CN112104219A - Take power soft start circuit of hot plug function - Google Patents
Take power soft start circuit of hot plug function Download PDFInfo
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- CN112104219A CN112104219A CN202011072362.3A CN202011072362A CN112104219A CN 112104219 A CN112104219 A CN 112104219A CN 202011072362 A CN202011072362 A CN 202011072362A CN 112104219 A CN112104219 A CN 112104219A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to the technical field of power supply systems, in particular to a power supply soft start circuit with a hot plug function, which comprises a system power supply interface module, a hot plug spike absorption module and a power supply soft start module, wherein the power supply soft start module is respectively electrically connected with the hot plug spike absorption module and the system power supply interface module; through setting up the hot plug peak and absorbing the module, can avoid appearing higher peak voltage and cause the influence to the system in the hot plug of system, and then protect the components and parts of system.
Description
Technical Field
The invention relates to the technical field of power supply systems, in particular to a power supply soft start circuit with a hot plug function.
Background
With the development of electronic technology, the requirements of various industries on the product performance and the service life are more and more strict; in the field of high-power motors, because the power of a system is higher in actual work, a power supply end of a power supply often needs a capacitor with higher capacity, and the capacity of the capacitor is generally more than thousands of muF. The large-capacity capacitor can maintain the fluctuation of the system voltage in a small amplitude range, and large power supply ripples cannot be generated due to the change of the motor load, so that the stability of the system is ensured. However, a large-capacity capacitor generates a large surge current at the initial power-on stage, and the surge current may damage devices such as a fuse or a MOS transistor of a system loop. Meanwhile, the service life of the capacitor can be greatly reduced by large surge current, so that the anti-fatigue capability of the system is poor. In order to solve the problem, in practical application, it is often considered to increase the impedance of the capacitor charging loop in the initial power-on phase, so as to ensure that the system does not generate a large surge current in the initial power-on phase.
In the prior art, surge current of a capacitor in an initial power-on stage is generally reduced by increasing impedance in a loop, and the mode can effectively avoid larger surge current of a system. However, in order to effectively suppress the surge current in the initial power-on stage, a component with a relatively large impedance, such as a resistor device, is generally used, and this way of increasing the impedance consumes a part of energy in the normal operation of the system, so that the current output capability of the subsequent load is reduced. These impedance devices consume energy in the form of heat, and heat dissipation needs to be considered in practical applications. In the use process of an actual product, a user may perform a hot-line operation, for example, when a system works normally, the interface is suddenly plugged and unplugged, and in this use mode, a relatively large dv/dt peak voltage is generated at a power interface, so that a switch tube of the system is damaged.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a power supply soft start circuit with a hot plug function is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a take power soft start circuit of hot plug function, includes system power supply interface module, hot plug spike absorption module and power soft start module, power soft start module absorbs module and system power supply interface module electricity with the hot plug spike respectively and is connected, the hot plug spike absorbs module and system power supply interface module electricity and is connected, power soft start module is connected with the motor drive circuit electricity of peripheral hardware.
The invention has the beneficial effects that:
through setting up power soft start module and system power supply interface module, at system initial power-on stage, through the impedance of system, reach the suppression to surge current, simultaneously, when the system normally works, system impedance can reduce to reasonable within range to can not consume the consumption of system. Through setting up the hot plug peak and absorbing the module, can avoid appearing higher peak voltage and cause the influence to the system in the hot plug of system, and then protect the components and parts of system. The power supply soft start circuit with the hot plug function can be applied to high-power supply systems, such as air conditioners, washing machines, industrial fans, electric vehicles and other fields, and the reliability and the service life of products can be improved through the circuit designed by the scheme.
Drawings
FIG. 1 is a block diagram of a module connection of a power soft start circuit with hot plug function according to the present invention;
FIG. 2 is a schematic diagram of a power supply soft start circuit with hot swap function according to the present invention;
description of reference numerals:
1. a system power supply interface module; 2. a hot plug spike absorption module; 3. a power supply soft start module; 4. a motor drive circuit.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the technical solution provided by the present invention is:
the utility model provides a take power soft start circuit of hot plug function, includes system power supply interface module, hot plug spike absorption module and power soft start module, power soft start module absorbs module and system power supply interface module electricity with the hot plug spike respectively and is connected, the hot plug spike absorbs module and system power supply interface module electricity and is connected, power soft start module is connected with the motor drive circuit electricity of peripheral hardware.
