CN216721167U

CN216721167U - Hot plug circuit and electronic equipment

Info

Publication number: CN216721167U
Application number: CN202122688993.4U
Authority: CN
Inventors: 黄毅; 周向军; 童鹍
Original assignee: Aputure Imaging Industries Co Ltd
Current assignee: Shenzhen Aitushi Innovation Technology Co ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-06-10
Anticipated expiration: 2031-11-04

Abstract

The application provides a hot plug circuit and electronic equipment has related to power technical field, has solved the not high problem of present hot plug circuit integrated level, includes: a power input terminal and a power output terminal; the starting module is electrically connected with the power input end and the power output end; a switch module including a first switch unit and a second switch unit; the detection module is connected with start module, switch module and power output end electricity, and this application adopts the first switch unit by the constitution of PMOS pipe, need not extra push-pull circuit output high level and guarantees that first switch unit switches on, also need not extra bias power and gives the power supply of push-pull circuit for the circuit is simpler and easier, and the integrated level is higher, and is safer.

Description

Hot plug circuit and electronic equipment

Technical Field

The application relates to the technical field of power supplies, in particular to a hot plug circuit and electronic equipment.

Background

Existing electrical devices, control boxes, etc. have an input interface, such as a power input interface or an electrical connection interface of a male plug and a female plug, which is directly electrically connected to a driving board through the input interface.

Some equipment at present avoid the drive plate when carrying out the hot plug and insert, the very big surge current of drive plate input appearance leads to the circuit to damage, can set up a hot plug circuit at input interface, with the surge current of control input interface department, with the protection drive plate, but current partial hot plug circuit need additionally set up push-pull circuit and bias power supply in the use, in order to guarantee the normal use of hot plug circuit, the design that leads to hot plug circuit needs to carry on extra integrated circuit, circuit integrated level is not high.

SUMMERY OF THE UTILITY MODEL

The application provides a can guarantee that first switch element switches on without extra push-pull circuit output high level, also need not extra bias power and give the power supply of push-pull circuit for the circuit is simpler and easy, hot plug circuit and electronic equipment that the integrated level is higher.

In one aspect, the present application provides a hot swap circuit, including:

a power input terminal and a power output terminal;

the starting module is electrically connected with the power input end and the power output end and used for outputting a constant current signal with a preset current value and charging the power output end;

a switch module including a second switch unit and a second conversion unit;

the second switch unit is electrically connected with the power input end and the power output end and is used for controlling the electrical connection on-off of the power input end and the power output end;

the second conversion unit is electrically connected with the second switch unit and the detection module, and is used for receiving a first control signal input by the detection module, outputting a third control signal to the second switch unit according to the first control signal, and controlling the on-off of the second switch unit;

and the detection module is electrically connected with the starting module, the switch module and the power output end and used for outputting a first control signal according to the constant current signal and controlling the on-off of the switch module according to the voltage value of the first control signal and the preset voltage value range of the first control signal.

In a possible implementation manner of the present application, the second switch unit includes one third switch tube and/or a plurality of third switch tubes electrically connected in parallel, and the third switch tube is a P-channel mosfet.

In a possible implementation manner of the present application, the second conversion unit includes a first triode, a first resistor, a second resistor, a first voltage regulator tube, and a first capacitor, wherein a collector of the first triode is electrically connected to the power input end through the first resistor and the second resistor, an emitter of the first triode is grounded, a base of the first triode is electrically connected to the output end of the detection module, and a gate and an electrical connection of the third switch tube in the second switch unit are electrically connected to an electrical connection point of the collector of the first triode and the second resistor. One end of the first capacitor is electrically connected with the power input end, the other end of the first capacitor is electrically connected with the electric connection point of the collector of the first triode and the second resistor, the negative electrode of the first voltage-regulator tube is electrically connected with the power input end, and the positive electrode of the first voltage-regulator tube is electrically connected with the electric connection point of the collector of the first triode and the second resistor.

In a possible implementation manner of the present application, the starting module includes a first switch tube, a first voltage dividing portion, a second voltage dividing portion and a voltage regulator tube, the first end of the first switch tube and the first end of the second voltage dividing portion are electrically connected to the power input end, the second end of the second voltage dividing portion is electrically connected to the first end of the voltage regulator tube, the second end of the first switch tube is electrically connected to the point of electrical connection where the second end of the second voltage dividing portion is electrically connected to the first end of the voltage regulator tube, the third end of the first switch tube is electrically connected to the first end of the first voltage dividing portion, and the second end of the first voltage dividing portion is electrically connected to the second end of the voltage regulator tube.

In one possible implementation manner of the present application, the detection module includes:

and the detection unit is electrically connected with the starting module and the switch module and is used for outputting a first control signal and a third control signal according to the constant current signal, and the first control signal is used for controlling the on-off of the switch module.

In a possible implementation manner of the present application, the detection unit includes a first voltage-dividing resistor, a second voltage-dividing resistor, and a third voltage-dividing resistor, which are electrically connected in sequence, where the other end of the first voltage-dividing resistor is electrically connected to an electrical connection point between the starting module and the power output terminal, and a base of the first triode is electrically connected to an electrical connection node between the second voltage-dividing resistor and the third voltage-dividing resistor.

In a possible implementation manner of the present application, the detection module further includes:

the anti-jitter delay unit is electrically connected with the detection unit and used for detecting the voltage value of the third control signal and controlling the on-off of the detection unit according to the voltage value of the third control signal and a preset delay starting voltage value;

the anti-jitter delay unit includes:

the control part is used for controlling the on-off of the detection unit according to the voltage value of the third control signal and a preset delay starting voltage value;

and the time delay part is used for controlling the detection unit to start in a time delay manner.

