Self-locking isolation DCDC activation circuit based on optocoupler feedback

Abstract

The utility model discloses a self-locking isolation DCDC activation circuit based on optocoupler feedback. The self-locking isolation DCDC activation circuit comprises a trigger; an MOS (Metal Oxide Semiconductor) chip, wherein the trigger is electrically connected with the MOS chip; an isolation DCDC circuit, wherein the isolation DCDC circuit is electrically connected with the MOS chip; the isolation DCDC circuit is used for supplying power to the MCU module; an optical coupling isolation module, wherein the optical coupling isolation module is electrically connected with the MCU module; wherein when the trigger is pressed down, the MOS chip is conducted, so that the isolation DCDC circuit is electrified and supplies power to the MCU module, and the MCU module drives the optocoupler isolation module to realize electrical isolation. The problems of high power consumption, short service life of the optocoupler and low response speed can be solved.

Description

Technical Field

[0001] This invention relates to the field of power control circuits, and more particularly to a self-locking isolated DC-DC activation circuit based on optocoupler feedback. Background Technology

[0002] Existing power control circuits for low-power devices have the following drawbacks:

[0003] 1. Frequent wake-up consumes a lot of energy: Traditional solutions require the complete execution of the "activation → initialization → operation" process every time a button is pressed, with a single power consumption of up to 85-120mJ and an annual energy consumption of over 300kJ;

[0004] 2. Optocoupler aging risk: Traditional solutions rely on the continuous conduction of the optocoupler, which leads to a decrease in system reliability;

[0005] 3. Sleep / wake-up delay: Traditional RC delay circuits have slow response speed;

[0006] Based on the above reasons, a self-locking isolated DC-DC activation circuit based on optocoupler feedback was designed. Summary of the Invention

[0007] To overcome at least one of the defects described in the prior art, this invention provides a self-locking isolated DC-DC activation circuit based on optocoupler feedback. This solves the problems of high power consumption, short optocoupler lifespan, and slow response speed.

[0008] The technical solution adopted by this invention to solve its problem is:

[0009] A self-locking isolated DC-DC activation circuit based on optocoupler feedback includes: a trigger; a MOS chip electrically connected to the trigger; an isolated DC-DC circuit electrically connected to the MOS chip; an MCU module, the isolated DC-DC circuit being used to power the MCU module; and an optocoupler isolation module electrically connected to the MCU module. When the trigger is pressed, the MOS chip is turned on, energizing the isolated DC-DC circuit and powering the MCU module. The MCU module drives the optocoupler isolation module to achieve electrical isolation.

[0010] Furthermore, the MOS chip is a P-MOS chip.

[0011] Furthermore, the trigger is an external button, and one end of the external button is electrically connected to the gate of the P-MOS chip.

[0012] Furthermore, the source of the P-MOS chip is electrically connected to the input voltage, and the drain of the P-MOS chip is electrically connected to the input terminal of the isolated DC-DC circuit.

[0013] Furthermore, the output terminal of the isolated DC-DC circuit is electrically connected to the MCU module to supply power to the MCU module.

[0014] In summary, the self-locking isolated DC-DC activation circuit based on optocoupler feedback provided by this invention has the following technical effects:

[0015] 1. Low power consumption: This application uses a self-locking isolated DC-DC activation circuit based on optocoupler feedback, abandoning the traditional method of executing a complete "activation → initialization → operation" process with each button trigger. Through a unique self-locking mechanism, unnecessary energy consumption is reduced. After triggering, power is maintained on demand, avoiding high energy consumption caused by frequent wake-ups. This effectively reduces single-use power consumption, significantly reduces annual energy consumption, and improves device battery life and energy utilization.

[0016] 2. Improve optocoupler lifespan and system reliability: Employ an optocoupler feedback mechanism with non-continuous optocoupler operation. After the system stabilizes, the optocoupler's operating state is rationally controlled to avoid aging issues caused by prolonged continuous conduction, extending the optocoupler's lifespan and thus improving the overall system reliability and stability, reducing the probability of failures due to optocoupler aging.

[0017] 3. Fast response, reduced sleep / wake latency: Unlike traditional RC delay circuits, this circuit utilizes advanced control logic and circuit architecture to achieve fast response. During sleep / wake-up, it can quickly complete state switching, greatly shortening response time, meeting the device's need for fast response, and improving user experience and device efficiency. Attached Figure Description

[0018] Figure 1 This is a circuit diagram of an embodiment of the present invention;

[0019] The meanings of the reference numerals in the attached diagram are as follows: 1. External switch; 2. P-MOS chip; 3. Isolation DC-DC circuit; 4. MCU module; 5. Optocoupler isolation module. Detailed Implementation

[0020] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0021] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments, and these embodiments do not constitute a limitation on the embodiments of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] 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 invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] See Figure 1 This invention discloses a self-locking isolated DC-DC activation circuit based on optocoupler feedback, including a trigger, a MOS chip, an isolated DC-DC circuit 3, an MCU module 4, and an optocoupler isolation module 5. The trigger is electrically connected to the MOS chip, the isolated DC-DC circuit 3 is electrically connected to the MOS chip, the isolated DC-DC circuit 3 is used to supply power to the MCU module 4, and the optocoupler isolation module 5 is electrically connected to the MCU module 4. When the trigger is pressed, the MOS chip is turned on, which energizes the isolated DC-DC circuit 3 and supplies power to the MCU module 4. The MCU module 4 drives the optocoupler isolation module 5 to achieve electrical isolation.

