CN104065028A - Electronic fuse wire device and operation method thereof - Google Patents
Electronic fuse wire device and operation method thereof Download PDFInfo
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- CN104065028A CN104065028A CN201310088254.9A CN201310088254A CN104065028A CN 104065028 A CN104065028 A CN 104065028A CN 201310088254 A CN201310088254 A CN 201310088254A CN 104065028 A CN104065028 A CN 104065028A
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Abstract
The invention discloses an electronic fuse wire device and an operation method thereof. The electronic fuse wire device is connected between a power end and a system end and mainly comprises an electronic fuse wire, a short circuit protection switch, a current detection module and a digital control module. The current detection module detects size of operation current flowing from the power end to the system end. The digital control module generates a control signal to control the electronic fuse wire. When the current detection module detects that operation current is over-current, the digital control module generates the control signal with high level to cut off the electronic fuse wire and provide over-current protection; and when the system end is in the short circuit state, the short circuit protection switch is conducted so that the electronic fuse wire is cut off and short circuit protection is provided.
Description
Technical field
The present invention is about a kind of electronic insurance silk device and method of operation thereof, espespecially a kind of electronic insurance silk device and method of operation thereof with overcurrent and short-circuit protection function.
Background technology
Electrical fuse, or claim electrical fuse (electronic fuse, E-fuse) to be disposed in various semiconductor devices, and often utilize semiconductor technology to produce to be applied in this semiconductor device.
But along with the size of integrated circuit is constantly dwindled, and because the limited design that greatly affects integrated circuit of technology, no matter be the electronics fusion method that utilizes outside laser to burn laser fusion method wiry or utilize current fusing fuse material, all will face the more and more difficult target of reaching high yield and high-reliability.
Therefore; how to design a kind of electronic insurance silk device and method of operation thereof; only need to use passive device to replace integrated circuit (the integrated circuit that tradition is complicated; IC) design and craft; when system generation overcurrent or short-circuit state; can turn-off an electrical fuse; to reach overcurrent protection and short circuit isolation protection effect; not only can reduce the development time, element cost; more can provide flexible control, be a large problem that overcomes and solve for inventor institute wish row.
Summary of the invention
An object of the present invention is to provide a kind of electronic insurance silk device, to overcome the problem of prior art.Therefore electronic insurance silk device of the present 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 a digital control module.This soft-start module receives one first voltage, with this electronic insurance silk device of soft start.This Voltage Establishment module connects this soft-start module, receives a second voltage, the Voltage Establishment so that this electronic insurance silk device soft start to be provided.This electrical fuse has a first end, one second end and a drive end, and wherein this drive end connects this soft-start module.This 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, and this second end connects this second end and this system end of this electrical fuse, and this drive end connects this Voltage Establishment module.This current detection module connects this first end of this electrical fuse, and receives this second voltage, to detect an operating current size that flows to this system end from this power end.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 operating current and is 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, this protective switch of the short circuit of conducting, to turn-off this electrical fuse, provides short-circuit protection.
Another object of the present invention is to provide a kind of method of operation of UPS, to overcome the problem of prior art.Therefore the method for operation of UPS of the present invention comprises the following step: an electrical fuse and a protective switch of the short circuit (a) are provided; (b) provide a current detection module, detect an operating current size that flows to this system end from this power end; (c) provide a digital control module, produce a control signal to control this electrical fuse; (d), when this current detection module detects this operating current and is 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, this protective switch of the short circuit of conducting, to turn-off this electrical fuse, provides short-circuit protection.
In order further to understand the present invention, reach technology, means and the effect that predetermined object is taked, refer to following about detailed description of the present invention and accompanying drawing, believe object of the present invention, feature and feature, when obtaining thus one deeply and concrete understanding, yet appended graphic only provide with reference to and explanation use, be not used for to the present invention's limitr in addition.
Accompanying drawing explanation
Fig. 1 is the calcspar of the present invention's 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 method of operation of the present invention.
