The AX2028 is a driver LED constant current control chip, system voltage range from 12 V to450 V, duty ratio from 0 to 100%. Support AC 85 ~ 265 V input, mainly used in non isolatedLED drive system. The constant current control method for AX2028 optimization, makes the LED current in AC 85 ~ 265 V range is less than ± 3%.The system structure of AX2028 optimization, the LED fluorescent lamp scheme in 18W system, communication within the range of 85 ~ 265V system efficiency higher than 90%.In the exchange of 85 ~ 265 V, AX 2028 can drive 3 ~ 36W LED array,widely used in E14 / E27 / PAR30 / PAR38 / GU10 lampand LED lamp.
AX2028 has multiple protection function of LED including LED LED open circuit protection,short circuit protection, over temperature protection. When faults appear in the system, the power system into protection state, until the fault is removed, the system back to the normalmode.
AX2028 PIN to PIN BP2808, pins are compatible, and high conversion efficiency of 2%.
Features of AX2028 ●System voltage range of 450 to V DC input voltage from 12 V, 85 ~ 265V input supportcommunication. ●Duty ratio range from 0 to 100%. ●The output circuit accuracy of ± 5%. ●System efficiency as high as 93%. ●LEDshort circuit protection,LEDopen circuit protection. ●Over temperature protection. ●Multiplex DIM pins LED analog dimming and PWM dimming. ●Constant flow control method with adjustable output.
Typical applications of AX2028
● LED fluorescent lamp
● E14 / PAR30 / PAR38 / GU10 / E27 LED spotlight
● LED projection lamp
● LED signal lamp
● LED landscape lamp
Pin Configurations of AX2028
● LED efficiency and PFC have more than 90% open and short circuit protection, temperature
● power factor 0.944 (comparable with the active PFC);
● efficiency of 90% (down, the voltage up to 92.4%);
● MOS tube test temperature: 51 ℃ (ambient temperature of 24 ℃), the temperature at 30 ℃.
Circuit description lLED drive power price market first, efficiency and PFC are more than 90. Open circuit short circuit temperature protection to T8T1018W fluorescent lamp wall lamp, LED application. The application diagram
Output LED connection: 12 series of 21 parallel
● The L output current: 390mA
● Current accuracy: AC 100V ~ 250V output current change ± 5%
● Efficiency: 93%
● PFC: 0.91
● The switching frequency: 67K
● Through the PWD terminal can achieve PWM dimming
Keywords: compatible with BP2808 AX2028 BP2808 high PFC value and high power factorand high efficiency of AC/DC AC DC fluorescent lamp driving constant current drive powerisolation drive non isolated driving triac dimming 85V~265V E27 PAR30 PAR38 GU10 short-circuit protection circuit protection, over temperature protection PWM