Analysis of six LED chip manufacturers and mainstream LED chip products

Since 2009, China's LED chip industry has developed very rapidly, and the industry's output value has increased from 2 billion yuan to more than 10 billion yuan. In 2015, the output of LED chips in China increased by 60%. However, due to the weak demand in the European and American markets and the intensified competition in the industry, the output growth was fast but the price drop was also large. It is expected that the demand for LED chip industry will continue to increase this year, the price decline trend will be slightly slowed down, and the chip industry will accelerate integration. The following are the top six LED chip manufacturers in China.

First, Sanan Optoelectronics - domestic overlord

Speaking of China's LED chips, you have to mention Fujian Sanan Optoelectronics. In recent years, Sanan Optoelectronics' revenue has climbed to the top. In 2015, Sanan Optoelectronics LED business achieved operating income of 4.858 billion yuan, a year-on-year increase of 6.08%. Among them, Xiamen Sanan LED revenue was 4.502 billion yuan, with a gross profit margin of 42.44%, an increase of 1.38 percentage points year-on-year. In the first quarter of 2016, the company achieved operating income of 1.178 billion yuan, a year-on-year increase of 27.15%. During the reporting period, the capacity of Xiamen Sanan Optoelectronics Co., Ltd. was gradually released, and 28 MOCVD equipments were put into operation. The 12 units invested in March will be reflected in the second quarter, and the remaining equipment will be put into operation as soon as possible. Obviously, Sanan Optoelectronics' operating income exceeds any scale, and the economies of scale are becoming more and more obvious.

Sanan Optoelectronics chip occupies half of China's small and medium power package light source, and has reached the international leading level in terms of brightness and stability, and the price advantage is obvious. Sanan Optoelectronics is accelerating the overseas market layout. For example, through cooperation with Seoul Semiconductor to lay out LED chip overseas OEM business, it signed a large-scale procurement cooperation agreement with Anxin Energy. Sanan has established a financial leasing company to expand its channel through the establishment of Xiamen Sanan Industrial Co., Ltd. and Xiamen Xinda. Sanan will also raise funds for communication microelectronic devices to produce gallium arsenide high-speed semiconductor devices and gallium nitride high-power semiconductor devices to fill the gap in China's manufacturing process. In general, Sanan Optoelectronics is currently sitting in the chair of the chip.

Sanan Optoelectronics financial report part of the core data

Second, Tongfang shares - constantly increasing the code

Tongfang entered the LED industry in 2004, acquired the LED chip back-end process technology through the acquisition of Singapore TInggi, and built its own LED chip production line in Beijing. In 2010, Tongfang increased its investment in LED epitaxial chip manufacturing, set up 6 MOCVD in Beijing, and invested 3 billion yuan in Nantong to build LED industry base and order 48 MOCVD. At present, there are 59 MOCVDs in Tongfang, ranking 5th in China. Tongfang acquired Zhen Mingli, greatly improved the LED industry chain and enhanced its competitiveness in the LED field. Although LED's business income in Tongfang's shares is less than 10%, relying on the scientific research strength of Tsinghua University, combined with the research and development team of the Chinese Academy of Sciences and Taiwan, it has successfully mastered the key technologies of the chip and applied for nearly 100 domestic and foreign patents. In 2015, in the field of chips and epitaxial wafers, during the reporting period, the company continued to upgrade and upgrade the original 2-inch epitaxial wafer growth technology to 4-inch growth technology, which made the epitaxial wafer product uniformity have a new uniformity. Breakthrough, while increasing the epitaxial brightness by adjusting the thickness of different sediments in the epitaxial structure and increasing the reflective coating. At present, Tongfang has mastered the LED core technology of high-brightness blue-green LED epitaxial wafer growth, high-brightness blue-green LED chip preparation engineering high-power chip, and epitaxial wafer industrial production. In general, the gap between the LED chips produced by Tongfang Optoelectronics and Sanan, Jingyuan and Cree has further narrowed, and the small-size chips have gained high recognition and the market share is increasing.