From the above description, the beneficial effects of the present invention are:
through setting up power soft start module and system power supply interface module, at system initial power-on stage, through the impedance of system, reach the suppression to surge current, simultaneously, when the system normally works, system impedance can reduce to reasonable within range to can not consume the consumption of system. Through setting up the hot plug peak and absorbing the module, can avoid appearing higher peak voltage and cause the influence to the system in the hot plug of system, and then protect the components and parts of system. The power supply soft start circuit with the hot plug function can be applied to high-power supply systems, such as air conditioners, washing machines, industrial fans, electric vehicles and other fields, and the reliability and the service life of products can be improved through the circuit designed by the scheme.
Further, the power supply soft start module comprises a resistor R3, a resistor R4, a resistor R5, a resistor R9, a resistor R10, a capacitor C4, a capacitor C5, a capacitor C6, a key switch SW1, a voltage regulator tube D1, a diode D2, a triode Q1 and a MOS tube Q2;
the base electrode of the triode Q1 is electrically connected with the anode of a voltage regulator tube D1, the cathode of the voltage regulator tube D1 is electrically connected with one end of a resistor R9, the other end of the resistor R9 is respectively electrically connected with one end of a resistor R10, one end of a capacitor C4, one end of a key switch SW1 and the anode of a diode D2, the emitter of the triode Q1 is respectively electrically connected with the other end of a resistor R10, the other end of a capacitor C4 and a hot plug spike absorption module, the collector of the triode Q1 is electrically connected with one end of a resistor R5, the other end of the resistor R5 is electrically connected with the gate of a MOS tube Q2, the source of the MOS tube Q2 is electrically connected with a system power supply interface module, the drain electrode of the MOS tube Q2 is respectively electrically connected with the cathode of a diode D2, one end of a capacitor C5, one end of a capacitor C6 and an external motor driving circuit, the other end of the capacitor C5 is electrically connected with the other end of a capacitor C874, the other end of the key switch SW1 is respectively electrically connected with one end of a resistor R3 and the other end of a resistor R4, and the other end of the resistor R3 is respectively electrically connected with the other end of a resistor R4, the hot plug spike absorption module and the system power supply interface module.
As can be seen from the above description, when the key switch SW1 is pressed, the power source charges the capacitor C5 and the capacitor C6 through the resistor R3 and the resistor R4, one path charges the capacitor C2 and the other path charges the capacitor C4 directly. Because the charging loop of the capacitor C5 and the capacitor C6 is provided with the impedance circuit formed by connecting the resistors R3 and R4 in parallel, the current on the charging loop does not generate large surge current, and the phenomenon that the capacitor C6 generates large surge current in the initial power-on stage due to large capacity in actual use is solved. When the voltage of the capacitor C4 rises to the threshold voltage of the voltage regulator tube D1, the voltage regulator tube D1 is conducted, and the triode Q1 is conducted; the resistor R9 has the function of current limiting and prevents the voltage regulator tube D1 from being burnt; the resistor R10 is used for discharging the charge above the capacitor C4; when the transistor Q1 is conducted, the voltage of the collector of the transistor Q1 is pulled low, so that the MOS transistor Q2 can be conducted; the resistor R5 plays a role in limiting current in a loop and determines the conduction speed of the MOS transistor Q2; when the MOS transistor Q2 is conducted, the input power supply charges the capacitors C5 and C6 through the MOS transistor Q2, and the capacitors C5 and C6 can be quickly filled because the loop only has the conducting internal resistance of the MOS transistor Q2; the capacitor can accelerate the starting time of the system through the charging of the two stages; when the MOS transistor Q2 is turned on, the voltage of the cathode of the diode D2 is higher than the voltage of the anode of the diode D2, and the diode D2 turns off in the reverse direction, so that in the following operation process, the charging currents on the capacitors C5 and C6 all pass through the branch of the MOS transistor Q2, and the main charging current does not pass through the branch formed by the resistors R3 and R4 and the diode D2.
Furthermore, the power supply soft start module further comprises a capacitor C2, one end of the capacitor C2 is electrically connected with the source of the MOS transistor Q2 and the system power supply interface module, and the other end of the capacitor C2 is electrically connected with the other end of the resistor R5.
As can be seen from the above description, the MOS transistor Q2 has a slow turn-on and therefore a high turn-on loss, and requires that the gate-source voltage (using Vgs) waveform of the MOS transistor Q2 cannot oscillate, so that the capacitor C2 is used to change the oscillation condition.
