CN114237092B - Level signal type on-off control circuit - Google Patents
Level signal type on-off control circuit Download PDFInfo
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- CN114237092B CN114237092B CN202111368734.1A CN202111368734A CN114237092B CN 114237092 B CN114237092 B CN 114237092B CN 202111368734 A CN202111368734 A CN 202111368734A CN 114237092 B CN114237092 B CN 114237092B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
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Abstract
The invention relates to a level signal type on-off control circuit in the technical field of power supply, which comprises: a power-on time sequence control unit (101) and a switch unit (102), wherein the power-on time sequence control unit (101) is used for generating a level signal for controlling the on-off action of the switch unit (102); the switch unit (102) is used for receiving the level signal output by the power-on time sequence control unit (101) and executing the completion on-state action or the off-state action according to the level signal so as to realize power supply to a load. The invention overcomes the defects of complex structure, easy misoperation and incapability of realizing the power-on time sequence control function of the traditional power-on/off circuit, realizes the self-adaptive power-on time sequence control function of two power supplies which are not in common ground, and has the characteristics of small volume, strong anti-interference capability and high power-on/off reliability.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a level signal type on-off control circuit.
Background
With the increasing demand of space missions, the variety of on-board electric equipment is also increased, but the safety and reliability of satellites are continuously reduced with the increase of electric equipment. In order to ensure that the functions, the performances and the safety and the reliability of the whole star are not affected when a certain electric equipment fails, new requirements are provided for the switch controllability and the power-on time sequence of each electric equipment.
The on-board on-off command circuit is required to be an isolated control circuit, and most of the on-board on-off command circuits are pulse command circuits. When the on-off instruction circuit is designed by adopting the comparator, if the anti-interference function is not designed, the comparator is influenced by single particles in the space environment, and the corresponding function interruption of the electric equipment is easily caused by misoperation. Even equipment damage occurs to the electric equipment with time sequence requirements.
Under the condition that the number of electronic devices on the satellite is continuously increased, in order to reduce the whole satellite power consumption, when one electronic device is shut down, other electronic devices which work in cascade are required to be turned off in time. When the whole satellite remote control signal resource is limited, the on-off control of each device can not be realized through a remote control instruction, the independent power utilization time sequence control and the on-off function control are required to be formed among a plurality of devices, and particularly, the situation that multiple outputs are not commonly grounded is caused, and the effective power utilization time sequence control is required to be realized.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a level signal type on-off control circuit, which solves the problems that the existing on-off instruction circuit cannot realize a power-on time sequence control function and is easily influenced by single particles in a space environment to cause misoperation so as to interrupt electronic equipment.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the invention provides a level signal type on-off control circuit, which comprises: a power-on time sequence control unit and a switch unit,
The power-on time sequence control unit is used for outputting a level signal to the switch unit and controlling the on-off action of the switch unit;
The switch unit is used for receiving the level signal output by the power-on time sequence control unit and executing the completion of the opening action or the closing action according to the level signal so as to realize the power supply to the load. .
According to an aspect of the present invention, the power-on timing control unit includes: a first power-on level positive line, a first power-on level return line, a photoelectric coupler, an isolation diode, a first filter resistor, a first bleeder resistor, a first filter capacitor and a second bleeder resistor,
The positive electrode of the isolation diode is connected with the positive line of the first power-on level, and the negative electrode of the isolation diode is connected with the first end of the first filter resistor;
the second end of the first filter resistor is connected with the first end of the first bleeder resistor, the first end of the first filter capacitor and the first end of the photoelectric coupler,
The second end of the first bleeder resistor is connected with the second end of the first filter capacitor, the second end of the photoelectric coupler and the first power-on level loop;
the first end of the second bleeder resistor is connected with the third end of the photoelectric coupler, and the second end of the second bleeder resistor is connected with the fifth end of the photoelectric coupler;
the optocoupler further includes a fourth terminal.
According to one aspect of the present invention, the level signal output from the power-on timing control unit is transferred to the switching unit through the fourth and fifth terminals of the photo coupler,
The fourth end and the fifth end of the photoelectric coupler are respectively a first output end and a second output end of the power-on time sequence control unit.
