CN106532631A - N-MOS (N-channel Metal Oxide Semiconductor) high-side bootstrap driving current-limiting protection circuit for spaceflight - Google Patents
N-MOS (N-channel Metal Oxide Semiconductor) high-side bootstrap driving current-limiting protection circuit for spaceflight Download PDFInfo
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- CN106532631A CN106532631A CN201611030067.5A CN201611030067A CN106532631A CN 106532631 A CN106532631 A CN 106532631A CN 201611030067 A CN201611030067 A CN 201611030067A CN 106532631 A CN106532631 A CN 106532631A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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Abstract
The invention provides an N-MOS (N-channel Metal Oxide Semiconductor) high-side bootstrap driving current-limiting protection circuit for a spaceflight. The N-MOS high-side bootstrap driving current-limiting protection circuit comprises an undervoltage protection circuit, an auxiliary power supply circuit, a constant-current current-limiting circuit, a bootstrap power supply circuit and an on-off and delay switch-off circuit, wherein the undervoltage protection circuit is connected with the auxiliary power supply circuit, the auxiliary power supply circuit is connected with the constant-current current-limiting circuit, the constant-current current-limiting circuit is connected with the bootstrap power supply circuit and the on-off and delay switch-off circuit respectively, and the bootstrap power supply circuit is connected with the on-off and delay switch-off circuit. The N-MOS high-side bootstrap driving current-limiting protection circuit has the beneficial effects that the high-side bootstrap driving current-limiting protection circuit is a solution scheme of substituting a current spacecraft fuse and relay power supply and distribution system, meanwhile, the circuit has an overcurrent and short-circuit protection function which can be recovered and used repeatedly, is a key product for building an automatic health condition monitoring and automatic management satellite platform for power supply and distribution of the spaceflight and can be used for various satellite spargers, platforms and primary bus protection devices of various electronic single machines in loads.
Description
Technical field
A kind of the present invention relates to electronic technology field, more particularly to space flight N-MOS flash bootstrapping driving current-limiting protection electricity
Road.
Background technology
With the increase of spacecraft platform power demand, the power supply buses voltage of spacecraft by traditional 28V, 42V gradually
270V to 100V voltage even more highs is excessive.For the high voltage dc bus of more than 100V, with the tradition of relay+fuse
Distribution and protected mode have increasingly shown its scheme defect.First, high-voltage relay technique realize it is few compared with difficult, species,
The hidden danger of intrinsic mechanical contact Arcing is there is in use；Simultaneously traditional mechanical touches that relay volume is big, mechanical
Can be poor, reliability is low.It is low that fuse has an overcurrent protection value precision, and overload and short trouble fuse can not be extensive after blowing
The shortcomings of important parameter I2t ground testability in multiple, fuse blows performance is poor.
Dedicated control circuit is equipped with using solid crystals tube device to realize substituting the tradition of relay+fuse completely
For power distribution mode.When from MOSFET as power switch, as the manufacturing process of P-MOS devices determines its conducting resistance
The big inherent defect of the high heat consumption that causes greatly, the road loss of voltage of distribution is no longer suitable in high-power confession distribution occasion.
The content of the invention
The invention provides a kind of space flight with N-MOS flash bootstrapping drive current-limiting protection circuit, including under-voltage protecting circuit,
Auxiliary power supply circuit, constant current current-limiting circuit, bootstrapping power supply circuits, switching on and shutting down and time delayed turn-off circuit, the under-voltage protecting circuit
It is connected with the auxiliary power supply circuit, the auxiliary power supply circuit is connected with the constant current current-limiting circuit, the constant current current limliting electricity
Road is connected with the bootstrapping power supply circuits and the switching on and shutting down and time delayed turn-off circuit respectively, it is described boot power supply circuits with it is described
Switching on and shutting down and time delayed turn-off circuit are connected.
Used as further improvement of the invention, the under-voltage protecting circuit includes resistance R7, resistance R8, resistance R14, resistance
R*4, resistance R*7, electric capacity C3, Zener diode V12, audion V13, audion V15, described resistance R7 one end connects once
Bus input, the resistance R7 other ends are connected with described electric capacity C3 one end and described resistance R14 one end respectively, resistance R*7
One end is connected with the Zener diode V12 anodes and audion V15 base stages respectively, resistance R*4 one end and two pole of the voltage stabilizing
Pipe V12 negative electrodes are connected, and the resistance R*4 other ends are connected with the audion V13 colelctor electrodes, and the connection of resistance R8 one end is once female
Line, resistance R8 other ends difference connecting triode V15 colelctor electrodes and audion V13 base stages, audion V13 colelctor electrodes are supplied with auxiliary
Circuit is connected, the resistance R*7 other ends ground connection, the audion V15 grounded emitters, the audion V13 emitter stages
Ground connection.
Used as further improvement of the invention, the auxiliary power supply circuit includes Zener diode V16, resistance R9, resistance
R10, audion V11, electric capacity C6, electric capacity C13, the resistance R9 are composed in series to Zener diode V16's with the electric capacity C13
RC wave filter, the Zener diode V16 are connected with audion V11 base stages, audion V11 colelctor electrodes and the resistance R10 phases
Even, the electric capacity C6 connects the audion V11 emitter stages.
As further improvement of the invention, the audion V13 colelctor electrodes and the Zener diode V16 negative electrode phases
Even.