In a possible implementation manner of the present application, the delay portion includes a second capacitor and a first diode, the control portion includes a third capacitor, a sixth resistor, a third resistor, a fourth resistor, a fifth resistor, a second triode and a third triode, one end of the third capacitor is electrically connected to the detection module, the other end of the third capacitor is grounded, the positive electrode of the first diode is electrically connected to the third capacitor, the negative electrode of the first diode is electrically connected to the emitter of the second triode, one end of the second capacitor is electrically connected to the point of electrical connection between the negative electrode of the first diode and the emitter of the second triode, the other end of the second capacitor is grounded, the collector of the second triode is electrically connected to one end of the fourth resistor, the base of the second triode is electrically connected to the positive electrode of the first diode through the sixth resistor, the other end of the fourth resistor is grounded through the fifth resistor, the base electrode of the third triode is electrically connected to the electric connection point of the fourth resistor and the fifth resistor, the collector electrode of the third triode is electrically connected with the anode of the first diode through the third resistor, and the emitter electrode of the third triode is grounded.

In one possible implementation manner of the present application, the power input end and the power output end are all electrically connected with a surge protection module, and the surge protection module is used for suppressing input to the power input end and the surge voltage of the power output end.

In another aspect, the present application further provides an electronic device, where the electronic device includes the hot plug circuit.

The switch module comprises a first switch unit, the first switch unit adopts a third switch tube or a plurality of third switch tubes electrically connected in parallel, and the third switch tube adopts a P-channel MOS tube. When the characteristic according to the PMOS pipe, need not extra push-pull circuit output high level and guarantee that first switch element switches on, also need not extra bias power supply and give the power supply of push-pull circuit for the circuit is simpler and easier, and the integrated level is higher, and is safer.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of a hot plug circuit provided in the embodiments of the present application;

fig. 2 is a schematic structural diagram of an embodiment of a bias power supply module provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of an example structure of a hot plug circuit provided in the example of the present application;

fig. 4 is a schematic structural diagram of an embodiment of the apparatus provided in the embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiments of the present application provide a hot plug circuit and an electronic device, which are described in detail below.

As shown in fig. 1, which is a schematic structural diagram of an embodiment of a hot plug circuit in an embodiment of the present application, the hot plug circuit includes:

in one aspect, the present application provides a hot swap circuit, including:

the power supply comprises a power supply input end 100 and a power supply output end 200, wherein the power supply input end 100 is electrically connected with power supply equipment for providing power supply signals, the power supply output end 200 is electrically connected with a corresponding drive board or drive circuit input end which needs to be connected with a power supply, the power supply output end 200 comprises one or more load capacitors C2 which are connected in parallel, the load capacitors C2 can also be arranged in a rear-stage circuit (such as a drive board, a drive circuit or other circuits), and the power supply of the drive board or the drive circuit is realized through the charging and discharging functions of the load capacitors C2.

The starting module 300 is electrically connected to the power input terminal 100 and the power output terminal 200, and is configured to output a constant current signal with a preset current value to charge the power output terminal 200, specifically, after the power output terminal 200 is connected to a power supply, the starting module 300 outputs the constant current signal with the preset current value to charge the load capacitor C2.

The switch module 400 is electrically connected to the power input terminal 100, the power output terminal 200 and the start module 300, and is configured to control on/off of electrical connection between the power input terminal 100 and the power output terminal 200.

The detection module 500 is electrically connected to the starting module 300, the switch module 400 and the power output end 200, and is configured to output a first control signal according to the constant current signal, and control on/off of the switch module 400 according to a voltage value of the first control signal and a preset voltage value range of the first control signal.

After a power input end 100 of the present application is connected with a power signal input from the outside, a start module 300 outputs a preset constant current signal with a current value to a power output end 200 according to the power signal, and charges the power output end 200, and at the same time, a detection module 500 outputs a first control signal according to the constant current signal, when a voltage value of the first control signal reaches a preset voltage value range of the first control signal, the detection module 500 controls a switch module 400 to be turned on, otherwise the switch module 400 is controlled to be turned off, and when the switch module 400 is turned on, the input power signal is output through the power output end 200, therefore, when a surge signal is input at the power input end 100, a voltage value of the first control signal output by the detection module 500 does not meet the preset voltage value range of the first control signal, and then the switch module 400 is controlled to be turned off, thereby cutting off the power signal input to the power output end 200, the probability that surge current leads to circuit damage is reduced, the phenomenon of striking sparks easily appears in the power source that reduces hot plug, leads to appearing burning black, ageing fast problem, has protected power supply unit.

In one embodiment of the present application, the surge protection module 700 is electrically connected to each of the power input terminal 100 and the power output terminal 200, and the surge protection module 700 is used for suppressing a surge voltage input to the power input terminal 100 and the power output terminal 200.

As shown in fig. 1, the surge protection module 700 includes a Transient diode D2 (TVS) and a Transient diode D3, the Transient diode D3 is electrically connected to the power input terminal 100, the other end of the Transient diode D3 is grounded, the Transient diode D3 is electrically connected to the power output terminal 200, and the other end of the Transient diode D3 is grounded. When two ends of the TVS tube are subjected to instantaneous high-energy impact, the TVS tube can reduce the impedance thereof suddenly at a very high speed, and simultaneously absorb a large current to clamp the voltage between the two ends thereof at a predetermined value, thereby being capable of being used for suppressing the surge voltage input to the power input end 100 and the power output end 200 and ensuring that the surge voltage of elements in the hot plug circuit is impacted and damaged.