Wherein, description of reference numerals is as follows:
This Fa of ﹝ Ming ﹞
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 detect 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 operating current
Vcc1 the first voltage
Vcc2 second voltage
Vth critical voltage
Sensing voltage is amplified in Vsena simulation
Vsend numeral is amplified sensing voltage
Sc control signal
Pc1 the first charge path
Pc2 the second charge path
S10～S50 step
Embodiment
Hereby, about the technical content and a detailed description, coordinate graphic being described as follows:
Refer to the calcspar that Fig. 1 is the present invention's one electronic insurance silk device.This electronic insurance silk device is connected between a power end Pt and a system end St.This electronic insurance silk device comprises a soft-start module 10, a Voltage Establishment module 20, an 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 module 10 receives one first voltage vcc 1, with this electronic insurance silk device of soft start.Wherein, this first voltage vcc 1 representative value is 18 volt DC voltages, but not as limit.This Voltage Establishment module 20 connects these soft-start modules 10, receives a second voltage Vcc2, the Voltage Establishment so that this electronic insurance silk device soft start to be provided.Wherein, this second voltage Vcc2 representative value is 12 volt DC voltages, but not as limit.This electrical fuse 30 has a first end 301, one second end 302 and a drive end 303, and 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 connects this soft-start module 10; this second end 402 connects this second end 302 and this system end St of this electrical fuse 30, and this drive end 403 connects this Voltage Establishment module 20.Wherein, this protective switch of the short circuit 40 can be a metal oxide semiconductcor field effect transistor (metal-oxide-semiconductor field-effect transistor, MOSFET), but not as limit.If the n passage MOSFET of take is example, this first end 401 is that drain electrode (drain), this second end 402 are that source electrode (source) and this drive end 403 are grid (gate).This current detection module 50 connects this first end 301 of this electrical fuse 30, and receives this second voltage Vcc2, to detect an operating current Ips size that flows to this system end St from this power end Pt.This digital control module 60 connects this current detection module 50, this soft-start module 10 and this Voltage Establishment module 20, produces a control signal Sc to control this electrical fuse 30.Wherein, when this current detection module 50 detects this operating current Ips and is overcurrent, this digital control module 60 produces this control signal Sc of high level, to turn-off this electrical fuse 30, provides overcurrent protection; When this system end St is short-circuited, this protective switch of the short circuit 40 of conducting, to turn-off this electrical fuse 30, provides short-circuit protection.
Referring to Fig. 2 is the circuit diagram of this electronic insurance silk device one preferred embodiment of the present invention.Fig. 2 further discloses the circuit element forming in the plurality of calcspar shown in Fig. 1, is a preferred embodiment of the present invention, but not as limit.This soft-start module 10 comprises a soft start capacitor 108, a soft start resistance 106, one first switch 104 and one first diode 102.This soft start resistance 106 connects this soft start capacitor 108, to receive this first voltage vcc 1.This first switch 104 has a first end 1041, one second end 1042 and a drive end 1043, and wherein this soft start capacitor 108 is connected in this first end 1041 and this second end 1042.This first diode 102 connects this drive end 1043 of this first switch 104, to receive this control signal Sc.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 voltage Vcc2.This second switch 204 has a first end 2041, one second end 2042 and a drive end 2043, and wherein this Voltage Establishment electric capacity 208 is connected in this first end 2041 and this second end 2042.This second diode 202 connects this drive end 2043 of this second switch 204, to receive this control signal Sc.
This current detection module 50 comprises one and detects resistance 502 and a sensing amplifier 504.This detects this first end 301 that resistance 502 one end connect this electrical fuse 30, and the other end connects this Voltage Establishment resistance 206 of this Voltage Establishment module 20.This sensing amplifier 504 receives this and detects a voltage difference at resistance 502 two ends, and this voltage difference is amplified to export a simulation and amplify sensing 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 analog digital converting unit 602 receives this simulation and amplifies sensing voltage Vsena, and changes this simulation and amplify sensing voltage Vsena into a digital sensing voltage Vsend that amplifies.This comparing unit 604 receives this numeral and amplifies sensing voltage Vsend and a critical voltage Vth, and wherein, when this numeral amplification sensing voltage Vsend is greater than this critical voltage Vth, this comparing unit 604 produces this control signal Sc of high level; When this numeral amplification sensing voltage Vsend is less than or equal to this critical voltage Vth, this comparing unit 604 produces low level this control signal Sc.In addition, this electronic insurance silk device also comprises a voltage regulation unit 70.This voltage regulation unit 70 is connected between this drive end 403 and this Voltage Establishment module 20 of this protective switch of the short circuit 40, to provide voltage-stabilizing protection to this protective switch of the short circuit 40.Wherein, this voltage regulation unit 70 can be a Zener diode (Zener diode).As for the operating instruction of this electronic insurance silk device, by hereinafter there being detailed elaboration.