Used as further improvement of the invention, the constant current current-limiting circuit includes N-channel MOS FET transistor V1, N-channel
Mosfet transistor V4, resistance R17, resistance R18, resistance R1, resistance R49, resistance R3, resistance R4, resistance R20, resistance R21,
Resistance R22, resistance R13, resistance R*6, electric capacity C1, electric capacity C16, Zener diode V3, audion V5, audion V7, the N ditches
Road mosfet transistor V1 and the N-channel MOS FET transistor V4 are in parallel, N-channel MOS FET transistor V1 and the N-channel
The D poles of mosfet transistor V4, S poles are connected with each other, the N-channel MOS FET transistor V1 and N-channel MOS FET transistor V4
Grid difference series resistance R17, resistance R18；Resistance R1 is connected on N-channel as the current sampling resistor of loop of power circuit
The S poles of mosfet transistor V1, V4 and a bus outfan VOUT, resistance R49 is used as N-channel MOS FET transistor V1, V4
Leakage current bleeder resistance one end during shut-off is connected to VOUT ends, resistance R49 other ends ground connection；Resistance R3, resistance R4 one end point
It is not connected with the two ends of resistance R1, for arranging mirror current source cut-off current, resistance R3, the resistance R4 other ends connect respectively to three
Two colelctor electrodes of pole pipe V7, flying capcitor C1 therebetween, for the filtering of difference sampling end；Resistance R20, resistance R21 connect respectively
Connect two colelctor electrodes of audion V7, for arranging the quiescent point of mirror current source, one of them base stage to audion
With the shorted on one end of resistance R21, mirror current source is set and is in critical linear zone；Zener diode V3 is connected to VOUT ends and electricity
Resistance R22 one end, the running voltage of stable mirror current source, electric capacity C16 is composed in series RC wave filter with resistance R22, for voltage stabilizing
The filtering of tube voltage, while resistance R22 also functions to determine the effect of mirror current source quiescent point；Audion V5 emitter stages connect
In the S poles of N-channel MOS FET transistor V1, V4, audion V5 colelctor electrodes are connected on the grid of N-channel MOS FET transistor V1, V4
Current-limiting resistance R17, R18 one end, audion V5 colelctor electrodes are connected with resistance R*6, and audion V5, resistance R*6 are jointly by mirror image electricity
Stream source feedback control, controls the GS voltages of N-channel MOS FET transistor V1, V4, is allowed to be operated in linear zone；Resistance R13 distinguishes
Connecting triode V5 base stages and resistance R20 one end, audion V5 base drive current-limiting resistances.
Improve as of the invention further, the bootstrapping power supply circuits include NPN triode V18, PNP triode V20,
Electric capacity C*3, storage capacitor C*4, electric capacity C*5, electric capacity C15, resistance R*8, resistance R29, resistance R*11, switching diode V17, open
Close diode V21, NAND gate D1C, NAND gate D1D, NPN triode V18 and PNP triode V20 emitter stage connection composition totem
Post drive circuit, PNP triode V20 grounded collector, NPN triode V18 colelctor electrode connect series voltage stabilizing output triode V11's
Emitter stage Vcc, resistance R29 are connected on NPN triode V18 emitter stage as one end of totem pole output current limiting resistance, and resistance R29 is another
End is connected with electric capacity C*3 one end, and the electric capacity C*3 other ends connect switching diode V17 anodes and switching diode V21 negative electrodes respectively,
Switching diode V17 negative electrodes and switching diode V21 anodes two ends connect storage capacitor C*4 two ends respectively；Electric capacity C*3, switch
Diode V17, switching diode V21 and storage capacitor C*4 combinations, are two MOSFET of N-channel MOS FET transistor V1, V4
G, S control circuit provides bootstrapping power supply；NAND gate D1C 9 feet connection electric capacity C*5 and resistance R*8, constitute it is typical from
10 feet of resonant oscillator, wherein D1C are connected with resistance R*8 one end；12 feet of NAND gate D1D, 13 feet connect and compose inverse gate
Output, the RC wave filter of the 11 feet connection resistance R*11 and electric capacity C15 compositions of reverse swing door output D1D, wave filter output is used as figure
Rise the input of post circuit.
Further improve as of the invention, the switching on and shutting down and time delayed turn-off circuit include audion V28, audion
V22, audion V9, audion V19, audion V26, switching diode V27, resistance R35, resistance R37, resistance R41, resistance
It is R30, resistance R38, resistance R44, resistance R43, resistance R45, resistance R39, resistance R31, electric capacity C7, electric capacity C*6, electric capacity C9, steady
Pressure pipe V2, electric capacity C12, resistance R44, audion V28, audion V22, audion V24, resistance R37, resistance R41 composition typical case
Self-locking circuit, resistance R37 connects B, E interpolar of V28, and resistance R41 is connected to B, E interpolar of audion V22；Electric capacity C7 with
Resistance R37 is in parallel, and electric capacity C*6 is in parallel with resistance R41, strobes；Resistance R30 and electric capacity C9 composition RC filtering, to outside
High level start-up command TC_ON_OFF of input is filtered；Resistance R19 is connected with stabilivolt V2 to N-channel MOS FET crystal
The GS voltages of pipe V1, V4 are sampled, and stabilivolt V2 anodes connect VOUT_1 ends, and stabilivolt V2 negative electrodes connect audion V9 base stages；Electricity
Resistance R38, resistance R44 series connection are simultaneously connected with audion V9 colelctor electrodes, and resistance R44 one end is connected by resistance R43, resistance R45 again
The switching of audion V24 is controlled after partial pressure；Electric capacity C12 is in parallel with resistance R44, and voltage on resistance R44 is filtered；Three poles
Pipe V19 base stages are controlled by the high level of start-up command TC_ON_OFF, and switching diode V27, Jing that TC_ON_OFF is concatenated is electric
Resistance R39 and resistance R31 series connection partial pressures, audion V26 colelctor electrodes are connected with resistance R35, resistance R35 one end connection NAND gate circuit
8 feet of D1C, control resonating circuit whether starting of oscillation.
Used as further improvement of the invention, space flight N-MOS flash bootstrapping drives current-limiting protection circuit also to include electricity
Stream telemetric circuit, the telemetering of current circuit include PNP to audion V8, PNP triode V10, electric capacity C10, electric capacity C14, steady
Pressure pipe V14, resistance R23, resistance R24, resistance R46, electric capacity C2, resistance R5, R6, resistance R*5, resistance R46 are connected with electric capacity C14
RC filtering, electric capacity C14 connection stabilivolt V14 two ends are provided for stabilivolt V14；Resistance R23, resistance R24 are set for mirror current source
Quiescent point is put, resistance R23 and resistance R24 one end connect PNP respectively to two colelctor electrodes of audion V8, resistance R23 and electricity
The resistance R24 other ends are connected with resistance R46；Resistance R5, R6 one end bridges the two ends of sampling resistor R1 respectively, and PNP triode V10 is made
For image current source output terminal, PNP triode V10 emitter stage is connected to one end of resistance R5, and PNP triode V10 colelctor electrode connects
Resistance R*5 one end is connected on, resistance R48 and electric capacity C10 constitutes the RC filtering of remote measurement output circuit.
