To develop a product, we must first select the LED lamp bead package type of the supplier, and then consider how to adapt to these package forms. There are not many opportunities for us to choose. The optical structure is built on these packages; many of our ideas cannot be very Good play. The following describes the key issues and analysis in the LED lighting design process.
First, the problems in the application of semiconductor lighting
1, heat dissipation
2, lack of standards, products are not good
3, there are problems with price and design quality, and ultimately consumers choose LED lighting, lack of confidence
4. Semiconductor lighting is very different from traditional lighting in electrical design. Traditional lighting companies need experience/skill accumulation process.
5. Everyone is optimistic about the market, but there is still no scale.
Features:
1. By adjusting the high-precision constant current chip to ensure the consistency of LED brightness and chromaticity, we provide standard, customized and reliable high-quality products for downstream customers at the module level;
2, new and old lighting design manufacturers, not too complicated electrical design, only need to add a traditional constant voltage power supply to work on the simple circuit design, is the fastest and most reliable way;
3. Solve the technical and quality problems in the LED lighting market on a large scale.
Second, the heat dissipation design
1. The shortest heat is transmitted to the path to reduce the heat conduction resistance;
2. Increase the mutual conduction area and increase the heat transfer rate;
3. Reasonable calculation of the design heat dissipation area;
4. Effective use of heat capacity effects.
Output drive voltage selection:
1. It is more suitable to drive around 48V when the mains is driven within 20W;
2, the larger power mains drive output voltage is about 36V is most suitable;
3. Most of the offline lighting is 12V and 24V.
Features:
1. Based on the serial-parallel safety, consider the appropriate driving voltage value of the load, and try to unify the voltage value to reduce the power supply design specification cost;
2. Based on safety regulations, the product design must meet the certification requirements, and the peak value of the flow exceeds 42.4Vac or the DC exceeds 60Vdc;
3. Consider the technical and quality issues of solving large-scale quantities in the LED lighting market.
Third, the most efficient back-end driver
When the output voltage is around 48V, the constant current efficiency of the low dropout linear constant current device is up to 99%, the constant current accuracy is within ±3%, and is not affected by any peripheral devices; when the output voltage is around 36V, the low dropout linear constant current device The constant current efficiency is up to 98.6%, the constant current accuracy is within ±3%, and is not affected by any peripheral devices. Even in the offline lighting part, the lower voltages of 12V and 24V have 96% and 98% efficiency, respectively; The efficiency is equal.
Features: The most efficient drive constant current architecture; the highest precision constant current mode, minimal impact by peripheral devices; simple, convenient and practical.
Fourth, the power consumption of constant current consumption has reached negligible level
At the CYT laboratory in Shenzhen, we have verified that the back-end constant current efficiency reaches 99.99375%, which is completely negligible;
In the future, we will complete this design achievement in one year. More than ten IC design teams will cooperate with powerful power supply manufacturers to complete this goal as soon as possible.
Five, AC-DC design
The development of switching power supply has been the result of many years of accumulation. In the short term, AC-DC direct constant current cannot be broken. Constant voltage and constant current are the relationship between spear and shield. They must be considered separately. The constant current source load regulation rate is 1% (mA). ) / V, can not achieve constant current effect; the more ideas, the higher the cost, and the risk is directly proportional.
Features:
1. It is most economical to make rational use of existing switching power supply resources;
2. The combination of constant pressure and constant current technology is inevitable;
3. Innovation in stable product technology is effective.
Sixth, LED combination packaging is the future development trend
The combined design of the module can effectively reduce the cost of one-time packaging; the distributed package form is beneficial to reduce the heat-dissipation design cost; the domestic aluminum-based PCB board is selected; the optical design is convenient; the power supply design is simplified; the package form is diverse; force.
Seven, the package structure 'kidnapping' our optical effect design
This is a representative package of CREE , Nichia, Lumileds, and OSRAM. To design a product, first determine which LED package structure to use; next, consider how to adapt to these package forms; there are not many opportunities for us to choose, the optical structure is built on these packages; many of our ideas can not play well .
Lighting design is ever-changing, how can we get rid of this situation?
Eight, modular packaging and constant current technology combined
Designing LED packages at the PCB board level makes it easy and cost-effective; everyone can brainstorm and develop different types of package forms; design products based on power LEDs with integrated constant current technology and light distribution parameters; effectively respond to ever-changing and ever-changing LED lamps need; the power supply part is only powered by the existing traditional switching constant voltage power supply; the product launch speed is improved, the lamp design is simple and practical, the cost is greatly reduced; and the patented containment of the leading edge LED package can be avoided.
Nine, packaged by voltage nominal value
LED constant current drive innovation technology was born in Shenzhen CYT, I named it "Power LED constant current integrated package" technology, referred to as "module package"; this technology is based on LED packaging technology directly integrated low dropout linear high precision constant Flow technology; LEDs can be directly rated voltage specifications, such as: 12V / 1W, 24V / 1W, 36V / 1W, 48V / 1W, 12V / 3W, 24V / 2W ... 36V / 10W and so on. In the future, customers using CYT technology product design, no longer need to consider any LED constant current problem, use the existing standard constant voltage power supply. This technology will announce the end of "LED constant current power supply"!
The Description of Wifi Rubber Antenna
Electrical Specifications
Frequency Range(MHz) 2300-2500
Gain(dBi) ＞5
V.S.W.R. ＜1.3
Polarization Vertical
Non-Circularity(dB) ±0.5
Impedance(Ω) 50
Lightning Protection Direct Ground
Maximum Input Power(W) 50
Mechanical Specifications
Connector Type SMA
Radiating Element Material Copper
Radome Material EVA
Radome Color Gray
Dimension (mm) 195Unbend) 173(Bend)
Wight(Kg) 0.09/12
Wifi Rubber Antenna Application Condition Indoor
Operating Temperature(℃) -40~+85
Reposition Temperature(℃) -55~+100
Connects internal WiFi to external WiFi Booster Antenna
Can be used with both indoor and outdoor antennas
Compatible with 802.11a, 802.11b, 802.11g, and 802.11n
DAS (Distributed Antenna Systems)
900MHz and Cellular applications
GSM/DCS/AWS/PCS/WCDMA/3G applications
IEEE 802.11b/g applications
Wifi Rubber Antenna
Wifi Rubber Antenna,Indoor Wifi Rubber Antenna,Wifi Black Rubber Antenna,High Gain Wifi Rubber Antenna
Shenzhen Yetnorson Technology Co., Ltd. , http://www.yetnorson.com