CN216721639U - Hot plug driving power supply for intelligent lamp pole and hot plug driving circuit thereof - Google Patents
Hot plug driving power supply for intelligent lamp pole and hot plug driving circuit thereof Download PDFInfo
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- CN216721639U CN216721639U CN202122970048.3U CN202122970048U CN216721639U CN 216721639 U CN216721639 U CN 216721639U CN 202122970048 U CN202122970048 U CN 202122970048U CN 216721639 U CN216721639 U CN 216721639U
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Abstract
The utility model discloses a hot plug driving power supply for a smart lamp pole and a hot plug driving circuit thereof, wherein the hot plug driving circuit is connected between a power supply and a load to realize hot plug of the power supply and the load, and comprises: the sampling amplification unit is used for detecting a current signal of a load and amplifying the current signal; the comparison unit is connected with the sampling amplification unit, receives the detection signal output by the sampling amplification unit and compares the detection signal; the conversion unit is connected with the comparison unit, receives the first control signal output by the comparison unit and converts the first control signal into a second control signal; and the switch unit is connected with the conversion unit and further controls the connection on-off between the power supply and the load based on the second control signal. The utility model can realize hot plug function, with high reliability, simple circuit structure and stable performance.
Description
Technical Field
The utility model relates to the technical field of lighting, in particular to a hot plug driving power supply for an intelligent lamp pole and a hot plug driving circuit thereof.
Background
In wisdom lamp pole illumination field, because drive power supply and lamps and lanterns are independent separately, if the lamp pearl in the lamps and lanterns damages or lamps and lanterns are not bright, can not directly break off drive power supply usually, because in the use occasion, the wisdom lamp pole most shares same alternating current power supply port, consequently can only change lamps and lanterns under the electrified condition. However, at the moment of switching on and switching off the lamp, a large surge impact current is generated on the connecting line, so that the impact on the lamp is very large, and the lamp is very easy to damage.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an intelligent lamp pole hot plug driving power supply and a hot plug driving circuit thereof aiming at least one defect in the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the hot plug driving circuit is connected between a power supply and a load, so that the power supply and the load can realize hot plug, and comprises the following components:
the sampling amplification unit is used for detecting a current signal of a load and amplifying the current signal;
the comparison unit is connected with the sampling amplification unit, receives the detection signal output by the sampling amplification unit and compares the detection signal;
the conversion unit is connected with the comparison unit, receives the first control signal output by the comparison unit and converts the first control signal into a second control signal;
and the switch unit is connected with the conversion unit and further controls the connection on-off between the power supply and the load based on the second control signal.
Preferably, in the hot swap driving circuit of the present invention, the sampling amplifying unit includes an eleventh operational amplifier U11, a first resistor R1, a thirty-first resistor R31, a thirty-second resistor R32, a twenty-first resistor R21, and a twenty-second resistor R22;
the non-inverting input end of the eleventh operational amplifier U11 is connected to the ground through the first resistor R1 in one path, and connected to the ground through the thirty-first resistor R31 and the thirty-second resistor R32 in the other path; a first end of the thirty-second resistor R32 is a detection end and is used for connecting a negative electrode of a load, the twenty-first resistor R21 is connected between an inverting input end of the eleventh operational amplifier U11 and ground, the twenty-second resistor R22 is connected between an inverting input end and an output end of the eleventh operational amplifier U11, and an output end of the eleventh operational amplifier U11 is connected with the comparison unit.
Preferably, in the hot swap driving circuit of the present invention, the sampling amplifying unit further includes a thirty-third resistor R33; the thirty-third resistor R33 is connected in parallel across the thirty-second resistor R32.
Preferably, in the hot swap driving circuit of the present invention, the comparing unit comprises a forty-first resistor R41, a forty-second resistor R42, and a twelfth operational amplifier U12;
the input end of the switch unit is connected to the inverting input end of the twelfth operational amplifier U12 through the forty-first resistor R41, the inverting input end of the twelfth operational amplifier U12 is further connected to the ground through the forty-second resistor R42, the non-inverting input end of the twelfth operational amplifier U12 is connected to the output end of the eleventh operational amplifier U11, and the output end of the twelfth operational amplifier U12 is connected to the conversion unit.