The invention has the beneficial effects as follows：The present invention is the solution for substituting current spacecraft fuse+relay for distribution system
Certainly scheme, meanwhile, circuit have can recover, reusable excessively stream and short-circuit protection function, be build spacecraft for distribution from
The critical product of main health status monitoring, autonomous management satellite platform.Can be used in distributor, platform and the load of all kinds of satellites
Busbar protective device of various electronics units.
Description of the drawings
Fig. 1 is the telemetering of current circuit diagram of the present invention.
Fig. 2 is the Part I of the circuit diagram of the present invention.
Fig. 3 is the Part II of the circuit diagram of the present invention.
Fig. 4 is the Part III of the circuit diagram of the present invention.
Fig. 5 is the Part IV of the circuit diagram of the present invention.
Fig. 6 is the Part V of the circuit diagram of the present invention.
Fig. 7 is current limliting time delayed turn-off measured waveform figure (ch1 is electric current, and ch2 is gate pole).
Specific embodiment
As shown in figures 2-6, the invention discloses a kind of space flight drives current-limiting protection circuit with the bootstrapping of N-MOS flash, including
Under-voltage protecting circuit, auxiliary power supply circuit, constant current current-limiting circuit, bootstrapping power supply circuits, switching on and shutting down and time delayed turn-off circuit, it is described
Under-voltage protecting circuit is connected with the auxiliary power supply circuit, and the auxiliary power supply circuit is connected with the constant current current-limiting circuit, institute
State constant current current-limiting circuit to be connected with the bootstrapping power supply circuits and the switching on and shutting down and time delayed turn-off circuit respectively, the bootstrapping is supplied
Circuit is connected with the switching on and shutting down and time delayed turn-off circuit.
Because the circuit diagram of the present invention it is excessive, so the circuit diagram is split as five parts shown in Fig. 2-6, wherein, by even
Contact represents connection, and for example, the A1 junction points in Fig. 2 are attached with the A1 junction points in Fig. 5.
The under-voltage protecting circuit include resistance R7, resistance R8, resistance R14, resistance R*4, it is resistance R*7, electric capacity C3, steady
Pressure diode V12, audion V13, audion V15, described resistance R7 one end connect a bus input, and the resistance R7 is another
One end is connected with described electric capacity C3 one end and described resistance R14 one end respectively；Described resistance R7 one end connects a bus input
End, the resistance R7 other ends connect electric capacity C3, constitute pole RC low pass filters；Resistance R7 is connected with resistance R14, is jointly
Zener diode V12 arranges static working current；Resistance R*7 one end respectively with the Zener diode V12 anodes and audion
V15 base stages are connected, and the electric current of Zener diode V12 flows through resistance R*7 control audions V15 whether saturation conductions；Resistance R*4 mono-
End is connected with the Zener diode V12 negative electrodes, and the resistance R*4 other ends are connected with the audion V13 colelctor electrodes, make one
, in various process from low to high and from high to low, the sense of current for flowing through R*4 is contrary for secondary bus " Power " voltage so that
Under-voltage protecting circuit has hysteretic characteristic；Resistance R8 one end connects a bus, resistance R8 other ends difference connecting triode V15
Colelctor electrode and audion V13 base stages, audion V13 colelctor electrodes connection Zener diode V16 negative electrodes, control V16 whether voltage stabilizings.
The auxiliary power supply circuit includes Zener diode V16, resistance R9, resistance R10, audion V11, electric capacity C6, electricity
Hold C13, the resistance R9 is composed in series the RC wave filter to Zener diode V16, the Zener diode with the electric capacity C13
V16 is connected with audion V11 base stages, used as the reference voltage of series voltage stabilizing power supply circuits, audion V11 colelctor electrodes and the electricity
Resistance R10 is connected, and arranges the quiescent point of mu balanced circuit, and the electric capacity C6 connects the audion V11 emitter stages, used as power supply
Voltage filter.
The constant current current-limiting circuit include N-channel MOS FET transistor V1, N-channel MOS FET transistor V4, resistance R17,
Resistance R18, resistance R1, resistance R49, resistance R3, resistance R4, resistance R20, resistance R21, resistance R22, resistance R13, resistance R*6,
Electric capacity C1, electric capacity C16, Zener diode V3, audion V5, audion V7, the N-channel MOS FET transistor V1 and N
Channel MOSFET transistors V4 is in parallel, the D poles of N-channel MOS FET transistor V1 and the N-channel MOS FET transistor V4, S poles
It is connected with each other, grid difference series resistance R17 of N-channel MOS FET transistor V1 and the N-channel MOS FET transistor V4, electricity
Resistance R18；Resistance R1 as loop of power circuit current sampling resistor be connected on the S poles of N-channel MOS FET transistor V1, V4 with once
Leakage current bleeder resistance one end when bus outfan VOUT, resistance R49 are turned off as N-channel MOS FET transistor V1, V4 connects
It is connected on VOUT ends, resistance R49 other ends ground connection；Resistance R3, resistance R4 one end are connected with the two ends of resistance R1 respectively, for arranging
Mirror current source cut-off current, resistance R3, the resistance R4 other ends connect two colelctor electrodes to audion V7 respectively, bridge electricity therebetween
Hold C1, for the filtering of difference sampling end；Resistance R20, resistance R21 distinguish two colelctor electrodes of connecting triode V7, for setting
The quiescent point of mirror current source is put, the shorted on one end of one of them base stage to audion and resistance R21 arranges mirror image electricity
Stream source is in critical linear zone；Zener diode V3 is connected to VOUT ends and resistance R22 one end, the work of stable mirror current source
Voltage, electric capacity C16 are composed in series RC wave filter with resistance R22, for the filtering of voltage stabilizing tube voltage, while resistance R22 is also functioned to
Determine the effect of mirror current source quiescent point；Audion V5 emitter stages are connected on the S poles of N-channel MOS FET transistor V1, V4,
Audion V5 colelctor electrodes are connected on grid current-limiting resistance R17, R18 one end of N-channel MOS FET transistor V1, V4, audion V5 collection
Electrode is connected with resistance R*6, and audion V5, resistance R*6 receive mirror current source feedback control jointly, and N-channel MOS FET is brilliant for control
The GS voltages of body pipe V1, V4, are allowed to be operated in linear zone；Resistance R13 distinguishes connecting triode V5 base stages and resistance R20 one end,
Audion V5 base drive current-limiting resistances.
