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主要特性和優勢:
?? 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的應用電路圖
圖4.UBA2028 230V的應用電路圖
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