CN104065028B - Electronic insurance silk device and its operational approach - Google Patents
Electronic insurance silk device and its operational approach Download PDFInfo
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- CN104065028B CN104065028B CN201310088254.9A CN201310088254A CN104065028B CN 104065028 B CN104065028 B CN 104065028B CN 201310088254 A CN201310088254 A CN 201310088254A CN 104065028 B CN104065028 B CN 104065028B
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Abstract
The invention discloses a kind of electronic insurance silk device and its operational approach, this electronic insurance silk device is connected between a power end and a system end, mainly comprises an electrical fuse, a protective switch of the short circuit, a current detection module and a digital control module.The detection of this current detection module flows to an operation electric current size of this system end from this power end.This digital control module produces a control signal to control this electrical fuse.When this current detection module detects this operation electric current for overcurrent, this digital control module produces this control signal of high level, to turn off this electrical fuse, provides overcurrent protection；When this system end is short-circuited, turn on this protective switch of the short circuit, to turn off this electrical fuse, provide short-circuit protection.
Description
Technical field
The present invention has overcurrent and short-circuit protection about a kind of electronic insurance silk device and its operational approach, espespecially one kind
The electronic insurance silk device of function and its operational approach.
Background technology
Electrical fuse, or claim electrical fuse (electronic fuse, E-fuse) to be configured at various semiconductor devices
In, and often produced using semiconductor technology to be applied in this semiconductor device.
But the size with integrated circuit constantly reduces, and because leverage integrated circuit limited by Technology
Design, either using outside laser burn laser fusion method wiry or using current fusing fuse material electronics
Fusion method, all will face the target being increasingly difficult to reach high yield and high-reliability.
Therefore, how to design a kind of electronic insurance silk device and its operational approach to pass it is only necessary to replace using passive device
Complicated integrated circuit (integrated circuit, the IC) design and craft of system, when system occurs overcurrent or short-circuit state
When, an electrical fuse can be turned off, protect effect to reach overcurrent protection with short circuit isolation, when not only can reduce exploitation
Between, element cost, be more provided that the control of elasticity, be to be intended to go, by inventor, the big class that overcomes and solve
Topic.
Content of the invention
One purpose of the present invention is to provide a kind of electronic insurance silk device, to overcome problem of the prior art.Therefore originally
The electronic insurance silk device of invention is connected between a power end and a system end.This electronic insurance silk device comprises a soft start
Module, a Voltage Establishment module, an electrical fuse, a protective switch of the short circuit, a current detection module and one are digital control
Module.This soft-start module receives a first voltage, with this electronic insurance silk device of soft start.This Voltage Establishment module connects should
Soft-start module, receives a second voltage, to provide Voltage Establishment during this electronic insurance silk device soft start.This electronic insurance
Silk has a first end, one second end and a drive end, and wherein this drive end connects this soft-start module.This short-circuit protection is opened
Pass has a first end, one second end and a drive end, and wherein this first end connects this soft-start module, and this second end connects
This second end of this electrical fuse and this system end, and this drive end connects this Voltage Establishment module.This current detecting mould
Block connects this first end of this electrical fuse, and receives this second voltage, flows to this system end to detect from this power end
An operation electric current size.This digital control module connects this current detection module, this soft-start module and this Voltage Establishment
Module, produces a control signal to control this electrical fuse.Wherein, when this current detection module detects this operation electric current it is
During overcurrent, this digital control module produces this control signal of high level, to turn off this electrical fuse, provides over current protection
Shield；When this system end is short-circuited, turn on this protective switch of the short circuit, to turn off this electrical fuse, provide short-circuit protection.
Another object of the present invention is to providing a kind of operational approach of UPS, to overcome asking of prior art
Topic.The operational approach of UPS therefore of the present invention comprises the steps of：A () provides an electrical fuse and a short-circuit protection
Switch；B () provides a current detection module, detection flows to an operation electric current size of this system end from this power end；C () provides
One digital control module, produces a control signal to control this electrical fuse；D () detects this behaviour when this current detection module
When making electric current for overcurrent, this digital control module produces this control signal of high level, to turn off this electrical fuse, provides
Overcurrent protection；E (), when this system end is short-circuited, turns on this protective switch of the short circuit, to turn off this electrical fuse, provide
Short-circuit protection.
