CN208112595U - A kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit - Google Patents
A kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit Download PDFInfo
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- CN208112595U CN208112595U CN201821232786.XU CN201821232786U CN208112595U CN 208112595 U CN208112595 U CN 208112595U CN 201821232786 U CN201821232786 U CN 201821232786U CN 208112595 U CN208112595 U CN 208112595U
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Abstract
The utility model discloses a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, including circuit board, spread spectrum circuit, RC circuit and row's capacitor are integrated on the circuit board, spread spectrum circuit, RC circuit and row's capacitor are sequentially connected electrically.This LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit modulates the amplitude of spread spectrum output by adjusting the resistance value size of resistance R137, resistance R129, resistance R131, resistance R132, resistance R133 and resistance R134 to solve EMI interference problem；Spread spectrum circuit is modulated processing to the spike clock of CLK clock signal, so that spike energy is distributed to multiple frequency bands in spread spectrum region, reaches reduction spike energy, inhibits the effect of EMI；And clock is reduced in the amplitude of fundamental frequency and odd harmonic frequencies, achievees the purpose that reduction system electromagnetic radiation peak value；RC circuit plays the role of inhibiting EMI interference.
Description
Technical field
The utility model relates to LED screen HUB pinboard technical field, specially a kind of LED screen HUB pinboard electromagnetic compatibility
EMC interference rejection unit.
Background technique
With the development of full-color LED display screen, various interface definition are presented on the market, since LED is mono- double-colored aobvious
Display screen it is a large amount of universal, the old and new regenerate, and cabling mode and interface have defined very big variation, and LED full-color display screen is also gradually
It is universal come, more occasion information issue the higher technologies of demand, and requirement of the people to color is also higher and higher, this causes
The control system of many LED displays can not good cooperating, control card needs and the cooperation of pinboard can just allow it is aobvious
Display screen has optimal display effect.The accessory that adapter will connect between the LED board and controller of distinct interface, due to control
Fabrication is general, and LED unit module has many models, and LED screen pinboard is a bridge between control panel and LED module
Beam, it is set forth above to solve the problems, such as, therefore propose a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit.
Utility model content
The purpose of this utility model is to provide a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, tools
There is design simply, at low cost, small in size, light-weight, the advantage that can quickly inhibit the interference source of EMI, various LED screens generally applicable,
Solve the problems, such as that the control system of LED display in the prior art can not good cooperating.
To achieve the above object, the utility model provides the following technical solutions：A kind of LED screen HUB pinboard electromagnetic compatibility
EMC interference rejection unit, including circuit board are integrated with spread spectrum circuit, RC circuit and row's capacitor, spread spectrum electricity on the circuit board
Road, RC circuit and row's capacitor are sequentially connected electrically.
Preferably, the spread spectrum circuit includes chip U50, and the 1 series resistor R137 of foot of chip U50 connects CLK input, core
The 2 series resistor R136 of foot of piece U50 meets power end VDD33, the input terminal of the 3 connecting resistance R128 connecting resistance R136 of foot of chip U50,
The foot 4 of chip U50 is grounded, and 8 serial capacitance C130 of the foot ground connection of chip U50, the input of capacitor C130 terminates power end VDD33,
The foot 7 of chip U50 connects series resistor R133 ground connection, 6 connecting resistance R131 of the foot ground connection of chip U50, the output termination of resistance R131
The input terminal of resistance R133, the output end of the input terminating resistor R134 connecting resistance R133 of resistance R131, the foot 5 of chip U50 are gone here and there
Connecting resistance R129 connects RC circuit.
Preferably, the model SSC89 of the chip U50.
Preferably, the RC circuit includes resistance R135 and capacitor C131, and capacitor C131's inputs terminating resistor R129's
Output end, the output end of the capacitor C131 capacitor that runs in connect CLK output end, the input terminating resistor R135 ground connection of capacitor C131, electricity
Hinder the output end of the output end shunt-wound capacitance C131 of R135.
Compared with prior art, the beneficial effects of the utility model are as follows：
This LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, by adjusting resistance R137, resistance R129, electricity
The resistance value size of R131, resistance R132, resistance R133 and resistance R134 are hindered to modulate the amplitude of spread spectrum output and interfere to solve EMI
Problem；CLK clock signal is modulated processing to spike clock by spread spectrum circuit, it is made to become one from a narrow band clock
Frequency spectrum with sideband harmonic wave, to reach multiple frequency bands that spike energy is distributed to spread spectrum region, reaching reduces spike energy
Amount, inhibits the effect of EMI；The power dissipation that clock spread spectrum will focus within the scope of narrow-band by warbled means is to setting
Fixed broad frequency range reaches reduction system electromagnetic radiation peak by reducing clock in the amplitude of fundamental frequency and odd harmonic frequencies
The purpose of value；Increasing RC circuit in 5 output end of foot of chip U50 can inhibit the interference of EMI；Spread spectrum circuit and RC circuit are using member
Device is few, so that whole design is simple, it is at low cost, it is small in size, it is light-weight, and can quickly inhibit the interference source of EMI, it is various
LED screen is generally applicable.
Detailed description of the invention
Fig. 1 is the integral module figure of the utility model；
Fig. 2 is the circuit diagram of the utility model；
Fig. 3 is the increase spread spectrum circuit waveform figure of the utility model；
Fig. 4 does not increase spread spectrum circuit waveform figure for the utility model.
