In LED lighting, LED fluorescent lamp trend replacing traditional fluorescent lamps are increasingly uncertain. LED fluorescent lamp at least 30% above than traditional fluorescent lamp power saving, and life is 5~8 times the traditional fluorescent lamp. Currently fluorescent lamp design limited in design of heat sink design, power supply 2. Thermal design by initially of full PC tube, to now half PC half aluminum tube structure gradually evolution, each home of thermal design also their own strength, currently entire industry on thermal of attention and thermal design also more 1 years Qian mature many; because is next-generation of energy-saving products, so from products defined of began on on power made has is high of requirements, main performance in high performance, and long life, and small volume, and low temperature rose, and high reliability,.
FT880 is a software for existing customers for LED fluorescent lamp on the market requirements of the latest development of a new generation of products, have the following characteristics:
1, FT880 500V high voltage technology for process manufacturing, makes circuit with dynamic feedback zero-current power supply, power supply, 2ms fast start, and other characteristics, long-term working circuit more reliable;
2, the circuit can be configured to Buck, Buck-Boost, Boost circuit topology, such as to facilitate different LED the application requirements.
3, FT880 with PWM\PFM operating mode, allows the circuit to patent "wide voltage constant current technology" different working models and can be flexibly configured to meet the needs of different topologies and LED configurations;
4, chip operating frequency is adjustable, and can be configured as fixed shutdown time mode application makes the circuit more flexible;
5, for LED applications increased linear dimming and PWM dimming function, can be moved from the external input signal, you can also use patented LED dimming of FMD;
6, chip with 2-level current detection mechanism, you can synchronize abnormal detection LED short circuit, reliable protection LED;
7, chip 7.5V ultra low voltage, typical 1mA-chip low-power state, effective price and volume of peripheral devices.
8, the device can be configured to Photocoupler feedback, reached mass production of circuit adjustment, at a low cost, output and open circuit protection.
As shown in Figure 1 FT880 typical application scenarios
As Figure 1 by as shown in FT880 typical application programme, this programme used has efficient of low edge Buck topology structure, using has patent of "full voltage constant flow technology" "zero current powered technology", used has passive PFC circuit improve programme power factors, output light coupling implementation open protection while reduced has output voltage resistance pressure, driven LED of power range for 6W~30W, the programme also has is as follows main features:
1, wide input voltage range: 90~277VAC to meet worldwide use
2, specifically for fluorescent lamp aluminium tubes increased shield design, shield design of the aluminum tube is necessary.
3, ultra small size design, suitable for T8, T10 fluorescent lamp PC \ aluminum tube (high 10MM, w 13.6mm)
4, high efficiency, efficiency 90%
5, meet the requirements of energy star power factors greater than 0.9
6, the overall temperature rise is less than 30 ° c
7, all voltage and current accuracy ± 2%, using patented total voltage constant current technology
8, EN55015B EMI requirements are met
9, no-load power consumption of less than 0.3W
10, output over-voltage protection, overload protection, short circuit protection, reverse connection protection
Be resolved
Tags：0 -
There from the end of the problem