Furthermore, the power supply soft start module further comprises a resistor R6, one end of the resistor R6 is electrically connected with the source of the MOS transistor Q2 and the system power supply interface module, and the other end of the resistor R6 is electrically connected with the other end of the resistor R5.
As can be seen from the above description, the resistance of the resistor R6 plays a role of voltage division in the loop, and is used to limit the gate-source voltage (expressed by Vgs) of the MOS transistor Q2.
Further, the power supply soft start module further comprises a resistor R8, one end of the resistor R8 is electrically connected with the base of the triode Q1 and the anode of the voltage regulator tube D1, respectively, and the other end of the resistor R8 is electrically connected with the emitter of the triode Q1, the resistor R10, the capacitor C4 and the hot plug spike absorption module, respectively.
As can be seen from the above description, the voltage division is performed by providing the resistor R8.
Further, the power supply soft start module further includes a resistor R7 and a capacitor C3, one end of the resistor R7 is electrically connected to the drain of the MOS transistor Q2, the cathode of the diode D2, one end of the capacitor C5, one end of the capacitor C6, and an external motor driving circuit, the other end of the resistor R7 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected to the source of the MOS transistor Q2 and the system power supply interface module.
From the above description, after the absorption is completed by the RC circuit formed by the capacitor C3 and the resistor R7, the spike voltage is effectively suppressed, and the MOS transistor Q2 is protected.
Further, the hot plug spike absorption module comprises a resistor R1, a resistor R2 and a capacitor C1, one end of the resistor R2 is electrically connected with one end of the capacitor C1, the power supply soft start module and the system power supply interface module respectively, the other end of the capacitor C1 is electrically connected with one end of a resistor R1, the other end of the resistor R1 is electrically connected with the other end of the resistor R2 and the power supply soft start module respectively, and the other end of the resistor R1 and the other end of the resistor R2 are grounded.
As can be seen from the above description, by arranging the capacitor C1 in series with the resistor R1 and then in parallel with the resistor R2, the loop can effectively absorb the spike voltage generated during hot swap, thereby protecting the circuit at the later stage.
Further, the system power supply interface module comprises a connector CN1, a first pin of the connector CN1 is grounded, and a second pin of the connector CN1 is electrically connected with the power supply soft start module and the hot plug spike absorption module respectively.
Referring to fig. 1 and fig. 2, a first embodiment of the present invention is:
referring to fig. 1, the power supply soft start circuit with the hot plug function includes a system power supply interface module 1, a hot plug spike absorption module 2 and a power supply soft start module 3, where the power supply soft start module 3 is respectively electrically connected to the hot plug spike absorption module 2 and the system power supply interface module 1, the hot plug spike absorption module 2 is electrically connected to the system power supply interface module 1, and the power supply soft start module 3 is electrically connected to an external motor drive circuit 4.
Referring to fig. 2, the power soft start module 3 includes a resistor R3 (with a resistance value of 82 Ω), a resistor R4 (with a resistance value of 82 Ω), a resistor R5 (with a resistance value of 10k Ω), a resistor R9 (with a resistance value of 1k Ω), a resistor R10 (with a resistance value of 10k Ω), a capacitor C4 (with a capacitance value of 1000 μ F and a voltage value of 50V), a capacitor C5 (with a capacitance value of 100nF and a voltage value of 50V), a capacitor C6 (with a capacitance value of 1000 μ F and a voltage value of 50V), a key switch SW1 (which is a commonly used key switch), a regulator D1 (with a threshold of 12V), a diode D2 (with a model of SS34), a triode Q1 (with a model of S8050), and a MOS transistor Q2 (with a model of VBE 2625);
the base electrode of the triode Q1 is electrically connected with the anode electrode of a voltage regulator tube D1, the cathode electrode of the voltage regulator tube D1 is electrically connected with one end of a resistor R9, the other end of the resistor R9 is respectively electrically connected with one end of a resistor R10, one end of a capacitor C4, one end of a key switch SW1 and the anode electrode of a diode D2, the emitter electrode of the triode Q1 is respectively electrically connected with the other end of a resistor R10, the other end of a capacitor C4 and a hot plug spike absorption module 2, the collector electrode of the triode Q1 is electrically connected with one end of a resistor R5, the other end of the resistor R5 is electrically connected with the gate electrode of a MOS tube Q2, the source electrode of the MOS tube Q2 is electrically connected with a system power supply interface module 1, the drain electrode of the MOS tube Q2 is respectively electrically connected with the cathode electrode of a diode D2, one end of a capacitor C5, one end of a capacitor C6 and an external motor driving circuit 4, the other end of the capacitor C5 is electrically connected with, the other end of the key switch SW1 is respectively electrically connected with one end of a resistor R3 and the other end of a resistor R4, and the other end of the resistor R3 is respectively electrically connected with the other end of a resistor R4, the hot plug spike absorption module 2 and the system power supply interface module 1.