The bootstrapping power supply circuits include NPN triode V18, PNP triode V20, electric capacity C*3, storage capacitor C*4, electricity
Hold C*5, electric capacity C15, resistance R*8, resistance R29, resistance R*11, switching diode V17, switching diode V21, NAND gate D1C,
NAND gate D1D, NPN triode V18 and PNP triode V20 emitter stage connection composition totem pole drive circuit, PNP triode V20
Grounded collector, NPN triode V18 colelctor electrode meet the emitter stage Vcc of series voltage stabilizing output triode V11, and resistance R29 is used as figure
Rise one end of post output current limiting resistance and be connected on NPN triode V18 emitter stage, the resistance R29 other ends are connected with electric capacity C*3 one end, electricity
Hold the C*3 other ends and connect switching diode V17 anodes and switching diode V21 negative electrodes, switching diode V17 negative electrodes and switch respectively
Diode V21 anodes two ends connect storage capacitor C*4 two ends respectively；Electric capacity C*3, switching diode V17, switching diode V21
Combine with storage capacitor C*4, G, S control circuit for N-channel MOS FET transistor two MOSFET of V1, V4 provides bootstrapping power supply
Power supply；The 9 feet connection electric capacity C*5 and resistance R*8 of NAND gate D1C, constitutes typical self-resonance agitator, and wherein the 10 of D1C
Foot is connected with resistance R*8 one end；12 feet of NAND gate D1D, 13 feet connect and compose inverse gate output, and reverse swing door exports the 11 of D1D
Foot connects the RC wave filter that resistance R*11 and electric capacity C15 are constituted, and wave filter exports the input as totem-pote circuit, i.e. V18 with
The base stage of V20.
The switching on and shutting down and time delayed turn-off circuit include audion V28, audion V22, audion V9, audion V19, three
Pole pipe V26, switching diode V27, resistance R35, resistance R37, resistance R41, resistance R30, resistance R38, resistance R44, resistance
R43, resistance R45, resistance R39, resistance R31, electric capacity C7, electric capacity C*6, electric capacity C9, stabilivolt V2, electric capacity C12, resistance R44,
Audion V28, audion V22, audion V24, resistance R37, resistance R41 constitute typical self-locking circuit, resistance R37 connections
B, E interpolar of V28, resistance R41 are connected to B, E interpolar of audion V22；Electric capacity C7 is in parallel with resistance R37, electric capacity C*6 with electricity
R41 is in parallel for resistance, strobes；Resistance R30 and electric capacity C9 composition RC filtering, high level start-up command TC_ to outside input
ON_OFF is filtered；Resistance R19 GS voltages to N-channel MOS FET transistor V1, V4 of being connected with stabilivolt V2 are sampled,
Stabilivolt V2 anodes connect VOUT_1 ends, and stabilivolt V2 negative electrodes connect audion V9 base stages；Once generation is transshipped, between GS, voltage reduces,
Then stabilivolt V2 be not operated in voltage stabilizing state, and the pressure reduction control V9 of the resistance R19 extremely in parallel with B, E of V9 is turned off, resistance
R38, resistance R44 are connected and are connected with audion V9 colelctor electrodes, and resistance R44 one end is again by resistance R43, resistance R45 series connection point
The switching of audion V24 is controlled after pressure；Electric capacity C12 is in parallel with resistance R44, and voltage on resistance R44 is filtered；Audion
V19 base stages are controlled by the high level of start-up command TC_ON_OFF, switching diode V27, Jing resistance that TC_ON_OFF is concatenated
R39 and resistance R31 series connection partial pressures, are sent the base stage of audion V19, are gone here and there by resistance R26, R25 between the colelctor electrode of audion and VCC
Connection partial pressure, controls the conducting and shut-off of PNP triode V26, and audion V26 colelctor electrodes are connected with resistance R35, resistance R35 one end
8 feet of connection NAND gate circuit D1C, control resonating circuit whether starting of oscillation.
As shown in figure 1, space flight N-MOS flash bootstrapping drives current-limiting protection circuit also to include telemetering of current circuit, institute
Stating telemetering of current circuit includes PNP to audion V8, PNP triode V10, electric capacity C10, electric capacity C14, stabilivolt V14, resistance
R23, resistance R24, resistance R46, electric capacity C2, resistance R5, R6, resistance R*5, with PNP to audion V8 as core, constitute low-power consumption
Telemetering of current circuit, wherein resistance R46 connect with electric capacity C14 for stabilivolt V14 provide RC filtering, electric capacity C14 connection voltage stabilizing
Pipe V14 two ends；Resistance R23, resistance R24 are that mirror current source arranges quiescent point, resistance R23 and resistance R24 one end difference
Connection PNP is connected with resistance R46 to two colelctor electrodes of audion V8, resistance R23 and the resistance R24 other ends；Electric capacity C2 is to three
The mirror current source of pole pipe composition carries out the increasing that the resistance value ratio of input filter, resistance R5, R6 and resistance R*5 determines telemetric circuit
Benefit.Wherein resistance R5, R6 one end bridges the two ends of sampling resistor R1 respectively, and PNP triode V10 is exported as mirror current source
End, PNP triode V10 emitter stage are connected to one end of resistance R5, and PNP triode V10 colelctor electrode is connected to resistance R*5 one end,
Resistance R48 and electric capacity C10 constitutes the RC filtering of remote measurement output circuit.