In order to be able to be further understood that the present invention is to reach technology, means and effect that predetermined purpose is taken, refer to
Below in connection with detailed description of the invention and accompanying drawing it is believed that the purpose of the present invention, feature and feature, when can thus one deeply and
Specific understanding, but institute's accompanying drawings only provide with reference to and illustrate to use, and are not used for the present invention person of being any limitation as.
Brief description
Fig. 1 is the block chart of the present invention one electronic insurance silk device；
Fig. 2 is the circuit diagram of this electronic insurance silk device one preferred embodiment of the present invention；
Fig. 3 is the schematic diagram of this electronic insurance silk device soft start of the present invention and Voltage Establishment；
Fig. 4 is the schematic diagram of this electronic insurance silk device overcurrent protection of the present invention；
Fig. 5 is the schematic diagram of this electronic insurance silk device short-circuit protection of the present invention；And
Fig. 6 is the flow chart of this electronic insurance silk device operational approach of the present invention.
Wherein, description of reference numerals is as follows：
The present invention
10 soft-start modules
20 Voltage Establishment modules
30 electrical fuses
40 protective switch of the short circuit
50 current detection modules
60 digital control modules
70 voltage regulation units
102 first diodes
104 first switches
106 soft start resistance
108 soft start capacitors
202 second diodes
204 second switches
206 Voltage Establishment resistance
208 Voltage Establishment electric capacity
301 first ends
302 second ends
303 drive ends
401 first ends
402 second ends
403 drive ends
502 detection resistance
504 sensing amplifiers
602 analog digital converting unit
604 comparing units
1041 first ends
1042 second ends
1043 drive ends
2041 first ends
2042 second ends
2043 drive ends
Pt power end
St system end
Ips operation electric current
Vcc1 first voltage
Vcc2 second voltage
Vth critical voltage
Vsena Simulation scale-up senses voltage
Vsend numeral amplifies sensing voltage
Sc control signal
Pc1 first charge path
Pc2 second charge path
S10～S50 step
Specific embodiment
Hereby the technical content and a detailed description for the present invention, cooperation schema is described as follows：
Refer to the block chart that Fig. 1 is the present invention one electronic insurance silk device.This electronic insurance silk device is connected to an electricity
Between source Pt and system end St.This electronic insurance silk device comprises a soft-start module 10, a Voltage Establishment module 20,
Electrical fuse 30, a protective switch of the short circuit 40, a current detection module 50 and a digital control module 60.This soft start mould
Block 10 receives first voltage Vcc1, with this electronic insurance silk device of soft start.Wherein, this first voltage Vcc1 representative value is 18
Volt DC voltage, but be not limited.This Voltage Establishment module 20 connects this soft-start module 10, receives a second voltage
Vcc2, to provide Voltage Establishment during this electronic insurance silk device soft start.Wherein, this second voltage Vcc2 representative value is 12 volts
Special DC voltage, but be not limited.This electrical fuse 30 has a first end 301, one second end 302 and a drive end
303, wherein this drive end 303 connects this soft-start module 10.This protective switch of the short circuit 40 has a first end 401, one second
End 402 and a drive end 403, wherein this first end 401 connect this soft-start module 10, and this second end 402 connects this electronics
This second end 302 of electric fuse 30 and this system end St, and this drive end 403 this Voltage Establishment module 20 of connection.Wherein, should
Protective switch of the short circuit 40 can be a metal oxide semiconductcor field effect transistor (metal-oxide-semiconductor
Field-effect transistor, MOSFET), but be not limited.If taking n-channel MOSFET as a example, this first end 401
For drain electrode (drain), this second end 402 is source electrode (source) and this drive end 403 is grid (gate).This current detecting
Module 50 connects this first end 301 of this electrical fuse 30, and receives this second voltage Vcc2, to detect from this power end
Pt flows to an operation electric current Ips size of this system end St.This digital control module 60 connects this current detection module 50, this is soft
Starting module 10 and this Voltage Establishment module 20, produce control signal Sc to control this electrical fuse 30.Wherein, when this
When current detection module 50 detects this operation electric current Ips for overcurrent, this digital control module 60 produces this control of high level
Signal Sc processed, to turn off this electrical fuse 30, provides overcurrent protection；When this system end St is short-circuited, turn on this short
Road protection switch 40, to turn off this electrical fuse 30, provides short-circuit protection.
