NXP公司的UBA2025是高压功率集成电路,包括半桥功率电路(600V,3欧姆),振荡器以及用于起动,预热,点火, 燃灯和保护.稳定状态的半桥电路电流高达280A,点火电流高达1.5A,可调预热时间和点火时间,可调预热电流和灯功率,主要用在5W到25W荧光灯(CFL).本文介绍了UBA2025主要特性, 方框图, 23W CFL应用电路图和所用元件值,以及230V/120V 23W CFL演示板主要特性和指标,电路图与材料清单(BOM).

The UBA2025 is a high voltage power IC intended to drive and control a Compact

Fluorescent Lamp (CFL). It contains a half bridge power circuit, an oscillator, and a control circuit for starting up, preheating, ignition, lamp burning, and protection.

UBA2025主要特性:

Two internal 600 V, 3ohm max NMOST half bridge powers

For steady state half bridge currents up to 280 mA

For ignition half bridge currents up to 1.5 A

Adjustable preheat and ignition time

Adjustable preheat current

Adjustable lamp power

Lamp temperature stress protection at higher mains voltages

Capacitive mode protection

Protection against too low a drive voltage for the power MOSFETs.

UBA2025应用:

5 W to 25 W CFLs provided that the maximum junction temperature is not exceeded.

图1.UBA2025方框图

图2.UBA2025 23W CFL应用电路图
23W CFL应用电路元件值:


230V/120V 23W CFL演示板

The demo board includes open lamp, broken filament and broken lamp protection circuits.

图4.230V/120V 23W CFL演示板外形图

23W CFL演示板主要特性:

Key demo board features include:

•Two internal 600 V, 3 Ω NMOS half-bridges

•Steady state half-bridge current up to 280 mA

•Ignition half-bridge currents up to 1.5 A

•Adjustable preheat and ignition time

•Adjustable preheat current

•Adjustable lamp power

•Lamp temperature stress protection at higher mains voltage

•Protection against low drive voltage for the power MOSFETs

•Capacitive mode protection


图5.23W CFL演示板电路图(230V)

图6.23W CFL演示板电路图(120V)

230V CFL演示板主要指标:

•Input voltage range: 230 V, ±20 %, 50 Hz

•Input power: 22 W at 230 V

•Input current: 180 mA at 230 V

•Power factor: 0.57

•Preheat frequency: 70 kHz, running frequency 45 kHz

•1.5 s preheat

Burners:

•20 W

•4 pins

•Burner current 180 mA

•Burner voltage 110 V

Resonant inductor:

•EE19, PC40 core, 4 pins, gap 1.2 mm

•2.5 mH +5 %, 240 Ts, wire width 0.19 mm x 2 mm

120V CFL演示板主要指标:

•Input voltage range: 120 V, ±20 %, 60 Hz

•Input power: 23 W at 120 V

•Input current: 180 mA at 120 V

•Power factor: 0.60

•Preheat frequency: 70 kHz, operating frequency 42 kHz

•1.5 s preheat

Burners:

•20 W

•4 pins

•Burner current 180 mA

•Burner voltage 110 V

Resonant inductor:

•EE19, PC40 core, 4 pins, gap 1.2 mm

•2.5 mH +5 %, 240 Ts, wire width 0.19 mm x 2 mm

230V/120V CFL演示板材料清单:

详情请见:
http://www.nxp.com/documents/data_sheet/UBA2025.pdf
和
http://www.nxp.com/documents/user_manual/UM10426.pdf