CN206728341U - A kind of novel protected circuit - Google Patents
A kind of novel protected circuit Download PDFInfo
- Publication number
- CN206728341U CN206728341U CN201720546858.7U CN201720546858U CN206728341U CN 206728341 U CN206728341 U CN 206728341U CN 201720546858 U CN201720546858 U CN 201720546858U CN 206728341 U CN206728341 U CN 206728341U
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- China
- Prior art keywords
- resistance
- electric capacity
- diode
- voltage
- ground connection
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- Expired - Fee Related
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Classifications
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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]
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model is a kind of novel protected circuit,Including wave filter F1,Diode D1,Voltage-regulator diode ZD1,Diode D3,Electric capacity C5,Electric capacity C6,Electric capacity C7,Electric capacity C8,Resistance R10,Switch Q1 and pulse regulation chip PWM,The wave filter F1 is connected with diode D1,One end ground connection of the diode D1,The other end respectively with electric capacity C5,Resistance R11 is connected with resistance R14,The electric capacity C5 ground connection,The resistance R11 connects with resistance R12,The resistance R14 connects with resistance R15,The resistance R12 is connected with resistance R10 and voltage-regulator diode ZD1 respectively,The circuit has the surge protection when overvoltage protection and too high surge voltage for realizing input voltage,Transient response speed has preferable protective effect to lightning surge soon,Master control IC MOS has double protection simultaneously,It is too high to hot-swappable transient voltage to serve fabulous protective effect.
Description
Technical field
It the utility model is related to LED drivings and illumination, adapter field, and in particular to a kind of novel protected circuit.
Background technology
Circuit on present society in terms of LED drives illumination is complex, and peripheral component is more, deviation is larger,
Part node is easily disturbed and causes stability to decline simultaneously, start to control it is a little inconsistent etc., using multiple triodes and voltage-stabiliser tube come reality
Existing, the voltage stabilizing point that voltage-stabiliser tube when temperature drift causes temperature too high is also easy to produce because of multiple semiconductors declines that to cause to start to control a skew larger,
Stability declines, while easily produces malfunction.
Utility model content
The technical problems to be solved in the utility model is the defects of overcoming prior art, there is provided a kind of novel protected circuit.
In order to solve the above-mentioned technical problem, the utility model provides following technical scheme：A kind of novel protected circuit,
Including wave filter F1, diode D1, voltage-regulator diode ZD1, diode D3, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance
R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, switch Q1 and
Pulse regulation chip PWM, the wave filter F1 are connected with diode D1, one end ground connection of the diode D1, the other end point
It is not connected with electric capacity C5, resistance R11 and resistance R14, the electric capacity C5 ground connection, the resistance R11 connects with resistance R12, institute
State resistance R14 to connect with resistance R15, the resistance R12 is connected with resistance R10 and voltage-regulator diode ZD1 respectively, the resistance
R10 is connected with resistance C8 and power supply respectively, and the voltage-regulator diode ZD1 ground connection, the resistance R15 is connected with resistance R13, institute
Resistance R13 ground connection is stated, the voltage-regulator diode ZD1 is also connected with resistance R16 and electric capacity C6 respectively, the electric capacity C6 ground connection, institute
It is in parallel with electric capacity C7 to state resistance R16, the resistance R16 connects with diode D3, and the diode D3 is respectively with resistance R17 and opening
Q1 is closed to be connected, resistance R17 ground connection, described switch Q1 one end is connected with resistance R18, and the other end is grounded, the resistance R18 and
Pulse regulation chip PWM is connected.
Preferably, the diode D1 includes four diodes, is bridge rectifier.
The beneficial effect that the utility model is reached is：The novel protected circuit, there is the overvoltage guarantor for realizing input voltage
Surge protection when shield and surge voltage are too high, simple circuit control, circuit are accurate, and transient response speed has to lightning surge soon
Preferable protective effect, while master control IC MOS has double protection, avoids because IC damages MOS thunderbolts for shut-off
The effect that can not be protected, it is too high to hot-swappable transient voltage to serve fabulous protective effect.