Preferably, in the hot plug driving circuit of the present invention, the switching unit includes a fifty-third resistor R53, a fourth switch tube Q4, a fifty-first resistor R51, a fifty-second resistor R52, a third switch tube Q3, a sixty-first resistor R61, a sixty-second resistor R62, a second switch tube Q2, a seventy-first resistor R71, and a seventy-second resistor R72;
the fifty-third resistor R53 is connected between the input terminal of the switch unit and the control terminal of the fourth switch tube Q4, the control terminal of the fourth switch tube Q4 is connected to the output terminal of the twelfth operational amplifier U12, the fifty-first resistor R51 is connected between the input terminal of the switch unit and the input terminal of the fourth switch tube Q4, the input terminal of the fourth switch tube Q4 is connected to the control terminal of the third switch tube Q3 and is also connected to ground through the fifty-second resistor R52, the output terminal of the fourth switch tube Q4 is grounded, the sixty-first resistor R61 is connected between the input terminal of the switch unit and the input terminal of the third switch tube Q3, the input terminal of the third switch tube Q3 is also connected to the control terminal of the second switch tube Q2 through the sixty-second resistor R62, and the output terminal of the third switch tube Q3 is grounded, the input end of the second switch tube Q2 is connected to the input end of the switch unit, the output end of the second switch tube Q2 is connected to the ground through the seventy-first resistor R71, and the output end of the second switch tube Q2 is further connected to the control end of the switch unit through the seventy-second resistor R72.
Preferably, in the hot swap driving circuit of the present invention, the fourth switching tube Q4 is an N-type MOS transistor, the third switching tube Q3 is an NPN transistor, and the second switching tube Q2 is a PNP transistor.
Preferably, in the hot swap driving circuit of the present invention, the switch unit includes a first switch tube Q1;
the control end of the first switch tube Q1 is the control end of the switch unit and is connected to the second end of the seventy-second resistor R72, the input end of the first switch tube Q1 is the input end of the switch unit, and the output end of the first switch tube Q1 is the output end of the switch unit.
Preferably, in the hot plug driving circuit of the present invention, the first switch Q1 is an N-type MOS transistor.
The utility model also constructs a hot plug driving power supply of the intelligent lamp pole, which comprises a power supply and any one of the hot plug driving circuits; the power supply is connected with the hot plug driving circuit.
The implementation of the utility model has the following beneficial effects: at the moment of hot plugging, the current signal of the load is detected by the sampling amplifying unit and the detection signal is output, and the detection signal is compared, converted and amplified by the comparing unit and the converting unit, so that the switch unit is disconnected from the power supply and the load, and the load is prevented from being damaged due to impact current generated at the moment of hot plugging.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a hot swap driving circuit according to the present invention;
fig. 2 is a circuit diagram of a hot plug driving circuit in the novel experimental model.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the hot swap driving circuit of the present invention, connected between a power source and a load, for enabling the power source and the load to realize hot swap, includes:
a sampling amplifying unit 100 for detecting a current signal of a load and amplifying the current signal;
a comparison unit 200 connected to the sampling and amplifying unit 100, for receiving the detection signal outputted from the sampling and amplifying unit 100 and comparing the detection signal;
a conversion unit 300 connected to the comparison unit 200, for receiving the first control signal outputted by the comparison unit 200 and converting the first control signal into a second control signal;
and a switch unit 400 connected to the conversion unit 300, for controlling the connection between the power supply and the load based on the second control signal.
Specifically, at the moment when the power supply is connected to the load in a live manner, i.e., at the moment of hot plugging, a large impact current generated may damage the load. If the hot plug driving circuit is connected between a power supply and a load, the utility model uses the sampling amplification unit 100 to detect the magnitude of the input current signal of the load, converts the input current signal into a voltage signal and amplifies the voltage signal to obtain a detection signal; the comparing unit 200 compares the acquired detection signal with a reference voltage inside the detecting unit, and when the detection signal is greater than the reference voltage, a first control signal output by the comparing unit is output to the converting unit 300 as a turn-off signal; the conversion unit 300 converts and amplifies the first control signal to obtain a second control signal; the second control signal causes the switching unit 400 to disconnect the power supply from the load, thereby preventing the load from being damaged by an impact current generated at the moment of power supply connection; after the hot plug transient state, the detection signal output by the sampling amplifying unit 100 is smaller than the internal reference voltage of the comparing unit 200, the first control signal at this time is input to the converting unit 300 as a conducting signal, and the converting unit controls the switching unit to conduct the connection between the power supply and the load.