According to an aspect of the present invention, the switching unit includes: a hysteresis power-on level positive line, a hysteresis power-on level return line, a triode, a field effect transistor, a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor, a fourth voltage dividing resistor, a fifth voltage dividing resistor, a sixth voltage dividing resistor, a seventh voltage dividing resistor, a second filter capacitor, a third filter capacitor, an anti-oscillation resistor and a diode,
The first end of the first voltage dividing resistor is connected with the hysteresis power-on level positive line, the first end of the second voltage dividing resistor and the first end of the fifth voltage dividing resistor, and the second end of the first voltage dividing resistor is connected with the second end of the second voltage dividing resistor, the first end of the third voltage dividing resistor and the first output end of the power-on time sequence control unit;
The first end of the third voltage dividing resistor is connected with the second output end of the power-on time sequence control unit, and the second end of the third voltage dividing resistor is connected with the first end of the fourth voltage dividing resistor and the first end of the second filter resistor;
The second end of the fourth voltage dividing resistor is connected with the second output end of the power-on time sequence control unit and the emitter of the triode;
the second end of the second filter resistor is connected with the first end of the second filter capacitor and the base electrode of the triode;
the second end of the second filter capacitor is connected with the hysteresis power-on level loop;
the collector of the triode is connected with the second end of the fifth divider resistor, the first end of the sixth divider resistor and the cathode of the diode;
the positive electrode of the diode is connected with the hysteresis power-on level loop;
the second end of the sixth voltage dividing resistor is connected with the first end of the seventh voltage dividing resistor, the first end of the anti-oscillation resistor and the first end of the third filter capacitor;
the second end of the seventh voltage dividing resistor is connected with the hysteresis power-on level loop;
the second end of the second filter capacitor is connected with the hysteresis power-on level loop;
the second end of the anti-oscillation resistor is connected with the drain electrode of the field effect transistor;
And the grid electrode of the field effect tube is connected with the hysteresis power-on level loop, and the source electrode of the field effect tube is the output end of the switch unit.
According to one aspect of the invention, when the circuit is in an initial state, a high level is input through a positive line of a delayed power-on level, a triode is turned on, and a field effect transistor is turned off, so that the switch unit is in an off state.
According to one aspect of the invention, when a high level is input through the first power-on level positive line and a level signal is not input through the second power-on level positive line, the photoelectric coupler of the power-on time sequence control unit is turned on, the triode of the switching unit is turned off, and the field effect transistor is turned on, so that the switching unit is turned on.
According to one aspect of the invention, when a low level is input through a positive line of a power-up level, the photoelectric coupler of the power-up time sequence control unit is turned off, the triode of the switching unit is turned on, and the field effect transistor is turned off, so that the switching unit is turned off.
The beneficial effects are that:
According to the scheme of the invention, the power-on time sequence control circuit and the level signal type command switch circuit are formed by the photoelectric coupler, the triode, the MOS tube and the peripheral circuit thereof, the level signal which is electrified first in the time sequence requirement is used as the control signal of the lagging power-on level, the self-adaptive power-on time sequence control function of two paths of power supplies which are not commonly grounded is realized, the on-off control is not required by a whole-satellite remote control command, and the problem of insufficient remote control resources under the condition that the number of whole-satellite electric equipment, particularly load equipment, is increased greatly can be solved.
According to one scheme of the invention, the design is carried out by adopting a photoelectric coupler and a triode to replace a complex circuit structure of a relay or a voltage comparator, so that the defects that the relay is insufficient in switching times and derating when instructions are frequently operated under long-term working conditions, and the voltage comparator is easy to turn over and unstable due to single particles under space environment irradiation conditions are overcome, and the device has the characteristics of high reliability and small volume.
According to one scheme of the invention, when the photoelectric coupler and the triode are used as core devices in the prior art to realize the on-off control function, the state of the output end of the photoelectric coupler is used for controlling the state of the base electrode of the triode, and when the output end of the photoelectric coupler is in a low-resistance state, the base electrode of the triode of the control circuit cannot be clamped to an effective low level, and the possibility of wrong conduction exists in the triode, so that the on-off function is unreliable. The invention designs a circuit for improving the reliability of the switching-on and switching-off functions, namely, the output end of the photoelectric coupler is connected to the base electrode of the control triode after voltage division is set, so that when the output end of the photoelectric coupler is low, the base electrode level of the triode is lower, the triode is ensured to be unable to be switched on, and the reliability of the switching-on function is improved.
