning. When the control signal is low, the difference between the control signal and the power supply voltage VDD reaches the conduction voltage of the diode (LED), so the diode (LED) conducts and lights up, indicating that the electronic product is operating normally.
[0078] In this embodiment, by setting up a diode (LED), the status of the electronic product can be intuitively displayed by the on / off state of the diode (LED), so as to detect faults in a timely manner and take countermeasures.
[0079] In one embodiment, such as Figure 3 As shown, the above-mentioned electronic product status indication circuit also includes a current limiting module 301.
[0080] The current limiting module 301 is connected between the indicator module 103 and the power supply voltage VDD to limit the current in the branch where the indicator module 103 is located (i.e. the branch between the indicator module 103 and the power supply voltage VDD) to prevent the branch current from being too large and damaging the indicator module 103.
[0081] In this embodiment, by setting a current limiting module 301 on the branch of the indicator module 103, the indicator module 103 can be protected and the risk of damage to the indicator module 103 can be reduced.
[0082] In one embodiment, such as Figure 4 As shown, the current limiting module 301 includes a third resistor R3.
[0083] One end of the third resistor R3 is connected to the second end of the indicator module 103, and the other end of the third resistor R3 is connected to the power supply voltage VDD.
[0084] Specifically, one end of the third resistor R3 is connected to the anode of the diode LED, and the other end of the third resistor R3 is connected to the supply voltage VDD to limit the current flowing into the diode LED, prevent the diode LED from being damaged, and at the same time enable the diode LED to work under stable current conditions, thereby ensuring the stability and reliability of its working state, so as to ensure the normal realization of the entire circuit function.
[0085] In this embodiment, by setting the third resistor R3 as the current limiting module 301, the structure is simple and, while ensuring the reliability and stability of the circuit, it is conducive to further reducing hardware costs.
[0086] In one embodiment, the above-mentioned electronic product status indication circuit further includes a transformer module 302.
[0087] The transformer module 302 has its input terminal connected to the power supply voltage VIN, and its output terminal connected to both the power port of the chip module 101 and the second terminal of the indicator module 103. Specifically, the output terminal of the transformer module 302 is connected to the power pin of the IC chip U, the anode of the diode LED (or the end of the third resistor R3 furthest from the diode LED), and / or the end of the first resistor R1 furthest from the second resistor R2. Optionally, the power supply voltage VIN is 3.6~4.2V.
[0088] The transformer module 302 is used to transform the power supply voltage VIN into the supply voltage VDD and provide it to the chip module 101 and the indicator module 103. In specific implementation, the transformer module 302 can be implemented using an IC chip U or circuit capable of voltage conversion, such as a voltage regulator IC chip U, a voltage regulating IC chip U, etc.
[0089] Specifically, when the input terminal of the transformer module 302 is connected to the power supply voltage VIN, the power supply voltage is processed by the internal processing logic of the transformer module 302, including but not limited to filtering, boosting, bucking, and stabilizing. The power supply voltage VDD is output at the output terminal of the transformer module 302 to provide power to the IC chip U, the diode LED and the first resistor R1, so that the entire circuit starts to work.
[0090] In this embodiment, by setting up a transformer module 302, the power supply voltage VIN can be transformed into a supply voltage VDD to provide a matching working voltage for the chip module 101, indicator module 103, etc., so as to avoid damage to the device due to excessive voltage or failure of the device to work properly due to insufficient voltage.
[0091] In one embodiment, a control method for an electronic product status indicator circuit is provided, applied to the electronic product status indicator circuit as described in the above embodiment, to indicate the operating status of the electronic product, including a normal state and an abnormal state. The specific structure of the electronic product status indicator circuit can be found in the description of the above embodiments, and will not be repeated here.
[0092] like Figure 5 As shown, the method in this embodiment includes:
[0093] Step 501: The power supply voltage VDD is connected to the power port of the control chip module 101 and the second terminal of the indicator module 103, so that the signal transmission port of the chip module 101 outputs a control signal.
[0094] The power port is the port where the chip module 101 is connected to the supply voltage VDD to power the chip module. The supply voltage VDD is converted from the power supply voltage VIN and provides the operating voltage for the chip module 101, the signal stabilization module 102, and the indicator module 103 to ensure that the chip module 101, the signal stabilization module 102, and the indicator module 103 can work normally.
[0095] The control signal is a voltage level signal. The indicator module 103 indicates the status based on the difference between the high / low level signal output by the chip module 101 and the supply voltage VDD. For example, when the control signal is high, it indicates an abnormal state of the electronic product, and when the control signal is low, it indicates a normal state of the electronic product. Conversely, a high level control signal can indicate a normal state of the electronic product, and a low level control signal can indicate an abnormal state of the electronic product. This embodiment uses a high level control indicating an abnormal state and a low level control indicating a normal state as an example for explanation.
[0096] For example, when the entire electronic product status indication circuit is powered on, the controller or processor of the electronic product controls the chip module 101, the signal stabilization module 102 and the indication module 103 to start, and controls the power port of the chip module 101 and the second terminal of the indication module 103 to connect to the power supply voltage VDD, so that the chip module 101 generates a control signal and provides it to the first terminal of the indication module 103 through the signal transmission port.
[0097] Step 502: When the control signal is at the first level, the control indicator module 103 is turned on according to the first difference between the first level and the power supply voltage VDD to indicate the normal state of the electronic product.
