基于UBA2028设计的600V荧光灯电源技术
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主要特性和优势:
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应用:
5 W to 25 W dimmable CFLs, provided that the maximum junction temperature is not
exceeded.
图1.UBA2028方框图
图2.UBA2028 的PGND 和GND连接图