Drawings
Fig. 1 schematically illustrates a unit composition diagram of a level signal type on-off control circuit according to an embodiment of the present invention;
Fig. 2 schematically shows a specific configuration of a level signal type on-off control circuit according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
The present invention will be described in detail below with reference to the drawings and the specific embodiments, which are not described in detail herein, but the embodiments of the present invention are not limited to the following embodiments.
Fig. 1 schematically shows a block diagram of a level signal type on-off control circuit according to the present embodiment. As shown in fig. 1, the level signal type switching control circuit of the present embodiment mainly includes a power-on timing control unit 101 and a switching unit 102. The power-on timing control unit 101 outputs a high level signal or a low level signal and transmits the high level signal or the low level signal to the switch unit 102, so as to control the switch unit 102 to complete the on-off operation. The switching unit 102 completes the corresponding on-off action by receiving the level signal instruction output by the power-on time sequence control unit 101, and simultaneously supplies power to the load connected with the switching unit. The circuit is a novel control circuit which is compatible with the power-on time sequence control unit 101 and the switching unit 102, can solve the technical defect that the power-on time sequence control function cannot be realized by the existing switching circuit, simultaneously realizes the autonomous power-on time sequence control and the power-on function control of a plurality of on-board electric equipment, and further realizes the power-on and power-off control function of the on-board electric equipment through remote control instructions so as to adapt to the space environment with limited resources.
Fig. 2 schematically shows a specific configuration of the level signal type on-off control circuit of the present embodiment. As shown in fig. 2, the power-on timing control unit 101 in the level signal type power-on/off control circuit specifically includes: the device comprises a first power-on level positive line (or called a control level signal positive line), a first power-on level loop (or called a control level signal loop), a photoelectric coupler U1, an isolation diode D1, a first filter resistor R7, a first bleeder resistor R8, a first filter capacitor C3 and a second bleeder resistor R9. The optocoupler U1 comprises a first end 1, a third end 4, a second end 6, a fourth end 3 and a fifth end 5. The first end 1 and the second end 6 are respectively the anode and the cathode of the photodiode in the photoelectric coupler U1, and the third end 4, the fourth end 3 and the fifth end 5 are respectively the base electrode (B pole), the emitter electrode (E pole) and the collector electrode (C pole) of the triode on the secondary side of the photoelectric coupler U1. Meanwhile, the fourth end 3 and the fifth end 5 of the photo coupler U1 are a first output end and a second output end of the power-on timing control unit 101, respectively.
The positive electrode of the isolation diode D1 is connected with the positive line of the first power-on level, and the negative electrode of the isolation diode D1 is connected with the first end of the first filter resistor R7. The second end of the first filter resistor R7 is connected to the first end of the first bleeder resistor R8, the first end of the first filter capacitor C3, and the first end 1 of the photo coupler U1. The second end of the first bleeder resistor R8 is connected with the second end of the first filter capacitor C3, the second end 6 of the photoelectric coupler U1 and the first power-on level loop. The first end of the second bleeder resistor R9 is connected to the third end 4 of the photo coupler U1, and the second end of the second bleeder resistor R9 is connected to the fifth end 5 of the photo coupler U1.
The switching unit 102 in the level signal type switching control circuit specifically includes: the hysteresis power-on level positive line (or referred to as an input positive line), the hysteresis power-on level loop (or referred to as an input loop), the triode Q1, the field effect transistor M1 (MOS transistor), the first voltage dividing resistor R1, the second voltage dividing resistor R2, the third voltage dividing resistor R10, the fourth voltage dividing resistor R12, the fifth voltage dividing resistor R3, the sixth voltage dividing resistor R4, the seventh voltage dividing resistor R6, the second filter resistor R11, the second filter capacitor C1, the third filter capacitor C2, the anti-oscillation resistor R5 and the diode Z1.
