CN212163306U - Touch switch control circuit with state holding function - Google Patents
Touch switch control circuit with state holding function Download PDFInfo
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- CN212163306U CN212163306U CN202021068118.5U CN202021068118U CN212163306U CN 212163306 U CN212163306 U CN 212163306U CN 202021068118 U CN202021068118 U CN 202021068118U CN 212163306 U CN212163306 U CN 212163306U
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Abstract
The utility model discloses a touch-control switch control circuit with state retention function, this touch-control switch control circuit includes: the main loop comprises a first MOS tube, a fourth MOS tube, a first capacitor, a fourth resistor, a fifth resistor and a first voltage-regulator tube; the low-voltage locking circuit comprises a first resistor, a second resistor, a third resistor, an eleventh resistor, a second capacitor, a third capacitor, a second voltage-regulator tube, a third MOS tube and a second triode; the starting control circuit comprises a touch switch, a sixth resistor, a seventh resistor, an eighth resistor, a fourth capacitor, a sixth diode and a fourth voltage regulator tube; the shutdown control circuit comprises a ninth resistor, a tenth resistor, a fifth capacitor, a fifth voltage regulator tube and a fifth MOS tube; the delay filter circuit comprises a second resistor, a seventh resistor, an eighth resistor, a second capacitor and a fourth capacitor.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the avionics field especially indicates a touch switch control circuit with state retention function.
[ background of the invention ]
In addition to the on-board power supply circuit switch, the start control of the on-board power consumption device often uses a logic control signal for secondary start to control the work control of the power consumption device, and generally, the signal is usually implemented by stable logic such as grounding, power connection, conduction and the like. However, with the development of the application requirements of products, the secondary start of the electric equipment controlled by the touch switch is gradually applied. The working state of the equipment is controlled through the state change duration of the touch switch, and the working state is usually the logic of 'short touch pressing starting up and long touch pressing stopping up'.
The physical implementation of touch switch logic has been implemented in various practical circuits in electronic products. Generally, the input voltage of the circuit is stable or the fluctuation range is small, the circuit is powered on initially and is in a power-off state, the output enable is triggered after short-time touch and pressing, and the output disable is triggered after long-time touch and pressing.
In an on-board power supply environment, the related power supply compatibility requirements still need to be considered. The airborne power supply has normal and abnormal transient surge voltage, normal 50ms power supply conversion interruption, various electromagnetic interference and other power supply fluctuation processes, and the control circuit must ensure the stability of working logic under the conditions. In addition, in order to avoid the electric stress impact to the product when starting up equipment under the low-voltage condition, generally have the undervoltage locking function. The common control circuit in the existing electronic product can not completely meet the compatibility requirement and the use requirement under the airborne environment, the control circuit is reset after the input power supply fluctuates or is interrupted in a large range, and the output automatically returns to the initial shutdown state.
[ Utility model ] content
An object of the utility model is to provide a touch-control switch control circuit with state retention function can satisfy "short touch presses the start, and long touch presses the logic function of shutdown", can guarantee moreover that wide range voltage variation and short-time power supply interrupt time on-off state have the retention function.