As the definition of following table leading point labelling is：
| Exit sequence number | Symbol | Function | Function introduction |
| 1 | TC_ON_OFF | Start, shutdown command end | Start, shutdown command input |
| 2 | POWER | Bus input | Bus is input into |
| 3 | VOUT | Bus outfan | Bus is exported |
| 4 | I_TM | Current sample outfan | Output current remote measurement |
Below the function of the circuit is specifically described：
1. under-voltage protecting circuit：
As shown in figure 1, this circuit is the under-voltage protecting circuit for having hysteresis function, under-voltage protection is set and voltage reaches thresholding
Output can be recovered automatically after magnitude of voltage.During normal work, the upper voltages of R*7 turn on V15, and V13 cut-offs, protection signal are height, line
Property source circuit normal work；During under-voltage protection, when input voltage is reduced to a certain extent, cause the partial pressure of R*7 less than V15's
During base stage threshold voltage, V15 is changed into cut-off from conducting, and V13 conductings make protection signal step-down, linear source circuit quit work；Rise
When pressure is recovered, when input voltage gradually rises, until when the partial pressure value of R*7 is higher than the base stage threshold voltage of V15, making again V15
Conducting, V13 cut-offs, protection signal are height, and circuit returns to unprotected front state, linear sources normal circuit operation.
Under-voltage value can be adjusted by adjusting resistance R*7 and resistance R*4.Return voltage Vh is claimed in side circuit：73
±5V；Under-voltage protection voltage Vl=65 ± 5V.
In under-voltage protecting circuit, parameter is calculated as follows：
a.
b.
In formula：Vz is stabilivolt voltage stabilizing value, takes 6.5V；
Vbe is audion saturation conduction voltage threshold, takes 0.6V；
R7 takes 10K；R14 takes 240K；Vl takes 65V；Vh takes 73V.
R*4=406.5K, R*7=2.437K is calculated, R*4=390K, R*7=2.4K is actually taken
Recalculate under-voltage protection value Vh and Vl.Obtain Vh=74.15V, Vl=65.81V.
2. auxiliary power supply circuit：
Linear power supply as shown in figure 1, linear power supply can provide scope be 11.8V-13V supply voltage, V11 is main line
Property pipe work in linear zone and power distribution resistance shared heat.From two stabilivolt ZW55A (6.2V-6.8V) series connection
It is because that voltage stabilizing value is preferable in the temperature stability of the stabilivolt of 6.4V or so, it is ensured that the output voltage of linear power supply is in work temperature
There is in the range of degree less fluctuation.
With regard to the calculating of linear sources major parameter：
1st, calculate with regard to the parameter of resistance R10, first it is to be understood that linear sources need the electric current for providing.The electricity that linear sources are provided
Stream is mainly made up of following part：
A. linear sources flow through the maximum current I1 of R*10
I1=13V/ (18K+62K+200K)=0.046mA
B. the quiescent current I2 of integrated circuit CD4093B
Look into handbook and obtain the quiescent current I2 of CD4093B and be 0.001mA to the maximum
C. the electric current I3 of square wave generation circuit
I3=13V/43K/2=0.151mA
D. flow through the electric current I4 of resistance R22
I4=(13V-6.4V)/3K=2.2mA
E. flow through the maximum current I5 (I5 is maximum during current limliting) of resistance R*6
I5MAX=(13V-2.5V)/3K=3.5mA
I5=(13V-7.8V-0.6V)/3K=1.6mA during stable state
F. flow through the electric current I6 of resistance R35
I6=13V/100K=0.13mA
It is computed linear sources demand maximum current I=0.046+0.001+0.151+2.2+3.5+0.13=6.03mA.
For ensureing circuit reliably working in 80V, then resistance R10≤(80V-13V)/6.03mA=11.11K.Examine simultaneously
Consider certain surplus, actual R10 chooses the resistance of 6K.
Ensure stabilivolt V16 energy normal works, it is ensured that the electric current for flowing through stabilivolt under minimum 80V is minimum
It is greater than 0.45mA (the maximum base current IB=that minimum current 0.3mA that stabilivolt needs is needed plus audion V11
6.03/40=0.15mA).
Then R9≤V/I=(80V-13.6V)/0.45mA
R9≤147.6KΩ
Consider certain actual minimum current=(80V-13.6V)/110K for taking R9=110K Ω, so flowing through R9 of surplus
=0.6mA, meets use condition.
3. switching on and shutting down and time delayed turn-off circuit：
Switching on and shutting down schematic diagram as shown in figure 1, on circuit during electricity 8 feet of CD4093B for low, resonating circuit cannot be exported and be shaken
Pulse is swung, therefore circuit can not work.When start-up command TC_ON_OFF is that high level is effective, V26 is output as high level, electricity
Road normally can start, agitator starting of oscillation.Circuit starts normal work.
4. boot power supply circuits：
Bootstrapping drive circuit schematic diagram as shown in figure 1, CD4093B produce square-wave pulse signal through totem pole, C*3 and
V17 charges to C*4, and when the voltage at C*4 two ends reaches V1, V4N-MOS opens threshold value, MOSFET is from linear zone order mistake
Saturation conduction is spent, the capacitance of electric capacity C*4 is controlled, it is possible to achieve the soft start effect of circuit.The S poles of MOSFET start output electricity
Pressure, this output voltage are overlapped by the voltage that bootstrap diode V21 and C*3 are exported and obtain a higher voltage, so
After several cycles, C*4 both end voltages reach 10V or so, make MOSFET fully on, and S poles output voltage reaches bus electricity
Pressure, the voltage exported eventually through bootstrap diode V21 and C*3 are overlapped and reach 10V higher than busbar voltage or so.Such door
Source voltage is 10V or so, can make that MOSFET is normally-open to be operated in saturation conduction area, the work of circuit normally.
Relevant parameter is calculated：
Square wave frequency is taken for 220kHz, VT+=6.5V, VT-=4.1V, VDD=10V.
