CN115642577A - Hot plug circuit - Google Patents
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- CN115642577A CN115642577A CN202211198667.8A CN202211198667A CN115642577A CN 115642577 A CN115642577 A CN 115642577A CN 202211198667 A CN202211198667 A CN 202211198667A CN 115642577 A CN115642577 A CN 115642577A
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Abstract
The invention discloses a hot plug circuit, relates to the field of power hot plug technology, solves the problems of startup surge, hot plug surge and contact sparking caused by hot plug, and also has the advantages of simple structure, low cost and low development difficulty. The specific scheme comprises the following steps: the triode pre-charging module is arranged in the circuit and is used for pre-charging when a power supply of the circuit is started or plugged; the field effect transistor charging module is arranged in the circuit and used for outputting stable power and current after a power supply of the circuit is started or plugged into a stable state; the triode precharge module is also used for outputting reference voltage; the reference voltage is a working voltage when a power supply of the circuit is started or plugged into a steady state; and the circuit switching module is electrically connected with the field effect tube charging module and the triode pre-charging module and is used for acquiring the reference voltage and switching the field effect tube charging module to work until the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
Description
Technical Field
The invention relates to the field of power hot plug technology, in particular to a hot plug circuit.
Background
With the continuous development of ultra-high power supplies and lithium battery energy storage technologies and the continuous popularization of related energy storage equipment and new energy equipment, the demands of people on high-end power supply technologies and electric energy control technologies are further improved. For example: and (4) performing hot plug on a power supply of a capacitor with super-high power and heavy load.
The existing power hot plug of a capacitor with high power and large load can cause the phenomena of startup surge, ignition, contact oxidation and the like. To solve the above problems, the following three methods are generally adopted at present: the first is a pre-charging application mode, namely, the pre-charging application mode is realized by matching a relay or a semiconductor switching device with a pre-charging resistor; this approach requires a large current power resistor and a relay or semiconductor switching device, and the lifetime of the relay may seriously affect the lifetime of the entire hot swap circuit. The second is a pulse width modulation chopping mode of semiconductor devices such as field effect transistors and the like; although this method is the most efficient method, the requirement for the accuracy of pulse width modulation is extremely high for the ultra-high power and the capacitance of a large load, and the requirement for the current stress of a semiconductor device such as a field effect transistor is extremely high for the other, and this method also introduces the problem of electromagnetic interference. The third is a mode of connecting semiconductor devices such as field effect transistors and the like in parallel with a matrix; this approach increases the size of the hot swap circuit and increases the circuit cost.
Disclosure of Invention
The invention provides a hot plug circuit, which solves the problems of startup surge, hot plug surge and contact sparking caused by hot plug.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a hot plug circuit, comprising:
the triode pre-charging module is arranged in the circuit and used for performing pre-charging work when a power supply of the circuit is started or plugged;
the field effect transistor charging module is arranged in the circuit and used for outputting stable power and current after a power supply of the circuit is started or plugged into a stable state;
the triode pre-charging module is also used for outputting reference voltage; the reference voltage is a working voltage when a power supply of the circuit is started or plugged into a stable state;
and the circuit switching module is electrically connected with the field effect tube charging module and the triode pre-charging module and is used for acquiring the reference voltage and switching the field effect tube charging module to work until the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
In one possible implementation manner, the hot plug circuit further includes:
and the enabling switch module is electrically connected with the triode pre-charging module and used for receiving an enabling signal and controlling the triode pre-charging module to work according to the enabling signal.
In one possible implementation, the fet charging module includes:
the field effect tube charging unit is arranged in the circuit and used for outputting stable power and current;
and the charging driving unit is electrically connected with the field effect tube charging unit and used for controlling the field effect tube charging unit to conduct and work after the difference value of the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
In one possible implementation, the triode pre-charge module includes:
the triode pre-charging unit is connected with the field effect tube charging unit in parallel and arranged in the circuit and used for pre-charging when the circuit is started or hot plugged;
and the precharge driving circuit is electrically connected with the triode precharge unit and is used for controlling the conduction work of the triode precharge unit according to the enabling signal.
