Anti-interference boost power supply trigger circuit

Abstract

The utility model relates to the field of electronic information technology discloses an anti -interference boost power supply trigger circuit with better stability, higher anti -interference ability and higher integration, including the DC -DC boost conversion module (110) for boosting input voltage to set value and providing stable output, signal isolation trigger module (120) and amplification drive module (130), wherein, the other input of amplification drive module (130) is connected with the output of DC -DC boost conversion module (110), for receiving a voltage signal after boosting, trigger signal is used for controlling amplification drive module (130) conduction, and the trigger signal after isolation is amplified and driven to drive the rear stage load.

Description

Technical Field

[0001] This utility model relates to the field of electronic information technology, and more specifically, to an anti-interference boost power supply trigger circuit. Background Technology

[0002] In electronic instruments and equipment, a specific voltage power supply is typically required to power the system, and a reliable trigger signal is relied upon to start or control the device's functions. In traditional solutions, the power conversion circuit and the signal trigger circuit are often designed independently, which presents the following problems: Poor power supply adaptability: Different devices have different power supply voltage requirements. Configuring a separate power conversion circuit will increase the system complexity, size and cost, and multi-power supply systems are prone to electromagnetic interference. The signal is susceptible to interference: the trigger signal is susceptible to external electromagnetic interference during transmission, which can lead to false triggering and affect the stable operation of the equipment; simple signal drive circuits are difficult to meet the needs of complex loads; Low integration: The dispersed design of power conversion, signal isolation and drive circuits increases the difficulty of wiring and the cost of troubleshooting, which is not conducive to the miniaturization and modular integration of the system; Therefore, there is an urgent need for an integrated circuit solution that can simultaneously achieve power boost conversion, signal isolation triggering, and drive amplification functions, thereby improving the system's stability, anti-interference capability, and integration. Summary of the Invention

[0003] The technical problem to be solved by this utility model is that the power conversion circuit and signal triggering circuit in the prior art are often designed independently, which has the defects of poor power adaptability, easy signal interference and low integration. This utility model provides an anti-interference boost power triggering circuit with better stability, anti-interference ability and high integration.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct an anti-interference boost power supply trigger circuit, which has the following features: The DC-DC boost converter module is configured within the trigger circuit to boost the input voltage to a set value and provide a stable output; The signal isolation trigger module is used to receive an external trigger signal and perform opto-isolated transmission. An amplification drive module has one input terminal connected to the output terminal of the signal isolation trigger module, used for the isolated trigger signal. The other input terminal of the amplification drive module is connected to the output terminal of the DC-DC boost converter module, and is used to receive a boosted voltage signal. The trigger signal is used to control the amplification drive module to turn on, and to amplify and drive the isolated trigger signal to drive the subsequent load.

[0005] In some embodiments, the DC-DC boost converter module includes at least a boost chip U101, a second inductor, and a first diode D101. The power input terminal of the boost chip U101 is connected to a +5V input through a first inductor. One end of the second inductor is connected to the power input terminal of the boost chip. The other end of the second inductor is connected to the switch pin of the boost chip and the anode of the first diode, respectively. The cathode of the first diode is connected to the other input terminal of the amplification drive module.

[0006] In some embodiments, the DC-DC boost converter module further includes a voltage divider circuit and a filter circuit. One end of the voltage divider circuit and the filter circuit is connected to the cathode of the first diode. The second terminal of the voltage divider circuit is connected to the feedback terminal of the boost chip. The third terminal of the voltage divider circuit and the other terminal of the filter circuit are connected to the common terminal.

[0007] In some embodiments, the voltage divider circuit includes a first resistor and a second resistor connected in series. One end of the first resistor is connected to the cathode of the first diode. The connection point between the first resistor and the second resistor is connected to the feedback terminal of the boost chip. One end of the second resistor is connected to the common terminal.