Referring to Fig. 3 is the schematic diagram of this electronic insurance silk device soft start of the present invention and Voltage Establishment.When this electronic insurance silk device electrifying startup, this digital control module 60 produces low level this control signal Sc, now, this first switch 104 is cut-off (turned off) state with this second switch 204, therefore, this first voltage vcc 1 charges to this soft start capacitor 108 with the formed one first charge path Pc1 of this soft start capacitor 108 by this soft start resistance 106, with this electronic insurance silk device of soft start (soft start), and, after this soft start capacitor 108 is via charging, capacitance voltage increases gradually, this drive end 303 of this electrical fuse 30 of triggering and conducting.Meanwhile, this second voltage Vcc2 by this Voltage Establishment resistance 206 and the formed one second charge path Pc2 of this Voltage Establishment electric capacity 208 Voltage Establishment so that this electronic insurance silk device soft start to be provided.Wherein, this digital control module 60 can be a digital signal processor (digital signal processor, DSP), but with this, does not limit.By this, complete after soft start and Voltage Establishment, this electronic insurance silk device enters protection detected state.When the power supply (not shown) of this power end Pt is powered to the load of this system end St (not indicating), an operating current Ips who flows to this system end St from this power end Pt flow through this current detection module 50 and this electrical fuse 30.
Referring to Fig. 4 is the schematic diagram of this electronic insurance silk device overcurrent protection of the present invention.From the above, this of this current detection module 50 detects resistance 502 to detect the size of this operating current Ips.That is this operating current Ips flows through, and this detects after resistance 502, at this, detect resistance 502 two ends and can produce voltage difference, this sensing amplifier 504 amplifies to export this simulation by this voltage difference and amplifies sensing voltage Vsena.Then, this analog digital converting unit 602 receives this simulation and amplifies sensing voltage Vsena, and changes this simulation and amplify sensing voltage Vsena for this numeral amplification sensing voltage Vsend.Then, this comparing unit 604 receptions these numerals amplification sensing voltage Vsend and this critical voltage Vth compare.
When this this operating current Ips that detects resistance 502 that flows through is while being normal, that is, when this numeral amplification sensing voltage Vsend is less than or equal to this critical voltage Vth, this comparing unit 604 produces low level this control signal Sc, therefore, this first switch 104 is still cut-off (turned off) state with this second switch 204.Now, the power supply of this power end Pt is still normal powered operation to the load of this system end St.Yet, when this this operating current Ips that detects resistance 502 that flows through is overcurrent, that is, when this numeral amplification sensing voltage Vsend is greater than this critical voltage Vth, this comparing unit 604 produces this control signal Sc of high level, therefore, this first switch 104 switches to conducting (turned on) state with 204 of this second switches by cut-off (turned off) state.As shown in Figure 4; because this first switch 104 is conducting state with this second switch 204; therefore; this soft start capacitor 108 discharges via this first switch 104 and this second switch 204 respectively with this Voltage Establishment electric capacity; and; after this soft start capacitor 108 is via electric discharge; capacitance voltage reduces gradually; trigger this drive end 303 of this electrical fuse 30 of cut-off; to turn-off this electrical fuse 30; the power interruptions of this power end Pt is powered, so that overcurrent protection to be provided to the load of this system end St.
Only, above-mentioned overcurrent protection is one embodiment of the invention, more the current protection of broad sense is by being received this critical voltage Vth size by setting this digital control module 60, to reach current limit (currentlimit) function, that is, when being greater than a certain current value, this operating current (coordinates the setting of this critical voltage Vth), this comparing unit 604 produces this control signal Sc of high level, take that to switch this first switch 104 be conducting (turned on) state with this second switch 204, and then this drive end 303 of this electrical fuse 30 of triggering cut-off, to turn-off this electrical fuse 30, the power interruptions of this power end Pt is powered to the load of this system end St, so that overcurrent protection to be provided.Moreover, because the situation of overcurrent occurs also likely because moment transient state (transient) causes in system operating process, therefore, in the present invention, also can further by these digital control module 60 these numerals of judgement, amplify duration or the intensity that sensing voltage Vsend is greater than this critical voltage Vth, take and be further confirmed whether as real overcurrent abnormality state or reach current limit standard, and this control signal Sc of palpus output high level, to trigger this drive end 303 of this electrical fuse 30 of cut-off, to turn-off this electrical fuse 30, provide overcurrent protection.Or be only moment transient state action, and need not start overcurrent protection.