In order to achieve the above object, the present invention provides a touch switch control circuit with a state maintaining function, including:
the main loop comprises a first MOS tube, a fourth MOS tube, a first capacitor, a fourth resistor, a fifth resistor and a first voltage-stabilizing tube, and the output state control is realized by controlling the conduction process of the first MOS tube;
the low-voltage locking circuit comprises a first resistor, a second resistor, a third resistor, an eleventh resistor, a second capacitor, a third capacitor, a second voltage-regulator tube, a third MOS tube and a second triode, and realizes the low-input voltage locking function;
the startup control circuit comprises a touch switch, a sixth resistor, a seventh resistor, an eighth resistor, a fourth capacitor, a sixth diode and a fourth voltage regulator tube, and realizes the short-press startup enabling function;
the shutdown control circuit comprises a ninth resistor, a tenth resistor, a fifth capacitor, a fifth voltage regulator tube and a fifth MOS tube, and realizes a long-press shutdown enabling function;
the delay filter circuit comprises a second resistor, a seventh resistor, an eighth resistor, a second capacitor and a fourth capacitor, and realizes the function of maintaining the circuit state when the undervoltage and the input power supply are interrupted;
the positive end of the input voltage is connected with one end of the touch switch, one end of the first resistor, one end of the third resistor, one end of the fourth resistor, one end of the first capacitor and the source electrode of the first MOS tube, the other end of the touch switch is connected with the anode of the sixth diode and one end of the ninth resistor, the cathode of the sixth diode is connected with one end of the sixth resistor, the other end of the first resistor is connected with the cathode of the second voltage-regulator tube, the anode of the second voltage-regulator tube is connected with the anode of the second capacitor, one end of the second resistor and one end of the eleventh resistor, the other end of the eleventh resistor is connected with the base electrode of the second triode, the cathode of the second capacitor, the other end of the second resistor, the emitter of the second triode, the anode of the third voltage-regulator tube, one end of the third capacitor, the source electrode of the third MOS tube, the source electrode of the fourth MOS tube, the cathode of the fourth capacitor, the anode of the fourth voltage, One end of an eighth resistor, a source electrode of a fourth MOS tube, a negative electrode of a fifth capacitor and one end of a tenth resistor are connected with an input ground, the other end of the third resistor is connected with a collector electrode of a second triode, a cathode of the third voltage-regulator tube, the other end of the third capacitor and a grid electrode of a third MOS tube, the other end of the first capacitor is connected with the cathode of the first voltage-regulator tube, the other end of the fourth resistor, the grid electrode of the first MOS tube and one end of the fifth resistor, the other end of the fifth resistor is connected with a drain electrode of the fourth MOS tube, a drain electrode of the third MOS tube is connected with the other end of a sixth resistor, the positive electrode of the fourth capacitor, the grid electrode of the fourth MOS tube, one end of a seventh resistor, the other end of the eighth resistor and the drain electrode of the fifth MOS tube, the grid electrode of the fifth MOS tube is connected with the anode of the fifth voltage-regulator tube, the cathode of the fifth voltage-regulator tube is connected with the positive electrode of the fifth capacitor, the other end, and the drain electrode of the first MOS tube is connected with the other end of the seventh resistor and the output power supply.
According to the above feature, the short time of the power-on control circuit is determined by the sixth resistor, the eighth resistor and the fourth capacitor.
According to the main characteristics, the time of the shutdown control circuit is determined by the ninth resistor, the tenth resistor, the fifth capacitor and the fifth voltage regulator tube.
According to above-mentioned leading features, implement the utility model discloses a touch-control switch control circuit with state retention function's operating voltage scope is decided by the ratio of second triode, second MOS pipe, second triode, third MOS pipe, fourth MOS pipe, the VDS withstand voltage value of fifth MOS pipe, the clamping protection of third zener diode, fourth zener diode and ninth resistance and tenth resistance.
Compared with the prior art, under the on-board power supply environment, implement the utility model discloses a touch switch control circuit with state retention function guarantees the reliable stable work of electronic equipment secondary start control function, can satisfy "the short time touches and presses the start, touches the logic function of pressing the shutdown for a long time, also can guarantee that wide range voltage variation and short time power supply interrupt time on-off state have the retention function, provides the assurance for on-board electronic equipment's power supply compatibility.
[ description of the drawings ]
Fig. 1 is a schematic circuit diagram of a touch switch control circuit with a state holding function according to the present invention.