In one possible implementation, the fet charging unit includes a fet;
the charging driving unit comprises a first triode and a diode;
the field effect transistor is a P-channel field effect transistor, and the first triode is an NPN type triode;
the grid electrode of the field effect transistor is connected with the anode of the diode, the drain electrode of the field effect transistor is connected with the cathode of the diode, and the source electrode of the field effect transistor is the anode of the output end of the circuit;
and the collector of the first triode is connected with the anode of the diode, the base of the first triode is connected with the circuit switching module, and the emitter of the first triode is grounded.
In one possible implementation manner, the triode pre-charging unit comprises a second triode;
the pre-charging driving circuit comprises a third triode;
the second triode is a PNP triode and the third triode is an NPN triode;
an emitter of the second triode is connected with a drain electrode of the field effect tube, a collector of the second triode is connected with a grid electrode of the field effect tube, and a base of the second triode is connected with a collector of the third triode;
and the base electrode of the third triode is connected with the enabling switch module, and the emitting electrode of the third triode is grounded.
In one possible implementation, the pre-charge driving circuit further includes a first capacitor;
one end of the first capacitor is connected with the emitting electrode of the second triode, and the other end of the first capacitor is connected with the base electrode of the second triode.
In one possible implementation manner, the circuit switching module includes a fourth transistor;
the fourth triode is a PNP type triode;
the base electrode of the fourth triode is connected with the collector electrode of the third triode, the emitter electrode of the fourth triode is connected with the source electrode of the field effect transistor, and the collector electrode of the fourth triode is connected with the base electrode of the first triode;
the reference voltage is a working voltage collected from any point between connecting lines from the collector electrode of the third triode to the drain electrode of the field effect transistor.
In one possible implementation, the enable switch module includes a fifth transistor;
the fifth triode is a PNP triode;
the base electrode of the fifth triode is connected with the source electrode of the field effect tube, the emitting electrode of the fifth triode is connected with the drain electrode of the field effect tube, and the collecting electrode of the fifth triode is connected with the base electrode of the third triode;
the enable signal is received from any point between a connection of a collector of the fifth transistor to a base of the third transistor.
In a possible implementation manner, the rated power of the fet charging unit and the rated power of the triode pre-charging unit are both greater than 500W.
According to the hot plug circuit provided by the embodiment of the invention, when a power supply of the circuit is started or hot plug is carried out, the conduction of the triode pre-charging module is controlled, and the problems of startup surge, hot plug surge and contact sparking caused by hot plug are solved by utilizing the wide SOA characteristic and the current amplification characteristic of the triode; after a power supply of the circuit is started or plugged into a stable state, the field effect tube charging module is controlled to be conducted, and continuous and stable power and current are provided for a load at the output end of the circuit; and after the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value, the circuit is switched from the work of the triode pre-charge module to the work of the field-effect tube charging module through the circuit switching module.
The hot plug circuit provided by the embodiment of the invention can be widely applied to the technical field of power hot plug, is particularly suitable for occasions with hot plug and load capacitance of electric tools, electric vehicle battery replacement, electric tool battery replacement, equipment power supplies, server power supplies and the like, is suitable for various levels of markets such as civil consumption, industrial production and automotive electronics, can effectively solve the problems of startup surge, hot plug surge and contact ignition caused by hot plug, thereby protecting the safety of power supplies and electric equipment at the output end of the circuit, and has the advantages of simple structure, low cost and low development difficulty.
Drawings
Fig. 1 is a block diagram of an overall structure of a hot plug circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a hot swap circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a triode precharge module of a hot swap circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a fet charging module of a hot swap circuit according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a circuit switching module of a hot swap circuit according to an embodiment of the present invention;
fig. 6 is a circuit diagram of an enable switch module of a hot swap circuit according to an embodiment of the present invention.
Parts and reference number description:
1. a field effect transistor charging module; 11. a field effect transistor charging unit; 12. a charging drive unit; 2. a triode pre-charging module; 21. a triode pre-charging unit; 22. a precharge driving circuit; 3. a circuit switching module; 4. the switch module is enabled.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified. In addition, the use of "based on" or "according to" means open and inclusive, as a process, step, calculation, or other action that is "based on" or "according to" one or more conditions or values may, in practice, be based on additional conditions or exceeded values.
In order to solve the problems of startup surge, hot plug surge and contact sparking caused by hot plug, the embodiment of the invention provides a hot plug circuit.
Fig. 1 is a block diagram of an overall structure of a hot plug circuit according to an embodiment of the present invention. Fig. 2 is an overall circuit diagram of a hot plug circuit according to an embodiment of the present invention.