[0008] In some embodiments, the signal isolation triggering module includes an optocoupler and a seventh resistor; The input terminal of the optocoupler is connected to a signal input terminal. The output of the optocoupler is connected to a +3.3V-ST power supply through the seventh resistor, and an isolated trigger signal is output through a connector.

[0009] In some embodiments, the amplification driving module includes at least a first transistor and a second transistor. The base of the first transistor is connected to one output terminal of the connector. The collectors of the first transistor and the second transistor are respectively connected to one end of the filter circuit. The emitter of the first transistor is connected to the base of the second transistor. The emitter of the second transistor is connected to one input terminal of the connector.

[0010] In some embodiments, the amplification drive module further includes a third resistor, a fourth resistor, a fifth resistor, and a third diode. One end of the third resistor and one end of the fourth resistor are respectively connected to the base of the first transistor and the collector of the second transistor. The other end of the third resistor is connected to the cathode of the first diode. One end of the fifth resistor is connected to the emitter of the first transistor and the base of the second transistor. The other end of the fifth resistor is connected to the anode of the third diode. The cathode of the third diode is connected to one input terminal of the connector. The other end of the fourth resistor is connected to one output terminal of the connector.

[0011] In some implementations, it has a +5V input interface, a +13V output interface, a TRI-IN trigger signal input interface, and a TRIGGER-LINK drive output interface.

[0012] The anti-interference boost power supply trigger circuit of this utility model includes a DC-DC boost converter module for boosting the input voltage to a set value and providing a stable output, a signal isolation trigger module, and an amplification drive module. The other input terminal of the amplification drive module is connected to the output terminal of the DC-DC boost converter module to receive a boosted voltage signal. The trigger signal controls the amplification drive module to turn on and amplifies the isolated trigger signal to drive the subsequent load. Compared with existing technologies, it has better anti-interference performance. The ferrite bead at the power input, the opto-isolation of the signal channel, and the filter network at the output terminal together constitute multiple anti-interference barriers. It has high driving capability; the amplification drive module converts the control signal (small current) into a power signal (large current) to directly drive the terminal equipment. It has high integration and stability, integrating boost, isolation, and drive functions into one unit, reducing external wiring, lowering system complexity and failure rate. The output voltage remains stable through closed-loop feedback. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a circuit diagram of an embodiment of the anti-interference boost power supply trigger circuit provided by this utility model. Detailed Implementation

[0014] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0015] like Figure 1 As shown, in the first embodiment of the anti-interference boost power supply trigger circuit of this utility model, the anti-interference boost power supply trigger circuit 10 includes a DC-DC boost converter module 110, a signal isolation trigger module 120, and an amplification drive module 130. Among them, the DC-DC boost converter module 110 has the functions of boosting voltage and filtering; The signal isolation trigger module 120 serves the functions of signal isolation and transmission; The amplifier driver module 130 has the function of signal amplification; Specifically, the DC-DC boost converter module 110 is configured within the trigger circuit to boost the input voltage (corresponding to +5V) to a set value and provide a stable output (such as +13V or +12V). Furthermore, the signal isolation trigger module 120 is used to receive an external trigger signal (corresponding to TRI-IN) and perform opto-isolated transmission, and then output it to an input terminal of the amplification drive module 130; One input terminal of the amplification drive module 130 is connected to the output terminal of the signal isolation trigger module 120, and is used for the isolated trigger signal (corresponding to TRI-IN). Another input terminal of the amplifier driver module 130 is connected to the output terminal of the DC-DC boost converter module 110 to receive a boosted voltage signal (corresponding to +13V). The input trigger signal (corresponding to TRI-IN) is used to control the amplification drive module 130 to turn on and amplify the isolated trigger signal to drive the subsequent load.