Referring to Fig. 5 is the schematic diagram of this electronic insurance silk device short-circuit protection of the present invention.From the above, after completing soft start and Voltage Establishment, this electronic insurance silk device enters protection detected state.When this system end St is short-circuited; the voltage of setting up due to this Voltage Establishment electric capacity 208 and this system end St bias voltage that ground connection produces that is short-circuited; cause this voltage regulation unit 70; that is this Zener diode reverse bias conducting, so this drive end 403 of this protective switch of the short circuit 40 of triggering and conducting.Once these protective switch of the short circuit 40 conductings; by making this second end 302 (being also source electrode) of this electrical fuse 30 and the voltage difference of this drive end 303 (being also grid), be zero (that is the gate-source voltage of this electrical fuse 30 is zero); therefore; turn-off this electrical fuse 30, so that short circuit isolation protection to be provided.Be worth mentioning; because short trouble is comparatively serious for device and the element impact of whole system; therefore; once system end, St is short-circuited; if receive short circuit abnormality detection via this digital control module 60, then through communication and computational process, until short circuit isolation is got rid of; required time is longer, and the most effective short trouble protection cannot be provided.Therefore, directly utilize in the present invention the hardware element characteristic of this electronic insurance silk device, instant rapidly short circuit isolation protection is provided.
Referring to Fig. 6 is the flow chart of this electronic insurance silk device method of operation of the present invention.This electronic insurance silk device is connected between a power end and a system end.The step that this electronic insurance silk device method of operation comprises is as described below.First, provide an electrical fuse and a protective switch of the short circuit (S10).Wherein, this protective switch of the short circuit can be a metal oxide semiconductcor field effect transistor (metal-oxide-semiconductor field-effect transistor, MOSFET), but not as limit.Be worth mentioning, in step (S10) before, also comprise a soft-start module and a Voltage Establishment module are provided.This soft-start module receives one first voltage, with this electronic insurance silk device of soft start.This Voltage Establishment module receives a second voltage, the Voltage Establishment so that this electronic insurance silk device soft start to be provided.Wherein, this soft-start module comprises a soft start capacitor, a soft start resistance, one first switch and one first diode.This soft start resistance connects this soft start capacitor, to receive this first voltage.This first switch has a first end, one second end and a drive end, and wherein this soft start capacitor is connected in 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 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 end, and wherein this Voltage Establishment electric capacity is connected in this first end and this second end.This second diode connects this drive end of this second switch, to receive this control signal.
Then, provide a current detection module, detect an operating current size (S20) that flows to this system end from this power end.Wherein, this current detection module comprises one and detects resistance and a sensing amplifier.This detects resistance one end and connects this electrical fuse, and the other end connects this Voltage Establishment resistance of this Voltage Establishment module.This sensing amplifier receives this voltage difference that detects resistance two ends, and this voltage difference is amplified to export a simulation and amplify sensing voltage.Then, provide a digital control module, produce 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, this digital control module produces low level this control signal, take that to control this first switch and this second switch be cut-off (turned off) state, this first voltage charges to this soft start capacitor by this soft start resistance and formed one first charge path of this soft start capacitor, with this electronic insurance silk device of soft start (soft start); This second voltage is the Voltage Establishment so that this electronic insurance silk device soft start to be provided by this Voltage Establishment resistance and formed one second charge path of this Voltage Establishment electric capacity.Wherein, this digital control module comprises an analog digital converting unit and a comparing unit.This analog digital converting unit receives this simulation and amplifies sensing voltage, and changes this simulation and amplify sensing voltage into a numeral amplification sensing voltage.This comparing unit receives this numeral and amplifies sensing voltage and a critical voltage, and wherein, when this numeral amplification sensing voltage is greater than this critical voltage, this comparing unit produces this control signal of high level; When this numeral amplification sensing voltage is less than or equal to this critical voltage, this comparing unit produces low level this control signal.