The first end of the first voltage dividing resistor R1 is connected to the hysteresis power-up level positive line, the first end of the second voltage dividing resistor R2, and the first end of the fifth voltage dividing resistor R3, and the second end of the first voltage dividing resistor R1 is connected to the second end of the second voltage dividing resistor R2, the first end of the third voltage dividing resistor R10, and the first output end of the power-up timing control unit 101. The first end of the third voltage dividing resistor R10 is connected to the second output end of the power-on timing control unit 101, and the second end of the third voltage dividing resistor R10 is connected to the first end of the fourth voltage dividing resistor R12 and the first end of the first filter resistor R11. The second end of the fourth voltage dividing resistor R12 is connected to the second output end of the power-on timing control unit 101 and the emitter (E pole) of the triode Q1. The second end of the second filter resistor R11 is connected to the first end of the second filter capacitor C1 and the base (B pole) of the triode Q1. The second end of the second filter capacitor C1 is connected with a hysteresis power-on level loop. The collector (C-pole) of the transistor Q1 is connected to the second end of the fifth voltage dividing resistor R3, the first end of the sixth voltage dividing resistor R4, and the negative electrode of the diode Z1. The positive electrode of the diode Z1 is connected with a hysteresis power-on level loop. The second end of the sixth voltage dividing resistor R4 is connected to the first end of the seventh voltage dividing resistor R6, the first end of the anti-oscillation resistor R5, and the first end of the third filter capacitor C2. The second end of the seventh voltage dividing resistor R6 is connected with a hysteresis power-on level loop. The second end of the third filter capacitor C2 is connected with a hysteresis power-on level loop. The second terminal of the anti-oscillation resistor R5 is connected to the drain (D-pole) of the field-effect transistor M1. The gate (G pole) of the field effect transistor M1 is connected to the hysteresis power-up level loop, and the source (S pole) of the field effect transistor M1 is the output end of the switching unit 102.
In the circuit shown in fig. 2 in this embodiment, after passing through the first voltage dividing resistor R1, the second voltage dividing resistor R2, the third voltage dividing resistor R10 and the fourth voltage dividing resistor R12, the hysteresis power-up level positive line of the switching unit 102 is connected to the base of the triode Q1 through a filter circuit formed by the second filter resistor R11 and the second filter capacitor C1, so as to control the on or off of the triode Q1 under the control signal action of the level command of the power-up time sequence control unit. Meanwhile, the hysteresis power-up level positive line is connected to the grid electrode of the field effect tube M1 through the fifth voltage dividing resistor R3, the sixth voltage dividing resistor R4 and the seventh voltage dividing resistor R6, the third filter capacitor C2 and the anti-oscillation resistor R5, and the on or off of the field effect tube M1 is controlled, namely whether the hysteresis power-up level is normally output is controlled. Here, the field effect transistor M1 is a switch of the switching unit 102, connects a load, and supplies power to the load. The third filter capacitor C2 has a filtering function, so that the field effect transistor M1 is charged slowly, starting vibration is prevented, and the field effect transistor M1 can be protected. The anti-oscillation resistor R5 can prevent voltage oscillation and current surge. In addition, the diode Z1 can prevent the gate voltage of the field effect transistor M1 from being too high and has a voltage stabilizing function, so that the field effect transistor M1 can be protected from being damaged.
The power-on time sequence control unit 101 inputs a level signal by leading a power-on level positive line, passes through the isolation diode D1, and is connected to the positive electrode of the light emitting diode of the photoelectric coupler U1 after passing through the first filter resistor R7, the first bleeder resistor R8 and the first filter capacitor C3, and is connected to the base electrode of the triode Q1 after passing through the third divider resistor R10 and the fourth divider resistor R12 and then is connected to the base electrode of the triode Q1 by a filter circuit consisting of the second filter resistor R11 and the second filter capacitor C1 to control the on or off of the triode Q1. The isolation diode D1 prevents the negative and positive electrodes at the input end of the power-on timing control unit 101 from being connected reversely. The circuit formed by the first filter resistor R7, the first bleeder resistor R8 and the first filter capacitor C3 can filter the interference spike signal generated in the process of powering up the first power-up level positive line, so as to avoid misleading the triode Q1, and further avoid generating misoperation of the switch unit 102. The filter circuit formed by the second filter resistor R11 and the second filter capacitor C1 can filter unintentional interference signals in the level control signal or the level instruction output by the power-on time sequence control unit 101 for the switch unit 102, so as to improve the reliability of the switch unit 102 for receiving the control signal. In addition, the two ends of the second bleeder resistor R9 are respectively connected with the base electrode and the emitter electrode of the triode at the secondary side of the photoelectric coupler U1, so that the photoelectric coupler U1 can be prevented from being damaged by static electricity, and the photoelectric coupler U1 is protected.