According to formula
RC=4.624us is obtained, is that reduce loss takes the larger resistance of resistance, capacitance smaller capacitive, so taking R*8=43k, is obtained
C*5=107p, actually takes C*5=100p.Value according to C*5 and R*8 is recalculated
Ton≈1.982us
Toff≈2.245us
T=Ton+Toff ≈ 4.227us
F=1/T=236Khz
Bootstrap capacitor C*4 is approximately constant-current discharge within each low level TOFF time in cycle of square wave, and discharge current is approximate
For (10V-6.4V)/3k+ (10V-8.2V)/3k=1.8mA, therefore C*4 values may be referred to following formula：
C*4≥1.8mA×TOFF/du
In order to reduce the fluctuation of metal-oxide-semiconductor G pole tensions, du=0.05V is taken, then C*4 >=80.82nF, in order to further reduce G
Pole tension fluctuates, actual values 100nF of bootstrap capacitor C*4.
Drive front end one 1nF of increase electric over the ground in order to the switching noise for reducing Bootstrapping drive circuit is disturbed in totem pole
Hold, reduce the switching speed of totem pole.
5. constant current current-limiting circuit：
Current limliting time delayed turn-off circuit is as shown in figure 1, when output current becomes big, the voltage on sampling resistor R1 becomes ambassador three
Pole pipe V5, metal-oxide-semiconductor V1, V4 are operated in linear zone, are operated in the larger conducting resistance in linear zone using metal-oxide-semiconductor to reduce output electricity
Stream makes the voltage on sampling resistor diminish, and so as to form a negative feedback, makes current constant reach current limliting on a particular value
Purpose.When current limliting, stabilivolt V2 cut-offs, the collector voltage of audion V9 start step-down, and C12 starts electric discharge, makes three poles
Pipe V24 ends, and the base level of latching circuit V22 starts to uprise, and causes the audion V22 conductings in switching on and shutting down latching circuit,
Self-locking circuit turn-on so that the base stage of audion V19 is not maintaining conducting, and audion V26 is cut off, resonating circuit due to
8 feet of NAND gate D1C are low, it is impossible to export oscillating impulse, so as to turn off whole circuit.
Cut-off current formula：
Electric current I=(the 6.4V-0.6V)/20K=0.29mA of mirror current source or so two-arm during current limliting, flow valuve of limiting is
4A, takes R4=470 Ω, then cut-off current formula is：
Is=0.29mA × (R4-R3)/R1=0.29mA × (470-R3))/10m Ω=4A
R3=332 Ω are obtained, R3=330 Ω is actually taken, is recalculated cut-off current
Is=0.29mA × (R4-R3)/R1=0.29mA × (470-330))/10m Ω=4.06A
Delay time one is divided into two sections：Electric capacity C12 first discharges, and causes audion V24 to end；Secondly electric capacity C*6 fills
Electricity, reaches the saturation conduction voltage threshold of audion V22 base stages, so as to shut down.Wherein electric discharge of the current limliting time mainly by C*6
What the time determined.
Delay time formula：
A. the 1st stage C12 electric discharges, audion V24 cut-offs, time used are designated as T1；
T1=(R43//R44) × C12 × ln (Vs1/Vt1)
Vs1=(VIN+VCC) × R44//R43/ (R44//R43+R38)+0.6
Wherein VIN=100V, VCC=12V, R44=200K, R38=660K, R43=30K obtain voltage Vs1 before C12 electric discharges
=4.24V
Vt1 is about 1.2V for voltage after electric discharge.
Obtain T1=1.08ms.
B. the 2nd stage C*6 charges, and finally makes circuit shut down, and the time used is designated as T2.Time requirement current limliting delay time is
5ms, then T3=5-1.08=3.92ms.By calculating the capacitance for trying to achieve C*6.
C*6=202nF is obtained, it is actual to choose C*6=220nF.
6. telemetering of current circuit：
Current sampling circuit is as shown in figure 1, share sampling resistor with current-limiting circuit, current sampling circuit adopts image current
The sample mode in source.The demand of different sample rate currents can be met by the size of regulation R*5.
Its typical current sample formula is：
Vsense=Isense × Rsense × R*5/R5
Wherein Vsense is current sample output voltage, and Isense is output current, and Rsense is current sampling resistor.
The index request and measured result of circuit
Specific targets are as follows：(testing below if no special instructions, test condition is normal temperature and pressure environment)
In the present invention, circuit realizes that using bootstrap circuit boost the flash of N-MOS drives, measurable with accurate ground
Current limliting and time delayed turn-off defencive function.Circuit work accommodation wide input voltage range.Control to solid state N-MOS is no longer adopted
Complicated isolation power supply plan, so that simplify circuit design；Control circuit is constituted using CD4093B, and circuit has quiescent dissipation
It is little；The characteristics of Constant flow sample and control based on mirror current source is with constant current current limliting high precision；Quiescent current is low so that control
The power supply of circuit can be powered using simple serial regulating circuit.
The circuit of the present invention, is led to based on the delay circuit of RC using the current sampling circuit mode based on mirror current source
Cross mirror current source to control the door source voltage size of power N-MOS pipes, metal-oxide-semiconductor work is made when load occurs excessively stream or short circuit
Make in linear zone, exact restriction is realized by closed loop feedback.From N-MOS as power switch pipe, by bootstrap circuit boost
To realize that the flash of N-MOS drives.When load occurs excessively stream or even short trouble, circuit can refer to current limit in a design
Fixed safe current value, turns off after time delay certain hour.The overcurrent protection response time is μ s poles, compares traditional fuse protection
The ms magnitudes of time, with technical advantage.Can quickly, accurately protect downstream load equipment, after load equipment is normal, the circuit
Can be restarted again by start-up command.Circuit has soft start, soft turn-off function, when can effectively eliminate capacitive load startup
Surge current, the electromagnetic induction high pressure harm produced when effectively eliminating inductive load power-off.
The technical advantage of the present invention is as follows：
1. the circuit is switched as distribution and power supply protection from N-MOS, opening between control device input and bus
Open and shut-off.The overcurrent capability of the electric current can be extended by N-MOS pipes quantity in parallel, and this circuit is suitable for not surpassing
Cross 100A with electric pathway occasion.