Core data of the financial statements of Tongfang Shares from 2011 to 2015

Third, Dehao Runda - open downstream

In 2015, Dehao Runda raised funds to develop “LED Flip Chip Project” and “LED Chip-Level Packaging Project” to upgrade and optimize the industrial chain and enhance its core competitiveness. Dehao Runda has been simplifying, simplifying packaging, gold-free FC packaging, removing gold wires, simplifying the packaging process, removing gold balls and fluxes, developing fluxless gold-tin eutectic flip chip bonding technology, and improving heat dissipation. quality.

Core data of DHL Runda Financial Statements from 2011 to 2015

Fourth, Huacan Optoelectronics - synergistic development

Under the unfavorable situation that the price of LED chips continues to fall, Huacan adapts through technology research and development, cost control and other means. In 2015, Huacan's major R&D project achieved remarkable progress, and it was the first to introduce small-pitch professional display chips, high-brightness red-light chips, etc., and at the same time do a good job in intellectual property protection. In 2016, Huacan further expanded its production scale and increased its cost advantage by building an internationally renowned LED industry base. In terms of production capacity, Huacan Optoelectronics is the second largest in China and the fourth largest LED chip manufacturer in the world. Huacan is competing for its leading position by focusing on creating core and actively expanding its model.

Recently, Huacan Optoelectronics announced the asset restructuring plan. The company's initial reorganization target asset is Harmony Corelight (Yiwu) Optoelectronics Technology Co., Ltd., which purchased 100% of the shares of American New Semiconductor Co., Ltd. Through this acquisition, Huacan Optoelectronics can cut into the MEMS sensor business from the previous LED chip business, realize the industrial synergy between the two, and create a grand vision of the semiconductor industry leader.

Part of the core data of Huacan Optoelectronics Financial Statement from 2011 to 2015

V. Aoyang Shunchang - Striving for stability

Compared with peers' crazy expansion, Aoyang Shunchang is relatively calm. With its low led project investment, advanced and mature technology, leading core equipment and excellent management concept, it has created excellent cost control and profitability. Continue to do a good job in manufacturing management for the company's existing LED business, and maintain high utilization of epitaxial wafers and chip capacity. At the same time, targeted research and development investment will be made to improve the technical performance of the company's chip products such as yield, brightness and luminous efficacy. Do a good job of interacting with upstream and downstream companies, strengthen the management of suppliers and customers, and enhance the company's overall competitive advantage and profitability.

Sixth, crystal energy photoelectric - the third pole LED chip, breaking the monopoly of the United States and Japan

There are three LED technology routes in the field of semiconductor lighting, which are the sapphire substrate LED technology route represented by Japan Nichia Chemical, the silicon carbide substrate LED technology route represented by American cree, and the representative of China Jingneng Optoelectronics. Silicon substrate LED technology route. The award of the silicon substrate technology project indicates that the silicon substrate has been proven by the state and has been upgraded to the national strategic level. Silicon substrates will be ushered in commercial applications of scale. Jingneng Optoelectronics mainly produces LED chip products that can be widely used in general lighting, display screens, LCD backlights and industrial fields. In particular, GaN epitaxial growth and chip processing technology on silicon substrates are unique in the world. The company not only has all intellectual property rights, but also globally. The first company to mass produce high-power, high-performance silicon substrate LED chips. Different from other LED chip companies, the company is actively engaged in the research and development of LED epitaxial chips on silicon substrates. Crystal Energy Optoelectronics surrounds silicon substrate technology. From the core technology fields of epitaxy, chip to package, international and domestic patent layout has been carried out for many years. According to statistics, Jingneng Optoelectronics has obtained 299 related patents and 161 patent families worldwide. Jingneng Optoelectronics is in an absolute leading position in the field of silicon substrates. For many years, the company has been insisting on research and development and breakthroughs around this silicon substrate LED technology route, and successfully achieved mass production. From this, we can clearly see the strategic route of Jingneng Optoelectronics: compete for the third pole of the Chinese LED chip market.