[0016] Using this technical solution, there is good anti-interference capability. The ferrite bead at the power input, the opto-isolation of the signal channel, and the filter network at the output end together form multiple anti-interference barriers. It has high driving capability. The amplification and driving module converts the control signal (small current) into a power signal (large current) to directly drive the terminal equipment. It has high integration and stability. It integrates the three major functions of boost, isolation and driving into one, reducing external wiring, reducing system complexity and failure rate. The output voltage is kept stable through closed-loop feedback.

[0017] In some implementations, to ensure the boost effect on the input voltage, a boost chip U101, a second inductor L102, and a first diode D101 can be provided in the DC-DC boost converter module 110. Specifically, the power input terminal (corresponding to pin 5) of the boost chip U101 is connected to the +5V input through the first inductor L101 (which can be a ferrite bead). One end of the second inductor L102 is connected to the power input terminal (pin 5) of the boost chip U101. The other end of the second inductor L102 is connected to the switch pin (corresponding to pin 1) of the boost chip U101 and the anode of the first diode D101, respectively, and boosts the input +5V voltage to output +13V voltage. The cathode of the first diode D101 is connected to another input terminal of the amplifier drive module 130.

[0018] In some embodiments, the DC-DC boost converter module 110 further includes a voltage divider circuit 112 and a filter circuit 113. One end of the voltage divider circuit 112 and the filter circuit 113 is connected to the cathode of the first diode D101. The second terminal of the voltage divider circuit 112 is connected to the feedback terminal (corresponding to pin 3) of the boost chip U101. The third terminal of voltage divider circuit 112 and the other terminal of filter circuit 113 are connected to the common terminal.

[0019] In some embodiments, the voltage divider circuit 112 includes a first resistor R101 and a second resistor R102 connected in series. One end of the first resistor R101 is connected to the cathode of the first diode D101. The connection terminals of the first resistor R101 and the second resistor R102 are connected to the feedback terminal (corresponding to pin 1) of the boost chip U101. One end of the second resistor R102 is connected to the common terminal.

[0020] Specifically, The +5V input is filtered by the first inductor L101 and then input to the VIN pin (pin 5) of the boost chip U101. The internal switch of the boost chip U101 is periodically turned on and off. The energy is stored in the second inductor L102 and the freewheeling current is used by the first diode D101 to boost the low voltage. The output voltage is sampled through the FB pin (pin 3) by the voltage divider (voltage divider between the first resistor R101 and the second resistor R102) and the feedback is used to adjust the output to stabilize the +13V voltage. The input filter circuit 111 and the filter circuit 113 form a multi-stage filter network to filter out ripple and ensure a clean power supply. The boost chip U101 uses an adapter chip with boost function, which is adapted to +5V input and can be adjusted to +13V output. The second inductor L102 is a 22uH inductor, which is compatible with the switching frequency of the boost chip U101 to ensure energy storage efficiency. The first diode, D101, is an SS24 Schottky diode, which has a small forward voltage drop and fast freewheeling speed. The first resistor R101 and the second resistor R102 are calculated and selected according to the output voltage formula V-{OUT}=V-{REF}×(1+\frac{R101}{R102}) (the internal reference voltage V-{REF} of the chip is determined according to the model). The appropriate resistance value is selected to make the output stable at +13V.

[0021] In some embodiments, the signal isolation trigger module 120 includes an optocoupler U102 and a seventh resistor R107, wherein the optocoupler U102 has the function of signal isolation and the seventh resistor R107 serves as a current limiting resistor. Specifically, the input terminal (corresponding to pin 3) of optocoupler U102 is connected to a signal input terminal (TRI-IN) for receiving trigger signals. The signal input terminal (TRI-IN) can be an output pin of an external microcontroller; Furthermore, the output of optocoupler U102 is connected to a +3.3V-ST power supply through the seventh resistor R107, and outputs an isolated trigger signal through connector CN18.

