Smoke bomb ignition driving and control circuit

Abstract

The utility model provides a smoke bomb ignition driving and control circuit, which belongs to the technical field of smoke bomb ignition control and comprises a control end KZ, a core chip U1, a voltage feedback unit, a current feedback unit, a filtering unit, a wiring state detection unit, a working state detection unit and a Schottky diode D5. A control end KZ is connected with a fourth pin CS of the core chip U1, and an output end of the core chip U1 is respectively connected with a Schottky diode D5, a working state detection unit and a voltage feedback unit through a filtering unit; the voltage feedback unit is connected with a second pin FB of the core chip U1; the cathode of the Schottky diode D5 is connected with the current feedback unit, the wiring state detection unit and the output end CN1. The second end of the current feedback unit is connected with the fourth pin CS of the core chip U1. Constant-current output and control of the smoke bomb ignition driving and control circuit are achieved, and the safety and reliability of the circuit are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to smoke bomb ignition control technical field, especially relate to a smoke bomb ignition drive and control circuit. BACKGROUND

[0002] The ignition drive and control technology of smoke bomb mainly relates to how to ignite in short time efficiently and reliably.

[0003] The current ignition drive usually adopts the control mode of relay or point switch, adopts the relay control ignition, and the volume is big and does not have the current limiting function of good current limiting function, the current ignition control system based on FlexRay bus design is distributed on the shell ignition control system, although the system utilizes the FlexRay bus technology to improve the reliability and anti -interference ability of ignition system, and through the distributed layout ignition component, more accurate control is realized. But the system still has the following shortcomings: using ordinary light pipe control, current limiting is difficult, and the circuit is easy to be damaged due to overcurrent;There is no wiring and working state detection circuit.

[0004] Therefore, the utility model provides a smoke bomb ignition drive and control circuit. Utility model content

[0005] The utility model provides a smoke bomb ignition drive and control circuit to at least solve the problem of not having current limiting function in the ignition drive and control circuit in the prior art.

[0006] The drive and control circuit includes: control end KZ, core chip U1, voltage feedback unit, current feedback unit, filter unit, wiring state detection unit, working state detection unit and Schottky diode D5;

[0007] The control end KZ is used for connecting the drive controller, the control end KZ is connected with the fourth pin CS of the core chip U1, and the output end of the core chip U1 is connected with the filter unit;

[0008] The output end of the filter unit is connected with the anode of Schottky diode D5, the input end of the working state detection unit and the second end of the voltage feedback unit respectively;The first end of the voltage feedback unit is connected with the second pin FB of the core chip U1.

[0009] The cathode of Schottky diode D5 is connected with the first end of the current feedback unit, the input end and the output end CN1 of the wiring state detection unit respectively;The second end of the current feedback unit is connected with the fourth pin CS of the core chip U1.

[0010] Further, the driving and control circuit further comprises: a diode D1, a resistor R1, a resistor R3; the current feedback unit comprises a resistor R6 and a resistor R7; the voltage feedback unit comprises a resistor R4 and a resistor R5;

[0011] The second pin FB of the core chip U1 is connected with the first end of the resistor R4 and the first end of the resistor R5 respectively; the first end of the resistor R4 is connected with the first end of the resistor R5, the second end of the resistor R4 is connected with the output end CN1 through the Schottky diode D5, and the second end of the resistor R4 is connected with the second end of the filter unit; the second end of the resistor R5 is grounded.

[0012] The second pin FB of the core chip U1 is connected with the first end of the voltage feedback unit, and the second end of the voltage feedback unit is connected with the filter unit and the anode of the Schottky diode D5 respectively; the third pin SW of the core chip U1 is connected with the sixth pin SW of the core chip U1, the first end of the filter unit is connected with the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 respectively, and the second end of the filter unit is connected with the output end CN1 through the Schottky diode D5.

