The UBA2028 is a high voltage power IC that drives and controls electronically ballasted

Compact Fluorescent Lamps (CFLs). The IC includes a Metal-Oxide-Semiconductor

Transistor (MOST) half-bridge power circuit, a dimming function, a high voltage level shift

circuit, an oscillator function, a lamp voltage monitor, a current control function, a timer

function and various protections.

UBA2028主要特性和優(yōu)勢(shì):

?? Two internal 600 V, 3 Ω max MOST half-bridge power circuits

?? For steady state currents up to 280 mA

?? For ignition currents up to 1.5 A

?? Adjustable preheat time

?? Adjustable preheat current

?? Current controlled operating

?? Single ignition attempt

?? Adaptive non-overlap time control

?? Integrated high voltage level shift function

?? Power-down function

?? Protection against lamp failures or lamp removal

?? Capacitive mode protection

UBA2028應(yīng)用:

?? 5 W to 25 W dimmable CFLs, provided that the maximum junction temperature is not

exceeded.

圖1.UBA2028方框圖

圖2.UBA2028 的PGND 和GND連接圖

圖3.UBA2028 120V的應(yīng)用電路圖

圖4.UBA2028 230V的應(yīng)用電路圖