As shown in fig. 1 and fig. 2, the hot swap circuit includes a transistor pre-charging module 2, a field effect transistor charging module 1, and a circuit switching module 3.
The triode precharge module 2 is arranged in the circuit and used for performing precharge work when the power supply of the circuit is started or plugged.
The field effect transistor charging module 1 is arranged in the circuit and used for outputting stable power and current after a power supply of the circuit is started or plugged into a stable state.
The triode precharge module 2 is also used for outputting reference voltage; the reference voltage is a working voltage when a power supply of the circuit is started or plugged into a steady state.
The circuit switching module 3 is electrically connected with the triode pre-charging module 2 and the field effect transistor charging module 1 and is used for acquiring reference voltage and switching the field effect transistor charging module 1 to work until the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
Furthermore, the hot plug circuit further comprises an enabling switch module 4.
The enabling switch module 4 is electrically connected with the triode pre-charging module 2 and is used for receiving an enabling signal and controlling the triode pre-charging module 2 to work according to the enabling signal.
Specifically, the enabling signal includes a low level signal, a high level signal and a no signal, the enabling switch module 4 can enter an external active enabling state when receiving the low level signal or the high level signal, and controls the triode pre-charging module 2 to work according to the received enabling signal; the enabling switch module 4 can carry out negative heat carrying plugging on a power supply in a no-signal state, and enters a passive enabling state to control the triode pre-charging module 2 to work.
As shown in fig. 2, the fet charging module 1 includes a fet charging unit 11 and a charge driving unit 12.
The fet charging unit 11 is disposed in the circuit and configured to output stable power and current.
The charging driving unit 12 is electrically connected to the fet charging unit 11, and is configured to control the fet charging unit 11 to conduct when a difference between an output voltage of the circuit and a reference voltage is greater than a preset threshold.
The triode precharge module 2 includes a triode precharge unit 21 and a precharge driving circuit 22.
The triode precharging unit 21 and the field effect transistor charging unit 11 are connected in parallel in the circuit and are used for precharging work when the circuit is started or hot plugged;
the precharge driving circuit 22 is electrically connected to the transistor precharge unit 21, and is configured to control the transistor precharge unit 21 to conduct according to an enable signal.
Furthermore, the rated power of the field effect transistor charging unit 11 and the rated power of the triode pre-charging unit 21 are both larger than 500W.
Fig. 3 is a circuit diagram of the triode precharge module 2 of the hot swap circuit according to the embodiment of the present invention.
As shown in fig. 3, the triode precharge unit 21 includes a second triode Q4; the precharge driving circuit 22 includes a third transistor Q5.
In this embodiment, the second transistor Q4 is a PNP transistor, and the third transistor Q5 is an NPN transistor.
The emitter of the second triode Q4 and the positive electrode Vin of the input end of the circuit + Connected, the collector of the second triode Q4 is connected with the positive electrode Vout of the output end of the circuit + And the base electrode of the second triode Q4 is connected with the collector electrode of the third triode Q5.
The base of the third triode Q5 is connected with the output end Q5_ b of the enabling switch module 4, the emitter of the third triode Q5 is connected with the negative electrode Vin of the input end of the circuit - Vout of the output terminal of the sum circuit - And after connection, the grounding is connected.
Positive pole Vout of output end of circuit + Vout of the output terminal of the AND circuit - An equivalent load capacitor C1 is connected between the anode of the equivalent load capacitor C1 and the anode Vout of the output end of the circuit + Connecting the cathode of the equivalent load capacitor C1 with the cathode Vout of the output terminal of the circuit - And (4) connecting.
Further, the pre-charge driving circuit 22 further includes a first capacitor C2, one end of the first capacitor C2 is connected to the emitter of the second transistor Q4, and the other end is connected to the base of the second transistor Q4. The transient response of the base of the second triode Q4 is suppressed by the first capacitor C2, so that the soft switching-on of the triode pre-charging unit 21 is realized when the power supply is subjected to hot plug or starting.
In this embodiment, in order to protect the second transistor Q4 and the third transistor Q5, the precharge driving circuit 22 further includes a first resistor R3, a second resistor R6, and a third resistor R7.