[ detailed description ] embodiments
Fig. 1 is a schematic circuit diagram of a touch switch control circuit with a state holding function according to the present invention. The embodiment of the utility model discloses a touch switch control circuit with state retention function includes touch switch S1, first resistance R1, second resistance R2, third resistance R3, fourth resistance R4, fifth resistance R5, sixth resistance R6, seventh resistance R7, eighth resistance R8, ninth resistance R9, tenth resistance R10, eleventh resistance R11, first electric capacity C1, second electric capacity C2, third electric capacity C3, fourth electric capacity C4, fifth electric capacity C5, sixth diode D6, first stabilivolt D1, second stabilivolt D2, third stabilivolt D3, fourth stabilivolt D4, fifth stabilivolt D5, first MOS pipe Q1, second triode Q2, third MOS pipe Q3, fourth MOS pipe Q4, fifth MOS pipe Q5. The positive end of the input voltage is connected to one end of the touch switch S1, one end of the first resistor R1, one end of the third resistor R3, one end of the fourth resistor R4, one end of the first capacitor C1 and the source of the first MOS transistor Q1, the other end of the touch switch S1 is connected to the anode of the sixth diode D6 and one end of the ninth resistor R9, the cathode of the sixth diode D6 is connected to one end of the sixth resistor R6, the other end of the first resistor R1 is connected to the cathode of the second regulator D2, the anode of the second regulator D2 is connected to the anode of the second capacitor C2, one end of the second resistor R2 and one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the base of the second triode Q2, the cathode of the second capacitor C2, the other end of the second resistor R2, the emitter of the second triode Q2, the anode of the third resistor R3, one end of the third capacitor C3 and the source of the third MOS transistor Q3, A source of a fourth MOS transistor Q4, a cathode of a fourth capacitor C4, an anode of a fourth regulator D4, one end of an eighth resistor R8, a source of the fourth MOS transistor Q4, a cathode of a fifth capacitor C5, one end of a tenth resistor R10 are connected to the input ground, the other end of a third resistor R3 is connected to a collector of the second triode Q2, a cathode of the third regulator D3, the other end of the third capacitor C3, and a gate of the third MOS transistor Q3, the other end of the first capacitor C1 is connected to a cathode of the first regulator D1, the other end of a fourth resistor R4, a gate of the first MOS transistor Q1, and one end of a fifth resistor R5, the other end of the fifth resistor R5 is connected to a drain of the fourth MOS transistor Q4, a drain of the third MOS transistor Q3 is connected to the other end of the sixth resistor R6, an anode of the fourth capacitor C4, a cathode of the fourth capacitor C4, a terminal of the fourth resistor Q4, a drain of the eighth resistor Q4, and a drain 4, the grid of the fifth MOS transistor Q5 is connected with the anode of the fifth regulator D5, the cathode of the fifth regulator D5 is connected with the anode of the fifth capacitor C5, the other end of the tenth resistor R10 and the other end of the ninth resistor R9, and the drain of the first MOS transistor Q1 is connected with the other end of the seventh resistor R7 and the output power supply.
The first MOS tube Q1, the fourth MOS tube Q4, the first capacitor C1, the fourth resistor R4, the fifth resistor R5 and the first voltage regulator tube D1 form a main loop circuit, and the output state control is realized by controlling the conduction process of the first MOS tube Q1; a low-voltage locking circuit is formed by a first resistor R1, a second resistor R2, a third resistor R3, an eleventh resistor R11, a second capacitor C2, a third capacitor C3, a second voltage-regulator tube D2, a third voltage-regulator tube D3, a third MOS tube Q3 and a second triode Q2, so that the low-input-voltage locking function is realized; the touch switch S1, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the fourth capacitor C4, the sixth diode D6 and the fourth voltage regulator tube D4 form a power-on control circuit, so that the short-press power-on enabling function is realized; the touch switch S1, the ninth resistor R9, the tenth resistor R10, the fifth capacitor C5, the fifth voltage regulator D5 and the fifth MOS transistor Q5 form a shutdown control circuit, so that the long press shutdown enabling function is realized. Meanwhile, the second resistor R2, the seventh resistor R7, the eighth resistor R8, the second capacitor C2 and the fourth capacitor C4 form a delay filter circuit, so that the function of maintaining the circuit state when the input power supply is under-voltage and interrupted is realized.
After the input power of the electronic equipment is powered on, when the voltage is lower than the breakdown voltage of the second voltage-regulator tube D2, the second voltage-regulator tube D2 is in a high-resistance state, and the voltage of the base electrode of the second triode Q2 is close to zero and is in a cut-off state through a voltage division network formed by the first resistor R1, the second resistor R2, the eleventh resistor R11 and the second voltage-regulator tube D2. At this time, the gate-source voltage VGS of the third MOS transistor Q3 is the voltage output by the voltage regulator circuit formed by the third resistor R3, the third capacitor C3 and the third regulator D3. When the voltage is greater than the turn-on voltage VGS (th) of the third MOS transistor Q3, the third MOS transistor Q3 is turned on, that is, the gate-source voltage VGS of the fourth MOS transistor Q4 is zero, and is in an off state, at this time, the voltage dividing network formed by the fourth resistor R4, the fifth resistor R5, the first regulator D1, the first capacitor C1, and the fourth MOS transistor Q4 makes the gate-source voltage VGS of the first MOS transistor Q1 close to zero, and is in an off state, that is, the initial state of the circuit at the upper and lower voltage ends is in an off state. In the process, when the touch switch S1 is pressed, the third MOS transistor Q3 is in the on state, so that the fourth MOS transistor Q4 is always in the off state, the first MOS transistor Q1 cannot be driven to be turned on, and no output voltage is generated, thereby implementing the low-voltage locking function.