Refer to the circuit diagram that Fig. 2 is this electronic insurance silk device one preferred embodiment of the present invention.Fig. 2 discloses figure further
The component being formed in the plurality of block chart shown in 1, is a preferred embodiment of the present invention, but is not limited.This is soft
Starting module 10 comprises a soft start capacitor 108, a soft start resistance 106, a first switch 104 and one first diode
102.This soft start resistance 106 connects this soft start capacitor 108, to receive this first voltage Vcc1.This first switch 104 has
One first end 1041, one second end 1042 and a drive end 1043, wherein this soft start capacitor 108 are connected to this first end
1041 with this second end 1042.This first diode 102 connects this drive end 1043 of this first switch 104, to receive this control
Signal Sc processed.This Voltage Establishment module 20 comprises a Voltage Establishment electric capacity 208, a Voltage Establishment resistance 206, a second switch
204 and one second diode 202.This Voltage Establishment resistance 206 connects this Voltage Establishment electric capacity 208, to receive this second electricity
Pressure Vcc2.This second switch 204 has a first end 2041, one second end 2042 and a drive end 2043, wherein this voltage
Set up electric capacity 208 and be connected to this first end 2041 and this second end 2042.This second diode 202 connects this second switch 204
This drive end 2043, to receive this control signal Sc.
This current detection module 50 comprises a detection resistance 502 and a sensing amplifier 504.This detection resistance 502 one end
Connect this first end 301 of this electrical fuse 30, the other end connects this Voltage Establishment resistance of this Voltage Establishment module 20
206.This sensing amplifier 504 receives a voltage difference at this detection resistance 502 two ends, and this voltage difference is amplified to export one
Simulation scale-up senses voltage Vsena.Wherein, this sensing amplifier 504 can be a differential amplifier (differential
amplifier).This digital control module 60 comprises an analog digital converting unit 602 and a comparing unit 604.This simulation number
Word converting unit 602 receives this Simulation scale-up sensing voltage Vsena, and changes this Simulation scale-up sensing voltage Vsena into a number
Word amplifies sensing voltage Vsend.This comparing unit 604 receives this numeral and amplifies a sensing voltage Vsend and critical voltage Vth,
Wherein when this numeral is amplified sensing voltage Vsend and is more than this critical voltage Vth, this comparing unit 604 produces being somebody's turn to do of high level
Control signal Sc；When this numeral is amplified sensing voltage Vsend and is less than or equal to this critical voltage Vth, this comparing unit 604 produces
Raw this control signal Sc low level.Additionally, this electronic insurance silk device also comprises a voltage regulation unit 70.This voltage regulation unit 70 is even
It is connected between this drive end 403 of this protective switch of the short circuit 40 and this Voltage Establishment module 20, with to this protective switch of the short circuit 40
Voltage-stabilizing protection is provided.Wherein, this voltage regulation unit 70 can be Zener diode (Zener diode).As for this electrical fuse
The operating instruction of device, by there being detailed elaboration hereinafter.
Refer to the schematic diagram that Fig. 3 is this electronic insurance silk device soft start of the present invention and Voltage Establishment.When this electronics is protected
During dangerous silk device electrifying startup, this digital control module 60 produces this control signal Sc low level, now, this first switch
104 is cut-off (turned off) state with this second switch 204, and therefore, this first voltage Vcc1 passes through this soft start resistance
The 106 one first charge path Pc1 being formed with this soft start capacitor 108 are charged to this soft start capacitor 108, with soft start
(soft start) this electronic insurance silk device, and, after this soft start capacitor 108 is via charging, capacitance voltage gradually increases
Plus, then this drive end 303 of this electrical fuse 30 of triggering and conducting.Meanwhile, this second voltage Vcc2 passes through this Voltage Establishment electricity
The one second charge path Pc2 that resistance 206 and this Voltage Establishment electric capacity 208 are formed is to provide this electronic insurance silk device soft start
When Voltage Establishment.Wherein, this digital control module 60 can be a digital signal processor (digital signal
Processor, DSP), but do not limited with this.Thereby, after completing soft start and Voltage Establishment, this electronic insurance silk device enters
Protection detection state.When the power supply (not shown) of this power end Pt is powered to the load (sign) of this system end St,
Operation electric current Ips flowing to this system end St from this power end Pt then flows through this current detection module 50 and this electrical fuse
30.