[0025] In this embodiment, the MOS chip is a P-MOS chip 2; the trigger is an external button, one end of which is electrically connected to the gate of the P-MOS chip 2. The source of the P-MOS chip 2 is electrically connected to the input voltage, and the drain of the P-MOS chip 2 is electrically connected to the input terminal of the isolated DC-DC circuit 3; the output terminal of the isolated DC-DC circuit 3 is electrically connected to the MCU module 4 to supply power to the MCU module 4.

[0026] It should also be noted that the other end of the external button is electrically connected to the optocoupler isolation module 5.

[0027] The working principle of this invention is as follows: It adopts a three-level trigger control architecture of mechanical triggering, opto-isolation, and power drive.

[0028] 1. Input stage: Pressing the external button turns on the P-MOS chip 2, connecting the isolated DC-DC circuit 3 and supplying power to the MCU module 4;

[0029] 2. Isolation level: The MCU module 4 drives the optocoupler isolation module 5 to achieve electrical isolation;

[0030] 3. Driver stage: The optocoupler isolation module 5 keeps the P-MOS chip 2 of the isolated DC-DC circuit 3 on. When sleep mode is required, the MCU module 4 turns off the optocoupler isolation module 5, the isolated DC-DC circuit 3 stops working, and the system goes into sleep mode until the external button is activated again.

[0031] Self-locking maintenance mechanism: Zero-power self-locking is achieved through a positive feedback loop. When an external button is pressed, the optocoupler isolation module 5 is turned on, charging the P-MOS chip 2, starting the isolated DC-DC circuit 3, turning on the MCU module 4, and pulling the control terminal of the optocoupler isolation module 5 high, keeping the P-MOS chip 2 on.

[0032] In summary, the self-locking isolated DC-DC activation circuit based on optocoupler feedback provided by this invention has the following technical effects:

[0033] 1. Low power consumption: This application uses a self-locking isolated DC-DC activation circuit based on optocoupler feedback, abandoning the traditional method of executing a complete "activation → initialization → operation" process with each button trigger. Through a unique self-locking mechanism, unnecessary energy consumption is reduced. After triggering, power is maintained on demand, avoiding high energy consumption caused by frequent wake-ups. This effectively reduces single-use power consumption, significantly reduces annual energy consumption, and improves device battery life and energy utilization.

[0034] 2. Improve optocoupler lifespan and system reliability: Employ an optocoupler feedback mechanism with non-continuous optocoupler operation. After the system stabilizes, the optocoupler's operating state is rationally controlled to avoid aging issues caused by prolonged continuous conduction, extending the optocoupler's lifespan and thus improving the overall system reliability and stability, reducing the probability of failures due to optocoupler aging.

[0035] 3. Fast response, reduced sleep / wake latency: Unlike traditional RC delay circuits, this circuit utilizes advanced control logic and circuit architecture to achieve fast response. During sleep / wake-up, it can quickly complete state switching, greatly shortening response time, meeting the device's need for fast response, and improving user experience and device efficiency.

[0036] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. An opto-coupler feedback-based self-locking isolated DC-DC activation circuit, characterized in that, include: trigger; The flip-flop is electrically connected to the MOS chip. An isolated DC-DC circuit is electrically connected to the MOS chip. The isolated DC-DC circuit is used to power the MCU module. An optocoupler isolation module, which is electrically connected to the MCU module; When the trigger is pressed, the MOS chip is turned on, which powers the isolated DC-DC circuit and supplies power to the MCU module. The MCU module then drives the optocoupler isolation module to achieve electrical isolation.

2. The self-locking isolated DC-DC activation circuit based on optical coupling feedback according to claim 1, characterized in that, The MOS chip is a P-MOS chip.

3. The self-locking isolated DC-DC activation circuit based on optical coupling feedback according to claim 2, characterized in that, The trigger is an external button, and one end of the external button is electrically connected to the gate of the P-MOS chip.

4. The self-locking isolated DC-DC activation circuit based on optical coupling feedback according to claim 3, characterized in that, The source of the P-MOS chip is electrically connected to the input voltage, and the drain of the P-MOS chip is electrically connected to the input terminal of the isolated DC-DC circuit.

5. The self-locking isolated DC-DC activation circuit based on optical coupling feedback according to claim 4, characterized in that, The output of the isolated DC-DC circuit is electrically connected to the MCU module to supply power to the MCU module.

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