Based on BP3309 LED indoor lighting power supply design technology

Technology developing rapidly in recent years, LED indoor lighting lamps and lanterns, LED indoor lighting lamps and lanterns as voracious demand of consumer electronic products are unstoppable. More and more on the LED industry chain, and the downstream enterprises to join in the indoor LED lamps and lanterns of development, design and production, has formed a huge your community. Exquisite LED lighting lamps and lanterns design, manufacture and technology of China, and LED lighting products excellent performance, price, making it the world, LED lamps and lanterns design, the production base all over the world; China has the largest population in the world, the family, and rapidly improving housing conditions in recent years, making it the world's largest market of lamps and lanterns.

the LED light source must be constant current source to normal, healthy and long life. To the LED lamp bead, therefore, provide stable constant current power supply is the key technology of LED drive power supply. Constant current power driver chip is the core of the LED drive power supply technology. LED lighting is an emerging technology, early without dedicated chip LED lamp bead drive constant current power supply can only borrow in switching power supplies, chargers, adapters, switching power supply chip, plus the backend constant current circuit, can meet the needs of the LED lighting lamps and lanterns of constant current drive power supply requirements. In recent years, the domestic and foreign manufacturers of integrated circuits have focus and a constant current source driving chip dedicated research and development of LED lighting, at home and abroad are almost at the same time a constant current source driving chip dedicated development and production of LED lighting, at the same time to apply high integration, simple circuit of constant current source driving chip dedicated LED lighting to the market.

indoor lighting of LED lamps and lanterns is really huge amounts of products. As countries to the LED lighting lamps and lanterns of technical indicators have consensus, have the request for power factor compensation are, to a clean power grid also society. Therefore, indoor lighting of LED lamps and lanterns will choose application line is concise, with a power factor compensation, the original edge control ( PSR) The constant current source driving chip. Single-stage APFC + CC + PSR chips may be a indoor lighting lamps and lanterns power preferred.

many foreign chip manufacturers, due to the profit, they need artificial factors, such as reasons, their prices could not fall to the Chinese manufacturer of LED lamps and lanterns wants to the price, only local chip companies in China can meet their demands, domestic chip, artificial, logistics company's profits are lower than foreign companies. At present domestic chip design company produces the LED constant current source driver chip in performance can be comparable with the international company, and its price have good competitive, but also has a certain price cut space.

local chip design, quick and comprehensive application technology service will be win the market, service production and a magic weapon. IC design companies to provide the end user can be used in the production of complete sets of solutions is the demand trend of the consumer electronics industry in the new period, is also a shortcut to promote new integrated circuit products quickly. Therefore, to the LED lamps and lanterns manufacturers launched a new generation of chip at the same time provide solution can be used in the production of practical model ( DEMO) It is very important and necessary.

BP3309 technical performance

BP3309 is a single stage power factor correction, a source of high precision LED constant current control chip, the original edge feedback is applicable to 85 vac - 265 vac input voltage range of the flyback type isolation or lifting pressed the isolation of the LED constant current power supply. Typical application of BP3309 is shown in figure 1.

BP3309 integrated active power factor correction circuit, can achieve higher power factor ( P F C > 0。 95). And low total harmonic distortion ( 野