In an embodiment of the present application, the starting module 300 includes a first switch tube 301, a first voltage divider 302, a second voltage divider 303, and a voltage regulator tube 304, a first end of the first switch tube 301 and a first end of the second voltage divider 303 are both electrically connected to the power input terminal 100, a second end of the second voltage divider 303 is electrically connected to a first end of the voltage regulator tube 304, a second end of the first switch tube 301 is electrically connected to an electrical connection point where a second end of the second voltage divider 303 is electrically connected to a first end of the voltage regulator tube 304, a third end of the first switch tube 301 is electrically connected to a first end of the first voltage divider 302, and a second end of the first voltage divider 302 is electrically connected to a second end of the voltage regulator tube 304.

Specifically, the first switch tube 301 includes a first switch tube Q1, and the first switch tube Q1 may employ an N-channel mosfet, that is, an N-channel MOS tube, or a P-channel MOS tube. The resistor R1 used in the first voltage divider 302 may be a resistor R1 and a resistor R2 connected in parallel, or may be more resistors connected in parallel according to specific needs, which is not limited herein. The second voltage divider 303 uses a voltage divider resistor R3, and the voltage regulator 304 uses a voltage regulator D1. As shown in fig. 1, the drain of the first switch tube Q1 and one end of the voltage-dividing resistor R3 are electrically connected to the power input terminal 100, the other end of the voltage-dividing resistor R3 is electrically connected to one end of the voltage-regulator tube D1, the source of the first switch tube Q1 is electrically connected to one end of the resistor R2, the resistor R1 and the resistor R2 are connected in parallel, the other end of the resistor R2 and the other end of the voltage-regulator tube D1 are electrically connected to the power output terminal 200, and the gate of the first switch tube Q1 is electrically connected to the point of electrical connection between the voltage-dividing resistor R3 and the voltage-regulator tube D1.

In the application process, in the charging process, a fixed voltage point is formed between the voltage dividing resistor R3 and the voltage regulator tube D1, so that the voltage values at the two ends of the voltage regulator tube D1 are fixed, that is, the voltage values at the two ends of the first switch tube Q1 and the two ends of the resistor R1 and the resistor R2 which are connected in parallel are the same as the voltage values at the two ends of the voltage regulator tube D1, and since the voltage values at the two ends of the resistor R1 and the resistor R2 which are connected in parallel are constant, the currents in the resistor R1 and the resistor R2 are also constant, a constant current circuit is formed, and after receiving a power supply signal input by the power supply input end 100, the starting module 300 outputs a constant current signal with a preset current value to the power supply output end 200, so as to realize constant current starting.

In this embodiment, the start module 300 further includes a decoupling capacitor C1, the voltage regulator tube D1 is electrically connected in parallel with the decoupling capacitor C1, as shown in fig. 2, one end of the decoupling capacitor C1 and the gate of the first switch tube Q1 are electrically connected to the electrical connection point of the voltage dividing resistor R3 and the voltage regulator tube D1, the other end of the decoupling capacitor C1 is electrically connected to the other end of the voltage regulator tube D1, and the decoupling capacitor C1 prevents the first switch tube Q1 from oscillating, so as to enhance the stability of the start module 300.

In this embodiment, the preset current value of the constant current signal output by the start module 300 may be adjusted according to a specific actual situation, where the preset current value of the constant current signal is not specifically limited, and for example, the preset current value of the constant current signal may be adjusted by setting a parallel resistance value parameter of the resistor R1 and the resistor R2 or by selecting the voltage regulator tube D1 with different voltage regulation value parameters, for example, increasing or decreasing the resistance values of the resistor R1 and the resistor R2, and selecting the diode D1 with a larger voltage regulation value or a smaller voltage regulation value.

In an embodiment of the present application, the switch module 400 is connected in parallel with the starting module 300, and specifically, the switch module 400 includes:

the first switch unit 401 is electrically connected with the power input end 100, the power output end 200 and the starting module 300, and is used for controlling the electrical connection and disconnection of the power input end 100 and the power output end 200;

and the first conversion unit 402, the first conversion unit 402 is electrically connected to the first switch unit 401 and the detection module 500, and is configured to receive a first control signal input by the detection module 500, output a second control signal to the first switch unit 401 according to the first control signal, and control on/off of the first switch unit 401.

In an embodiment of the present application, the first switch unit 401 includes one second switch tube or a plurality of second switch tubes electrically connected in parallel, as shown in fig. 1, the first switch unit 401 may be one second switch tube Q2, and may also be a plurality of second switch tubes electrically connected in parallel, that is, the second switch tube Q3, the second switch tube Q4, and the second switch tube Q6, in order to share the heating power with the second switch tube Q2.

The second switch tube comprises an N-channel metal oxide semiconductor field effect transistor and a P-channel metal oxide semiconductor field effect transistor. For example, the second switching tube Q2, the second switching tube Q3, the second switching tube Q4, and the second switching tube Q6 may all be N-channel MOS tubes, or may all be P-channel MOS tubes, which is not limited herein.

In this embodiment, as shown in fig. 1, the second switching transistor Q2, the second switching transistor Q3, the second switching transistor Q4 and the second switching transistor Q6 are all N-channel MOS transistors, wherein, the drain of the second switching tube Q2, the drain of the second switching tube Q3, the drain of the second switching tube Q4 and the drain of the second switching tube Q6 are electrically connected in parallel and then electrically connected to the power input terminal 100, and is connected in parallel to the connection point of the starting module 300 and the power input terminal 100, the source electrode of the second switching tube Q2, the source electrode of the second switching tube Q3, the source electrode of the second switching tube Q4 and the source electrode of the second switching tube Q6 are electrically connected to the power output terminal 200 after being connected in parallel, and is connected in parallel to the connection point of the starting module 300 and the power output end 200, and the gate of the second switching tube Q2, the gate of the second switching tube Q3, the gate of the second switching tube Q4 and the gate of the second switching tube Q6 are connected in parallel and electrically connected to the first converting unit 402.