When the circuit is in an initial state, in the process of establishing the hysteresis power-up level positive line voltage signal, that is to say, the switch unit 102 inputs a high level through the hysteresis power-up level positive line, passes through the voltage dividing circuit formed by the first voltage dividing resistor R1 to the fourth voltage dividing resistor R12, passes through the filter circuit and is connected to the base electrode of the triode Q1, and the triode Q1 is conducted earlier than the field effect transistor M1 by setting reasonable resistance values and capacitance values for the voltage dividing resistor, the filter resistor and the filter capacitor respectively. Because the collector of the triode Q1 is connected to the gate of the field effect transistor M1, the gate level of the switching field effect transistor M1 is lowered by the initial conduction of the triode Q1, so that the field effect transistor M1 is turned off, namely the switching unit 102 is in an off state.
When the power-on time sequence control unit 101 inputs a high level by leading a power-on level positive line and inputs a level signal without lagging the power-on level positive line, a current passes through the light emitting diode side of the photoelectric coupler U1, so that a PN junction between the collector and the emitter of the triode at the secondary side of the photoelectric coupler U1 is conducted, the collector of the triode of the photoelectric coupler U1 is low, and the level is the voltage drop of one PN junction. After passing through the third voltage dividing resistor R10 and the fourth voltage dividing resistor R12, the base voltage of the triode Q1 is lower, so that the triode Q1 cannot be turned on. At this time, the gate of the switch field effect transistor M1 is kept at a high level under the voltage division effect of the positive line of the delayed power-up level, the switch field effect transistor M1 is turned on, and the delayed power-up level of the switch unit 102 is normally output, so that a reliable starting effect is achieved.
When the low level is input through the positive line of the initial power-on level, no current passes through the light emitting diode side of the photoelectric coupler U1 of the power-on time sequence control unit 101, so that the PN junction between the collector and the emitter of the triode on the secondary side of the photoelectric coupler U1 cannot be conducted, the collector of the triode of the photoelectric coupler U1 is in a high resistance state, under the action of the positive line of the delayed power-on level, the base voltage of the triode Q1 is caused to be in a high level, conduction between the collector and the emitter of the triode Q1 is ensured, the grid level of the switching field effect transistor M1 is pulled down at the moment, the switching field effect transistor M1 cannot be conducted, and the delayed power-on level of the switching unit 102 cannot be output, thereby achieving the shutdown effect.
In summary, the level signal type on/off control circuit of the embodiment adopts a structural design composed of the photoelectric coupler U1 and its peripheral circuit, the triode Q1 and its peripheral circuit, and the driving peripheral circuit of the MOS transistor, and performs selection of components of the peripheral circuits and reasonable setting of resistance-capacitance parameters, so as to realize the level signal type on/off control function and the power-on time sequence control function, and has the characteristics of small volume, strong anti-interference capability and high on/off reliability. The defects that the existing switching-on and switching-off circuit is complex in structure, easy to malfunction and incapable of realizing a power-on time sequence control function are overcome by replacing a comparator or relay structure of the existing switching-on and switching-off circuit with the photoelectric coupler U1 and the triode Q1.
(1) Realize the function of switching on and switching off the level instruction
The level control signal is connected to the input end of the photoelectric coupler U1, the output end of the photoelectric coupler U1 is connected with the B pole of the triode Q1, the C pole of the triode Q1 is connected to the driving G pole of the MOS tube, a main functional circuit is formed, and the on-off control of the level signal is realized.