Referring to fig. 2, the power soft start module 3 further includes a capacitor C2 (with a capacitance of 10nF and a voltage value of 50V), one end of the capacitor C2 is electrically connected to the source of the MOS transistor Q2 and the system power supply interface module 1, and the other end of the capacitor C2 is electrically connected to the other end of the resistor R5.
Referring to fig. 2, the power soft start module 3 further includes a resistor R6 (with a resistance value of 10k Ω), one end of the resistor R6 is electrically connected to the source of the MOS transistor Q2 and the system power supply interface module 1, and the other end of the resistor R6 is electrically connected to the other end of the resistor R5.
Referring to fig. 2, the power soft start module 3 further includes a resistor R8 (with a resistance value of 1k Ω), one end of the resistor R8 is electrically connected to the base of the transistor Q1 and the anode of the voltage regulator D1, and the other end of the resistor R8 is electrically connected to the emitter of the transistor Q1, the resistor R10, the capacitor C4, and the hot swap spike absorption module 2.
Referring to fig. 2, the power soft start module 3 further includes a resistor R7 (with a resistance value of 10 Ω) and a capacitor C3 (with a capacitance value of 10nF and a voltage value of 100V), one end of the resistor R7 is electrically connected to the drain of the MOS transistor Q2, the cathode of the diode D2, one end of the capacitor C5, one end of the capacitor C6, and the peripheral motor driving circuit 4, the other end of the resistor R7 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected to the source of the MOS transistor Q2 and the system power supply interface module 1.
Referring to fig. 2, the hot swap spike absorption module 2 includes a resistor R1 (with a resistance value of 10 Ω), a resistor R2 (with a resistance value of 200k Ω), and a capacitor C1 (with a capacitance value of 10nF and a voltage value of 50V), one end of the resistor R2 is electrically connected to one end of the capacitor C1, the power soft start module 3, and the system power supply interface module 1, the other end of the capacitor C1 is electrically connected to one end of the resistor R1, the other end of the resistor R1 is electrically connected to the other end of the resistor R2 and the power soft start module 3, and the other end of the resistor R1 and the other end of the resistor R2 are both grounded.
Referring to fig. 2, the system power supply interface module 1 includes a connector CN1, a first pin of the connector CN1 is grounded, and a second pin of the connector CN1 is electrically connected to the power soft start module 3 and the hot plug spike absorption module 2, respectively.
The motor driving circuit 4 comprises a driving chip, the type of the driving chip is YTX2136S, the motor driving circuit 4 is externally connected with a driving motor, and Hall feedback exists between the driving motor and the motor driving circuit.
The working principle of the power supply soft start circuit with the hot plug function is as follows:
in the process of hot plug of the system, because higher inductive reactance or capacitive reactance exists in the circuit, larger peak voltage can be generated at the moment, the MOS transistor Q2 can be damaged by long-time hot plug, and after the absorption of the RC circuit formed by the capacitor C3 and the resistor R7 is finished, the peak voltage is effectively inhibited, so that the MOS transistor Q2 is protected; in order to prevent the peak voltage from influencing the rear-stage circuit through the resistor R3 and the resistor R4, the capacitor C1 is arranged to be connected in series with the resistor R1 and then connected in parallel with the resistor R2, and the circuit can effectively absorb the peak voltage generated in the hot plugging process, so that the rear-stage circuit is protected.