The second switch tube Q2, the second switch tube Q3, the second switch tube Q4 and the second switch tube Q6 are used for controlling the on-off of the power input end 100 and the power output end 200, so that when surge voltage is input from the power input end 100, the second switch tube Q2, the second switch tube Q3, the second switch tube Q4 and the second switch tube Q6 are used for controlling the disconnection between the power input end 100 and the power output end 200, so that the surge voltage is inhibited from being output to the power output end 200, and other parts electrically connected with the power output end 200 are protected.

When the second switch tube is an N-channel mosfet, the corresponding first signal conversion unit 402 is specifically:

as shown in fig. 1, the first conversion unit 402 includes a resistor R5, a resistor R7, a resistor R9, a transistor Q7, and a transistor Q10, where the transistor Q7 may be a PNP-type transistor and may also be a P-channel MOS transistor, and the transistor Q10 may be an NPN-type transistor and may also be an N-channel MOS transistor, which is not limited herein.

In this embodiment, the transistor Q7 is a PNP transistor, the transistor Q10 is an NPN transistor, one end of the resistor R5 is electrically connected to one end of the resistor R9, the other end of the resistor R9 is electrically connected to a collector of the transistor Q10, an emitter of the transistor Q10 is grounded, a base of the transistor Q10 is electrically connected to the output terminal of the detection module 500, the other end of the resistor R5 is electrically connected to an emitter of the transistor Q7, a base of the transistor Q7 is electrically connected to an electrical connection point of the resistor R5 and the resistor R9, a collector of the transistor Q7 is electrically connected to one end of the resistor R7, and the other end of the resistor R7 is electrically connected to the first switch unit 401.

The base of the triode Q10 receives a first control signal input by the detection module 500, the triode Q10 is controlled to be conducted by the first control signal, the triode Q10 is conducted, the collector voltage of the triode Q10 is pulled down at the moment, due to the partial pressure effect of the resistor R5 and the resistor R9, the triode Q7 is conducted, and then a second control signal is output to the first switch unit 401, so that the conduction of the first switch unit 401 is controlled, when the base of the triode Q10 receives the conduction condition that the first control signal input by the detection module 500 does not satisfy the triode Q10, the corresponding triode Q7 and the first switch unit 401 are both turned off.

In order to enhance the driving signal of the first switch unit 401, a push-pull unit 403 may be added to the switch module 400, and the push-pull unit 403 controls the on/off of the first switch unit 401, and at the same time, the on speed or the off speed of each second switch tube in the first switch unit 401 may be increased.

Therefore, in one embodiment of the present application, when the second switch transistor is an N-channel mosfet, the switch module 400 includes:

and a push-pull unit 403 electrically connected between the first switching unit 401 and the first converting unit 402, for amplifying the second control signal output by the first converting unit 402.

Specifically, the push-pull unit 403 includes a transistor Q5, a transistor Q8, and a current-limiting resistor R6, in this application, the transistor Q5 is a PNP-type transistor, and the transistor Q8 is an NPN-type transistor, and in this embodiment, the push-pull unit 403 may also be another switching tube that can perform a switching function, such as an mos tube or a field effect tube, which is not specifically limited herein.

As shown in fig. 1, the transistor Q5 and the transistor Q8 are electrically connected back to back, that is, the base of the transistor Q5 is electrically connected to the base of the transistor Q8, the base of the transistor Q5 and the base of the transistor Q8 are electrically connected to a common parallel electrical connection point of the gate of the second switching tube Q2, the gate of the second switching tube Q3, the gate of the second switching tube Q4 and the gate of the second switching tube Q6, the emitter of the transistor Q5 is electrically connected to the emitter of the transistor Q8, the collector of the transistor Q5 is electrically connected to the emitter of the transistor Q7, and the collector of the transistor Q8 is electrically connected to the free end of the resistor R7.

One end of the current-limiting resistor R6 is electrically connected to the electrical connection point between the base of the transistor Q5 and the base of the transistor Q8, and the other end of the current-limiting resistor R6 is electrically connected to the electrical connection point between the collector of the transistor Q7 and the resistor R7.

The push-pull unit 403 is formed by the transistor Q5 and the transistor Q8 to amplify the second control signal output by the first conversion unit 402, so that the on/off speed of the switch unit can be increased.

In one embodiment of the present application, when the second switch tube is an N-channel mosfet, according to the characteristics of the N-channel MOS transistor, the push-pull unit 403 is required to output a high level to turn on the second switching transistor Q2, the second switching transistor Q3, the second switching transistor Q4, and the second switching transistor Q6 in the first switching unit 401, and the stability of the power voltage input from the power input terminal 100 is poor, which cannot satisfy the stable power supply of the push-pull unit 403 and the first converting unit 402, and thus the operation of the second switching transistor Q2, the second switching transistor Q3, the second switching transistor Q4, and the second switching transistor Q6 in the first switching unit 401 is unstable, when the second switching tube Q2, the second switching tube Q3, the second switching tube Q4, and the second switching tube Q6 in the first switching unit 401 may all be N-channel MOS tubes, the bias power supply module 600 needs to be added, the first conversion unit 402 and the push-pull unit 403 are powered by the bias power supply module 600.

Therefore, the hot swap circuit in this application further includes a bias power supply module 600, and the bias power supply module 600 is electrically connected to the switch module 400 for supplying power to the first conversion unit 402 and the push-pull unit 403.