One end of the first resistor R3 and the input end anode Vin of the circuit + And the other end of the second resistor R6 is connected with the collector of a third triode Q5, one end of a third resistor R7 is connected with the collector of the third triode Q5, and the other end of the third resistor R7 is connected with the base of the first capacitor C2 and the second triode Q4.
Specifically, the resistance value of the first resistor R3 is 39K, the resistance value of the second resistor R6 is 10K, and the resistance value of the third resistor R7 is 1K.
Only when the output Q5_ b of the enable switch module 4 is at a high level, the third triode Q5 is turned on, the base of the second triode Q4 is pulled down, the base current is provided to the second triode Q4 through the third resistor R7, the current and the working state of the second triode Q4 are controlled, and the working state of the second triode Q4 includes a conducting state and a turning-off state.
Fig. 4 is a circuit diagram of the fet charging module 1 of the hot swap circuit according to the embodiment of the present invention.
As shown in fig. 4, the fet charging unit 11 includes a fet Q2; the charging driving unit 12 includes a first transistor and a diode D1.
In this embodiment, the fet Q2 is a P-channel fet Q2, and the first transistor is an NPN transistor.
The grid electrode of the field effect transistor Q2 is connected with the anode of the diode D1, the drain electrode of the field effect transistor Q2 is connected with the cathode of the diode D1 and the emitting electrode of the second triode Q4, and the source electrode of the field effect transistor Q2 is connected with the collector electrode of the second triode Q4.
The collector of the first triode is connected with the anode of the diode D1, the base of the first triode is connected with the output end Q6_ b of the circuit switching module 3, and the emitter of the first triode is connected with the negative electrode Vin of the input end of the circuit - Vout of the output terminal of the sum circuit - And after connection, the ground is connected.
In this embodiment, in order to protect the first transistor, the charging driving unit 12 further includes a fourth resistor R8. One end of the fourth resistor R8 is connected to the collector of the first triode, and the other end of the fourth resistor R8 is connected to the anode of the diode D1 and the gate of the field-effect transistor Q2.
The charging driving unit 12 further includes a fifth resistor R2, and the fifth resistor R2 is connected in parallel to two ends of the diode D1, and is used for determining the working state of the diode D1 at the moment of power-on.
Specifically, the resistance of the fourth resistor R8 is 10K, the operating voltage of the diode D1 is 12V, and the resistance of the fifth resistor R2 is 10K.
At the positive pole Vout of the output terminal of the circuit + When the difference between the output voltage and the reference voltage is greater than the preset threshold, the output end Q6_ b of the circuit switching module 3 is pulled high, so that the first triode is conducted, the diode D1 provides stable voltage for the field-effect tube Q2, the field-effect tube Q2 is continuously conducted, and continuous power and current are provided for the rear-stage load of the circuit output end in a stable state.
Fig. 5 is a circuit diagram of the circuit switching module 3 of the hot plug circuit according to an embodiment of the present invention.
As shown in fig. 5, the circuit switching module 3 includes a fourth transistor Q1;
in this embodiment, the fourth transistor Q1 is a PNP transistor.
The base electrode of the fourth triode Q1 is connected with the collector electrode of the third triode Q5, the emitter electrode of the fourth triode Q1 is connected with the source electrode of the field effect tube Q2, and the collector electrode of the fourth triode Q1 is connected with the negative electrode Vin of the input end of the circuit - Vout of the output terminal of the sum circuit - And after connection, the grounding is connected.
The collector of the fourth triode Q1 is the output Q6_ b of the circuit switching module 3 and is connected to the base of the third triode Q5.
Further, the reference voltage is an operating voltage collected from any point between the connection lines from the collector of the third transistor Q5 to the drain of the field effect transistor Q2.
In this embodiment, in order to protect the fourth transistor Q1, the circuit switching module 3 further includes a sixth resistor R4 and a seventh resistor R9. One end of the sixth resistor R4 is connected to the collector of the fourth triode Q1, the other end of the sixth resistor R4 is connected to the seventh resistor R9, and the other end of the seventh resistor R9 is grounded.
The base of the third transistor Q5 is connected in circuit between the sixth resistor R4 and the seventh resistor R9.
The base of the fourth transistor Q1 is connected to the circuit between the first resistor R3 and the second resistor R6.
In this embodiment, the resistance of the sixth resistor R4 is 20K, the resistance of the seventh resistor R9 is 10K, and the preset threshold is 0.7V.