When a power supply is powered on through the system power supply interface module 1, after spike voltage generated at the moment of power-on is absorbed by the capacitor C1, the resistor R1 and the resistor R2, the power supply voltage tends to be stable; after the key switch SW1 is pressed, the power supply charges the capacitor C5 and the capacitor C6 through the resistor R3 and the resistor R4 through the diode D2 in one path, and the capacitor C4 is directly charged in the other path. Because the charging loop of the capacitor C5 and the capacitor C6 is provided with the impedance circuit formed by connecting the resistors R3 and R4 in parallel, the current on the charging loop does not generate large surge current, and the phenomenon that the capacitor C6 generates large surge current in the initial power-on stage due to large capacity in actual use is solved. When the voltage of the capacitor C4 rises to the threshold voltage of the voltage regulator tube D1, the voltage regulator tube D1 is conducted, and the triode Q1 is conducted; the resistor R9 has the function of current limiting and prevents the voltage regulator tube D1 from being burnt; the resistor R10 is used for discharging the charge above the capacitor C4; the resistor R8 acts as a voltage divider. When the transistor Q1 is conducted, the voltage of the collector of the transistor Q1 is pulled low, so that the MOS transistor Q2 can be conducted; the resistor R5 plays a role in limiting current in a loop and determines the conduction speed of the MOS transistor Q2; the resistance value of the resistor R6 plays a role of voltage division in a loop and is used for limiting the gate-source voltage (expressed by Vgs) of the MOS transistor Q2; the MOS transistor Q2 has high turn-on loss due to slow turn-on, and requires that the Vgs waveform of the MOS transistor Q2 cannot oscillate, so that the oscillation condition is changed by adopting a capacitor C2; when the MOS transistor Q2 is conducted, the input power supply charges the capacitors C5 and C6 through the MOS transistor Q2, and the capacitors C5 and C6 can be quickly filled because the loop only has the conducting internal resistance of the MOS transistor Q2; the capacitor can accelerate the starting time of the system through the charging of the two stages; when the MOS transistor Q2 is turned on, the voltage of the cathode of the diode D2 is higher than the voltage of the anode of the diode D2, and the diode D2 turns off in the reverse direction, so that in the following operation process, the charging currents on the capacitors C5 and C6 all pass through the branch of the MOS transistor Q2, and the main charging current does not pass through the branch formed by the resistors R3 and R4 and the diode D2.
The power supply soft start circuit with the hot plug function can suppress surge current in the initial power-on stage in a high-power motor control circuit, and the impedance of a charging loop is reduced to a reasonable range in the normal working process; when the system is subjected to hot plugging, the peak voltage generated in the hot plugging process is reduced to a safe range through the suppression and absorption circuit, and the system is not influenced; in the charging process of the system power supply, the capacitor C5 and the capacitor C6 are charged with small current firstly, and then charged with large current when the voltage on the capacitor reaches a certain voltage value, so that the surge current in the initial power-on stage can be fundamentally inhibited, and the starting-up time of the system can be shortened.
The circuit designed by the scheme can enable the system to work in an initial power-on stage and a normal working state, and the impedance of a system charging loop is large in the initial power-on stage, so that surge current can be inhibited; during normal operation, the impedance of the system charging loop is reduced without affecting the power consumption of the system.
In summary, according to the power soft start circuit with the hot plug function provided by the invention, by arranging the power soft start module and the system power supply interface module, at the initial power-on stage of the system, the suppression of the surge current is achieved through the impedance of the system, and meanwhile, when the system normally works, the impedance of the system can be reduced to a reasonable range, so that the power consumption of the system is not consumed; by arranging the hot plug peak absorption module, the influence of higher peak voltage on the system can be avoided when the system is hot plugged, and the components of the system are protected; the power supply soft start circuit with the hot plug function can be applied to high-power supply systems, such as air conditioners, washing machines, industrial fans, electric vehicles and other fields, and the reliability and the service life of products can be improved through the circuit designed by the scheme.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a take power soft start circuit of hot plug function which characterized in that, absorbs module and power soft start module including system power supply interface module, hot plug spike, power soft start module absorbs module and system power supply interface module electricity with the hot plug spike respectively and is connected, the hot plug spike absorbs the module and is connected with system power supply interface module electricity, power soft start module is connected with the motor drive circuit electricity of peripheral hardware.
2. The power supply soft start circuit with the hot plug function according to claim 1, wherein the power supply soft start module comprises a resistor R3, a resistor R4, a resistor R5, a resistor R9, a resistor R10, a capacitor C4, a capacitor C5, a capacitor C6, a key switch SW1, a voltage regulator D1, a diode D2, a triode Q1 and a MOS tube Q2;
the base electrode of the triode Q1 is electrically connected with the anode of a voltage regulator tube D1, the cathode of the voltage regulator tube D1 is electrically connected with one end of a resistor R9, the other end of the resistor R9 is respectively electrically connected with one end of a resistor R10, one end of a capacitor C4, one end of a key switch SW1 and the anode of a diode D2, the emitter of the triode Q1 is respectively electrically connected with the other end of a resistor R10, the other end of a capacitor C4 and a hot plug spike absorption module, the collector of the triode Q1 is electrically connected with one end of a resistor R5, the other end of the resistor R5 is electrically connected with the gate of a MOS tube Q2, the source electrode of the MOS tube Q2 is electrically connected with a system power supply interface module, the source electrode of the MOS tube Q2 is respectively electrically connected with the cathode of a diode D2, one end of a capacitor C5, one end of a capacitor C6 and an external motor driving circuit, the other end of the capacitor C5 is electrically connected with the other end of a capacitor C, the other end of the key switch SW1 is respectively electrically connected with one end of a resistor R3 and the other end of a resistor R4, and the other end of the resistor R3 is respectively electrically connected with the other end of a resistor R4, the hot plug spike absorption module and the system power supply interface module.