[0013] The fourth pin CS of the core chip U1 is connected with the cathode of the diode D1; the first end of the resistor R7 is connected with the fourth pin CS of the core chip U1, and the first end of the resistor R7 is also connected with the cathode of the diode D1; the second end of the resistor R7 is connected with the first end of the resistor R6 and the output end CN1 respectively; the first end of the resistor R6 is connected with the output end CN1, and the second end of the resistor R6 is grounded; the anode of the diode D1 is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with a 5V power supply; the anode of the diode D1 is connected with the first end of the resistor R3, and the second end of the resistor R3 is connected with a control end KZ.

[0014] Further, the filter unit comprises an inductor L1, a Schottky diode D4 and a capacitor C2.

[0015] The anode of the Schottky diode D4 is grounded; the cathode of the Schottky diode D4 is connected with the third pin SW of the core chip U1, the sixth pin SW of the core chip U1 and the first end of the inductor L1 respectively, the second end of the inductor L1 is connected with the first end of the capacitor C2 and the anode of the Schottky diode D5 respectively, the cathode of the Schottky diode D5 is connected with the output end CN1, the first end of the capacitor C2 is connected with the anode of the Schottky diode D5, and the second end of the capacitor C2 is connected with the anode of the Schottky diode D4 and grounded.

[0016] Further, the driving and control circuit further comprises a wiring state detection unit, the wiring state detection unit comprising a Zener diode ZD1, a capacitor C3, a resistor R9, a resistor R8, a resistor R14, a diode D8 and a light emitting diode LED2;

[0017] The first end of the resistor R9 is connected to the output end CN1.

[0018] The first end of the resistor R9 is connected to the first end of the resistor R8 and the first end of the resistor R14 respectively; the second end of the resistor R8 is connected to the cathode of the diode D8, and the anode of the diode D8 is connected to the second power supply VCC; the second end of the resistor R14 is connected to the anode of the light emitting diode LED2, and the cathode of the light emitting diode LED2 is grounded; the second end of the resistor R9 is connected to the first end of the capacitor C3 and the cathode of the Zener diode ZD1 respectively; the second end of the capacitor C3 is grounded; the anode of the Zener diode ZD1 is connected to the second end of the capacitor C3 and grounded, and the cathode of the Zener diode ZD1 is connected to the detection output end VX1.

[0019] The first end of the resistor R9 is also connected to the cathode of the Schottky diode D5. The wiring state detection unit is used to detect whether the smoke bomb is properly connected to the output end CN1. The wiring state of the smoke bomb is detected through the wiring state detection unit. When the output end CN1 is not connected to the smoke bomb, the detection output end VX1 outputs high level, and the indicator light of the light emitting diode LED2 is on. When the output end CN1 is connected to the smoke bomb, the detection output end VX1 outputs low level, and the indicator light of the light emitting diode LED2 is off. Through the on-off of the light emitting diode LED2, it can be directly observed whether the output end CN1 is connected to the smoke bomb, that is, the wiring state of the output end CN1 and the smoke bomb can be directly observed.

[0020] Further, the driving and control circuit further comprises a working state detection unit, the working state detection unit comprising a resistor R11, a resistor R12, a light emitting diode LED1, a capacitor C4, a Zener diode ZD3;

[0021] The first end of the resistor R11 is connected to the second end of the inductor L1, the first end of the capacitor C2, the second end of the resistor R4, the anode of the Schottky diode D5 and the first end of the resistor R12 respectively; the second end of the resistor R11 is connected to the first end of the capacitor C4 and the cathode of the Zener diode ZD3 respectively; the second end of the capacitor C4 is grounded, and the anode of the Zener diode ZD3 is connected to the second end of the capacitor C4 and grounded; the second end of the resistor R12 is connected to the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is grounded;

[0022] The second end of the resistor R11 is also connected to a working state detection output end VX2.

[0023] Further, the model of the voltage stabilizing diode ZD1 and the voltage stabilizing diode ZD3 is BZT52C5V1.

[0024] Further, the model of the Schottky diode D4 and the Schottky diode D5 is SS36.

[0025] Further, the model of the core chip U1 is XL4501E1.

[0026] From the above technical solution, the utility model has the following advantages:

[0027] In the smoke bomb ignition driving and control circuit, the voltage feedback unit feeds back the output voltage value to the second pin FB of the core chip U1, and when the current output by the core chip U1 is less than the set maximum working current, the core chip U1 is in a constant voltage output state, so that the output is kept in a constant voltage state.