[0022] Specifically, The optocoupler U102 is selected as PC-JX7C optocoupler, which meets the isolation voltage requirements and has a transmission speed that matches the trigger signal frequency; The seventh resistor R107 is a 10KΩ current-limiting resistor to ensure that the operating current of the optocoupler LED is within the rated range (generally 5mA-20mA). It works in conjunction with the seventh resistor R107 (10KΩ), the +3.3V-ST power supply, and the CN18 connector to achieve signal isolation.

[0023] After the trigger signal (TRI-IN) is input, it is current-limited by the seventh resistor R107 and drives the internal light-emitting diode of the optocoupler U102. The light-emitting diode emits light, which turns on the phototransistor, realizing the opto-isolated transmission of the trigger signal from the input side to the output side, effectively blocking external interference. The output side is connected to the subsequent circuit to transmit the isolated trigger signal.

[0024] In some embodiments, the amplification drive module 130 includes at least a first transistor Q101 and a second transistor Q102, which together form a composite transistor 131. Both the first transistor Q101 and the second transistor Q102 are NPN transistors and have switching and amplification functions. Specifically, the base of the first transistor Q101 is connected to one output terminal (corresponding to pins 1, 3, and 4) of connector CN18. The collectors of the first transistor Q101 and the second transistor Q102 are respectively connected to one end of the filter circuit 113. The emitter of the first transistor Q101 is connected to the base of the second transistor Q102. The emitter of the second transistor Q102 is connected to one input terminal (pin 7) of connector CN18.

[0025] In some embodiments, the amplification drive module 130 further includes a third resistor R103, a fourth resistor R104, a fifth resistor R105, and a third diode D103. One end of the third resistor R103 and one end of the fourth resistor R104 are connected to the base of the first transistor Q101 and the collector of the second transistor Q102, respectively. The other end of the third resistor R103 is connected to the cathode of the first diode D101. One end of the fifth resistor R105 is connected to the emitter of the first transistor Q101 and the base of the second transistor Q102. The other end of the fifth resistor R105 is connected to the anode of the third diode D103. The cathode of the third diode D103 is connected to one input terminal (pin 7) of connector CN18. The other end of the fourth resistor R104 is connected to one output terminal of connector CN18 (corresponding to pins 1, 3, and 4).

[0026] In some implementations, the circuit has a +5V input interface, a +13V output interface, a TRI-IN trigger signal input interface, and a TRIGGER-INK drive output interface.

[0027] Specifically, the third diode D103 is selected as the S2J diode, which adapts the circuit requirements to the voltage regulation / freewheeling function. The parameters of the third resistor R103, the fourth resistor R104, the fifth resistor R105, the seventh capacitor C107, and the eighth capacitor C108 are selected according to the transistor bias and filtering requirements to ensure circuit stability. The +13V power supply is regulated by the second diode D102 and filtered by the seventh capacitor C107, and then supplies power to the first transistor Q101 and the second transistor Q102. The trigger signal (TRI-IN) is isolated by optocoupler U102 and then input to the base of the first transistor Q101. The first transistor Q101 and the second transistor Q102 form a composite transistor, which utilizes the current amplification characteristics of the transistor to enhance the driving capability of the trigger signal. The third diode, D103, serves as a freewheeling and clamping mechanism to protect the transistor. The third resistor R103, the fourth resistor R104, and the fifth resistor R105 provide bias and current limiting for the transistor to ensure stable operation. The seventh capacitor C107 and the eighth capacitor C108 further filter and optimize signal quality.

[0028] This solution has the following technical advantages: 1. Power supply debugging: Connect +5V input and measure the output voltage of boost chip U101. If the deviation from +13V is large, adjust the voltage division ratio of the first resistor R101 and the second resistor R102. Observe the ripple of the filter capacitor and optimize the capacitor value or layout to ensure that the power supply ripple meets the requirements of the subsequent circuit (generally in the mV range). 2. Signal isolation test: Input a TRI-IN pulse signal (such as a 1KHz, 3.3V square wave), and use an oscilloscope to measure the input and output signals of the optocoupler U102 to verify the signal transmission delay and waveform integrity, ensuring that the signal is not distorted after isolation and meets the triggering requirements of the subsequent stage; 3. Overall integration and testing: Connect the downstream load, simulate triggering scenarios, test the circuit's working status under different load and interference environments, verify the stable power output, reliable signal triggering, and anti-interference capabilities. If any abnormalities occur, adjust parameters such as the filter network and transistor bias resistors for optimization.