As shown in fig. 2, the bias power supply module 600 includes a current-limiting protection unit 601, an anti-surge slow-start protection unit 602, a second push-pull unit 603, and a rectifying and filtering unit 604, which are electrically connected in sequence.

Specifically, the current limiting protection unit 601 includes a resistor R15 and a TVS tube D9, one end of the resistor R15 is electrically connected to the power output port of the power supply device, and the other end is grounded through the TVS tube D9. The current of the power supply input by the power supply device is limited by the resistor R15, and the input instantaneous high voltage is suppressed by the TVS tube D9, thereby protecting the components in the bias power supply module 600.

The bias power supply module 600 further includes a current limiting resistor R16, and two ends of the current limiting resistor R16 are electrically connected to the rectifying and filtering unit 604 and the output end of the bias power supply module 600, respectively.

The surge-prevention slow start protection unit 602 comprises a resistor R20, a resistor R18, a resistor R19, a resistor R21, a capacitor C14, a capacitor C15, a triode Q14 and a triode Q15.

The collector of the transistor Q14 is electrically connected to the point of electrical connection between the resistor R15 and the TVS tube D9 through the resistor R20, the emitter of the transistor Q14 is grounded, the base of the transistor Q14 is electrically connected to the collector of the transistor Q15 through the capacitor C14, and both ends of the resistor R18 are electrically connected between the collector and the base of the transistor Q14, respectively.

The collector of the transistor Q15 is electrically connected to the point of electrical connection between the resistor R15 and the TVS tube D9 through the resistor R21, the emitter of the transistor Q15 is grounded, the base of the transistor Q15 is electrically connected to the collector of the transistor Q14 through the capacitor C15, and both ends of the resistor R19 are electrically connected between the collector and the base of the transistor Q15, respectively.

In this embodiment, when the bias power supply module 600 is powered on, the two ends of the resistor R20 and the resistor R21 have a certain voltage value, the capacitor C15 is charged through the resistor R20, the capacitor C14 is charged through the resistor R21, after the power supply voltage accessed by the bias power supply module 600 drops, the capacitor C14 and the capacitor C15 start to discharge, when the capacitor C14 and the capacitor C15 discharge for a period of time, and the voltage across the resistor R18 reaches the on-state voltage of the transistor Q14 and the voltage across the resistor R19 reaches the on-state voltage of the transistor Q15, the transistor Q14 and the transistor Q15 are both turned on, thereby directing the voltages in the capacitor C14 and the capacitor C15 to be pulled down to ground, protecting the devices at the back end of the bias power module 600, if the bias power supply module 600 has a surge voltage with an instantaneous high voltage after being connected to a power supply, the surge voltage can be rapidly input to the ground in the above manner, so that the back-end circuit is protected.

The second push-pull unit 603 includes a transistor Q13, a transistor Q12, a current-limiting resistor R17, and a capacitor C12, wherein the transistor Q13 and the transistor Q12 are electrically connected back to back, a base of the transistor Q13 is electrically connected to a base of the transistor Q12, an emitter of the transistor Q13 is electrically connected to an emitter of the transistor Q12, a collector of the transistor Q13 is electrically connected to an emitter of the transistor Q7, one end of the current-limiting resistor R17 is electrically connected to an electrical connection point between the base of the transistor Q13 and the base of the transistor Q12, the other end of the current-limiting resistor R17 is electrically connected to an electrical connection point between the resistor R21 and the collector of the transistor Q15, one end of the capacitor C12 is electrically connected to an electrical connection point between the emitter of the transistor Q13 and the emitter of the transistor Q12, and one end of the capacitor C12 is electrically connected to a cathode of a diode D7 (see below). Through the complementary push-pull amplification effect of the triode Q13 and the triode Q12, the capacitor C12 plays a role in assisting push-pull amplification, the output power of the bias power supply module 600 is enhanced, and the instantaneous response speed of output current and the voltage output characteristic are improved. In this embodiment, the second push-pull unit 603 may also be another type of switching tube that can function as a switch, and is not limited herein.

The rectifying and filtering unit 604 comprises a diode D7, a diode D6, a capacitor C13, a capacitor C10, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9. As shown in fig. 2, one end of a capacitor C13 and one end of a capacitor C10 are electrically connected to an electrical connection point between the resistor R15 and the TVS tube D9, the other end of a capacitor C13 and the other end of a capacitor C10 are electrically connected to ground, the diode D7 and the diode D6 are sequentially connected in series, an anode of the diode D7 is electrically connected to a collector of the transistor Q12, a cathode of the diode D7 is electrically connected to an anode of the diode D6, one end of a capacitor C12 is electrically connected to an electrical connection point between a cathode of the diode D7 and an anode of the diode D6, one end of the capacitors C6, C7, C8, and C9 which are connected in parallel is electrically connected to a cathode of the diode D6, and the other end of the capacitors C6, C7, C8, and C9 which are connected in parallel is connected to ground.

In an embodiment of the present application, since the second switch tube may also adopt a P-channel mosfet, and when the second switch tube is a P-channel mosfet, according to the characteristics of the P-channel MOS tube, it is not necessary for the push-pull unit 403 to output a high level to ensure that the second switch unit 404 is turned on, and therefore, correspondingly, the difference between the P-channel MOS tube and the N-channel MOS tube is that the switch module 400 does not include the push-pull unit 403, nor includes a bias power supply circuit for supplying power to the push-pull unit 403 and the first conversion unit 402, so that the circuit is simpler, higher in integration level, and safer.

