Shenzhen Mingwei Electronics Co., Ltd. (hereinafter referred to as “Mingwei Electronicsâ€), as a well-known enterprise of domestic drive ICs, has been keeping up with changes in the market and continuous technological innovation. After more than 10 years of technology accumulation and precipitation, its LED drive technology is at Leading domestic level, its products occupy a large market share in the fields of LED lighting and display.
"There are many companies that drive ICs in the market, and each has its own advantages." Zhao Chunbo, head of Mingwei Electronics Marketing Department, told the reporter of "High-tech LED", "The most prominent place of our SM73XX series products is to adopt Single-chip high-voltage integrated process technology, high-precision constant-current control technology, high-voltage self-starting and power supply technology, etc. The application system does not require a startup circuit, does not require a power supply circuit, does not require compensation components, has fewer overall components, and has high system accuracy and efficiency. High and cost-effective."
Zhao Chunbo’s SM73XX series is also the product of Mingwei Electronics’ strong competition for the Golden Globe Award this year.
In line with the purpose and purpose of "promoting LED good products and promoting LED good brand", the 2014 (5th) High-tech Golden Globe Award--Annual LED Good Product Selection has been opened. Known as the "Oscar for the LED industry", this year, it attracts many well-known companies in the industry to participate.
The reporter learned that the SM73XX series is a non-isolated LED lighting driver IC that supports a full voltage input range of 85~265Vac, with a system efficiency of over 90%. It uses a 730V high-voltage single-chip integrated process, mainly used in LED T tubes and bulbs. , ceiling lamps and filament lamps.
Specifically, the SM73XX is a non-isolated BUCK LED constant current drive control chip. High-voltage self-starting and power supply technology eliminates the need for auxiliary windings to provide power and achieves constant output current without any compensating components. At the same time, the SM7315P is compatible with the PCB of the SM7307, which can omit the feedback loop and make the circuit more compact. The figure below shows the schematic diagram of the typical application circuit of the SM7307, while the SM7315P system does not require R1 and R2.
The SM7313 is a high precision and high efficiency small volume non-isolated LED constant current drive control chip. The chip adopts the BUCK circuit structure and works in a fixed frequency mode. It only needs to use a relatively small chip inductor to realize an output small current and high voltage scheme within 5W. The constant current accuracy can reach ±3% of the full voltage range, with few external components and low solution cost.
The SM7313 is the industry's first filament light switch power supply driver solution that supports plastic-free parts and is placed directly into the E14 lamp head (see Figure b below, the solution board diameter is only 13.6mm).
(a) SM7313 schematic 
With the gradual maturity of driver IC technology, market homogenization is becoming more and more serious. Only innovative design can improve product performance and better adapt to market development. Li Zhaohua, deputy general manager of Mingwei Electronics, once said at the 2014 China LED Lighting Supply Chain Good Product Tour Symposium hosted by Gaogong LED, “The current power module technology is relatively mature, and the competition is more reflected in product innovation and cost performance.â€
At present, the 2014 (5th) High-tech Golden Globe Award--Annual LED Good Product Selection has entered the WeChat voting stage: August 1-7 is the pre-registration time for voting, August 8-September 30 is WeChat Formal voting stage.
If you have already paid attention to the official WeChat of Gaogong LED, please click the "Golden Ball Award - Voting Pre-registration" menu bar under the official WeChat of Gaogong LED Network for pre-registration.
If you haven't paid attention to the high-tech LED WeChat, please pay attention to the official WeChat (micro-signal: weixin-gg-led) of the high-tech LED network, and then click on the menu bar "Golden Ball Award - Voting Pre-registration" under the official WeChat LED Registration.
About the Golden Globe Award:
The industry research and media organization authoritative in the LED lighting industry---the high-tech Golden Globe Award of the high-tech LED organization--LED good product selection, aiming to jointly recommend and select the LED products with credibility in the industry to encourage Enterprises strive to be the spirit of the first brand.
Since 2010, this industry-renowned selection campaign has been successfully held for four consecutive years. This year is the fifth session. This year's Golden Globe Awards will use the industry's real name WeChat vote + special judges to vote under the real name to ensure the objectivity and fairness of the voting.
The 2014 High-tech LED Conference and High-tech Golden Globe Awards Ceremony will be held in Shenzhen on December 12-13, 2014. At that time, the top leaders of the LED lighting industry will gather in Shenzhen to enjoy the Oscar red carpet-style courtesy. Witness the annual glory of the LED lighting industry.
2014 Gaogong Golden Globe Awards Selection Process:
The first stage: June 1st - July 31st business registration → generate candidate list second stage: August 8th - September 30th industry WeChat real name vote → generate shortlist list third stage: October 1-11 20th finalist corporate video production / judges real-name voting → winners fourth stage: December 12-13, Shenzhen 2014 High-tech LED Conference and High-tech Golden Globe Awards Ceremony (announced winners)
As LCD display in YFJ company that we usually use it to military grade battery ,especially Lithium-ion batteries ,for these battery applications ,we have obvious advantage is that we focus more on shor circuit protection which we follow the US military standard.
Short circuit protection:The following test shall be performed. Charge batteriesas specified in ; use of 4.6.3 is permitted. Measure and record the OCV. Short each battery across all the positive and negative terminals with a total external resistance not greater than 50 milliohms. After one hour remove the short from across the terminals. Measure and record the OCV. Stabilize batteries at the normal conditions of 4.3.1 for not less than 2 hours. Chargebatteries in accordance with 4.6; use of 4.6.3 is permitted. Stabilize batteries at normal conditions for not less than 2 hours, then discharge the battery in accordance with 4.7.2.3. The battery shall meet the requirements of 3.7.2.3.
Li-Ion Battery With Lcd Display
Charge voltage: 16.8V
Nominal voltage : 14.8V (4S7P)
Initial impedance : 120mΩ
Nominal capacity: 19.6Ah
Minimum capacity: 19.4Ah
Communication methods : SMBUS data communication
Electricity quantity show: LCD Electricity quantity show
Charge current: Standard Charging::0.2C5A (3.9A)
Rapid charge: 0.5C5A C(9.8A) Max
Standard Charging method : 3.9A(0.2C5A) CC(constant current)charge to 16.8V,then CV(constant voltage 16.8V)charge till charge current decline to ≤196mA(≈0.01C5A)
Charging time:Standard Charging: 6.5hours(Ref.)
Rapid charge: 3.5 hours(Ref.)
Max.discharge current: 9.8A(0.5C5A)
Discharge cut-off voltage: 10.0V
Cycle life (0.2C5A/0.2C5A) : 500 items,≧80%DOD; 300 times,≧80%DOD
Operating temperature : Charging: 0℃~45℃
Discharging:-20℃~+60℃
Li-ion Battery With LCD Display
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YFJ TECHNOLOGY (HK) CO.,LIMITED , http://www.yfjpower.com