2. using bootstrapping drive control mode, need not be using complicated transformator floating ground isolation drive scheme, type of drive
Simply, reliable the advantages of.
3. the constant current current limliting closed loop feedback control using mirror current source circuit realiration to N-MOS devices, circuit has low
Power consumption, protection fast response time, protection cut-off current high precision, small volume.
4. telemetering of current circuit and the circuit common current sampling resistor for constant current current limliting closed loop feedback control, devise
Telemetering of current circuit based on mirror current source.
5. the time delayed turn-off circuit based on latching circuit is devised, the low side sampling of flash over-current state is realized.
The present invention is to substitute current spacecraft fuse+relay to supply one of solution of distribution system.Meanwhile, circuit
With can recover, reusable excessively stream and short-circuit protection function, be build spacecraft for the autonomous health status monitoring of distribution, from
The critical product of main management satellite platform.Can be used for of various electronics units in distributor, platform and the load of all kinds of satellites
Secondary busbar protective device.
Above content is with reference to specific preferred implementation further description made for the present invention, it is impossible to assert
The present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of without departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (8)
1. a kind of space flight drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：Including under-voltage protecting circuit, auxiliary
Help power supply circuits, constant current current-limiting circuit, bootstrapping power supply circuits, switching on and shutting down and time delayed turn-off circuit, the under-voltage protecting circuit with
The auxiliary power supply circuit is connected, and the auxiliary power supply circuit is connected with the constant current current-limiting circuit, the constant current current-limiting circuit
It is connected with the bootstrapping power supply circuits and the switching on and shutting down and time delayed turn-off circuit respectively, the bootstrapping power supply circuits are opened with described
Shutdown and time delayed turn-off circuit are connected.
2. space flight according to claim 1 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Under-voltage protecting circuit include resistance R7, resistance R8, resistance R14, resistance R*4, resistance R*7, electric capacity C3, Zener diode V12,
Audion V13, audion V15, described resistance R7 one end connect a bus input, the resistance R7 other ends respectively with institute
State electric capacity C3 one end to be connected with described resistance R14 one end, resistance R*7 one end respectively with the Zener diode V12 anodes and three
Pole pipe V15 base stage is connected, and resistance R*4 one end is connected with the Zener diode V12 negative electrodes, the resistance R*4 other ends and institute
State audion V13 colelctor electrodes to be connected, resistance R8 one end connects a bus, resistance R8 other ends difference connecting triode V15 collection
Electrode and audion V13 base stages, audion V13 colelctor electrodes are connected with auxiliary power supply circuit, the resistance R*7 other ends ground connection,
The audion V15 grounded emitters, the audion V13 grounded emitters.
3. space flight according to claim 2 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Auxiliary power supply circuit includes Zener diode V16, resistance R9, resistance R10, audion V11, electric capacity C6, electric capacity C13, the electricity
The resistance R9 and electric capacity C13 is composed in series the RC wave filter to Zener diode V16, the Zener diode V16 and audion
V11 base stages connect, and audion V11 colelctor electrodes are connected with the resistance R10, and the electric capacity C6 connects the audion V11 transmittings
Pole.
4. space flight according to claim 3 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Audion V13 colelctor electrodes are connected with the Zener diode V16 negative electrodes.
5. space flight according to claim 4 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Constant current current-limiting circuit includes N-channel MOS FET transistor V1, N-channel MOS FET transistor V4, resistance R17, resistance R18, resistance
R1, resistance R49, resistance R3, resistance R4, resistance R20, resistance R21, resistance R22, resistance R13, resistance R*6, electric capacity C1, electric capacity
C16, Zener diode V3, audion V5, audion V7, the N-channel MOS FET transistor V1 and N-channel MOS FET are brilliant
Body pipe V4 is in parallel, and the D poles of N-channel MOS FET transistor V1 and the N-channel MOS FET transistor V4, S poles are connected with each other, N ditches
Grid difference series resistance R17 of road mosfet transistor V1 and the N-channel MOS FET transistor V4, resistance R18；Resistance R1
The S poles of N-channel MOS FET transistor V1, V4 and a bus outfan are connected on as the current sampling resistor of loop of power circuit
Leakage current bleeder resistance one end when VOUT, resistance R49 are turned off as N-channel MOS FET transistor V1, V4 is connected to VOUT ends,
The resistance R49 other ends are grounded；Resistance R3, resistance R4 one end are connected with the two ends of resistance R1 respectively, for arranging mirror current source
Cut-off current, resistance R3, the resistance R4 other ends connect two colelctor electrodes to audion V7 respectively, and flying capcitor C1, is used for therebetween
The filtering of difference sampling end；Resistance R20, resistance R21 distinguish two colelctor electrodes of connecting triode V7, for arranging image current
The quiescent point in source, one of them base stage to audion and the shorted on one end of resistance R21, arrange mirror current source and are in and face
Linear area；Zener diode V3 is connected to VOUT ends and resistance R22 one end, the running voltage of stable mirror current source, electric capacity
C16 is composed in series RC wave filter with resistance R22, for the filtering of voltage stabilizing tube voltage, while resistance R22 also functions to determine mirror image electricity
The effect of stream source static operating point；Audion V5 emitter stages are connected on the S poles of N-channel MOS FET transistor V1, V4, audion V5 collection
Electrode is connected on grid current-limiting resistance R17, R18 one end of N-channel MOS FET transistor V1, V4, audion V5 colelctor electrodes and resistance
R*6 connects, and audion V5, resistance R*6 receive mirror current source feedback control jointly, control N-channel MOS FET transistor V1, V4
GS voltages, are allowed to be operated in linear zone；Resistance R13 distinguishes connecting triode V5 base stages and resistance R20 one end, audion V5 base stages
Drive current-limiting resistance.