3. The power supply soft start circuit with hot swap function according to claim 2, wherein the power supply soft start module further comprises a capacitor C2, one end of the capacitor C2 is electrically connected to the source of the MOS transistor Q2 and the system power interface module, and the other end of the capacitor C2 is electrically connected to the other end of the resistor R5.
4. The power soft start circuit with hot plug function of claim 2, wherein the power soft start module further comprises a resistor R6, one end of the resistor R6 is electrically connected to the source of the MOS transistor Q2 and the system power interface module, respectively, and the other end of the resistor R6 is electrically connected to the other end of the resistor R5.
5. The power supply soft start circuit with the hot swap function according to claim 2, wherein the power supply soft start module further comprises a resistor R8, one end of the resistor R8 is electrically connected to the base of the transistor Q1 and the anode of the voltage regulator D1, respectively, and the other end of the resistor R8 is electrically connected to the emitter of the transistor Q1, the resistor R10, the capacitor C4 and the hot swap spike absorption module, respectively.
6. The power supply soft start circuit with the hot plug function according to claim 2, wherein the power supply soft start module further comprises a resistor R7 and a capacitor C3, one end of the resistor R7 is electrically connected to the drain of the MOS transistor Q2, the cathode of the diode D2, one end of the capacitor C5, one end of the capacitor C6 and the peripheral motor driving circuit, the other end of the resistor R7 is electrically connected to one end of the capacitor C3, and the other end of the capacitor C3 is electrically connected to the source of the MOS transistor Q2 and the system power supply interface module.
7. The power supply soft start circuit with the hot plug function according to claim 1, wherein the hot plug spike absorption module comprises a resistor R1 and a capacitor C1 of a resistor R2, one end of the resistor R2 is electrically connected with one end of the capacitor C1, the power supply soft start module and the system power supply interface module respectively, the other end of the capacitor C1 is electrically connected with one end of a resistor R1, the other end of the resistor R1 is electrically connected with the other end of the resistor R2 and the power supply soft start module respectively, and the other end of the resistor R1 and the other end of the resistor R2 are both grounded.
8. The power supply soft start circuit with hot plug function according to claim 1, wherein the system power supply interface module comprises a connector CN1, a first pin of the connector CN1 is grounded, and a second pin of the connector CN1 is electrically connected to the power supply soft start module and the hot plug spike absorbing module, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072362.3A CN112104219A (en) | 2020-10-09 | 2020-10-09 | Take power soft start circuit of hot plug function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072362.3A CN112104219A (en) | 2020-10-09 | 2020-10-09 | Take power soft start circuit of hot plug function |
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| CN112104219A true CN112104219A (en) | 2020-12-18 |
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| CN202011072362.3A Pending CN112104219A (en) | 2020-10-09 | 2020-10-09 | Take power soft start circuit of hot plug function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640664A (en) * | 2021-07-29 | 2021-11-12 | 湖州越球电机有限公司 | BLDC motor soft start test system with DC voltage input |
| CN115242070A (en) * | 2022-07-25 | 2022-10-25 | 海信（广东）空调有限公司 | Air conditioner power control circuit and air conditioner |
-
2020
- 2020-10-09 CN CN202011072362.3A patent/CN112104219A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640664A (en) * | 2021-07-29 | 2021-11-12 | 湖州越球电机有限公司 | BLDC motor soft start test system with DC voltage input |
| CN113640664B (en) * | 2021-07-29 | 2024-04-02 | 湖州越球电机有限公司 | BLDC motor soft start test system with direct-current voltage input |
| CN115242070A (en) * | 2022-07-25 | 2022-10-25 | 海信（广东）空调有限公司 | Air conditioner power control circuit and air conditioner |
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