Refer to the schematic diagram that Fig. 4 is this electronic insurance silk device overcurrent protection of the present invention.From the above, this electric current inspection
This detection resistance 502 surveying module 50 is to detect the size of this operation electric current Ips.That is, this operation electric current Ips flows through this detection
After resistance 502, voltage difference can be produced at this detection resistance 502 two ends, this sensing amplifier 504 amplifies this voltage difference to export
This Simulation scale-up senses voltage Vsena.Then, this analog digital converting unit 602 receives this Simulation scale-up sensing voltage
Vsena, and change this Simulation scale-up sensing voltage Vsena for this numeral amplification sensing voltage Vsend.Then, this comparing unit
604 this numeral of reception are amplified sensing voltage Vsend and this critical voltage Vth and are compared.
When this operation electric current Ips flowing through this detection resistance 502 is normal, that is, this numeral amplifies sensing voltage
When Vsend is less than or equal to this critical voltage Vth, this comparing unit 604 produces this control signal Sc low level, therefore, should
First switch 104 and this second switch 204 are still cut-off (turned off) state.Now, the power supply of this power end Pt is to this
The load of system end St is still normal powered operation.However, when this operation electric current Ips flowing through this detection resistance 502 was
During electric current, that is, when this numeral amplifies sensing voltage Vsend more than this critical voltage Vth, this comparing unit 604 produces high electricity
This flat control signal Sc, therefore, this first switch 104 and this second switch 204 are then cut by cut-off (turned off) state
It is changed to conducting (turned on) state.As shown in figure 4, because this first switch 104 and this second switch 204 are conducting state,
Therefore, this soft start capacitor 108 and this Voltage Establishment electric capacity are discharged with this second switch 204 via this first switch 104 respectively,
And, after this soft start capacitor 108 is via electric discharge, capacitance voltage is gradually reduced, then triggering ends this electrical fuse 30
This drive end 303, to turn off this electrical fuse 30 so that the power interruptions of this power end Pt are entered to the load of this system end St
Row power supply, to provide overcurrent protection.
Only, above-mentioned overcurrent protection is one embodiment of the invention, and more broadly current protection is by setting this numeral
Control module 60 is received this critical voltage Vth size, to reach current limit (current limit) function, that is, when this
Operation electric current (coordinates the setting of this critical voltage Vth) when being more than a certain current value, and this comparing unit 604 produces being somebody's turn to do of high level
Control signal Sc, to switch this first switch 104 with this second switch 204 for conducting (turned on) state, and then triggering cuts
Stop this drive end 303 of this electrical fuse 30, to turn off this electrical fuse 30 so that the power interruptions pair of this power end Pt
The load of this system end St is powered, to provide overcurrent protection.Furthermore, due to the situation of overcurrent be also possible to because
Led to by moment transient state (transient) in system operation procedure, therefore, in the present invention, also can be passed through this number further
Word control module 60 judges that this numeral amplifies persistent period or the intensity that sensing voltage Vsend is more than this critical voltage Vth, to enter
One step is confirmed whether it is real overcurrent abnormality state or reaches current limit standard, and must export this control signal of high level
Sc, to trigger this drive end 303 ending this electrical fuse 30, provides overcurrent protection to turn off this electrical fuse 30.
Or only moment transient state action, and overcurrent protection need not be started.
Refer to the schematic diagram that Fig. 5 is this electronic insurance silk device short-circuit protection of the present invention.From the above, when completing soft opening
Dynamic with Voltage Establishment after, this electronic insurance silk device enters protection detection state.When this system end St is short-circuited, due to
The voltage that this Voltage Establishment electric capacity 208 is set up and this system end St are short-circuited, and ground connection is produced to be biased, and causes this voltage stabilizing
Unit 70, that is, the conducting of this Zener diode reverse bias, therefore this drive end of this protective switch of the short circuit 40 of triggering and conducting
403.Once this protective switch of the short circuit 40 turns on, by make this second end 302 (being also source electrode) of this electrical fuse 30 with
The voltage difference of this drive end 303 (being also grid) is zero (that is, the gate-source voltage of this electrical fuse 30 is zero), therefore,
Turn off this electrical fuse 30, to provide short circuit isolation to protect.It is worth mentioning, because short trouble is for the device of whole system
More serious with element impact, therefore, when system end St is short-circuited, if receive short via this digital control module 60
Road abnormality detection, then through communication and calculating process, until short circuit isolation exclusion, required time is longer, will be unable to provide has most
The short trouble protection of effect.Therefore, directly utilize the hardware element characteristic of this electronic insurance silk device in the present invention, provide fast
The instant short circuit isolation protection of speed.