Therefore, in this embodiment, a second switch module 400 applicable to a hot swap circuit is proposed, the switch module 400 comprising:

the second switch unit 404 is electrically connected with the power input end 100, the power output end 200 and the starting module 300, and is used for controlling the electrical connection and disconnection of the power input end 100 and the power output end 200;

the second converting unit 405, the second switching unit 404 and the detection module 500 are electrically connected, and are configured to receive the first control signal input by the detection module 500, output a third control signal to the second switching unit 404 according to the first control signal, and control on/off of the second switching unit 404.

In this embodiment, the second switch unit 404 includes a third switch tube or a plurality of third switch tubes electrically connected in parallel, and the third switch tube is a P-channel mosfet, as shown in fig. 3, that is, the third switch tube Q16, the third switch tube Q17, the third switch tube Q18, the third switch tube Q19 and the third switch tube Q20 in the second switch unit 404 are all P-channel MOS tubes.

The source of the third switching tube Q16, the source of the third switching tube Q17, the source of the third switching tube Q18, the source of the third switching tube Q19 and the source of the third switching tube Q20 are electrically connected to the power input 100 after being connected in parallel, and are connected to the connection point of the start module 300 and the power input 100 in parallel, the drain of the third switching tube Q16, the drain of the third switching tube Q17, the drain of the third switching tube Q18, the drain of the third switching tube Q19 and the drain of the third switching tube Q20 are electrically connected to the power output 200 after being connected in parallel, and are connected to the connection point of the start module 300 and the power output 200 in parallel, and the gate of the third switching tube Q16, the gate of the third switching tube Q17, the gate of the third switching tube Q18, the gate of the third switching tube Q19 and the gate of the third switching tube Q20 are electrically connected to the second conversion unit 405 after being connected in parallel. The third switching tube Q16, the third switching tube Q17, the third switching tube Q18, the third switching tube Q19 and the third switching tube Q20 control the on/off of the power input end 100 and the power output end 200, so that when the instantaneous high voltage is input at the power input end 100, the instantaneous high voltage is inhibited from being output to the power output end 200.

In this embodiment, the second converting unit 405 is specifically, as shown in fig. 3, the second converting unit 405 includes a first transistor Q21, a first resistor R22, a second resistor R23, a first voltage regulator D10, and a first capacitor C16, a collector of the first transistor Q21 is electrically connected to the power input terminal 100 through the first resistor R22 and the second resistor R23, an emitter of the first transistor Q21 is grounded, a base of the first transistor Q21 is electrically connected to the output terminal of the detecting module 500, a gate of the third transistor Q16, a gate of the third transistor Q17, a gate of the third transistor Q19 of the third transistor Q18, and a gate of the third transistor Q20 in the second switching unit 404 are electrically connected in parallel and then electrically connected to an electrical connection point between the collector of the first transistor Q21 and the second resistor R23. One end of the first capacitor C16 is electrically connected to the power input terminal 100, the other end of the first capacitor C16 is electrically connected to the electrical connection point between the collector of the first transistor Q21 and the second resistor R23, the negative electrode of the first voltage regulator D10 is electrically connected to the power input terminal 100, and the positive electrode of the first voltage regulator D10 is electrically connected to the electrical connection point between the collector of the first transistor Q21 and the second resistor R23.

The base of the first transistor Q21 receives the first control signal input by the detection module 500, the first control signal controls the first transistor Q21 to be turned on, after the first transistor Q21 is turned on, the collector voltage of the first transistor Q21 is pulled low, due to the voltage dividing effect of the first resistor R22 and the first resistor R22, a third control signal is generated at the gate of the third transistor Q16, the gate of the third transistor Q17, the gate of the third transistor Q18 and the gate of the third transistor Q19, so as to control the turn-on of the second switch unit 404, and when the first control signal input by the base reception detection module 500 of the first transistor Q21 does not satisfy the turn-on condition of the first transistor Q21, the corresponding second switch unit 404 is also turned off.

In one embodiment of the present application, the detection module 500 includes:

the detection unit 501 is electrically connected to the start module 300 and the switch module 400, and is configured to output a first control signal and a third control signal according to the constant current signal, where the first control signal is used to control on/off of the switch module 400. Specifically, as shown in fig. 1 and 3, the detection unit 501 includes a first voltage-dividing resistor R4, a second voltage-dividing resistor R11, and a third voltage-dividing resistor R13, which are electrically connected in sequence, the other end of the first voltage-dividing resistor R4 is electrically connected to an electrical connection point between the start module 300 and the power output terminal 200, and the base of the transistor Q10 (or the first transistor Q21) is electrically connected to an electrical connection node between the second voltage-dividing resistor R11 and the third voltage-dividing resistor R13. The constant current signal output by the starting module 300 is detected through the electric connection point of the first voltage-dividing resistor R4, the starting module 300 and the power output end 200, a first control signal is formed by dividing voltage between the second voltage-dividing resistor R11 and the third voltage-dividing resistor R13, a third control signal is formed by dividing voltage between the first voltage-dividing resistor R4 and the second voltage-dividing resistor R11, and the on-off of the transistor Q10 is controlled through the first control signal, so that the on-off of the switch module 400 is controlled.

In an application process, when the starting module 300 receives a power signal input by the power input terminal 100, the starting module 300 outputs a constant current signal with a preset current value, and the power output terminal 200 is charged, voltages with a certain value are applied to two ends of the first voltage-dividing resistor R4, two ends of the second voltage-dividing resistor R11, and two ends of the third voltage-dividing resistor R13, when a voltage of an electrical connection node of the second voltage-dividing resistor R11 and the third voltage-dividing resistor R13 meets a conduction condition of the triode Q10 (or the first triode Q21), the triode Q10 (or the first triode Q21) is conducted, the switch module 400 is conducted, and the power output terminal 200 receives the power signal; on the contrary, when the power signal input by the input terminal is a surge voltage or the power output terminal 200 is short-circuited, and the voltage at the electrical connection node of the second voltage-dividing resistor R11 and the third voltage-dividing resistor R13 cannot satisfy the conduction condition of the transistor Q10 (or the first transistor Q21), the corresponding transistor Q10 (or the first transistor Q21) is turned off, and the power output terminal 200 cannot receive the power signal.