Analysis of several common classic LED driver chips

For IC design companies to understand what kind of ICs the market needs, what price should be suitable. Prices can only be changed at any time. Quality and price are the factors that determine whether or not to use, and it is important to meet the product design quality parameters! The price is more important!

Now more and more IC design manufacturers have joined the LED design team, designed a number of models, here from the performance price ratio in detail, how to choose their own suitable IC, which IC is the most suitable for their own products.

1, the market is mixed LED driver IC-AMC7150

At that time, the AMC7150 was still good. I thought about it or not. It has a very important factor, that is, the price, and the market price of less than 2 yuan is the reason why you use it. The AMC7150 currently has dozens of IC models that can be directly replaced, and the price war will be unavoidable.

It can be selected in low-voltage 4-25V products with low design parameters, and the basic drive capability is designed below 3W. For example, 1W string 3 or 3W 1 LED design is stable.

2, Hangzhou Silan Microelectronics - SB42511

At present, Silan Semiconductor has introduced a new IC, which is mainly aimed at driving a battery with 24V to drive 6 LEDs. The price is higher than the AMC7153 discount in the European and American market IC, suitable for designing 1-6 LEDs, input 6-25V input voltage, SOP8 package form, mainly for the current low-end spotlight market.

3, the United States CATALYST company - CAT4201

This IC drives 1-7 1W LEDs. Efficiency up to 92%, 6-28V voltage input range buck drive application design. Compared with the previous two ICs, the biggest advantage is the size of the package SOT23, the line profile, in line with the current design requirements of most small-sized lamp cups.

Large resistance range current adjustment, can adjust the brightness of the potentiometer wide resistance range, such as the design of table lamps and other products need this.

4, Europe Zetex company - ZXLD1350

This IC is currently responding well in the market. It is also a SOT23 small-volume package. It has a 7-7V voltage step-down constant current drive 1-7psc LED, and the circuit is simple and practical. When designing, Rs should be close to the IC to avoid the power supply voltage being largely unmoved, which will affect the constant current effect.

The overall electronic material cost is slightly higher than the previous IC.

5, National Semiconductor LM3402

LM3402 market reflects good, the input voltage range covers the entire automotive application, built-in MOS tube can be up to 15 LEDs, 1-3 LEDs are a bit expensive, more than 5 when the price is very good. The customer engineers who are currently in contact with the evaluation are very high, and the acceptance field is relatively simple and practical. It is the middle of many LED driver ICs in the country.

6, National Semiconductor LM3404

The LM3404 and LM3402 have the same line, the difference is that the current can reach 1A, and the 1-15pcs LED is cost-effective.

The IC specifications listed above are built-in MOS tubes. The built-in MOS tube simplifies the circuit design, reduces the size, reduces the overall design cost, and reduces the failure rate. An LED driver IC that is larger than 1A or more due to its current IC process fabrication, cost, etc. requires an external MOS transistor. In our daily product design, we often encounter high current design, such as 5W, 10W and other higher power design requirements, which can only choose the external MOS tube IC. Next, we will recommend several ICs for comprehensive cost, which is convenient for the selection of engineers.

7, the United States US letter integrated products company MAX16819/MAX16820

The MAX16819/MAX16820 operate from a 4.5V to 28V input voltage range and have a 5V/10mA on-chip voltage regulator. The output current is regulated by a high-side current sense resistor, and a dedicated PWM input (DIM) enables a wide range of pulsed brightness adjustments.