Fig. 2 is a circuit diagram of a hot plug driving circuit in the novel experimental model.
Specifically, the sampling amplification unit 100 includes an eleventh resistor R11, an eleventh operational amplifier U11, a first resistor R1, a thirty-first resistor R31, a thirty-second resistor R32, a twenty-first resistor R21, and a twenty-second resistor R22; an input end of the switching unit 400 is connected to a power supply input end of an eleventh operational amplifier U11 through an eleventh resistor R11, one path of a non-inverting input end of the eleventh operational amplifier U11 is connected to the ground through a first resistor R1, and the other path of the non-inverting input end of the eleventh operational amplifier U11 is connected to the ground through a thirty-first resistor R31 and a thirty-second resistor R32; the first end of the thirty-second resistor R32 is a detection end and is used for connecting the negative pole of the load, the twenty-first resistor R21 is connected between the inverting input end of the eleventh operational amplifier U11 and the ground, the twenty-second resistor R22 is connected between the inverting input end and the output end of the eleventh operational amplifier U11, and the output end of the eleventh operational amplifier U11 is connected with the comparison unit 200.
Optionally, the sampling amplifying unit 100 further includes a thirty-third resistor R33; the thirty-third resistor R33 is connected in parallel across the thirty-second resistor R32. The thirty-third resistor R33 functions as: the thirty second resistor R32 is shunted to prevent the surge current from being too large to damage the thirty second resistor R32.
The comparing unit 200 comprises a forty-first resistor R41, a forty-second resistor R42 and a twelfth operational amplifier U12; specifically, the input terminal of the switching unit 400 is connected to the inverting input terminal of the twelfth operational amplifier U12 through a forty-first resistor R41, the inverting input terminal of the twelfth operational amplifier U12 is further connected to the ground through a forty-second resistor R42, the non-inverting input terminal of the twelfth operational amplifier U12 is connected to the output terminal of the eleventh operational amplifier U11, and the output terminal of the twelfth operational amplifier U12 is connected to the converting unit 300.
The conversion unit 300 comprises a fifty-third resistor R53, a fourth switch tube Q4, a fifty-first resistor R51, a fifty-second resistor R52, a third switch tube Q3, a sixty-first resistor R61, a sixty-second resistor R62, a second switch tube Q2, a seventy-first resistor R71 and a seventy-second resistor R72;
the fourth switching tube Q4 may be an N-type MOS tube, and a gate, a drain, and a source of the N-type MOS tube correspond to the control end, the input end, and the output end of the fourth switching tube Q4, respectively; the third switching tube Q3 may be an NPN transistor, and a base, a collector, and an emitter of the NPN transistor correspond to the control end, the input end, and the output end of the third switching tube Q3, respectively; the second switch tube Q2 may be a PNP triode, and a base, an emitter, and a collector of the PNP triode correspond to a control end, an input end, and an output end of the second switch tube Q2, respectively;
a fifty-third resistor R53 is connected between the input terminal of the switching unit 400 and the control terminal of the fourth switching tube Q4, the control terminal of the fourth switching tube Q4 is connected to the output terminal of the twelfth operational amplifier U12, a fifty-first resistor R51 is connected between the input terminal of the switching unit 400 and the input terminal of the fourth switching tube Q4, the input terminal of the fourth switching tube Q4 is connected to the control terminal of the third switching tube Q3 and is further connected to ground via a fifty-second resistor R52, the output terminal of the fourth switching tube Q4 is grounded, a sixty-first resistor R61 is connected between the input terminal of the switching unit 400 and the input terminal of the third switching tube Q3, the input terminal of the third switching tube Q3 is further connected to the control terminal of the second switching tube Q2 via a sixty-second resistor R62, the output terminal of the third switching tube Q3 is grounded, the input terminal of the second switching tube Q2 is connected to the input terminal of the switching unit 400, the output terminal of the second switching tube Q2 is connected to seventh ground via a tenth-first resistor R71, the output terminal of the second switch tube Q2 is further connected to the control terminal of the switch unit 400 via a seventy-second resistor R72.
The switching unit 400 includes a first switching tube Q1, and the first switching tube Q1 may be an N-type MOS tube; the control terminal of the first switch transistor Q1 is the control terminal of the switch unit 400 and is connected to the second terminal of the seventy-second resistor R72, the input terminal of the first switch transistor Q1 is the input terminal of the switch unit 400, and the output terminal of the first switch transistor Q1 is the output terminal of the switch unit 400.