In an embodiment of the present application, when the power output 200 is short-circuited, the power output is restored again, or the power input 100 has voltage jitter, for example, when the power input 100 is in contact with or is plugged badly, the switch module 400 is turned on/off too frequently, so that a large surge occurs in the hot swap circuit, which may easily damage components in the hot swap circuit. In order to solve the problem of voltage jitter, the present embodiment proposes the anti-jitter delay unit 502, that is, the detection module 500 further includes:

and the anti-jitter delay unit 502 is electrically connected with the detection unit 501, and is configured to detect a voltage value of the third control signal and control on/off of the detection unit 501 according to the voltage value of the third control signal and a preset delay start voltage value.

In one embodiment of the present application, the anti-jitter delay unit 502 includes:

the control part 503 is used for controlling the on/off of the detection unit 501 according to the voltage value of the third control signal and a preset delay starting voltage value;

the delay unit 504, the delay unit 504 is used to control the detection unit 501 to start with a delay.

Specifically, the delay unit 504 includes a second capacitor C5 and a first diode D4, and the control unit 503 includes a third capacitor C3, a third resistor R10, a sixth resistor R8, a fourth resistor R12, a fifth resistor R14, a second triode Q9 and a third triode Q11, where the second triode Q9 is a PNP triode and the third triode Q11 is an NPN triode.

As shown in fig. 1 and 3, one end of a third capacitor C3 is electrically connected to an electrical connection point of the resistor R4 and the resistor R11, the other end of the third capacitor C3 is grounded, the anode of the first diode D4 is electrically connected to the third capacitor C3, the cathode of the first diode D4 is electrically connected to the emitter of the second transistor Q9, one end of a second capacitor C5 is electrically connected to an electrical connection point of the cathode of the first diode D4 and the emitter of the second transistor Q9, the other end of the second capacitor C5 is grounded, the collector of the second transistor Q9 is electrically connected to one end of the fourth resistor R12, the base of the second transistor Q9 is electrically connected to the anode of the first diode D4 through a sixth resistor R8, the other end of the fourth resistor R12 is electrically connected to the ground through a fifth resistor R6, the base of the third transistor Q11 is electrically connected to an electrical connection point of the fourth resistor R12 and the fifth resistor R14, the collector of the third transistor Q11 is electrically connected to the anode of the first diode R4 through a resistor R6855, the emitter of the third transistor Q11 is grounded.

In this embodiment, the third control signal is a divided signal formed between the first voltage dividing resistor R4 and the second voltage dividing resistor R11, and the preset delay start voltage value is a voltage value of the turn-on voltage of the second transistor Q9.

In the application process, when no voltage jitter occurs and the power output end 200 is charged, the second capacitor C5 is charged through the first voltage-dividing resistor R4 and the first diode D4, so that a first control signal formed by dividing the voltage of the first voltage-dividing resistor R4, the second voltage-dividing resistor R11 and the third voltage-dividing resistor R13 satisfies the turn-on voltage of the transistor Q10 (or the first transistor Q21), and when the second capacitor C5 is charged to satisfy the turn-on voltage of the transistor Q10 (or the first transistor Q21), the switch module 400 is correspondingly maintained to be turned on.

When the circuit is jittered, that is, the voltage of the power output terminal 200 drops, the divided voltage value of the first voltage dividing resistor R4, which forms the third control signal, between the first voltage dividing resistor R11 and the second voltage dividing resistor R11 drops correspondingly, and simultaneously the voltage of the base of the second transistor Q9 also drops synchronously, but the voltage of the second capacitor C5 in the delay unit 504 remains unchanged, and the first diode D4 blocks the current backflow of the emitter of the second transistor Q9, so that the second transistor Q9 is in the off state, when the voltage of the base of the second transistor Q9 drops to the preset starting voltage value, that is, the voltage of the base of the second transistor Q9 drops to the conducting voltage of the second transistor Q9, the second transistor Q9 is turned on, the fourth resistor R12 and the fifth resistor R14 divide the voltage, so that the third transistor Q11 is turned on, and the divided voltage point of the resistor R4 is pulled to the ground, thereby controlling the whole detection module 500 to lock, after a period of time, the second transistor Q9 is turned off until the second capacitor C5 in the delay portion discharges to a voltage value that makes the delay start voltage value not meet the turn-on voltage of the second transistor Q9, and at the same time, the third transistor Q11 cannot be turned on, that is, the lock is released. Therefore, when voltage jitter occurs in the circuit, the detection module 500 and the switch module 400 are controlled to be disconnected, damage of instantaneous high voltage to the whole circuit is avoided, a driving board or a peripheral connected with the power output end 200 is better protected, and the circuit is safer.

In one embodiment of the present application, a control device is provided, where the control device includes a hot swap circuit, and the hot swap circuit is a hot swap circuit.

In an embodiment of the present application, the present application further provides an electronic device, which includes a hot swap circuit or a control apparatus as described above.

In the embodiment, as shown in fig. 4, the electronic device may be a lighting device 800, the lighting device 800 has an input port 801, the input port 801 is used for being electrically connected with a control device 900 so as to control, drive or supply power to the lighting device 800 through the control device 900, and the hot swap circuit 802 may be disposed in the lighting device 800 and between the input port 801 and the light source driver board 803.