6. space flight according to claim 5 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Bootstrapping power supply circuits include NPN triode V18, PNP triode V20, electric capacity C*3, storage capacitor C*4, electric capacity C*5, electric capacity
C15, resistance R*8, resistance R29, resistance R*11, switching diode V17, switching diode V21, NAND gate D1C, NAND gate D1D,
NPN triode V18 and PNP triode V20 emitter stage connection composition totem pole drive circuit, PNP triode V20 colelctor electrode connect
Ground, NPN triode V18 colelctor electrode meet the emitter stage Vcc of series voltage stabilizing output triode V11, and resistance R29 is exported as totem pole
One end of current-limiting resistance is connected on NPN triode V18 emitter stage, and the resistance R29 other ends are connected with electric capacity C*3 one end, and electric capacity C*3 is another
End meets switching diode V17 anodes and switching diode V21 negative electrodes, switching diode V17 negative electrodes and switching diode V21 respectively
Anode two ends connect storage capacitor C*4 two ends respectively；Electric capacity C*3, switching diode V17, switching diode V21 and storage capacitor
C*4 is combined, and G, S control circuit for N-channel MOS FET transistor two MOSFET of V1, V4 provides bootstrapping power supply；With it is non-
The 9 feet connection electric capacity C*5 and resistance R*8 of door D1C, constitutes typical self-resonance agitator, 10 feet and the resistance R* of wherein D1C
8 one end connect；12 feet of NAND gate D1D, 13 feet connect and compose inverse gate output, the 11 feet connection resistance of reverse swing door output D1D
The RC wave filter that R*11 and electric capacity C15 is constituted, wave filter export the input as totem-pote circuit.
7. space flight according to claim 6 drives current-limiting protection circuit with the bootstrapping of N-MOS flash, it is characterised in that：It is described
Switching on and shutting down and time delayed turn-off circuit include audion V28, audion V22, audion V9, audion V19, audion V26, switch
Diode V27, resistance R35, resistance R37, resistance R41, resistance R30, resistance R38, resistance R44, resistance R43, resistance R45, electricity
Resistance R39, resistance R31, electric capacity C7, electric capacity C*6, electric capacity C9, stabilivolt V2, electric capacity C12, resistance R44, audion V28, three poles
Pipe V22, audion V24, resistance R37, resistance R41 constitute typical self-locking circuit, and resistance R37 connects B, E interpolar of V28,
Resistance R41 is connected to B, E interpolar of audion V22；Electric capacity C7 is in parallel with resistance R37, and electric capacity C*6 is in parallel with resistance R41, plays filter
Ripple is acted on；Resistance R30 and electric capacity C9 composition RC filtering, is filtered to high level start-up command TC_ON_OFF of outside input；
Resistance R19 GS voltages to N-channel MOS FET transistor V1, V4 of being connected with stabilivolt V2 are sampled, and stabilivolt V2 anodes connect
VOUT_1 ends, stabilivolt V2 negative electrodes connect audion V9 base stages；Resistance R38, resistance R44 are connected and are connected with audion V9 colelctor electrodes
Connect, resistance R44 one end controls the switching of audion V24 again after resistance R43, resistance R45 connect partial pressure；Electric capacity C12 and electricity
R44 is in parallel for resistance, and voltage on resistance R44 is filtered；High level control of the audion V19 base stages by start-up command TC_ON_OFF
System, switching diode V27, Jing resistance R39 and resistance R31 series connection partial pressure that TC_ON_OFF is concatenated, audion V26 colelctor electrodes
Connect with resistance R35, resistance R35 one end connects 8 feet of NAND gate circuit D1C, control resonating circuit whether starting of oscillation.
8. the space flight according to any one of claim 1 to 7 drives current-limiting protection circuit, its feature with the bootstrapping of N-MOS flash
It is：Space flight N-MOS flash bootstrapping drives current-limiting protection circuit also to include telemetering of current circuit, the telemetering of current circuit
Including PNP to audion V8, PNP triode V10, electric capacity C10, electric capacity C14, stabilivolt V14, resistance R23, resistance R24, resistance
R46, electric capacity C2, resistance R5, R6, resistance R*5, resistance R46 to be connected with electric capacity C14 and provide RC filtering, electric capacity for stabilivolt V14
C14 connection stabilivolt V14 two ends；Resistance R23, resistance R24 are that mirror current source arranges quiescent point, resistance R23 and resistance
R24 one end connects PNP respectively and two colelctor electrodes of audion V8, resistance R23 and the resistance R24 other ends is connected with resistance R46；Electricity
Resistance R5, R6 one end bridges the two ends of sampling resistor R1 respectively, and PNP triode V10 is used as image current source output terminal, tri- poles of PNP
Pipe V10 emitter stages are connected to one end of resistance R5, and PNP triode V10 colelctor electrode is connected to resistance R*5 one end, resistance R48 and electricity
Hold the RC filtering of C10 composition remote measurement output circuits.
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| CN107765068A (en) * | 2017-10-17 | 2018-03-06 | 电子科技大学中山学院 | Current detection circuit and current detection equipment |
| CN110336252A (en) * | 2019-08-16 | 2019-10-15 | 深圳市智微智能软件开发有限公司 | Space solid state distribution protects circuit, method and power supply-distribution system |
| CN111181535A (en) * | 2020-02-17 | 2020-05-19 | 西安微电子技术研究所 | Anti-irradiation distribution current-limiting switch circuit |
| CN113300321A (en) * | 2021-04-23 | 2021-08-24 | 上海卫星工程研究所 | Intelligent power distribution circuit based on MOSFET (metal-oxide-semiconductor field effect transistor), and satellite power distribution equipment |
| CN113452244A (en) * | 2021-06-25 | 2021-09-28 | 山东航天电子技术研究所 | LCL distribution control circuit |
| CN113625820A (en) * | 2021-09-06 | 2021-11-09 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
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| CN113300321A (en) * | 2021-04-23 | 2021-08-24 | 上海卫星工程研究所 | Intelligent power distribution circuit based on MOSFET (metal-oxide-semiconductor field effect transistor), and satellite power distribution equipment |
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| CN113452244A (en) * | 2021-06-25 | 2021-09-28 | 山东航天电子技术研究所 | LCL distribution control circuit |
| CN113625820A (en) * | 2021-09-06 | 2021-11-09 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
| CN113625820B (en) * | 2021-09-06 | 2022-03-15 | 武汉职业技术学院 | Current-limiting protection circuit with wide power supply voltage range |
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