NXP公司的UBA2025是高壓功率集成電路,包括半橋功率電路(600V,3歐姆),振蕩器以及用于起動,預熱,點火, 燃燈和保護.穩定狀態的半橋電路電流高達280A,點火電流高達1.5A,可調預熱時間和點火時間,可調預熱電流和燈功率,主要用在5W到25W熒光燈(CFL).本文介紹了UBA2025主要特性, 方框圖, 23W CFL應用電路圖和所用元件值,以及230V/120V 23W CFL演示板主要特性和指標,電路圖與材料清單(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應用:
5 W to 25 W CFLs provided that the maximum junction temperature is not exceeded.
圖1.UBA2025方框圖
圖2.UBA2025 23W CFL應用電路圖
23W CFL應用電路元件值:
230V/120V 23W CFL演示板
The demo board includes open lamp, broken filament and broken lamp protection circuits.
圖4.230V/120V 23W CFL演示板外形圖
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
圖5.23W CFL演示板電路圖(230V)
圖6.23W CFL演示板電路圖(120V)
230V CFL演示板主要指標:
•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演示板主要指標:
•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演示板材料清單:
詳情請見:
http://www.nxp.com/documents/data_sheet/UBA2025.pdf
和
http://www.nxp.com/documents/user_manual/UM10426.pdf