[0028] The current output by the core chip U1 is fed back to the fourth pin CS of the core chip U1 by the current feedback unit, and when the current reaches the set value, the core chip U1 enters a constant current state, and the output or shutdown of the core chip U1 is controlled by the high and low levels of the control end signal KZ, so as to realize the constant voltage and constant current output or shutdown of the smoke bomb ignition driving and control circuit, and improve the safety and reliability of the smoke bomb ignition driving and control circuit.

[0029] The wiring state detection unit is added, and through the on-off of the light emitting diode LED2, it can be directly observed whether the output end CN1 is connected with the smoke bomb, that is, the wiring state of the output end CN1 and the smoke bomb can be directly observed, and the wiring state of the driving circuit can be known through the detection of the level state of the output end VX1.

[0030] The working state detection unit is added, and the working state of the driving control circuit can be detected through the working state detection unit, and the output state of the driving circuit can be known through the detection of the level state of the output end VX2. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme of the present application, the drawings needed in the description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 It is an electrical principle diagram of the ignition driving and control circuit of the smoke bomb.

[0033] Figure 2 It is a circuit principle diagram of the ignition driving and control circuit of the smoke bomb.

[0034] Figure 3 It is a circuit principle diagram of the wiring state detection unit and the output terminal CN1 in the ignition driving and control circuit of the smoke bomb.

[0035] Figure 4 It is a circuit principle diagram of the working state detection unit in the ignition driving and control circuit of the smoke bomb.

[0036] Reference signs: 1-voltage feedback unit; 2-current feedback unit; 3-filter unit; 4-wiring state detection unit; 5-working state detection unit. DETAILED DESCRIPTION

[0037] In the following, the smoke bomb ignition driving and control circuit will be described in detail, and various embodiments of the present disclosure will be more fully described. The present disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents and / or alternatives falling within the spirit and scope of various embodiments of the present disclosure.

[0038] In the following, the term "include" or "may include" used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations or elements, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present disclosure, the terms "include", "have" and their synonyms are only intended to mean a specific feature, number, step, operation, element, component or combination of the foregoing, and should not be understood as first excluding the presence or addition of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing or the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing.

[0039] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination of the listed terms or all combinations thereof. For example, the expression "A or B" or "at least one of A or / and B" can include A, can include B, or can include both A and B.

[0040] The expressions used in various embodiments of the present disclosure, such as "first", "second", etc., can modify various constituent elements in various embodiments, but can not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present disclosure, a first element can be referred to as a second element, and likewise, a second element can be referred to as a first element.

[0041] It should be noted that if a description connects one constituent element to another constituent element, the first constituent element can be directly connected to the second constituent element, and a third constituent element can be "connected" between the first constituent element and the second constituent element. Conversely, when one constituent element is "directly connected" to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] The embodiment provides a smoke bomb ignition driving and control circuit, which solves the technical problem that the current ignition driving and control circuit does not have a current limiting function.

[0044] The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the drawings.

[0045] Figure 1 The electrical principle block diagram of the smoke bomb ignition driving and control circuit provided by the embodiments of the present application is combined with Figure 1 The smoke bomb ignition driving and control circuit provided by the embodiments of the present application, the driving and control circuit comprises: a control end KZ, a core chip U1, a voltage feedback unit 1, a current feedback unit 2, a filter unit 3, a wiring state detection unit 4, a working state detection unit 5 and a Schottky diode D5. In the embodiment, the model of the core chip U1 is XL4501E1.

[0046] The control end KZ is used for connecting a drive controller, and through connecting the drive controller, constant voltage and constant current output or off of the smoke bomb ignition drive and control circuit is realized, the control end KZ is connected with the fourth pin CS of the core chip U1, and the output end of the core chip U1 is connected with the filtering unit 3.

[0047] The output end of the filtering unit 3 is connected with the anode of the Schottky diode D5, the input end of the working state detection unit 5 and the second end of the voltage feedback unit 1 respectively, and the first end of the voltage feedback unit 1 is connected with the second pin FB of the core chip U1.

