NXP UBA2021 13W CFL荧光灯镇流器方案

NXP公司的UBA2021是高压集成电路,能控制和驱动CFL荧光灯,包括有用来驱动外接半桥电路的驱动电路,振荡器和用来起动,预热, 辉弧和保护等功能.而采用UBA2021的13W CFL电子镇流器采用半桥式逆变器作为灯驱动电路,逆变器的正常输入电压为230 V (RMS) ± 15 %, 50 Hz / 60 Hz.本文介绍了UBA2021的主要特性,方框图和典型应用电路以及采用UBA2021的13W CFL电子镇流器的设计要点,方框图, 镇流器电路图和电子镇流器保护电路以及所用元件清单与火线电压100 V (AC)/120 V (AC)时的倍压电路.

CFL 13 W demo PCB with UBA2021 for integrated lamp-ballast designs
The UBA2021 is a high voltage IC intended to drive and control Compact Fluorescent
Lamps (CFL) or fluorescent TL lamps. It contains a driver circuit for an external
half-bridge, an oscillator and a control circuit for starting up, preheating, ignition, lamp
burning and protection.

UBA2021主要特性:

Adjustable preheat and ignition time.
Adjustable preheat current.
Adjustable lamp power.
Lamp power independent from mains voltage variations.
Overpower protection.
Lamp temperature stress protection at higher mains voltages.
Capacitive mode protection.
Protection against a drive voltage that is too low for the power MOSFETs.



图1.UBA2021方框图



图2.UBA2021应用框图

13W CFL电子镇流器

A small and low cost electronic CFL ballast has been designed, which is able to drive a..

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