The precharge driving circuit 22 also supplies the reference voltage to the circuit switching block 3.
The reference voltage Vref is obtained by calculation according to the circuit input end voltage Vin, the first resistor R3 and the second resistor R6, and the specific calculation formula is as follows:
when the positive pole Vout of the output end of the circuit + When the output voltage is increased to 0.7V higher than the reference voltage by the transistor pre-charging unit 21, the fourth transistor Q1 is turned on, and the output end Q6_ b of the circuit switching module 3 is pulled high, thereby completing the switching from the transistor pre-charging module 2 to the field effect transistor charging module 1.
Fig. 6 is a circuit diagram of the enable switch module 4 of the hot swap circuit according to the embodiment of the present invention.
As shown in fig. 6, the enable switch module 4 includes a fifth transistor Q3.
In this embodiment, the fifth transistor Q3 is a PNP transistor.
The base of the fifth triode Q3 is connected with the source electrode of the field effect tube Q2, the emitting electrode is connected with the drain electrode of the field effect tube Q2, and the collecting electrode is connected with the base of the third triode Q5.
The enable signal is received from any point between the connection of the collector of the fifth transistor Q3 to the base of the third transistor Q5.
In this embodiment, in order to protect the five triodes, the enable switch module 4 further includes an eighth resistor R1, a ninth resistor R5, and a tenth resistor R10.
One end of an eighth resistor R1 is connected with the base electrode of the fifth triode Q3, the other end of the eighth resistor R1 is connected with the source electrode of the field effect transistor Q2, one end of a ninth resistor R5 is connected with the collector electrode of the fifth triode Q3, the other end of the ninth resistor R5 is connected with a tenth resistor R10, and the other end of the tenth resistor R10 is connected with the base electrode of the third triode Q5.
The input port EN of the enable signal is connected to a circuit between the ninth resistor R5 and the tenth resistor R10.
When the input port EN of the enable signal is pulled low, the output terminal Q5_ b of the enable switch module 4 is in a low level state; on the contrary, when the input port EN of the enable signal is pulled high, active enabling is performed, so that the output end Q5_ b of the enable switch module 4 is in a high level state.
When the input port EN of the enable signal has no signal, the power supply carries out negative heat carrying plugging, and the positive pole Vout of the output end of the circuit + The voltage is low potential, so as to trigger the fifth triode Q3 to be conducted, so that the output end Q5_ b of the enabling switch module 4 is in a high level state, and the passive enabling is completed.
According to the hot plug circuit provided by the embodiment of the invention, when the power supply of the circuit is started or hot plug is carried out, the triode pre-charging module 2 is controlled to be conducted, and the problems of startup surge, hot plug surge and contact sparking caused by hot plug are solved by utilizing the wide SOA characteristic and the current amplification characteristic of the triode; after a power supply of the circuit is started or plugged into a stable state, the field effect tube charging module 1 is controlled to be conducted, and continuous and stable power and current are provided for a load at the output end of the circuit; and after the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value, the circuit is switched from the work of the triode pre-charging module 2 to the work of the field effect tube charging module 1 through the circuit switching module 3.
The hot plug circuit provided by the embodiment of the invention can be used as a third module to be connected between a power output and a load, can be widely applied to the technical field of power hot plug, is particularly suitable for occasions with hot plug and load capacitance, such as electric tools, electric vehicle battery replacement, electric tool battery replacement, equipment power supplies, server power supplies and the like, is suitable for various levels of markets such as civil consumption, industrial production and automobile electronics, can effectively solve the problems of startup surge, hot plug surge and contact sparking caused by hot plug, thereby protecting the safety of power supplies and circuit output end electric equipment, and has the advantages of simple structure, low cost and low development difficulty.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A hot swap circuit, comprising:
the triode pre-charging module is arranged in the circuit and used for performing pre-charging work when a power supply of the circuit is started or plugged;
the field effect transistor charging module is arranged in the circuit and used for outputting stable power and current after a power supply of the circuit is started or plugged into a stable state;
the triode pre-charging module is also used for outputting reference voltage; the reference voltage is a working voltage when a power supply of the circuit is started or plugged into a stable state;
and the circuit switching module is electrically connected with the field effect tube charging module and the triode pre-charging module and is used for acquiring the reference voltage and switching the field effect tube charging module to work until the difference value between the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
2. The hot plug circuit of claim 1, further comprising:
and the enabling switch module is electrically connected with the triode pre-charging module and used for receiving an enabling signal and controlling the triode pre-charging module to work according to the enabling signal.