Initial state: the input positive line is connected to the end B of the triode Q1 through the voltage dividing resistor, the electrode C of the triode Q1 is connected to the electrode G of the MOS tube, when the input bus gradually rises, the triode Q1 is turned on preferentially than the MOS tube through reasonable voltage dividing setting, the driving voltage of the MOS tube is lowered, at the moment, the MOS tube is in an off state, a power link is opened, and the MOS tube is in an off state.
And (3) starting up control: when the level control signal is high in level, the output end of the photoelectric coupler U1 is turned on to pull the B pole of the triode Q1 low, so that the triode Q1 is in an off state, the CE of the triode Q1 is in a high-resistance state, the G pole level of the MOS tube is in a high level after the input positive line passes through voltage division, the MOS tube is turned on, and the load is started to work normally.
And (3) shutdown control: when the level control signal is at a low level, the output end of the photoelectric coupler U1 is in a high-resistance state, namely the B pole of the triode Q1 is at a high potential, the CE of the triode Q1 is conducted, the G pole of the MOS tube is pulled down to a zero potential, the MOS tube cannot be conducted, the power link is in an open circuit state, and the load is turned off.
(2) Realize the power-on time sequence control function
When the power-on time sequence of the load has a requirement, an output level signal which is electrified preferentially is connected to the input end of the photoelectric coupler U1 to control whether the delayed power-on output level exists or not, and the power-on time sequence control under the condition that two paths of output power supplies are not grounded together can be realized due to the design of the photoelectric coupler U1.
When the level signal requiring the first power-on is established to be high level, the output end of the photoelectric coupler U1 is low level at the moment, the B pole of the triode Q1 in the time sequence control circuit of the later power-on level is pulled down, the C pole of the triode Q1 is in a high-resistance state, the driving G of the MOS tube is extremely high level, the MOS tube is turned on, and the level lagging the power-on begins to output high level.
When the level signal of the first power-on is changed into the low level, the output end of the photoelectric coupler U1 is at the high level, the B electrode of the triode Q1 is at the high level, the triode Q1 is on, the C electrode is at the low resistance state, the MOS tube drives the G electrode to be at the low level, the MOS tube is off, and the level of the later power-on is not output.
The above description is only one embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A level signal type on-off control circuit, characterized by comprising: a power-on time sequence control unit (101) and a switch unit (102),
The power-on time sequence control unit (101) is used for generating a level signal for controlling the on-state or off-state of the switch unit (102);
The switch unit (102) is used for receiving the level signal output by the power-on time sequence control unit (101) and executing the completion of the on-off action according to the level signal so as to realize the power supply to the load;
The power-on timing control unit (101) includes: a first power-on level positive line, a first power-on level return line, a photoelectric coupler (U1), an isolation diode (D1), a first filter resistor (R7), a first bleeder resistor (R8), a first filter capacitor (C3) and a second bleeder resistor (R9),
The positive electrode of the isolation diode (D1) is connected with the positive line of the initial power-on level, and the negative electrode of the isolation diode is connected with the first end of the first filter resistor (R7);
The second end of the first filter resistor (R7) is connected with the first end of the first bleeder resistor (R8), the first end of the first filter capacitor (C3) and the first end (1) of the photoelectric coupler (U1),
The second end of the first bleeder resistor (R8) is connected with the second end of the first filter capacitor (C3), the second end (6) of the photoelectric coupler (U1) and the first power-on level loop;
The first end of the second bleeder resistor (R9) is connected with the third end (4) of the photoelectric coupler (U1), and the second end of the second bleeder resistor is connected with the fifth end (5) of the photoelectric coupler (U1);
the optocoupler (U1) further comprises a fourth end (3).
2. The level signal type on-off control circuit according to claim 1, wherein the level signal outputted from the power-on timing control unit (101) is transferred to the switching unit (102) through a fourth terminal (3) and a fifth terminal (5) of the photo coupler (U1),
The fourth end (3) and the fifth end (5) of the photoelectric coupler (U1) are respectively a first output end and a second output end of the power-on time sequence control unit (101).
