CN206993461U - A kind of hot drawing burst current absorbing circuit - Google Patents
A kind of hot drawing burst current absorbing circuit Download PDFInfo
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- CN206993461U CN206993461U CN201720919600.7U CN201720919600U CN206993461U CN 206993461 U CN206993461 U CN 206993461U CN 201720919600 U CN201720919600 U CN 201720919600U CN 206993461 U CN206993461 U CN 206993461U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model discloses a kind of hot drawing burst current absorbing circuit, including switching S1, the output end and connecting resistance R2 and LED of the switch S1, the output end concatenation FET Q2 of LED colelctor electrode, between FET Q2 colelctor electrode and emitting stage and voltage-regulator diode ZD2 is met, FET Q2 base stage series resistor R1 is connected with triode Q2 colelctor electrode.The resistance R11 of the hot drawing burst current absorbing circuit is used for the value for setting inrush currents trigger protection; assuming that triode Q1 base stages are 0.7V to the junction voltage of emitting stage; resistance R11 is then set as 0.7 ohm; trigger triode Q1 is turned on when output voltage is more than 1A; move FET Q2 grid to low level; FET Q2 ends; the exergonic time lengthening so contributed on big electrochemical capacitor C1; its damage is caused by LED etc., so as to avoid in the short time high current the problem of damage；It is overall good to LED protecting effect.
Description
Technical field
LED drive power technical field is the utility model is related to, especially a kind of hot drawing burst current absorbing circuit.
Background technology
In the fitting structure of LED drivings and lamp holder (lamp holder, bulb) separation, electrician is changing lamp holder (lamp holder, bulb)
When because field application situation or non-standard operation are possible to not power off and directly plug, the action of this hot plug
The damage that can cause LED lamp bead is possible to, because LED drive power typically output has a big electrolytic capacitor filter, and
And floating voltage will be typically higher than the LED strip voltage VF that actual band carries, so in the moment of LED lamp holder contact, big electrochemical capacitor
On energy can flow through LED in the short time, cause the electric current that transient state is huge, energy value I^2t (or C Δ V), so this transient state
High current easily causes LED hot-spot damage or damage, is exactly that output connects one to solve this problem in general way
Individual NTC resistance, or suppressed by a kind of special IC, it can not accomplish limit value current value to very little using NTC, and use IC mono-
Next expensive, two, which carry out IC, start-up study, loses inhibitory action to the surging of us levels, therefore need a kind of hot drawing burst current to inhale
Receive circuit.
Utility model content
The purpose of this utility model is to provide a kind of hot drawing burst current absorbing circuit have to LED protecting effect
The advantages of good, to solve the problems, such as that continuous electric heating plug action can cause damage to LED lamp bead in above-mentioned background technology.
To achieve the above object, the utility model provides following technical scheme：A kind of hot drawing burst current absorbing circuit, bag
Include switch S1, the switch S1 input concatenation voltage-regulator diode D1 output end, voltage-regulator diode D1 input concatenation
Transformer T1 output end；The both ends shunt-wound capacitance C1 of the voltage-regulator diode D1, electric capacity C1 a termination transformer T1's is defeated
Go out end, electric capacity C1 another termination switch S1 input；The output end and connecting resistance R2 and light emitting diode of the switch S1
LED, the output end concatenation FET Q2 of LED colelctor electrode, between FET Q2 colelctor electrode and emitting stage
And voltage-regulator diode ZD2 is met, FET Q2 base stage series resistor R1 is connected with triode Q2 colelctor electrode, triode Q1's
Base stage concatenates FET Q2 emitting stages, and voltage-regulator diode ZD1, triode Q1 base stage string are concatenated between triode Q1 and resistance R2
Meet voltage-regulator diode ZD1 input, voltage-regulator diode ZD1 output end connection resistance R2；The base stage of the triode Q1 with
Between emitting stage and connecting resistance R11, resistance R11 output head grounding.
As further program of the utility model：The resistance of the resistance R11 and the product of electric current are more than triode Q1
Junction voltage when, triode Q1 conducting.
As further program of the utility model：The switch S1 is the hot-swappable of simulation.