[0029] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An anti-interference boost power supply trigger circuit, characterized in that, have: The DC-DC boost converter module is configured within the trigger circuit to boost the input voltage to a set value and provide a stable output; The signal isolation trigger module is used to receive an external trigger signal and perform opto-isolated transmission. An amplification drive module has one input terminal connected to the output terminal of the signal isolation trigger module, used for the isolated trigger signal. The other input terminal of the amplification drive module is connected to the output terminal of the DC-DC boost converter module, and is used to receive a boosted voltage signal. The trigger signal is used to control the amplification drive module to turn on, and to amplify and drive the isolated trigger signal to drive the subsequent load.

2. The anti-interference boost power supply trigger circuit according to claim 1, characterized in that, The DC-DC boost converter module includes at least a boost chip, a second inductor, and a first diode. The power input terminal of the boost chip is connected to a +5V input through a first inductor. One end of the second inductor is connected to the power input terminal of the boost chip. The other end of the second inductor is connected to the switch pin of the boost chip and the anode of the first diode, respectively. The cathode of the first diode is connected to the other input terminal of the amplification drive module.

3. The anti-interference boost power supply trigger circuit according to claim 2, characterized in that, The DC-DC boost converter module also includes a voltage divider circuit and a filter circuit. One end of the voltage divider circuit and the filter circuit is connected to the cathode of the first diode. The second terminal of the voltage divider circuit is connected to the feedback terminal of the boost chip. The third terminal of the voltage divider circuit and the other terminal of the filter circuit are connected to the common terminal.

4. The anti-interference boost power supply trigger circuit according to claim 3, characterized in that, The voltage divider circuit includes a first resistor and a second resistor connected in series. One end of the first resistor is connected to the cathode of the first diode. The connection point between the first resistor and the second resistor is connected to the feedback terminal of the boost chip. One end of the second resistor is connected to the common terminal.

5. The anti-interference boost power supply trigger circuit according to claim 4, characterized in that, The signal isolation triggering module includes an optocoupler and a seventh resistor; The input terminal of the optocoupler is connected to a signal input terminal. The output of the optocoupler is connected to a +3.3V-ST power supply through the seventh resistor, and an isolated trigger signal is output through a connector.

6. The anti-interference boost power supply trigger circuit according to claim 5, characterized in that, The amplification drive module includes at least a first transistor and a second transistor. The base of the first transistor is connected to one output terminal of the connector. The collectors of the first transistor and the second transistor are respectively connected to one end of the filter circuit. The emitter of the first transistor is connected to the base of the second transistor. The emitter of the second transistor is connected to one input terminal of the connector.

7. The anti-interference boost power supply trigger circuit according to claim 6, characterized in that, The amplification drive module also includes a third resistor, a fourth resistor, a fifth resistor, and a third diode. One end of the third resistor and one end of the fourth resistor are respectively connected to the base of the first transistor and the collector of the second transistor. The other end of the third resistor is connected to the cathode of the first diode. One end of the fifth resistor is connected to the emitter of the first transistor and the base of the second transistor. The other end of the fifth resistor is connected to the anode of the third diode. The cathode of the third diode is connected to one input terminal of the connector. The other end of the fourth resistor is connected to one output terminal of the connector.

8. The anti-interference boost power supply trigger circuit according to any one of claims 1 to 7, characterized in that, It features a +5V input interface, a +13V output interface, a TRI-IN trigger signal input interface, and a TRIGGER-LINK drive output interface.

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