Refer to the flow chart that Fig. 6 is this electronic insurance silk device operational approach of the present invention.This electronic insurance silk device is even
It is connected between a power end and a system end.The step that this electronic insurance silk device operational approach is comprised is as described below.First,
One electrical fuse and a protective switch of the short circuit (S10) are provided.Wherein, this protective switch of the short circuit partly can be led for a metal-oxide
Body field-effect transistor (metal-oxide-semiconductor field-effect transistor, MOSFET), but not with
This is limited.It is worth mentioning, before step (S10), also comprise to provide a soft-start module and a Voltage Establishment module.This is soft to open
Dynamic model block receives a first voltage, with this electronic insurance silk device of soft start.This Voltage Establishment module receives a second voltage, with
Voltage Establishment during this electronic insurance silk device soft start is provided.Wherein, this soft-start module comprises a soft start capacitor, soft
Start resistance, a first switch and one first diode.This soft start resistance connects this soft start capacitor, with receive this first
Voltage.This first switch has a first end, one second end and a drive end, wherein this soft start capacitor be connected to this first
End and this second end.This first diode connects this drive end of this first switch, to receive this control signal.This Voltage Establishment
Module comprises a Voltage Establishment electric capacity, a Voltage Establishment resistance, a second switch and one second diode.This Voltage Establishment electricity
Resistance connects this Voltage Establishment electric capacity, to receive this second voltage.This second switch has a first end, one second end and a drive
Moved end, wherein this Voltage Establishment capacitance connection are in this first end and this second end.This second diode connects this second switch
This drive end, to receive this control signal.
Then, provide a current detection module, detection flows to an operation electric current size of this system end from this power end
(S20).Wherein, this current detection module comprises a detection resistance and a sensing amplifier.This detection resistance one end connects this electricity
Sub- electric fuse, the other end connects this Voltage Establishment resistance of this Voltage Establishment module.This sensing amplifier receives this detection resistance
One voltage difference at two ends, and this voltage difference is amplified to export a Simulation scale-up sensing voltage.Then, provide one digital control
Module, produces a control signal to control this electrical fuse (S30).From the above, this digital control module produces low level
This control signal, to complete soft start (soft start) and Voltage Establishment.In specific words, when electronic insurance silk device starts
When, this digital control module produces this control signal low level, to control this first switch and this second switch for cut-off
(turned off) state, this first voltage passes through one first charging circuit that this soft start resistance is formed with this soft start capacitor
Charge to this soft start capacitor in footpath, with soft start (soft start) this electronic insurance silk device；This second voltage is by this electricity
Pressure sets up one second charge path that resistance and this Voltage Establishment electric capacity formed to provide this electronic insurance silk device soft start
When Voltage Establishment.Wherein, this digital control module comprises an analog digital converting unit and a comparing unit.This simulation numeral
Converting unit receives this Simulation scale-up sensing voltage, and changes this Simulation scale-up sensing voltage into a numeral amplification sensing voltage.
This comparing unit receives this numeral and amplifies sensing voltage and a critical voltage, wherein amplifies sensing voltage when this numeral and faces more than this
During boundary's voltage, this comparing unit produces this control signal of high level；Amplify sensing voltage when this numeral to face less than or equal to this
During boundary's voltage, this comparing unit produces this control signal low level.
When this current detection module detects this operation electric current for overcurrent, this digital control module produces high level
This control signal, to turn off this electrical fuse, provides overcurrent protection (S40).In specific words, when flowing through this detection resistance
When this operation electric current is overcurrent, this numeral is amplified sensing voltage and is more than this critical voltage, and this comparing unit produces high level
This control signal, is to turn on (turned to switch this first switch and this second switch by ending (turned off) state
On) state, and then trigger this drive end ending this electrical fuse, provide overcurrent protection to turn off this electrical fuse.
When this system end is short-circuited, turn on this protective switch of the short circuit, to turn off this electrical fuse, provide short circuit guarantor
Shield (S50).It is worth mentioning, the step of this electronic insurance silk device operational approach also comprises to provide a voltage regulation unit, is connected to this
Between this drive end of protective switch of the short circuit and this Voltage Establishment module, to provide voltage-stabilizing protection to this protective switch of the short circuit.When
When this system end is short-circuited, this voltage regulation unit reverse bias turns on, this drive end of this protective switch of the short circuit of triggering and conducting, with
Turning off this electrical fuse provides short circuit isolation protection.