[0048] The cathode of the Schottky diode D5 is connected with the first end of the current feedback unit 2, the input end and the output end CN1 of the connection state detection unit 4 respectively, and the second end of the current feedback unit 2 is connected with the fourth pin CS of the core chip U1.

[0049] Figure 2 A kind of circuit principle diagram of smoke bomb ignition drive and control circuit provided in the embodiment of the application, combined Figure 2 The drive and control circuit further includes: diode D1, resistance R1, resistance R3;The current feedback unit 2 includes resistance R6 and resistance R7;The voltage feedback unit 1 includes resistance R4 and resistance R5.

[0050] The first pin GND of the core chip U1 is grounded, and the second pin FB of the core chip U1 is connected with the first end of the resistance R4 and the first end of the resistance R5 respectively;The first end of the resistance R4 is connected with the first end of the resistance R5, the second end of the resistance R4 is connected with the output end CN1 by the Schottky diode D5, and the second end of the resistance R4 is connected with the second end of the filtering unit 3;The second end of the resistance R5 is grounded.

[0051] The second pin FB of the core chip U1 is connected with the first end of the voltage feedback unit 1, and the second end of the voltage feedback unit 1 is connected with the anode of the Schottky diode D5 and the filtering unit 3 respectively;The third pin SW of the core chip U1 is connected with the sixth pin SW of the core chip U1, the first end of the filtering unit 3 is connected with the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 respectively, and the second end of the filtering unit 3 is connected with the output end CN1 by the Schottky diode D5.

[0052] The output voltage value is fed back to the second pin FB of the core chip U1 by the voltage feedback unit, when the current output by the core chip U1 is less than the set maximum working current, the core chip U1 is in constant voltage output state, so that the output keeps constant voltage state.

[0053] The fourth pin CS of the core chip U1 is connected with the cathode of the diode D1; the first end of the resistor R7 is connected with the fourth pin CS of the core chip U1, and the first end of the resistor R7 is also connected with the cathode of the diode D1; the second end of the resistor R7 is connected with the first end and the output end CN1 of the resistor R6 respectively; the first end of the resistor R6 is connected with the output end CN1, and the second end of the resistor R6 is grounded; the anode of the diode D1 is connected with the first end of the resistor R1, and the second end of the resistor R1 is connected with a 5V power supply; the anode of the diode D1 is connected with the first end of the resistor R3, and the second end of the resistor R3 is connected with a control end KZ. The fifth pin VIN of the core chip U1 is connected with a first power supply VCC.

[0054] In the embodiment, the resistor R6 and the resistor R7 constitute a current feedback unit 2, the current signal output by the core chip U1 is fed back to the fourth pin CS of the core chip U1, when the current of the smoke bomb reaches 0.11 / RS, the output enters a constant current state, so that the driving circuit will not be damaged due to overcurrent.

[0055] The current output by the core chip U1 is fed back to the fourth pin CS of the core chip U1 by the current feedback unit, when the current reaches a set value, the core chip U1 enters a constant current state; the output or shutdown of the core chip U1 is controlled by the high and low levels of the control end signal KZ; thereby realizing the constant voltage and constant current output or shutdown of the smoke bomb ignition driving and control circuit, and improving the safety and reliability of the smoke bomb ignition driving and control circuit.

[0056] Working principle: when the control end KZ is at a high level, the diode D1 is turned on, the control voltage of the fourth pin CS of the core chip U1 is higher than an upper limit value, the core chip U1 is in a shutdown state, the voltage and current output by the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 are 0, the Schottky diode D5 is not turned on, and the output end CN1 does not work. When the control end KZ is at a low level, the diode D1 is not turned on, the control voltage of the fourth pin CS of the core chip U1 is lower than the upper limit value, the core chip U1 is in a normal working state, the voltage and current output by the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 are not 0, the Schottky diode D5 is turned on, and the output end CN1 works. It should be noted that the output end CN1 is used to connect the smoke bomb. When the resistance of the smoke bomb connected with the output end CN1 is greater than V0*RS / 0.11, the output enters a constant current mode, and the constant current value I0=0.11 / RS; the constant current value I0 can be changed by adjusting RS. It should be noted that RS is a preset resistance value.

