NXP UBA2028 600V荧光灯调光方案
NXP公司的UBA2028是600V高压荧光灯(CFL)调光电路,包括有半桥输出的MOST,调光功能高压电平转移电路,振荡功能,灯电压监视器,电流控制功能和计时功能与保护功能. UBA2028具有两个600V 3欧姆MOST半桥功率电路,稳态电流高达280mA,起弧电流高达1.5A,可调整预热时间和预热电流,并采用电流控制, 主要用于5 W 到25 W 可调光的CFL.本文介绍了UBA2028的主要特性,方框图, PGND和GND的连接图, 120V和240V的应用电路图以及采用UBA2028 的CFL 18W 230V调光参考板主要特性,电路图和材料清单(BOM).
UBA2028: 600 V dimmable power IC for compact fluorescent lamps
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 protections.
UBA2028主要特性:
• Two internal 600 V, 3ohm max MOST half bridge powers.
• 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.
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