When the input voltage is higher than the breakdown voltage of the second voltage regulator tube D2, the voltage of the base of the second triode Q2 rises until the second triode is turned on, and the voltage VGS of the gate _ source of the third MOS transistor Q3 is close to zero and is in an off state. When the touch switch S1 is pressed for a short time, the input power supply charges the fourth capacitor C4 through the sixth diode D6 and the sixth resistor R6, when the voltage on the fourth capacitor C4 is greater than the turn-on voltage VGS (th) of the fourth MOS transistor Q4, the fourth MOS transistor Q4 is turned on, the voltage divider network composed of the fourth resistor R4, the fifth resistor R5, the first regulator D1, the first capacitor C1 and the fourth MOS transistor Q4 makes the gate-source voltage VGS of the first MOS transistor Q1 rise to drive the first MOS transistor Q1 to be turned on, the output voltage stably drives the fourth MOS transistor Q4 to be turned on through the voltage regulator circuit composed of the seventh resistor R7, the eighth resistor R8, the fourth regulator D4 and the fourth capacitor C4, and then drives the first MOS transistor Q1 to be turned on, at this time, the input power supply is no longer required to turn on the fourth MOS transistor Q4 through the sixth diode D632 and the sixth resistor R6, thereby ensuring that the fourth MOS transistor Q8653 is turned on, and the function is turned on, i.e. when the touch switch is turned on, the short time is determined by the sixth resistor R6, the eighth resistor R8 and the fourth capacitor C4.
After the power-on, when the external short-time power supply is interrupted (300ms), the second capacitor C2 discharges through the network formed by the second resistor R2, the eleventh resistor R11, the second voltage regulator tube D2, the second triode Q2 and the first resistor R1, and in the process, although the voltage on the second capacitor C2 drops, the second triode Q2 can still be effectively driven to be switched on, the third MOS tube Q3 is kept to be switched off, the fourth MOS tube Q4 is not switched off due to the input short-time power failure, and the first MOS tube Q1 is further switched off. Meanwhile, the fourth capacitor C4 discharges through a network formed by the seventh resistor R7, the eighth resistor R8 and the fourth voltage regulator D4, and in the process, although the voltage on the fourth capacitor C4 drops, the fourth MOS transistor Q4 can still be effectively driven, so that the first MOS transistor Q1 is ensured to be stably conducted. Thereby realizing a function of controlling the state retention of the circuit at the time of an external short-time power supply interruption (300 ms).
When the touch switch S1 is pressed on for a long time, the fifth capacitor C5 is charged by the input power through the voltage dividing network formed by the ninth resistor R9 and the tenth resistor R10, and when the voltage across the fifth capacitor C5 is greater than the sum of the breakdown voltage of the fifth voltage regulator D5 and the turn-on voltage vgs (th) of the fifth MOS transistor Q5, the fifth MOS transistor Q5 is turned on, the fourth MOS transistor Q4 is turned off, and the first MOS transistor Q1 is turned off, that is, the output is turned off, thereby realizing the long press shutdown function. The time length is determined by a ninth resistor R9, a tenth resistor R10, a fifth capacitor C5 and a fifth regulator tube D5.
By reasonably selecting the VDS withstand voltage values of the second triode Q2, the second MOS tube Q1, the second triode Q2, the third MOS tube Q3, the fourth MOS tube Q4 and the fifth MOS tube Q5, the clamping protection of the third voltage-stabilizing diode D3 and the fourth voltage-stabilizing tube D4 and the proportion of the ninth resistor R9 and the tenth resistor R10, the reliable work of the control circuit in the range of 10V-80V can be ensured.