[0057] When the current output by the core chip U1 is less than the set maximum working current, the core chip U1 is in a constant voltage output state, and the voltage values output by the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 are fed back to the second pin FB of the core chip U1 by the voltage feedback unit 1, so that the voltage output of the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 is changed.

[0058] In an example embodiment, the voltage feedback unit 1 comprises resistors R4 and R5, the second pin FB of the core chip U1 is connected to the first end of the resistor R4 and the first end of the resistor R5 respectively; the first end of the resistor R4 is connected to the first end of the resistor R5, the second end of the resistor R4 is connected to the output end CN1 through a Schottky diode D5, and the second end of the resistor R4 is connected to the second end of the filter unit 3; and the second end of the resistor R5 is grounded.

[0059] Working principle: when the current output by the core chip U1 is less than the set maximum working current, the core chip U1 is in a constant voltage output state, and the voltage values output by the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 are fed back to the second pin FB of the core chip U1 by the voltage feedback unit 1, so that the voltage output of the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 is changed. Specifically, the voltage values output by the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 are divided by the resistors R4 and R5 and fed back to the second pin FB of the core chip U1, so that the core chip U1 is in a constant voltage output state. Wherein, the output voltage V01=1.25*R5 / (R4+R5), by adjusting the resistance value of R4, R5, the size of the output voltage V01 can be changed.

[0060] According to another embodiment of the present application, the filter unit 3 comprises an inductor L1, a Schottky diode D4 and a capacitor C2; the anode of the Schottky diode D4 is grounded; the cathode of the Schottky diode D4 is connected to the third pin SW of the core chip U1, the sixth pin SW of the core chip U1 and the first end of the inductor L1 respectively, the second end of the inductor L1 is connected to the first end of the capacitor C2 and the anode of the Schottky diode D5 respectively, the cathode of the Schottky diode D5 is connected to the output end CN1, the first end of the capacitor C2 is connected to the anode of the Schottky diode D5, and the second end of the capacitor C2 is connected to the anode of the Schottky diode D4 and grounded.

[0061] According to the embodiment of the present application, the driving and control circuit further comprises a wiring state detection unit 4, which is connected to the output end CN1 and the second end of the filter unit 3, and detects the wiring state of the output end CN1 and the second end of the filter unit 3. Figure 2 andFigure 3 The wiring state detection unit 4 comprises a Zener diode ZD1, a capacitor C3, a resistor R9, a resistor R8, a resistor R14, a diode D8 and a light emitting diode LED2; the first end of the resistor R9 is connected to the output end CN1.

[0062] The first end of the resistor R9 is connected to the first end of the resistor R8 and the first end of the resistor R14 respectively; the second end of the resistor R8 is connected to the cathode of the diode D8, and the anode of the diode D8 is connected to the second power supply VCC; the second end of the resistor R14 is connected to the anode of the light emitting diode LED2, and the cathode of the light emitting diode LED2 is grounded; the second end of the resistor R9 is connected to the first end of the capacitor C3 and the cathode of the Zener diode ZD1 respectively; the second end of the capacitor C3 is grounded; the anode of the Zener diode ZD1 is connected to the second end of the capacitor C3 and grounded, and the cathode of the Zener diode ZD1 is connected to the detection output end VX1; the Zener diode ZD1 is arranged to stabilize the voltage of the detection output end VX1; the first end of the resistor R9 is also connected to the cathode of the Schottky diode D5.

[0063] The wiring state detection unit 4 is used to detect whether the smoke bomb is properly connected to the output end CN1, and the wiring state of the smoke bomb is detected by the wiring state detection unit 4. Figure 2 and Figure 4 When the output end CN1 is not connected to the smoke bomb, the detection output end VX1 outputs a high level, and the indicator light of the light emitting diode LED2 is on, and the detection output end VX1 is high. When the output end CN1 is connected to the smoke bomb, the equivalent resistance of the smoke bomb is generally in the range of 1~10 Oohms, at this time the detection output end VX1 outputs a low level, and the indicator light of the light emitting diode LED2 is off, and the detection output end VX1 is low. By the on-off of the light emitting diode LED2, it can be directly observed whether the output end CN1 is connected to the smoke bomb, i.e. the wiring state of the output end CN1 and the smoke bomb can be directly observed; by detecting the level state of the detection output end VX1, the wiring working state can be known.