3. The level signal type switching control circuit according to claim 1, wherein the switching unit (102) includes: a hysteresis power-up level positive line, a hysteresis power-up level return line, a triode (Q1), a field effect transistor (M1), a first voltage dividing resistor (R1), a second voltage dividing resistor (R2), a third voltage dividing resistor (R10), a fourth voltage dividing resistor (R12), a fifth voltage dividing resistor (R3), a sixth voltage dividing resistor (R4), a seventh voltage dividing resistor (R6), a second filter resistor (R11), a second filter capacitor (C1), a third filter capacitor (C2), an anti-oscillation resistor (R5) and a diode (Z1),
The first end of the first voltage dividing resistor (R1) is connected with the hysteresis power-on level positive line, the first end of the second voltage dividing resistor (R2) and the first end of the fifth voltage dividing resistor (R3), and the second end of the first voltage dividing resistor is connected with the second end of the second voltage dividing resistor (R2), the first end of the third voltage dividing resistor (R10) and the first output end of the power-on time sequence control unit (101);
The first end of the third voltage dividing resistor (R10) is connected with the second output end of the power-on time sequence control unit (101), and the second end of the third voltage dividing resistor is connected with the first end of the fourth voltage dividing resistor (R12) and the first end of the second filter resistor (R11);
The second end of the fourth voltage dividing resistor (R12) is connected with the second output end of the power-on time sequence control unit (101) and the emitter of the triode (Q1);
the second end of the second filter resistor (R11) is connected with the first end of the second filter capacitor (C1) and the base electrode of the triode (Q1);
The second end of the second filter capacitor (C1) is connected with the hysteresis power-on level loop;
the collector of the triode (Q1) is connected with the second end of the fifth voltage dividing resistor (R3), the first end of the sixth voltage dividing resistor (R4) and the negative electrode of the diode (Z1);
the positive electrode of the diode (Z1) is connected with the hysteresis power-on level loop;
the second end of the sixth voltage dividing resistor (R4) is connected with the first end of the seventh voltage dividing resistor (R6), the first end of the anti-oscillation resistor (R5) and the first end of the third filter capacitor (C2);
the second end of the seventh voltage dividing resistor (R6) is connected with the hysteresis power-on level loop;
the second end of the third filter capacitor (C2) is connected with the hysteresis power-on level loop;
The second end of the anti-oscillation resistor (R5) is connected with the drain electrode of the field effect transistor (M1);
the grid electrode of the field effect tube (M1) is connected with the hysteresis power-on level loop, and the source electrode of the field effect tube (M1) is the output end of the switch unit (102).
4. A level signal type switching control circuit according to any one of claims 1 to 3, wherein when the circuit is in an initial state, a high level is inputted through a hysteresis power-up level positive line, a transistor (Q1) is turned on, a field effect transistor (M1) is turned off, and the switching unit (102) is in an off state.
5. A level signal type switching control circuit according to any one of claims 1 to 3, wherein when a high level is inputted through a first power-up level positive line and a level signal is inputted not through a later power-up level positive line, a photo coupler (U1) of the power-up timing control unit (101) is turned on, a transistor (Q1) of the switching unit (102) is turned off, and a field effect transistor (M1) is turned on, so that the switching unit (102) is turned on.