In sum, the present invention has following feature and advantage：
1st, only need to use passive device, replace the complicated integrated circuit (integrated circuit, IC) of tradition and set
Meter and technique, not only can reduce development time, element cost, be more provided that the control of elasticity；
2nd, this electronic insurance silk device and its operational approach have overcurrent protection (inclusion current limit function) and short circuit
Insulation blocking；
3rd, utilize this digital control module 60, it can be realized with digital signal processor, more accurate, more elastic mistake is provided
Current protection controls；And
4th, directly utilize the hardware element characteristic of this electronic insurance silk device, provide short circuit isolation instant rapidly to protect,
To reduce the injury caused by short trouble.
Only, the above, the detailed description of preferred embodiment only of the present invention and schema, only the feature of the present invention is simultaneously
It is not limited to this, and is not used to limit the present invention, all scopes of the present invention should be defined by applying for a patent right claimed range, all
Together in the embodiment of the spirit change similar with it of the present patent application scope of the patent claims, the model of the present invention all should be contained in
In farmland, any those skilled in the art in the field of the invention, can think easily and change or modify all can cover following
The scope of the patent claims of the present invention.
Claims (14)
1. a kind of electronic insurance silk device, is connected between a power end and a system end, and this electronic insurance silk device comprises：
One soft-start module, receives a first voltage, with this electronic insurance silk device of soft start；
One Voltage Establishment module, connects this soft-start module, receives a second voltage, is opened with providing this electronic insurance silk device being soft
Voltage Establishment when dynamic；
One electrical fuse, has a first end, one second end and a drive end, and wherein this drive end connects this soft start mould
Block；
One protective switch of the short circuit, has a first end, one second end and a drive end, and wherein this first end connects this soft start
Module, this second end connects this second end and this system end of this electrical fuse, and this drive end connects this Voltage Establishment
Module；
One current detection module, connects this first end of this electrical fuse, and receives this second voltage, to detect from this electricity
Source flows to an operation electric current size of this system end；And
One digital control module, connects this current detection module, this soft-start module and this Voltage Establishment module, produces a control
Signal processed is to control this electrical fuse；
Wherein, when this current detection module detects this operation electric current for overcurrent, this digital control module produces high level
This control signal, to turn off this electrical fuse, provide overcurrent protection；When this system end is short-circuited, turn on this short
Road protection switch, to turn off this electrical fuse, provides short-circuit protection.
2. electronic insurance silk device as claimed in claim 1, wherein：
This soft-start module comprises：
One soft start capacitor；
One soft start resistance, connects this soft start capacitor, to receive this first voltage；
One first switch, has a first end, one second end and a drive end, wherein this soft start capacitor be connected to this first
End and this second end；And
One first diode, connects this drive end of this first switch, to receive this control signal；
This Voltage Establishment module comprises：
One Voltage Establishment electric capacity；
One Voltage Establishment resistance, connects this Voltage Establishment electric capacity, to receive this second voltage；
One second switch, has a first end, one second end and a drive end, wherein this Voltage Establishment capacitance connection in this
One end and this second end；And
One second diode, connects this drive end of this second switch, to receive this control signal；
This current detection module comprises：
One detection resistance, one end connects this first end of this electrical fuse, and the other end connects this electricity of this Voltage Establishment module
Pressure sets up resistance；And
One sensing amplifier, receives a voltage difference at this detection resistance two ends, and this voltage difference is amplified to export a simulation
Amplify sensing voltage；And
This digital control module comprises：
One analog digital converting unit, receives this Simulation scale-up sensing voltage, and changes this Simulation scale-up sensing voltage into a number
Word amplifies sensing voltage；And
One comparing unit, receives this numeral and amplifies sensing voltage and a critical voltage, wherein when this numeral amplification sensing voltage is big
When this critical voltage, this comparing unit produces this control signal of high level；When this numeral amplification sensing voltage is less than or waits
When this critical voltage, this comparing unit produces this control signal low level.
3. when electronic insurance silk device as claimed in claim 1, wherein electronic insurance silk device start, this digital control module
Produce this control signal low level, to complete soft start and Voltage Establishment.