3. The hot swap circuit of claim 2, wherein the fet charging module comprises:
the field effect tube charging unit is arranged in the circuit and used for outputting stable power and current;
and the charging driving unit is electrically connected with the field effect tube charging unit and used for controlling the field effect tube charging unit to conduct and work after the difference value of the output voltage of the circuit and the reference voltage is greater than a preset threshold value.
4. A hot swap circuit in accordance with claim 3, wherein the triode pre-charge module comprises:
the triode pre-charging unit is connected with the field effect tube charging unit in parallel and arranged in the circuit and used for pre-charging when the circuit is started or hot plugged;
and the precharge driving circuit is electrically connected with the triode precharge unit and is used for controlling the conduction work of the triode precharge unit according to the enabling signal.
5. The hot-swap circuit of claim 4, wherein the FET charging unit comprises an FET;
the charging driving unit comprises a first triode and a diode;
the field effect transistor is a P-channel field effect transistor, and the first triode is an NPN-type triode;
the grid electrode of the field effect transistor is connected with the anode of the diode, the drain electrode of the field effect transistor is connected with the cathode of the diode, and the source electrode of the field effect transistor is the anode of the output end of the circuit;
and the collector of the first triode is connected with the anode of the diode, the base of the first triode is connected with the circuit switching module, and the emitter of the first triode is grounded.
6. The hot swap circuit of claim 5, wherein the transistor pre-charge unit comprises a second transistor;
the pre-charging driving circuit comprises a third triode;
the second triode is a PNP triode and the third triode is an NPN triode;
an emitting electrode of the second triode is connected with a drain electrode of the field effect transistor, a collector electrode of the second triode is connected with a grid electrode of the field effect transistor, and a base electrode of the second triode is connected with a collector electrode of the third triode;
and the base electrode of the third triode is connected with the enabling switch module, and the emitting electrode of the third triode is grounded.
7. A hot swap circuit according to claim 6, wherein the precharge driver circuit further comprises a first capacitor;
one end of the first capacitor is connected with the emitting electrode of the second triode, and the other end of the first capacitor is connected with the base electrode of the second triode.
8. The hot plug circuit of claim 6, wherein the circuit switching module comprises a fourth transistor;
the fourth triode is a PNP triode;
the base electrode of the fourth triode is connected with the collector electrode of the third triode, the emitter electrode of the fourth triode is connected with the source electrode of the field effect transistor, and the collector electrode of the fourth triode is connected with the base electrode of the first triode;
the reference voltage is a working voltage collected from any point between connecting lines from the collector electrode of the third triode to the drain electrode of the field effect transistor.
9. The hot plug circuit of claim 8, wherein the enable switch module comprises a fifth transistor;
the fifth triode is a PNP triode;
the base electrode of the fifth triode is connected with the source electrode of the field effect tube, the emitting electrode of the fifth triode is connected with the drain electrode of the field effect tube, and the collecting electrode of the fifth triode is connected with the base electrode of the third triode;
the enable signal is received from any point between a connection of a collector of the fifth transistor to a base of the third transistor.
10. The hot swap circuit of claim 4, wherein the FET charging unit and the triode precharge unit are both rated at a power of greater than 500W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211198667.8A CN115642577A (en) | 2022-09-29 | 2022-09-29 | Hot plug circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211198667.8A CN115642577A (en) | 2022-09-29 | 2022-09-29 | Hot plug circuit |
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| CN115642577A true CN115642577A (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211198667.8A Pending CN115642577A (en) | 2022-09-29 | 2022-09-29 | Hot plug circuit |
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| CN (1) | CN115642577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116015041A (en) * | 2023-03-17 | 2023-04-25 | 四川华鲲振宇智能科技有限责任公司 | Slow start circuit built based on MOSFET (Metal-oxide-semiconductor field Effect transistor) and control method |
-
2022
- 2022-09-29 CN CN202211198667.8A patent/CN115642577A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116015041A (en) * | 2023-03-17 | 2023-04-25 | 四川华鲲振宇智能科技有限责任公司 | Slow start circuit built based on MOSFET (Metal-oxide-semiconductor field Effect transistor) and control method |
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