In this embodiment, the electronic device may also be the control device 900, the control device 900 has an input port 901 and an output port 902, the input port 901 is used for receiving an external power input, the output port 902 is used for being electrically connected with the lighting device 800 to control, drive or supply power to the lighting device 800 through the control device 900, and the above hot swap circuit may be disposed in the control device 900 and located at the input port 901.

The hot-plug circuit and the electronic device provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A hot swap circuit, comprising:

a power input terminal (100) and a power output terminal (200);

the starting module (300) is electrically connected with the power input end (100) and the power output end (200) and is used for outputting a constant current signal with a preset current value to charge the power output end (200);

a switch module (400), the switch module (400) comprising a second switching unit (404) and a second switching unit (405);

the detection module (500) is electrically connected with the starting module (300), the switch module (400) and the power output end (200) and is used for outputting a first control signal according to the constant current signal and controlling the on-off of the switch module (400) according to the voltage value of the first control signal and the preset voltage value range of the first control signal;

the second switch unit (404) is electrically connected with the power input end (100) and the power output end (200) and is used for controlling the electrical connection on and off of the power input end (100) and the power output end (200);

the second switching unit (405) is electrically connected with the second switching unit (404) and the detection module (500), and is configured to receive a first control signal input by the detection module (500), output a third control signal to the second switching unit (404) according to the first control signal, and control on/off of the second switching unit (404).

2. The hot swap circuit of claim 1, wherein the second switch unit (404) comprises a third switch transistor and/or a plurality of third switch transistors electrically connected in parallel, and the third switch transistor is a P-channel mosfet.

3. The hot swap circuit of claim 2, wherein the second switching unit (405) comprises a first transistor, a first resistor, a second resistor, a first voltage regulator and a first capacitor, a collector of the first transistor is electrically connected to the power input terminal (100) through the first resistor and the second resistor, an emitter of the first transistor is grounded, a base of the first transistor is electrically connected to the output terminal of the detection module (500), a gate of the third transistor of the second switching unit (404) is electrically connected to an electrical connection point of the collector of the first transistor and the second resistor, one end of the first capacitor is electrically connected to the power input terminal (100), the other end of the first capacitor is electrically connected to the electrical connection point of the collector of the first transistor and the second resistor, and a cathode of the first voltage regulator is electrically connected to the power input terminal (100), and the anode of the first voltage-regulator tube is electrically connected to the electric connection point of the collector of the first triode and the second resistor.

4. A hot plug circuit according to claim 1, wherein the start module (300) comprises a first switch tube (301), a first voltage divider (302), a second voltage divider (303) and a voltage regulator tube (304), the first end of the first switch tube (301) and the first end of the second voltage division part (303) are both electrically connected with the power input end (100), the second end of the second voltage division part (303) is electrically connected with the first end of the voltage-stabilizing tube (304), the second end of the first switch tube (301) is electrically connected to an electrical connection point where the second end of the second voltage division part (303) is electrically connected with the first end of the voltage regulator tube (304), the third end of the first switch tube (301) is electrically connected with the first end of the first voltage division part (302), the second end of the first voltage division part (302) is electrically connected with the second end of the voltage-stabilizing tube (304).

5. The hot plug circuit of claim 3, wherein the detection module (500) comprises:

and the detection unit (501) is electrically connected with the starting module (300) and the switch module (400) and is used for outputting a first control signal and a third control signal according to the constant current signal, wherein the first control signal is used for controlling the on-off of the switch module (400).

6. The hot swap circuit of claim 5, wherein the detection unit (501) comprises a first voltage divider resistor, a second voltage divider resistor and a third voltage divider resistor electrically connected in sequence, wherein the other end of the first voltage divider resistor is electrically connected to the power connection point of the start module (300) and the power output terminal (200), and the base of the first transistor is electrically connected to the electrical connection node of the second voltage divider resistor and the third voltage divider resistor.

7. The hot plug circuit of claim 5, wherein the detection module (500) further comprises:

the anti-jitter delay unit (502) is electrically connected with the detection unit (501) and is used for detecting the voltage value of the third control signal and controlling the on-off of the detection unit (501) according to the voltage value of the third control signal and a preset delay starting voltage value;

the anti-jitter delay unit (502) comprises:

the control part (503) is used for controlling the on-off of the detection unit (501) according to the voltage value of the third control signal and a preset delay starting voltage value;

the delay part (504), the delay part (504) is used for controlling the control part (503) to start in a delay way.

8. The hot swap circuit of claim 7, wherein the delay portion (504) comprises a second capacitor, a first diode, the control portion (503) comprises a third capacitor, a third resistor, a sixth resistor, a fourth resistor, a fifth resistor, a second transistor, and a third transistor, one end of the third capacitor is electrically connected to the detection module (500), the other end of the third capacitor is grounded, the anode of the first diode is electrically connected to the third capacitor, the cathode of the first diode is electrically connected to the emitter of the second transistor, one end of the second capacitor is electrically connected to the point where the cathode of the first diode is electrically connected to the emitter of the second transistor, the other end of the second capacitor is grounded, the collector of the second transistor is electrically connected to one end of the fourth resistor, and the base of the second transistor is electrically connected to the anode of the first diode through the sixth resistor, the other end of the fourth resistor is grounded through the fifth resistor, the base electrode of the third triode is electrically connected to the electric connection point of the fourth resistor and the fifth resistor, the collector electrode of the third triode is electrically connected with the anode of the first diode through the third resistor, and the emitter electrode of the third triode is grounded.

9. A hot swap circuit according to claim 1, wherein a surge protection module is electrically connected to each of the power input (100) and the power output (200) for suppressing a surge voltage input to the power input (100) and the power output (200).

10. An electronic device comprising a hot swap circuit according to any of claims 1-9.