[0064] In one embodiment, the driving and control circuit further comprises a working state detection unit 5, in combination with Figure 3 The working state detection unit 5 comprises a resistor R11, a resistor R12, a light emitting diode LED1, a capacitor C4 and a Zener diode ZD3.

[0065] The first end of the resistor R11 is connected with the second end of the inductor L1, the first end of the capacitor C2, the second end of the resistor R4, the anode of the Schottky diode D5 and the first end of the resistor R12 respectively; the second end of the resistor R11 is connected with the first end of the capacitor C4 and the cathode of the voltage stabilizing diode ZD3 respectively; the second end of the capacitor C4 is grounded, the anode of the voltage stabilizing diode ZD3 is connected with the second end of the capacitor C4 and grounded; the second end of the resistor R12 is connected with the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is grounded; the second end of the resistor R11 is also connected with the working state detection output end VX2.

[0066] The working state detection unit 5 is used for detecting whether the working circuit is in a non-fault state, and the working state of the working circuit is detected through the working state detection unit 5. Figure 4 When the core chip U1 is in an output working state and the voltage value of the output voltage V01 is greater than 5V, the working state detection output end VX2 outputs a high level, and the indicator light of the light emitting diode LED1 is bright. When the core chip U1 is in an off state, the output voltage V01 has no voltage output, the working state detection output end VX2 outputs a low level, and the light emitting diode LED1 is off, and the output state of the driving circuit can be known through the level state of the detection output end VX2.

[0067] As an example, the model of the voltage stabilizing diode ZD1 and the voltage stabilizing diode ZD3 is BZT52C5V1.

[0068] It needs to be further explained that the model of the Schottky diode D4 and the Schottky diode D5 is SS36. The Schottky diode D5 is used for isolating the working state detection unit 5 and the wiring state detection unit 4.

[0069] Many modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0070] For those skilled in the art, according to the teaching of the present application, it does not need creative labor to design different forms of control circuits. The changes, modifications, replacements and variations of the embodiments without departing from the principles and spirits of the present application still fall into the protection scope of the present application.

Claims

1. An ignition drive and control circuit for an aerosol bomb, characterized by, The drive and control circuit comprises a control end KZ, a core chip U1, a voltage feedback unit (1), a current feedback unit (2), a filter unit (3), a wiring state detection unit (4), a working state detection unit (5) and a Schottky diode D5. The control end KZ is used for connecting a drive controller, the control end KZ is connected to the fourth pin CS of the core chip U1, and the output end of the core chip U1 is connected to the filter unit (3). The output end of the filter unit (3) is connected to the anode of the Schottky diode D5, the input end of the working state detection unit (5) and the second end of the voltage feedback unit (1) respectively; the first end of the voltage feedback unit (1) is connected to the second pin FB of the core chip U1. The cathode of the Schottky diode D5 is connected to the first end of the current feedback unit (2), the input end and the output end CN1 of the wiring state detection unit (4) respectively; the second end of the current feedback unit (2) is connected to the fourth pin CS of the core chip U1.