The principle of the circuit diagram shown in fig. 2 is explained below: the first resistor R1 is a pull-down resistor of the non-inverting input terminal of the eleventh operational amplifier U11, the thirty-second resistor R32 is connected in series between the load and the ground, the first end of the thirty-second resistor R32 is a detection end for converting a current signal flowing through the load into a voltage signal, and the voltage signal is input to the non-inverting input terminal of the eleventh operational amplifier U11 through the thirty-first resistor R31, the voltage signal is processed by the eleventh operational amplifier U11, the twenty-first resistor R21 and the twenty-second resistor R22, the eleventh operational amplifier U11 outputs the amplified detection signal to the non-inverting input terminal of the twelfth operational amplifier U12, and the input voltage of the power supply is divided by the forty-first resistor R41 and the forty-second resistor R42 and then input to the inverting input terminal of the twelfth operational amplifier U12 as a reference voltage, when an instant occurs, the detection signal is greater than the reference voltage, the first control signal output by the twelfth operational amplifier U12 is at a high level, the fifty-third resistor R53 is a pull-up resistor at the control end of the fourth switching tube Q4, and the control end of the fourth switching tube Q4 is at a high level, so the fourth switching tube Q4 is turned on, and the control end of the third switching tube Q3 is at a low level, the third switching tube Q3 is turned off, the sixty-first resistor R61 and the sixty-second resistor R62 are pull-up resistors at the control end of the second switching tube Q2, and the control end of the second switching tube Q2 is at a high level, the second switching tube Q2 is turned off, the seventy-first resistor R71 and the seventy-second resistor R72 are pull-down resistors at the control end of the first switching tube Q1, and the control end of the first switching tube Q1 is at a low level, and the first switching tube Q1 is turned off, and at this time, the connection between the power supply and the load is broken. After the hot plug transient state, the detection signal is smaller than the reference voltage, the first control signal output by the twelfth operational amplifier U12 is at a low level, so that the control terminal of the fourth switching tube Q4 is at a low level, the fourth switching tube Q4 is turned off, the fifty-first resistor R51 is a pull-up resistor of the control terminal of the third switching tube Q3, so that the control terminal of the third switching tube Q3 is at a high level, the third switching tube Q3 is turned on, so that the control terminal of the second switching tube Q2 is at a low level, the second switching tube Q2 is turned on, so that the control terminal of the first switching tube Q1 is at a high level, and the first switching tube Q1 is turned on, thereby turning on the connection between the power supply and the load.
The experiment novel structure also constructs a smart lamp pole hot plug driving power supply which comprises a power supply and any one hot plug driving circuit; the power supply is connected with the hot plug driving circuit. The power supply may be a switching power supply, a battery or a linear power supply, etc.
The implementation of the utility model has the following beneficial effects: at the moment of hot plugging, the current signal of the load is detected by the sampling amplifying unit and the detection signal is output, and the detection signal is compared, converted and amplified by the comparing unit and the converting unit, so that the switch unit is disconnected from the power supply and the load, and the load is prevented from being damaged due to impact current generated at the moment of hot plugging.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (9)
1. A hot plug drive circuit for hot plug between a power supply and a load, comprising:
a sampling amplifying unit (100) for detecting a current signal of a load and amplifying the current signal;
a comparison unit (200) connected to the sampling and amplification unit (100), receiving the detection signal outputted from the sampling and amplification unit (100), and comparing the detection signal;
the conversion unit (300) is connected with the comparison unit (200), receives the first control signal output by the comparison unit (200), and converts the first control signal into a second control signal;
and the switch unit (400) is connected with the conversion unit (300) and further controls the connection on-off between the power supply and the load based on the second control signal.
2. A hot plug driver circuit according to claim 1, wherein the sampling amplifying unit (100) comprises an eleventh operational amplifier U11, a first resistor R1, a thirty-first resistor R31, a thirty-second resistor R32, a twenty-first resistor R21 and a twenty-second resistor R22;
the non-inverting input end of the eleventh operational amplifier U11 is connected to the ground through the first resistor R1 in one path, and connected to the ground through the thirty-first resistor R31 and the thirty-second resistor R32 in the other path; the first end of the thirty-second resistor R32 is a detection end and is used for being connected with the negative pole of a load, the twenty-first resistor R21 is connected between the inverting input end of the eleventh operational amplifier U11 and the ground, the twenty-second resistor R22 is connected between the inverting input end and the output end of the eleventh operational amplifier U11, and the output end of the eleventh operational amplifier U11 is connected with the comparison unit (200).