4. electronic insurance silk device as claimed in claim 2, wherein when electronic insurance silk device starts, this digital control mould
Block produces this control signal low level, and to control this first switch and this second switch as cut-off state, this first voltage is led to
Cross one first charge path that this soft start resistance and this soft start capacitor formed this soft start capacitor to be charged, with soft start
This electronic insurance silk device；This second voltage is filled by this Voltage Establishment resistance is formed with this Voltage Establishment electric capacity one second
Power path is to provide Voltage Establishment during this electronic insurance silk device soft start.
5. electronic insurance silk device as claimed in claim 2, wherein when this operation electric current flowing through this detection resistance was electricity
During stream, this numeral is amplified sensing voltage and is more than this critical voltage, and this comparing unit produces this control signal of high level, to switch
This first switch and this second switch are conducting state by cut-off state, and then trigger this driving ending this electrical fuse
End, provides overcurrent protection to turn off this electrical fuse.
6. electronic insurance silk device as claimed in claim 2, wherein also comprises a voltage regulation unit, is connected to this short-circuit protection and opens
Between this drive end closing and this Voltage Establishment module, to provide voltage-stabilizing protection to this protective switch of the short circuit.
7. electronic insurance silk device as claimed in claim 6, wherein when this system end is short-circuited, this voltage regulation unit is reverse
Bias conducting, this drive end of this protective switch of the short circuit of triggering and conducting, provide short circuit isolation protection to turn off this electrical fuse.
8. a kind of operational approach of electronic insurance silk device, this electronic insurance silk device be connected to a power end and a system end it
Between, this operational approach comprises the steps of：
A () provides an electrical fuse and a protective switch of the short circuit；
B () provides a current detection module, detection flows to an operation electric current size of this system end from this power end；
C () provides a digital control module, produce a control signal to control this electrical fuse；
D (), when this current detection module detects this operation electric current for overcurrent, this digital control module produces high level
This control signal, to turn off this electrical fuse, provides overcurrent protection；And
E (), when this system end is short-circuited, turns on this protective switch of the short circuit, to turn off this electrical fuse, provide short circuit guarantor
Shield；
Wherein also comprised before step (a)：
(a1) provide a soft-start module, receive a first voltage, with this electronic insurance silk device of soft start；And
(a2) provide a Voltage Establishment module, receive a second voltage, to provide electricity during this electronic insurance silk device soft start
Pressure is set up.
9. the operational approach of electronic insurance silk device as claimed in claim 8, wherein：
This soft-start module comprises：
One soft start capacitor；
One soft start resistance, connects this soft start capacitor, to receive this first voltage；
One first switch, has a first end, one second end and a drive end, wherein this soft start capacitor be connected to this first
End and this second end；And
One first diode, connects this drive end of this first switch, to receive this control signal；
This Voltage Establishment module comprises：
One Voltage Establishment electric capacity；
One Voltage Establishment resistance, connects this Voltage Establishment electric capacity, to receive this second voltage；
One second switch, has a first end, one second end and a drive end, wherein this Voltage Establishment capacitance connection in this
One end and this second end；And
One second diode, connects this drive end of this second switch, to receive this control signal；
This current detection module comprises：
One detection resistance, one end connects this electrical fuse, and the other end connects this Voltage Establishment resistance of this Voltage Establishment module；
And
One sensing amplifier, receives a voltage difference at this detection resistance two ends, and this voltage difference is amplified to export a simulation
Amplify sensing voltage；And
This digital control module comprises：
One analog digital converting unit, receives this Simulation scale-up sensing voltage, and changes this Simulation scale-up sensing voltage into a number
Word amplifies sensing voltage；And
One comparing unit, receives this numeral and amplifies sensing voltage and a critical voltage, wherein when this numeral amplification sensing voltage is big
When this critical voltage, this comparing unit produces this control signal of high level；When this numeral amplification sensing voltage is less than or waits
When this critical voltage, this comparing unit produces this control signal low level.
10. when the operational approach of electronic insurance silk device as claimed in claim 8, wherein electronic insurance silk device start, should
Digital control module produces this control signal low level, to complete soft start and Voltage Establishment.
The operational approach of 11. electronic insurance silk devices as claimed in claim 9, wherein when electronic insurance silk device starts,
This digital control module produces this control signal low level, to control this first switch and this second switch as cut-off state,
One first charge path that this first voltage is formed by this soft start resistance and this soft start capacitor is to this soft start capacitor
Charge, with this electronic insurance silk device of soft start；This second voltage passes through this Voltage Establishment resistance and this Voltage Establishment electric capacity institute
One second charge path being formed is to provide Voltage Establishment during this electronic insurance silk device soft start.