When this current detection module detects this operating current and is overcurrent, this digital control module produces this control signal of high level, to turn-off this electrical fuse, provides overcurrent protection (S40).In specific words; when this this operating current that detects resistance of flowing through is overcurrent; this numeral is amplified sensing voltage and is greater than this critical voltage; this comparing unit produces this control signal of high level; take and switch this first switch and this second switch by ending (turned off) state as conducting (turned on) state; and then trigger this drive end that ends this electrical fuse, to turn-off this electrical fuse, provide overcurrent protection.
When this system end is short-circuited, this protective switch of the short circuit of conducting, to turn-off this electrical fuse, provides short-circuit protection (S50).Be worth mentioning, the step of this electronic insurance silk device method of operation also comprises provides a voltage regulation unit, is connected between this drive end and this Voltage Establishment module of this protective switch of the short circuit, to provide voltage-stabilizing protection to this protective switch of the short circuit.When this system end is short-circuited, this voltage regulation unit reverse bias conducting, this drive end of this protective switch of the short circuit of triggering and conducting, provides short circuit isolation protection to turn-off this electrical fuse.
In sum, the present invention has following feature & benefits:
1, only need to use passive device, replace integrated circuit (integrated circuit, the IC) design and craft that tradition is complicated, not only can reduce the development time, element cost, more can provide flexible control;
2, this electronic insurance silk device and method of operation thereof have overcurrent protection (comprising current limit function) and short circuit isolation protection;
3, utilize this digital control module 60, can realize it by digital signal processor, provide more precisely, more flexible overcurrent protection controls; And
4, directly utilize the hardware element characteristic of this electronic insurance silk device, provide instant rapidly short circuit isolation protection, to reduce the caused injury of short trouble.
Only, the above, only for the detailed description of preferred embodiment of the present invention and graphic, only feature of the present invention is not limited to this, not in order to limit the present invention, all scopes of the present invention should be as the criterion to apply for a patent claim scope, all closing in the embodiment of the spirit variation similar with it of the present patent application Patent right requirement scope, all should be contained in category of the present invention, any those skilled in the art in the field of the invention, can think easily and variation or modify and all can be encompassed in following Patent right requirement scope of the present invention.
Claims (15)
1. an 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 one first voltage, with this electronic insurance silk device of soft start;
One Voltage Establishment module, connects this soft-start module, receives a second voltage, the Voltage Establishment so that this electronic insurance silk device soft start to be provided;
One electrical fuse, has a first end, one second end and a drive end, and wherein this drive end connects this soft-start module;
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, and 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 an operating current size that flows to this system end from this power end; And
One 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 operating current and is 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, this protective switch of the short circuit of conducting, 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, and wherein this soft start capacitor is connected in 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, and wherein this Voltage Establishment electric capacity is connected in this first 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 detects resistance, and one end connects this first end of this electrical fuse, and the other end connects this Voltage Establishment resistance of this Voltage Establishment module; And
One sensing amplifier, receives the voltage difference that this detects resistance two ends, and this voltage difference is amplified to export a simulation and amplify sensing voltage; And
This digital control module comprises:
One analog digital converting unit, receives this simulation and amplifies sensing voltage, and changes this simulation and amplify sensing voltage into a numeral amplification sensing voltage; And
One comparing unit, receives this numeral and amplifies sensing voltage and a critical voltage, and wherein, when this numeral amplification sensing voltage is greater than this critical voltage, this comparing unit produces this control signal of high level; When this numeral amplification sensing voltage is less than or equal to this critical voltage, this comparing unit produces low level this control signal.
3. electronic insurance silk device as claimed in claim 1, when wherein electronic insurance silk device starts, this digital control module produces low level this control signal, 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 module produces low level this control signal, take and control this first switch and this second switch is cut-off state, this first voltage charges to this soft start capacitor by this soft start resistance and formed one first charge path of this soft start capacitor, with this electronic insurance silk device of soft start; This second voltage is the Voltage Establishment so that this electronic insurance silk device soft start to be provided by this Voltage Establishment resistance and formed one second charge path of this Voltage Establishment electric capacity.
5. electronic insurance silk device as claimed in claim 2; wherein when this this operating current that detects resistance of flowing through is overcurrent; this numeral is amplified sensing voltage and is greater than this critical voltage; this comparing unit produces this control signal of high level; take and switch this first switch and this second switch is conducting state by cut-off state; and then trigger this drive end that ends this electrical fuse, to turn-off this electrical fuse, provide overcurrent protection.