Brief description of the drawings
Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality
New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is a kind of novel protected circuit structural representation of the utility model；
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment 1
As shown in figure 1, a kind of novel protected circuit of the present embodiment, including wave filter F1, diode D1, voltage-regulator diode
ZD1, diode D3, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R10, resistance R11, resistance R12, resistance R13, resistance
R14, resistance R15, resistance R16, resistance R17, resistance R18, switch Q1 and pulse regulation chip PWM, the wave filter F1 and two
Pole pipe D1 is connected, and one end ground connection of the diode D1, the other end is connected with electric capacity C5, resistance R11 and resistance R14 respectively
Connect, the electric capacity C5 ground connection, the resistance R11 connects with resistance R12, and the resistance R14 connects with resistance R15, the resistance
R12 is connected with resistance R10 and voltage-regulator diode ZD1 respectively, and the resistance R10 is connected with resistance C8 and power supply respectively, described
Voltage-regulator diode ZD1 is grounded, and the resistance R15 is connected with resistance R13, the resistance R13 ground connection, the voltage-regulator diode ZD1
Also it is connected respectively with resistance R16 and electric capacity C6, the electric capacity C6 ground connection, the resistance R16 is in parallel with electric capacity C7, the resistance
R16 connects with diode D3, and the diode D3 is connected with resistance R17 and switch Q1 respectively, the resistance R17 ground connection, described
Switch Q1 one end is connected with resistance R18, and other end ground connection, the resistance R18 is connected with pulse regulation chip PWM, two pole
Pipe D1 includes four diodes, is bridge rectifier.
It should be noted that the utility model is when in use, by detecting CBB or electrochemical capacitor both end voltage after rectification
(such as figure C5 positions), using the characteristic of the mono- amplifiers of TL431 compared with voltage after input rectifying, while R11/R12 can be shared
IC supplying resistances, TL431 K poles are connected to IC VCC so as to realize overtension and R14, R15, R13 series connection partial pressure by R10
Inside amplifier upset K electrode potentials step-down (K electrode potentials are in 3.75V or so) during more than TL431 benchmark terminal voltage 2.5V, while because normal
It is 8.5-24V to advise PMW/PFM master control IC VCC operating voltage ranges, when voltage supplied is overturn less than 8.5V IC internal under-pressures amplifier
Into under-voltage protection pattern so as to turn off PMW/PFM, defencive function is realized.Another way control circuit is transient state lightning strike protection electricity
Road, by detecting TL431 reference edge transient voltages, R14, R15, R13 partial pressure can be crossed after lightning surge rectified filtering in R13
One transient peak voltage of upper generation makes D3 conducting NPN Q1 conducting IC driving pin drawings using the logical high frequency resistance low frequency characteristic of electric capacity
Into low potential so as to playing a part of turning off output protection MOS.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Carry out equivalent substitution.All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc.,
It should be included within the scope of protection of the utility model.
Claims (2)
1. a kind of novel protected circuit, including wave filter F1, diode D1, voltage-regulator diode ZD1, diode D3, electric capacity C5, electricity
Hold C6, electric capacity C7, electric capacity C8, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electricity
Hinder R17, resistance R18, switch Q1 and pulse regulation chip PWM, the wave filter F1 with diode D1 to be connected, the diode
D1 one end ground connection, the other end are connected with electric capacity C5, resistance R11 and resistance R14 respectively, the electric capacity C5 ground connection, the electricity
Resistance R11 connected with resistance R12, the resistance R14 connects with resistance R15, the resistance R12 respectively with resistance R10 and voltage stabilizing two
Pole pipe ZD1 is connected, and the resistance R10 is connected with resistance C8 and power supply respectively, the voltage-regulator diode ZD1 ground connection, the electricity
Resistance R15 is connected with resistance R13, and the resistance R13 is grounded, the voltage-regulator diode ZD1 also respectively with resistance R16 and electric capacity C6 phases
Even, the electric capacity C6 ground connection, the resistance R16 is in parallel with electric capacity C7, and the resistance R16 connects with diode D3, two pole
Pipe D3 is connected with resistance R17 and switch Q1 respectively, and the resistance R17 ground connection, described switch Q1 one end is connected with resistance R18, separately
One end is grounded, and the resistance R18 is connected with pulse regulation chip PWM.
A kind of 2. novel protected circuit according to claim 1, it is characterised in that:The diode D1 includes four two poles
Pipe, is bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720546858.7U CN206728341U (en) | 2017-05-17 | 2017-05-17 | A kind of novel protected circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720546858.7U CN206728341U (en) | 2017-05-17 | 2017-05-17 | A kind of novel protected circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206728341U true CN206728341U (en) | 2017-12-08 |
Family
ID=60512169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720546858.7U Expired - Fee Related CN206728341U (en) | 2017-05-17 | 2017-05-17 | A kind of novel protected circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206728341U (en) |
-
2017
- 2017-05-17 CN CN201720546858.7U patent/CN206728341U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20180517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |