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

图3.UBA2028 120V的应用电路图

图4.UBA2028 230V的应用电路图