In figure：1, circuit board；2, spread spectrum circuit；3, RC circuit；4, capacitor is arranged.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-4, a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, including circuit board 1 are please referred to, electricity
Spread spectrum circuit 2, RC circuit 3 and row's capacitor 4 are integrated on road plate 1, spread spectrum circuit 2, RC circuit 3 and row's capacitor 4 are sequentially connected electrically；
Spread spectrum circuit 2 includes chip U50, and the 1 series resistor R137 of foot of the model SSC89 of chip U50, chip U50 connect CLK input
End, the 2 series resistor R136 of foot of chip U50 meet power end VDD33, and the 3 connecting resistance R128 connecting resistance R136's of foot of chip U50 is defeated
Enter end, the foot 4 of chip U50 is grounded, and 8 serial capacitance C130 of the foot ground connection of chip U50, the input of capacitor C130 terminates power end
The foot 7 of VDD33, chip U50 connect series resistor R133 ground connection, and 6 connecting resistance R131 of the foot ground connection of chip U50, resistance R131's is defeated
The input terminal of terminating resistor R133 out, the output end of the input terminating resistor R134 connecting resistance R133 of resistance R131, chip U50's
5 series resistor R129 of foot connects RC circuit 3；RC circuit 3 includes resistance R135 and capacitor C131, the input terminating resistor of capacitor C131
The output end of R129, the output end of the capacitor C131 capacitor 4 that runs in meet CLK output end, the input terminating resistor R135 of capacitor C131
Ground connection, the output end of the output end shunt-wound capacitance C131 of resistance R135.
LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, the CLK clock signal of LED screen pass through resistance
R137 is input to the foot 1 of chip U50, by exporting clock signal in the foot 5 of chip U50 and foot 129 after frequency exhibition, passes through adjusting
Resistance R137, resistance R129, resistance R131, resistance R132, the resistance value size of resistance R133 and resistance R134 are defeated to modulate spread spectrum
Amplitude out solves EMI interference problem；CLK clock signal is modulated processing to spike clock by spread spectrum circuit 2, makes it
Become the frequency spectrum with sideband harmonic wave from a narrow band clock, so that reaching spike energy is distributed to the multiple of spread spectrum region
Frequency band reaches reduction spike energy, inhibits the effect of EMI；Clock spread spectrum will focus on narrow frequency by warbled means
With the power dissipation in range to setting broad frequency range, by reduce clock fundamental frequency and odd harmonic frequencies amplitude,
Achieve the purpose that reduction system electromagnetic radiation peak value；Since pinboard and lamp plate are apart from distant, between pinboard and lamp plate
It is connected by winding displacement, the too long formation antenna effect of winding displacement, so output end, that is, chip U50 5 output end of foot in winding displacement increases
RC circuit 3 can inhibit the interference of EMI.
In summary：This LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, by adjusting resistance R137, electricity
Resistance R129, resistance R131, resistance R132, resistance R133 and resistance R134 resistance value size solved to modulate the amplitude of spread spectrum output
Certainly EMI interference problem；CLK clock signal is modulated processing to spike clock by spread spectrum circuit 2, when making it from a narrowband
Clock becomes the frequency spectrum with sideband harmonic wave and reaches to reach multiple frequency bands that spike energy is distributed to spread spectrum region
Spike energy is reduced, the effect of EMI is inhibited；Clock spread spectrum will focus on the energy within the scope of narrow-band by warbled means
Amount is distributed to the broad frequency range of setting, by reducing clock in the amplitude of fundamental frequency and odd harmonic frequencies, reaches reduction system
The purpose of electromagnetic radiation peak value；Increasing RC circuit 3 in 5 output end of foot of chip U50 can inhibit the interference of EMI；2 He of spread spectrum circuit
RC circuit 3 is few using component, so that whole design is simple, it is at low cost, it is small in size, it is light-weight, and can quickly inhibit EMI's
Interference source, various LED screens are generally applicable.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit, including circuit board (1), it is characterised in that：It is described
Spread spectrum circuit (2), RC circuit (3) and row capacitor (4), spread spectrum circuit (2), RC circuit (3) and row's electricity are integrated on circuit board (1)
Hold (4) to be sequentially connected electrically.
2. a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit according to claim 1, feature exist
In：The spread spectrum circuit (2) includes chip U50, and the 1 series resistor R137 of foot of chip U50 connects CLK input, the foot of chip U50
2 series resistor R136 meet power end VDD33, the input terminal of the 3 connecting resistance R128 connecting resistance R136 of foot of chip U50, chip U50's
Foot 4 is grounded, and 8 serial capacitance C130 of the foot ground connection of chip U50, the input of capacitor C130 terminates power end VDD33, chip U50's
Foot 7 connects series resistor R133 ground connection, and 6 connecting resistance R131 of the foot ground connection of chip U50, resistance R131's exports terminating resistor R133's
Input terminal, the output end of the input terminating resistor R134 connecting resistance R133 of resistance R131, the 5 series resistor R129 of foot of chip U50
Connect RC circuit (3).
3. a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit according to claim 2, feature exist
In：The model SSC89 of the chip U50.
4. a kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit according to claim 1, feature exist
In：The RC circuit (3) includes resistance R135 and capacitor C131, the output end of the input terminating resistor R129 of capacitor C131, electricity
The output end capacitor (4) that runs in for holding C131 connects CLK output end, the input terminating resistor R135 ground connection of capacitor C131, resistance R135
Output end shunt-wound capacitance C131 output end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821232786.XU CN208112595U (en) | 2018-08-01 | 2018-08-01 | A kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821232786.XU CN208112595U (en) | 2018-08-01 | 2018-08-01 | A kind of LED screen HUB pinboard electromagnetic compatibility EMC interference rejection unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912473A (en) * | 2019-11-08 | 2020-03-24 | 惠州市德赛西威汽车电子股份有限公司 | Control system and method for preventing motor radiation |
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2018
- 2018-08-01 CN CN201821232786.XU patent/CN208112595U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912473A (en) * | 2019-11-08 | 2020-03-24 | 惠州市德赛西威汽车电子股份有限公司 | Control system and method for preventing motor radiation |
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