Compared with prior art, the beneficial effects of the utility model are as follows：
The switch S1 of the hot drawing burst current absorbing circuit is the hot-swappable of simulation, and resistance R11 is used to set inrush currents
The value of trigger protection, it is assumed that triode Q1 base stages are 0.7V to the junction voltage of emitting stage, then resistance R11 are set as 0.7 ohm, when defeated
Going out voltage to turn on regard to trigger triode Q1 more than 1A, move FET Q2 grid to low level, FET Q2 ends,
The exergonic time lengthening so contributed on big electrochemical capacitor C1, pass through LED so as to avoid high current in the short time
Etc. causing its damage, the problem of damage；It is overall good to LED protecting effect.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of hot drawing burst current absorbing circuit, including switch S1, switch
S1 input concatenation voltage-regulator diode D1 output end, voltage-regulator diode D1 input series transformer T1 output end；
Voltage-regulator diode D1 both ends shunt-wound capacitance C1, electric capacity C1 a termination transformer T1 output end, electric capacity C1 another termination
Switch S1 input；Switch S1 output end and connecting resistance R2 and LED, the output end of LED
FET Q2 colelctor electrode is concatenated, between FET Q2 colelctor electrode and emitting stage and connects voltage-regulator diode ZD2, FET
Q2 base stage series resistor R1 is connected with triode Q2 colelctor electrode, triode Q1 base stage concatenation FET Q2 emitting stages,
Voltage-regulator diode ZD1 is concatenated between triode Q1 and resistance R2, triode Q1 base stage concatenates voltage-regulator diode ZD1 input,
Voltage-regulator diode ZD1 output end connection resistance R2；Between triode Q1 base stage and emitting stage and connecting resistance R11, resistance R11's
When output head grounding, resistance R11 resistance and the product of electric current are more than triode Q1 junction voltage, triode Q1 conductings；Switch
S1 is the hot-swappable of simulation, and resistance R11 is used for the value for setting inrush currents trigger protection, it is assumed that triode Q1 base stages are to emitting stage
Junction voltage be 0.7V, then set resistance R11 as 0.7 ohm, when output voltage be more than 1A with regard to trigger triode Q1 turn on, field is imitated
Should pipe Q2 grid move low level to, FET Q2 ends, and so contributes to exergonic on big electrochemical capacitor C1
Time lengthening, its damage is caused by LED etc. so as to avoid in the short time high current, the problem of damage；It is overall that LED is protected
It is good to protect effect.
In summary：The switch S1 of the hot drawing burst current absorbing circuit is the hot-swappable of simulation, and resistance R11 is used to set
The value of inrush currents trigger protection, it is assumed that triode Q1 base stages are 0.7V to the junction voltage of emitting stage, then set resistance R11 as 0.7
Ohm, trigger triode Q1 is turned on when output voltage is more than 1A, moves FET Q2 grid to low level, FET
Q2 ends, the exergonic time lengthening so contributed on big electrochemical capacitor C1, so as to avoid big electricity in the short time
Stream causes its damage by LED etc., the problem of damage；It is overall good to LED protecting effect.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of hot drawing burst current absorbing circuit, including switch S1, it is characterised in that：The input concatenation of the switch S1 is steady
Press diode D1 output end, voltage-regulator diode D1 input series transformer T1 output end；The voltage-regulator diode D1
Both ends shunt-wound capacitance C1, electric capacity C1 termination transformer T1 output end, electric capacity C1 another termination switch S1 input
End；The output end and connecting resistance R2 and LED of the switch S1, the output end concatenation field effect of LED
Should pipe Q2 colelctor electrode, between FET Q2 colelctor electrode and emitting stage and connect voltage-regulator diode ZD2, FET Q2 base stage
Series resistor R1 is connected with triode Q2 colelctor electrode, triode Q1 base stage concatenation FET Q2 emitting stages, triode Q1
Voltage-regulator diode ZD1, triode Q1 base stage concatenation voltage-regulator diode ZD1 input, the pole of voltage stabilizing two are concatenated between resistance R2
Pipe ZD1 output end connection resistance R2；Between the base stage and emitting stage of the triode Q1 and connecting resistance R11, resistance R11 output
End ground connection.
A kind of 2. hot drawing burst current absorbing circuit according to claim 1, it is characterised in that：The resistance of the resistance R11
When value and the product of electric current are more than triode Q1 junction voltage, triode Q1 conductings.
A kind of 3. hot drawing burst current absorbing circuit according to claim 1, it is characterised in that：The switch S1 is simulation
It is hot-swappable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720919600.7U CN206993461U (en) | 2017-07-26 | 2017-07-26 | A kind of hot drawing burst current absorbing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720919600.7U CN206993461U (en) | 2017-07-26 | 2017-07-26 | A kind of hot drawing burst current absorbing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206993461U true CN206993461U (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720919600.7U Active CN206993461U (en) | 2017-07-26 | 2017-07-26 | A kind of hot drawing burst current absorbing circuit |
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| CN (1) | CN206993461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934304A (en) * | 2020-09-02 | 2020-11-13 | 苏州浪潮智能科技有限公司 | Protection circuit and protection method for preventing hot plug voltage surge |
-
2017
- 2017-07-26 CN CN201720919600.7U patent/CN206993461U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934304A (en) * | 2020-09-02 | 2020-11-13 | 苏州浪潮智能科技有限公司 | Protection circuit and protection method for preventing hot plug voltage surge |
| CN111934304B (en) * | 2020-09-02 | 2022-12-20 | 苏州浪潮智能科技有限公司 | Protection circuit and protection method for preventing hot plug voltage surge |
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