In recent years, LED indoor lighting technology has developed rapidly, and LED indoor lighting has unstoppable consumer electronics in massive demand. More and more LED industry chains, medium and downstream companies have developed, designed and produced in interior LED lamps, has formed a huge enterprise group. China's superb LED lighting design, manufacturing technology, and excellent performance, price ratio of LED lamp products, make it a global, LED lamp design, production base in the world; China has the world's largest population, family, and recent years Rapid improvement housing conditions make it a world's largest lamp market.
The LED light source must work with a constant supply source to work properly and healthy. Therefore, providing a stable constant current power source to the LED lamp bead is the key to the LED drive power supply. The drive chip of the constant current power supply is the core technology of the LED drive power. LED lighting is an emerging technology. In the early days, due to the unified LED lamp beads drive constant current power chip, only the switching power supply, charger, adapter switch regulator power supply chip, plus the back end constant current circuit can be It is reluctantly to meet the needs of LED lighting fixtures that require constant current drive power supply. In recent years, the integrated circuit manufacturers at home and abroad have focused on the development of LED lighting-specific constant current source driving chips, almost simultaneously developed production of LED lighting for LED lighting, and high integration, simple LEDs. Lighting special constant current source driver chip is pushed to the market.
Indoor lighting LED luminaire will be a real massive product. Because countries have consensus on the technical indicators of LED lighting fixtures, the compensation of power factors requires a clean grid. Therefore, the indoor lighting LED lamps will be used for the application line, and the power factor compensation, the primary-side control (PSR) constant current source drive chip. Single-stage APFC + CC + PSR chips may be preferred for indoor lighting.
A lot of foreign chip manufacturers, but they are considering the profits of their profits, artificial, logistics and other factors. Their price cannot fall into the price you want in China's LED lamp manufacturers, only my country's local chip companies meet their requirements. The profits, manual and logistics of local chip companies are lower than foreign companies. At present, the LED constant current source drive chip produced by local chip design companies can also be comparable to international companies, and its price has a good competitiveness, and also has a certain price cut.
The fast and comprehensive application technical service of the local chip design company will be another magic of the market and service production. Integrated Circuit Design Company provides end users to provide a complete set of applications that can be used in production is the demand trend of consumer electronics industry in the new era, and it is also a shortcut to quickly promote new integrated circuit products. Therefore, it is important to provide a new generation of chips to the LED lamp manufacturer to provide practical samples (DEMO) that can be used for production programs.
BP3309 technical performance
Be
BP3309 is a single stage, a high-precision primary side feedback LED constant current control chip with source power factor correction, is suitable for fly-free isolation or lifting-type non-isolated LED constant current input for 85VAC-265VAC full voltage range. power supply. A typical application of BP3309 is shown in Figure 1.
The BP3309 integrates active power factor correction circuit, which can achieve higher power factor (PFC "0. 95) and lower total harmonic distortion (THD" 20%), efficiency can be greater than 85%; mass production constant current Accuracy can be less than +/- 3%. Since the operation in the inductor current critical continuous mode, the power MOS tube is in a zero current, the switching loss is reduced, and the utilization rate of the transformer is also high. The BP3309 uses a proprietary current sampling mechanism to operate on the original feedback mode, which does not require a secondary feedback circuit, which enables high-precision output constant current control, which greatly saves system cost and volume, and improves the system reliability. The chip uses a patented source drive technology and an internal fast charging circuit that achieves lower primary drive loss, and the ultra-fast system is electrically powered. The LED startup time is less than 300ms, and the startup time is only 116ms when the AC85V is only 116ms (Fig. 2). The BP3309 uses a patented line voltage and load compensation technique, which can achieve excellent line voltage adjustment rate and load adjustment rate, AC full voltage input, and linear load adjustment rates of less than 3%. The line voltage compensation coefficient can also be flexibly adjusted by external components. BP3309 built-in multi-protection function to enhance system reliability, including LED open protection, LED short circuit protection, chip power overvoltage, and undervoltage protection, current sampling resistor bootless and short circuit protection, and cycle-by-week limit flow, etc. All protection has automatic restart. , Reading the full text, the technology area
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