The operational approach of 12. electronic insurance silk devices as claimed in claim 9, wherein when this operation flowing through this detection resistance
When electric current is overcurrent, this numeral is amplified sensing voltage and is more than this critical voltage, and this comparing unit produces this control of high level
Signal, to switch this first switch and this second switch by cut-off state as conducting state, and then triggers this electronic insurance of cut-off
This drive end of silk, provides overcurrent protection to turn off this electrical fuse.
The operational approach of 13. electronic insurance silk devices as claimed in claim 9, wherein the method comprises further：
One voltage regulation unit is provided, is connected between this drive end of this protective switch of the short circuit and this Voltage Establishment module, with to this
Protective switch of the short circuit provides voltage-stabilizing protection.
The operational approach of 14. electronic insurance silk devices as claimed in claim 13, wherein when this system end is short-circuited, should
Voltage regulation unit reverse bias turns on, this drive end of this protective switch of the short circuit of triggering and conducting, to turn off the offer of this electrical fuse
Short circuit isolation is protected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310088254.9A CN104065028B (en) | 2013-03-19 | 2013-03-19 | Electronic insurance silk device and its operational approach |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310088254.9A CN104065028B (en) | 2013-03-19 | 2013-03-19 | Electronic insurance silk device and its operational approach |
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| CN104065028A CN104065028A (en) | 2014-09-24 |
| CN104065028B true CN104065028B (en) | 2017-03-01 |
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| CN201310088254.9A Expired - Fee Related CN104065028B (en) | 2013-03-19 | 2013-03-19 | Electronic insurance silk device and its operational approach |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633908B (en) * | 2014-10-30 | 2018-08-31 | 华硕电脑股份有限公司 | Electronic device and power protection method |
| CN110874094A (en) * | 2018-09-04 | 2020-03-10 | 西门子（中国）有限公司 | Detection device and detection system of soft starter |
| CN115603275A (en) * | 2022-09-08 | 2023-01-13 | 英业达科技有限公司（Cn） | Electronic fuse type protection circuit system and electronic fuse type protection circuit thereof |
| CN115882421B (en) * | 2023-02-23 | 2023-06-23 | 杰华特微电子股份有限公司 | Electronic fuse circuit and circuit system using same |
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| WO1998043334A1 (en) * | 1997-03-24 | 1998-10-01 | Siemens Aktiengesellschaft | Electronic fuse |
| CN1518183A (en) * | 2003-01-22 | 2004-08-04 | 三美电机株式会社 | Overcurrent detecting circuit and its delay circuit |
| CN101335449A (en) * | 2007-06-29 | 2008-12-31 | 富士通天株式会社 | Power protection apparatus and electronic control unit |
| CN102570400A (en) * | 2012-03-13 | 2012-07-11 | 中国矿业大学 | Intrinsically safe high-power switch converter output short-circuit protection device and method |
| CN102629751A (en) * | 2012-04-26 | 2012-08-08 | 深圳市汉拓数码有限公司 | Over-current protection circuit |
| CN102842885A (en) * | 2011-06-22 | 2012-12-26 | 富泰华工业（深圳）有限公司 | Protecting circuit and electronic device with same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI225327B (en) * | 2003-09-10 | 2004-12-11 | Benq Corp | Power protection device and the electronic device having the same |
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2013
- 2013-03-19 CN CN201310088254.9A patent/CN104065028B/en not_active Expired - Fee Related
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| WO1998043334A1 (en) * | 1997-03-24 | 1998-10-01 | Siemens Aktiengesellschaft | Electronic fuse |
| CN1518183A (en) * | 2003-01-22 | 2004-08-04 | 三美电机株式会社 | Overcurrent detecting circuit and its delay circuit |
| CN101335449A (en) * | 2007-06-29 | 2008-12-31 | 富士通天株式会社 | Power protection apparatus and electronic control unit |
| CN102842885A (en) * | 2011-06-22 | 2012-12-26 | 富泰华工业（深圳）有限公司 | Protecting circuit and electronic device with same |
| CN102570400A (en) * | 2012-03-13 | 2012-07-11 | 中国矿业大学 | Intrinsically safe high-power switch converter output short-circuit protection device and method |
| CN102629751A (en) * | 2012-04-26 | 2012-08-08 | 深圳市汉拓数码有限公司 | Over-current protection circuit |
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| CN104065028A (en) | 2014-09-24 |
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