6. electronic insurance silk device as claimed in claim 2, wherein also comprises a voltage regulation unit, is connected between this drive end and this Voltage Establishment module of this protective switch of the short circuit, 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 reverse bias conducting, this drive end of this protective switch of the short circuit of triggering and conducting, provides short circuit isolation protection to turn-off this electrical fuse.
8. a method of operation for electronic insurance silk device, this electronic insurance silk device is connected between a power end and a system end, and this method of operation comprises the following step:
(a) provide an electrical fuse and a protective switch of the short circuit;
(b) provide a current detection module, detect an operating current size that flows to this system end from this power end;
(c) provide a digital control module, produce a control signal to control this electrical fuse;
(d), when this current detection module detects this operating current and is overcurrent, this digital control module produces this control signal of high level, to turn-off this electrical fuse, provides overcurrent protection; And
(e), when this system end is short-circuited, this protective switch of the short circuit of conducting, to turn-off this electrical fuse, provides short-circuit protection.
9. the method for operation of electronic insurance silk device as claimed in claim 8, wherein also comprises before in step (a):
(a1) provide a soft-start module, receive one first voltage, with this electronic insurance silk device of soft start; And
(a2) provide a Voltage Establishment module, receive a second voltage, the Voltage Establishment so that this electronic insurance silk device soft start to be provided.
10. the method for operation of electronic insurance silk device as claimed in claim 9, 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, and wherein this soft start capacitor is connected in 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, and wherein this Voltage Establishment electric capacity is connected in this first 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 detects resistance, and 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 the voltage difference that this detects resistance two ends, and this voltage difference is amplified to export a simulation and amplify sensing voltage; And
This digital control module comprises:
One analog digital converting unit, receives this simulation and amplifies sensing voltage, and changes this simulation and amplify sensing voltage into a numeral amplification sensing voltage; And
One comparing unit, receives this numeral and amplifies sensing voltage and a critical voltage, and wherein, when this numeral amplification sensing voltage is greater than this critical voltage, this comparing unit produces this control signal of high level; When this numeral amplification sensing voltage is less than or equal to this critical voltage, this comparing unit produces low level this control signal.
The method of operation of 11. electronic insurance silk devices as claimed in claim 9, when wherein electronic insurance silk device starts, this digital control module produces low level this control signal, to complete soft start and Voltage Establishment.
The method of operation of 12. electronic insurance silk devices as claimed in claim 10, wherein when electronic insurance silk device starts, this digital control module produces low level this control signal, take and control this first switch and this second switch is cut-off state, this first voltage charges to this soft start capacitor by this soft start resistance and formed one first charge path of this soft start capacitor, with this electronic insurance silk device of soft start; This second voltage is the Voltage Establishment so that this electronic insurance silk device soft start to be provided by this Voltage Establishment resistance and formed one second charge path of this Voltage Establishment electric capacity.
The method of operation of 13. electronic insurance silk devices as claimed in claim 10; wherein when this this operating current that detects resistance of flowing through is overcurrent; this numeral is amplified sensing voltage and is greater than this critical voltage; this comparing unit produces this control signal of high level; take and switch this first switch and this second switch is conducting state by cut-off state; and then trigger this drive end that ends this electrical fuse, to turn-off this electrical fuse, provide overcurrent protection.
The method of operation of 14. electronic insurance silk devices as claimed in claim 10, wherein the method further comprises:
One voltage regulation unit is provided, is connected between this drive end and this Voltage Establishment module of this protective switch of the short circuit, to provide voltage-stabilizing protection to this protective switch of the short circuit.
The method of operation of 15. electronic insurance silk devices as claimed in claim 14; wherein when this system end is short-circuited; this voltage regulation unit reverse bias conducting, this drive end of this protective switch of the short circuit of triggering and conducting, provides short circuit isolation protection to turn-off this electrical fuse.
Priority Applications (1)
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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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| CN201310088254.9A CN104065028B (en) | 2013-03-19 | 2013-03-19 | Electronic insurance silk device and its operational approach |
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| 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 |
| CN115882421A (en) * | 2023-02-23 | 2023-03-31 | 杰华特微电子股份有限公司 | Electronic fuse circuit and circuit system applying same |
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| CN104065028B (en) | 2017-03-01 |
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