2. The flare ignition drive and control circuit of claim 1 wherein, The drive and control circuit further comprises a diode D1, a resistor R1 and a resistor R3; the current feedback unit (2) comprises a resistor R6 and a resistor R7; the voltage feedback unit (1) comprises a resistor R4 and a resistor R5; The second pin FB of the core chip U1 is connected to the first end of the resistor R4 and the first end of the resistor R5 respectively; the first end of the resistor R4 is connected to the first end of the resistor R5, the second end of the resistor R4 is connected to the output end CN1 through the Schottky diode D5, and the second end of the resistor R4 is connected to the second end of the filter unit (3); the second end of the resistor R5 is grounded; The second pin FB of the core chip U1 is connected to the first end of the voltage feedback unit (1), and the second end of the voltage feedback unit (1) is connected to the filter unit (3) and the anode of the Schottky diode D5 respectively; the third pin SW of the core chip U1 is connected to the sixth pin SW of the core chip U1, the first end of the filter unit (3) is connected to the third pin SW of the core chip U1 and the sixth pin SW of the core chip U1 respectively, and the second end of the filter unit (3) is connected to the output end CN1 through the Schottky diode D5; The fourth pin CS of the core chip U1 is connected to the cathode of the diode D1; the first end of the resistor R7 is connected to the fourth pin CS of the core chip U1, and the first end of the resistor R7 is also connected to the cathode of the diode D1; the second end of the resistor R7 is connected to the first end of the resistor R6 and the output end CN1 respectively; the first end of the resistor R6 is connected to the output end CN1, and the second end of the resistor R6 is grounded; the anode of the diode D1 is connected to the first end of the resistor R1, and the second end of the resistor R1 is connected to a 5V power supply; the anode of the diode D1 is connected to the first end of the resistor R3, and the second end of the resistor R3 is connected to the control end KZ.

3. The flare ignition drive and control circuit of claim 2 wherein, The filter unit (3) comprises an inductor L1, a Schottky diode D4 and a capacitor C2. An anode of the Schottky diode D4 is grounded; a cathode of the Schottky diode D4 is connected with a third pin SW of the core chip U1, a sixth pin SW of the core chip U1 and a first end of the inductor L1 respectively; a second end of the inductor L1 is connected with a first end of the capacitor C2 and an anode of the Schottky diode D5 respectively; a cathode of the Schottky diode D5 is connected with an output terminal CN1; the first end of the capacitor C2 is connected with the anode of the Schottky diode D5; a second end of the capacitor C2 is connected with the anode of the Schottky diode D4 and grounded.

4. The flare ignition drive and control circuit of claim 3 wherein, The wiring state detection unit (4) comprises a zener diode ZD1, a capacitor C3, a resistor R9, a resistor R8, a resistor R14, a diode D8 and a light emitting diode LED2; A first end of the resistor R9 is connected with the output terminal CN1; The first end of the resistor R9 is connected with a first end of the resistor R8 and a first end of the resistor R14 respectively; a second end of the resistor R8 is connected with a cathode of the diode D8; an anode of the diode D8 is connected with a second power supply VCC; a second end of the resistor R14 is connected with an anode of the light emitting diode LED2; a cathode of the light emitting diode LED2 is grounded; a second end of the resistor R9 is connected with a first end of the capacitor C3 and a cathode of the zener diode ZD1 respectively; a second end of the capacitor C3 is grounded; an anode of the zener diode ZD1 is connected with the second end of the capacitor C3 and grounded; a cathode of the zener diode ZD1 is connected with an output terminal VX1; The first end of the resistor R9 is also connected with a cathode of the Schottky diode D5.

5. The flare ignition drive and control circuit of claim 4 wherein, The working state detection unit (5) comprises a resistor R11, a resistor R12, a light emitting diode LED1, a capacitor C4 and a zener diode ZD3; A first end of the resistor R11 is connected with a second end of the inductor L1, a first end of the capacitor C2, a second end of the resistor R4, an anode of the Schottky diode D5 and a first end of the resistor R12 respectively; a second end of the resistor R11 is connected with a first end of the capacitor C4 and a cathode of the zener diode ZD3 respectively; a second end of the capacitor C4 is grounded; an anode of the zener diode ZD3 is connected with the second end of the capacitor C4 and grounded; a second end of the resistor R12 is connected with an anode of the light emitting diode LED1; a cathode of the light emitting diode LED1 is grounded; The second end of the resistor R11 is also connected with an output terminal VX2.

6. The flare ignition drive and control circuit of claim 5 wherein, The model of the zener diode ZD1 and the zener diode ZD3 is BZT52C5V1.

7. The flare ignition drive and control circuit of claim 6 wherein, The model of the Schottky diode D4 and the Schottky diode D5 is SS36.

8. The flare ignition drive and control circuit of any one of claims 1-7, wherein, The model of the core chip U1 is XL4501E1.

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