Compared with the prior art, under the on-board power supply environment, implement the utility model discloses a touch switch control circuit with state retention function guarantees the reliable stable work of electronic equipment secondary start control function, can satisfy "the short time touches and presses the start, touches the logic function of pressing the shutdown for a long time, also can guarantee that wide range voltage variation and short time power supply interrupt time on-off state have the retention function, provides the assurance for on-board electronic equipment's power supply compatibility.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (4)
1. A touch switch control circuit with a state holding function is characterized by comprising:
the main loop comprises a first MOS tube, a fourth MOS tube, a first capacitor, a fourth resistor, a fifth resistor and a first voltage-regulator tube, and the output state control is realized by controlling the conduction process of the first MOS tube;
the low-voltage locking circuit comprises a first resistor, a second resistor, a third resistor, an eleventh resistor, a second capacitor, a third capacitor, a second voltage-regulator tube, a third MOS tube and a second triode, and realizes the low-input voltage locking function;
the startup control circuit comprises a touch switch, a sixth resistor, a seventh resistor, an eighth resistor, a fourth capacitor, a sixth diode and a fourth voltage regulator tube, and realizes the short-press startup enabling function;
the shutdown control circuit comprises a ninth resistor, a tenth resistor, a fifth capacitor, a fifth voltage regulator tube and a fifth MOS tube, and realizes a long-press shutdown enabling function;
the delay filter circuit comprises a second resistor, a seventh resistor, an eighth resistor, a second capacitor and a fourth capacitor, and realizes the function of maintaining the circuit state when the undervoltage and the input power supply are interrupted;
the positive end of the input voltage is connected with one end of the touch switch, one end of the first resistor, one end of the third resistor, one end of the fourth resistor, one end of the first capacitor and the source electrode of the first MOS tube, the other end of the touch switch is connected with the anode of the sixth diode and one end of the ninth resistor, the cathode of the sixth diode is connected with one end of the sixth resistor, the other end of the first resistor is connected with the cathode of the second voltage-regulator tube, the anode of the second voltage-regulator tube is connected with the anode of the second capacitor, one end of the second resistor and one end of the eleventh resistor, the other end of the eleventh resistor is connected with the base electrode of the second triode, the cathode of the second capacitor, the other end of the second resistor, the emitter of the second triode, the anode of the third voltage-regulator tube, one end of the third capacitor, the source electrode of the third MOS tube, the source electrode of the fourth MOS tube, the cathode of the fourth capacitor, the anode of the fourth voltage, One end of an eighth resistor, a source electrode of a fourth MOS tube, a negative electrode of a fifth capacitor and one end of a tenth resistor are connected with an input ground, the other end of the third resistor is connected with a collector electrode of a second triode, a cathode of the third voltage-regulator tube, the other end of the third capacitor and a grid electrode of a third MOS tube, the other end of the first capacitor is connected with the cathode of the first voltage-regulator tube, the other end of the fourth resistor, the grid electrode of the first MOS tube and one end of the fifth resistor, the other end of the fifth resistor is connected with a drain electrode of the fourth MOS tube, a drain electrode of the third MOS tube is connected with the other end of a sixth resistor, the positive electrode of the fourth capacitor, the grid electrode of the fourth MOS tube, one end of a seventh resistor, the other end of the eighth resistor and the drain electrode of the fifth MOS tube, the grid electrode of the fifth MOS tube is connected with the anode of the fifth voltage-regulator tube, the cathode of the fifth voltage-regulator tube is connected with the positive electrode of the fifth capacitor, the other end, and the drain electrode of the first MOS tube is connected with the other end of the seventh resistor and the output power supply.
2. The touch switch control circuit with state retention of claim 1, wherein: the short time of the starting-up control circuit is determined by the sixth resistor, the eighth resistor and the fourth capacitor.
3. The touch switch control circuit with state retention of claim 1, wherein: the time of the shutdown control circuit is determined by a ninth resistor, a tenth resistor, a fifth capacitor and a fifth voltage regulator tube.
4. The touch switch control circuit with state retention of claim 1, wherein: the working voltage range of the touch switch control circuit with the state holding function is determined by VDS withstand voltage values of the second triode, the second MOS tube, the second triode, the third MOS tube, the fourth MOS tube and the fifth MOS tube, clamping protection of the third voltage stabilizing diode and the fourth voltage stabilizing tube and the proportion of the ninth resistor and the tenth resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021068118.5U CN212163306U (en) | 2020-06-11 | 2020-06-11 | Touch switch control circuit with state holding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021068118.5U CN212163306U (en) | 2020-06-11 | 2020-06-11 | Touch switch control circuit with state holding function |
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| Publication Number | Publication Date |
|---|---|
| CN212163306U true CN212163306U (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021068118.5U Active CN212163306U (en) | 2020-06-11 | 2020-06-11 | Touch switch control circuit with state holding function |
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| CN (1) | CN212163306U (en) |
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2020
- 2020-06-11 CN CN202021068118.5U patent/CN212163306U/en active Active
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