3. A hot plug driver circuit according to claim 2, wherein the sample amplifying unit (100) further comprises a thirty-third resistor R33; the thirty-third resistor R33 is connected in parallel across the thirty-second resistor R32.
4. The hot plug driver circuit according to claim 3, wherein the comparison unit (200) comprises a forty-first resistor R41, a forty-second resistor R42 and a twelfth operational amplifier U12;
the input end of the switch unit (400) is connected to the inverting input end of the twelfth operational amplifier U12 through the forty-first resistor R41, the inverting input end of the twelfth operational amplifier U12 is further connected to the ground through the forty-second resistor R42, the non-inverting input end of the twelfth operational amplifier U12 is connected to the output end of the eleventh operational amplifier U11, and the output end of the twelfth operational amplifier U12 is connected to the conversion unit (300).
5. The hot plug driving circuit according to claim 4, wherein the switching unit (300) comprises a fifty-third resistor R53, a fourth switch tube Q4, a fifty-first resistor R51, a fifty-second resistor R52, a third switch tube Q3, a sixty-first resistor R61, a sixty-second resistor R62, a second switch tube Q2, a seventy-first resistor R71 and a seventy-second resistor R72;
the fifty-third resistor R53 is connected between the input terminal of the switching unit (400) and the control terminal of the fourth switching tube Q4, the control terminal of the fourth switching tube Q4 is connected to the output terminal of the twelfth operational amplifier U12, the fifty-first resistor R51 is connected between the input terminal of the switching unit (400) and the input terminal of the fourth switching tube Q4, the input terminal of the fourth switching tube Q4 is connected to the control terminal of the third switching tube Q3 and also to ground via the fifty-second resistor R52, the output terminal of the fourth switching tube Q4 is grounded, the sixty-first resistor R61 is connected between the input terminal of the switching unit (400) and the input terminal of the third switching tube Q3, the input terminal of the third switching tube Q3 is also connected to the control terminal of the second switching tube Q2 via the sixty-second resistor R62, and the output terminal of the third switching tube Q3 is grounded, the input end of the second switch tube Q2 is connected to the input end of the switch unit (400), the output end of the second switch tube Q2 is connected to the ground through the seventy-first resistor R71, and the output end of the second switch tube Q2 is further connected to the control end of the switch unit (400) through the seventy-second resistor R72.
6. The hot plug driving circuit according to claim 5, wherein the fourth switching transistor Q4 is an N-type MOS transistor, the third switching transistor Q3 is an NPN transistor, and the second switching transistor Q2 is a PNP transistor.
7. A hot plug driver circuit according to any of claims 5 or 6, wherein the switching unit (400) comprises a first switching tube Q1;
the control end of the first switch tube Q1 is the control end of the switch unit (400) and is connected with the second end of the seventy-second resistor R72, the input end of the first switch tube Q1 is the input end of the switch unit (400), and the output end of the first switch tube Q1 is the output end of the switch unit (400).
8. The hot plug driver circuit as claimed in claim 7, wherein the first switch transistor Q1 is an N-type MOS transistor.
9. A hot plug driving power supply for intelligent lamp post, comprising a power supply and a hot plug driving circuit according to any one of claims 1 to 8; the power supply is connected with the hot plug driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122970048.3U CN216721639U (en) | 2021-11-30 | 2021-11-30 | Hot plug driving power supply for intelligent lamp pole and hot plug driving circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122970048.3U CN216721639U (en) | 2021-11-30 | 2021-11-30 | Hot plug driving power supply for intelligent lamp pole and hot plug driving circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN216721639U true CN216721639U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122970048.3U Active CN216721639U (en) | 2021-11-30 | 2021-11-30 | Hot plug driving power supply for intelligent lamp pole and hot plug driving circuit thereof |
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| Country | Link |
|---|---|
| CN (1) | CN216721639U (en) |
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2021
- 2021-11-30 CN CN202122970048.3U patent/CN216721639U/en active Active
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