The MAX16819/MAX16820 are ideal for applications that require a wide input voltage range. High-side current sensing and built-in current setting circuitry minimize external component count and provide ±5% accuracy of LED current. The hysteresis control algorithm guarantees excellent input supply rejection and fast response during load switching and PWM dimming. The MAX16819 has an inductor ripple current of 30%, while the MAX16820 has a ripple current of 10%. These devices operate at switching frequencies up to 2MHz, allowing the use of small components.

The MAX16819/MAX16820 operate over the -40°C to +125°C automotive temperature range and are available in a 3mm x 3mm x 0.8mm, 6-pin TDFN package.

Personal recommendation 200-500Hz PWM gray frequency adjustment, 1-6pcs LED serial connection maximum 25W product design, recommended about price of about 0. 5 dollars.

8, National Semiconductor LM3401

The LM3401 is an external MOS high-power LED driver introduced by the National Semiconductor. It can design a driving current of less than 3A. The input voltage is up to 35V, and more than 10 LEDs can be connected in series.

9, the United States US letter integrated products company MAX16802

The MAX16802A/B is a high-brightness (HB) LED driver control IC that contains all the circuitry needed to design a wide input range LED driver for general-purpose lighting and display applications. Suitable for low input voltage (10. 8V DC to 24V DC) LED drivers. When you need to fine-tune the LED current, you can use an on-chip error amplifier and a 1% accuracy reference. A wide range of brightness adjustments can be achieved with low frequency PWM brightness adjustment.

The MAX16802 features an input undervoltage lockout (UVLO) feature that sets the input startup voltage and ensures proper operation when the power supply is dropped. The MAX16802 has an internal bootstrap undervoltage lockout circuit with a high hysteresis voltage.

This simplifies the design of off-line LED drivers. The MAX16802 does not have this bootstrap circuit internally and can be biased directly from +12V. The internally trimmed 262kHz fixed switching frequency allows for the optimal selection of magnetic and filter components for a compact, cost-effective LED driver.

The MAX16802A has a maximum duty cycle of 50% and the MAX16802B has a maximum duty cycle of 75%. These devices are available in an 8-pin μMAX? package and are fully specified over the -40°C to +85°C temperature range.

Personally recommend 200-500Hz PWM gray frequency adjustment, 1-6pcs LED serial connection maximum 50W product design, about 1. 4 US dollars.

10, the United States US letter integrated products company MAX16818

The MAX16818 Pulse Width Modulation (PWM) LED driver controller is available in a compact package that provides large output current with minimal external components. The MAX16818 is ideal for both synchronous and non-synchronous buck topologies, as well as boost, buck-boost, SEPIC, and buck LED driver architectures. Fast LED transient currents up to 20A/μs and brightness adjustment frequencies of 30kHz can be achieved.

The device uses average current mode control to optimize the use of MOSFETs with optimum charge and on-resistance characteristics, minimizing the need for external heat sinks even at output LED currents up to 30A. True differential detection technology precisely controls the LED current. A wide range of brightness adjustments can be easily achieved with an external PWM signal. An internal voltage regulator with a simple external biasing device allows the device to operate over a wide 4.75V to 5.5V or 7V to 28V input voltage range. The wide switching frequency range, up to 1.5MHz, allows the use of small inductors and capacitors.

The MAX16818 has a 180° phase-delayed clock output that can be used to control another out-of-phase LED driver to reduce input and output filter capacitor size and ripple current. The MAX16818 also offers programmable hiccup overcurrent, overvoltage, and thermal protection. The MAX16818ETE+ is rated for operation over the extended temperature range (-40°C to +85°C), while the MAX16818ATE+ operates over the automotive temperature range (-40°C to +125°C). The LED driver controller is available in a lead-free, 0.8mm thick, 5mm x 5mm 28-pin TQFN package with exposed pad.

High-current LED driver controller IC with output current up to 30A. It is recommended to design 50-300W ultra-high power portable LED projector, LCD TV and display backlight, front panel projector/rear projection TV, car, bus/truck external light, car emergency Lighting and symbol lights, and more.

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