6. A level signal type switching control circuit according to any one of claims 1 to 3, wherein when a low level is inputted through a first power-up level positive line, a photo coupler (U1) of the power-up timing control unit (101) is turned off, a transistor (Q1) of the switching unit (102) is turned on, and a field effect transistor (M1) is turned off, so that the switching unit (102) is turned off.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111368734.1A CN114237092B (en) | 2021-11-18 | 2021-11-18 | Level signal type on-off control circuit |
| PCT/CN2022/115611 WO2023087840A1 (en) | 2021-11-18 | 2022-08-29 | Level signal-type startup and shutdown control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111368734.1A CN114237092B (en) | 2021-11-18 | 2021-11-18 | Level signal type on-off control circuit |
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| Publication Number | Publication Date |
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| CN114237092A CN114237092A (en) | 2022-03-25 |
| CN114237092B true CN114237092B (en) | 2024-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111368734.1A Active CN114237092B (en) | 2021-11-18 | 2021-11-18 | Level signal type on-off control circuit |
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| Country | Link |
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| CN (1) | CN114237092B (en) |
| WO (1) | WO2023087840A1 (en) |
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| CN114237092B (en) * | 2021-11-18 | 2024-08-30 | 北京卫星制造厂有限公司 | Level signal type on-off control circuit |
| CN117644850A (en) * | 2023-11-27 | 2024-03-05 | 东风汽车集团股份有限公司 | Brake pedal control circuit and control method meeting functional safety |
Citations (1)
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| CN102809931A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit for power supply |
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| DE19939567B4 (en) * | 1999-08-20 | 2007-07-19 | Pilz Gmbh & Co. Kg | Device for controlling safety-critical processes |
| CN201248033Y (en) * | 2008-08-25 | 2009-05-27 | 青岛海信电器股份有限公司 | Sequence control circuit and television set with the circuit |
| CN101963792B (en) * | 2010-10-29 | 2012-08-22 | 珠海市鑫和电器有限公司 | Time sequence control circuit and control method thereof |
| EP2594948A4 (en) * | 2011-03-15 | 2015-03-18 | Sunsun Lighting China Co Ltd | Current sensing circuit and control circuit thereof and power converter circuit |
| CN103901991A (en) * | 2012-12-26 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Power source sequential circuit |
| CN104635569B (en) * | 2014-12-09 | 2017-06-30 | 青岛歌尔声学科技有限公司 | A kind of multimode sequential control circuit |
| CN106371334B (en) * | 2015-07-21 | 2019-03-01 | 深圳市奇辉电气有限公司 | A kind of Power-up/down time sequence control circuit and power-supply system |
| CN106020004B (en) * | 2016-07-25 | 2018-09-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Power-off sequential control circuit and control method on a kind of power supply |
| CN106773905B (en) * | 2016-11-24 | 2019-02-05 | 中国船舶重工集团公司第七一六研究所 | A kind of disappeared based on power supply timing trembles the switching value output circuit of control |
| US10734891B2 (en) * | 2017-10-13 | 2020-08-04 | Qualcomm Incorporated | Power-up sequencing and high voltage protection for charge pump converters |
| CN107919794A (en) * | 2017-11-13 | 2018-04-17 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne high voltage direct current controller delays powering method |
| CN208257783U (en) * | 2018-06-13 | 2018-12-18 | 河南森源电气股份有限公司 | A kind of more power supply electrifying sequential control circuits |
| CN209014935U (en) * | 2018-08-20 | 2019-06-21 | 合肥华耀电子工业有限公司 | A kind of switching on and shutting down sequential control circuit with interlock function |
| CN110099234B (en) * | 2019-05-08 | 2021-07-30 | 深圳创维－Rgb电子有限公司 | A power starting device and a TV |
| CN212785304U (en) * | 2020-06-03 | 2021-03-23 | 百富计算机技术（深圳）有限公司 | Startup and shutdown circuit and POS machine |
| CN212572501U (en) * | 2020-06-11 | 2021-02-19 | 武汉兴通力电源技术有限公司 | Simple and easy adjustable output sequential control circuit |
| CN112039028B (en) * | 2020-08-11 | 2022-10-21 | 北京卫星制造厂有限公司 | Remote control instruction and bus under-voltage protection circuit with strong anti-jamming capability |
| CN111865061A (en) * | 2020-08-23 | 2020-10-30 | 贵阳航空电机有限公司 | Power-on and power-off management circuit of aviation motor controller |
| CN114237092B (en) * | 2021-11-18 | 2024-08-30 | 北京卫星制造厂有限公司 | Level signal type on-off control circuit |
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2021
- 2021-11-18 CN CN202111368734.1A patent/CN114237092B/en active Active
-
2022
- 2022-08-29 WO PCT/CN2022/115611 patent/WO2023087840A1/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809931A (en) * | 2011-05-30 | 2012-12-05 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit for power supply |
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| Publication number | Publication date |
|---|---|
| CN114237092A (en) | 2022-03-25 |
| WO2023087840A1 (en) | 2023-05-25 |
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