[0098] The first level is a low-level signal, and the first difference is the difference between the low-level signal and the power supply voltage VDD, so that the indicator module 103 is turned on.
[0099] In some optional embodiments, the indicator module 103 is implemented using a diode (LED). When the control signal is low, the difference between the control signal and the supply voltage VDD reaches the conduction voltage of the diode (LED), and the diode (LED) is turned on. At this time, the diode (LED) lights up to indicate that the electronic product is operating normally.
[0100] For example, when the electronic product is in normal condition, the controller or processor control chip module 101 of the electronic product generates a first level at the signal transmission port, and turns on the diode LED through the first difference between the first level and the supply voltage VDD to indicate the normal condition of the electronic product.
[0101] Step 503: When the control signal is at the second level, the control indication module 103 cuts off based on the second difference between the second level and the power supply voltage VDD to indicate the abnormal state of the electronic product.
[0102] The second level is a high-level signal, and the second difference is the difference between the high-level signal and the power supply voltage VDD, so that the indicator module 103 is turned off.
[0103] In some optional embodiments, when the control signal is high, the difference between the control signal and the supply voltage VDD does not reach the turn-on voltage of the diode LED, so the diode LED is turned off and goes out to indicate that the electronic product is malfunctioning.
[0104] For example, when an electronic product is in an abnormal state, the controller or processor control chip module 101 of the electronic product generates a second level at the signal transmission port, and cuts off the diode LED by the second difference between the second level and the supply voltage VDD, so as to indicate the abnormal state of the electronic product.
[0105] In one embodiment, an electronic product is provided, including the electronic product status indication circuit as described in the above embodiment. The electronic product may be a switching power supply device, charging device, or similar device for electronic devices such as AC adapters, television receivers, or video game devices.
[0106] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.
[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. An electronic product status indicating circuit, characterized by include: A chip module, wherein the chip module is used to provide control signals; A signal stabilization module is provided, wherein a first terminal of the signal stabilization module is connected to the power supply voltage, a second terminal is grounded, and a third terminal is connected to the signal transmission port of the chip module. The signal stabilization module is used to adjust the current of the signal transmission port so that when the power supply voltage of the chip module changes within a first preset range, the control signal is stabilized within a second preset range. The indicator module has a first end connected to both the signal transmission port and the third end of the signal stabilization module, and a second end connected to the power supply voltage. The indicator module is used to indicate the operating status of the electronic product based on the control signal and the power supply voltage.
2. The electronic product status indicating circuit of claim 1, wherein, The chip module includes: The IC chip has its power supply pins connected to the power supply voltage, and its I / O ports are connected to the first end of the indicator module as signal transmission ports of the chip module. The IC chip is used to provide the control signal to the indicator module through the I / O ports.
3. The electronic product status indicating circuit of claim 1, wherein, The signal stabilization module includes a first resistor and a second resistor; One end of the first resistor is connected to the power supply voltage as the first terminal of the signal stabilization module. The other end of the first resistor is connected to one end of the second resistor. The other end of the second resistor is grounded as the second terminal of the signal stabilization module. The common terminal of the first resistor and the second resistor is connected to the signal transmission port and the first terminal of the indicator module as the third terminal of the signal stabilization module.
4. The electronic product status indicating circuit of claim 2, wherein, The indication module includes: A diode, wherein the cathode of the diode is connected to the IO port as the first terminal of the indicator module to receive the control signal, and the anode of the diode is connected to the power supply voltage as the second terminal of the indicator module. The diode is used to conduct or cut off according to the difference between the control signal and the power supply voltage to indicate the operating status of the electronic product.
5. The electronic product status indicating circuit of claim 1, wherein, Also includes: A current limiting module is connected between the indicator module and the power supply voltage, and the current limiting module is used to limit the branch current of the indicator module and the power supply voltage.
6. The electronic product status indicating circuit of claim 5, wherein, The current limiting module includes: A third resistor, one end of which is connected to the second terminal of the indicator module, and the other end of which is connected to the power supply voltage.
7. The electronic product status indicating circuit of claim 1, wherein, Also includes: A transformer module is provided, wherein the input terminal of the transformer module is connected to the power supply voltage, and the output terminal of the transformer module is connected to both the power supply port of the chip module and the second terminal of the indicator module. The transformer module is used to transform the power supply voltage into the supply voltage and provide it to the chip module and the indicator module.
8. The electronic product status indicating circuit according to any one of claims 1 to 7, characterized in that The first preset range includes 3.3~5.1V, and the second preset range includes 1.7~1.9V.
9. A control method for an electronic product status indicator circuit, applied to the electronic product status indicator circuit as described in any one of claims 1 to 8, wherein the electronic product status indicator circuit is used to indicate the operating status of the electronic product, the operating status including a normal state and an abnormal state, characterized in that, The method includes: The power supply voltage is connected to the power port of the chip module and the second terminal of the indicator module, so that the signal transmission port of the chip module outputs a control signal; When the control signal is at the first level, the indicator module is controlled to conduct according to the first difference between the first level and the power supply voltage to indicate the normal state of the electronic product; When the control signal is at the second level, the indicator module is controlled to cut off based on the second difference between the second level and the power supply voltage to indicate the abnormal state of the electronic product.
10. An electronic product, characterized in that, Includes the electronic product status indication circuit as described in any one of claims 1 to 8.