NXP 公司的UBA2211 是用于节能灯CFL的半桥配置的电源集成电路，火线电压220VAC，最大起辉电流有0.9A,1.35A 和1.85A三个型号。具有预热状态和饱和电流保护，RMS电流控制和超温保护以及容性模式保护。主要用在功率高达25W室内外荧光灯（CFL）。本文介绍了UBA2211主要特性和优势以及专利技术，方框图，应用电路图和230V 12W CFL UBA2211演示板主要指标，电路图和材料清单（BOM）。
UBA2211：Half-bridge power IC family for CFL lamps
The UBA2211 family of integrated circuits are a range of high voltage monolithic ICs for driving Compact Fluorescent Lamps (CFL) in half-bridge configurations. The family is specifically designed to provide easy integration of lamp loads across a range of burner power and mains voltages.
Patented technologies and integrated protection types:
• Preheat state:
– Preheat applications: Adjustable current controlled preheat mode technology enables the preheat time (tph) and preheat current to be set. This mode is triggered during start up.
– Non-preheat applications: Glow-time control minimizes electrode damage just after ignition of the lamp.
• Saturation Current Protection (SCP): This protection is active during ignition ensuring the lamp inductor can operate at the saturation current limit without exceeding the current ratings of the integrated half-bridge power transistors.
• RMS current control: The IC internally calculates the RMS current and changes the frequency (fosc) to ensure the RMS current remains constant. RMS current control is active in the burn state ensuring a constant half-bridge burner current and IC dissipation. The nominal half-bridge burner current is set using the sense resistor (RSENSE).
• OverTemperature Protection (OTP) and Capacitive Mode Protection (CMP): Overtemperature and capacitive mode protection monitor the application ensuring, in non-standard conditions, correct system shutdown and a safe condition at the burner’s end-of-life.

UBA2211主要特性和优势：
1．系统集成
Integrated half-bridge power transistors
UBA2211A: 220 V mains; 13.5 Ω; 0.9 A maximum ignition current
UBA2211B: 220 V mains; 9 Ω; 1.35 A maximum ignition current
UBA2211C: 220 V mains; 6.6 Ω; 1.85 A maximum ignition current
Integrated bootstrap diode
Integrated high voltage supply
2．点火器使用寿命
Current controlled preheat with adjustable preheat time and preheat current
Minimum glow time control to support cold start
Lamp power independent from mains voltage variations
Lamp inductor saturation protection during ignition
3．安全性
Overtemperature protection
Capacitive mode protection
Overpower control
System shutdown at burner end of life
4．容易使用
Adjustable operating frequency for easy fit with various burners
Each device in the family incorporates the same controller functionality ensuring easy power scaling and roll-out across a complete range of CFLs

UBA2211应用：
Compact Fluorescent Lamps up to 25 W for indoor and outdoor applications

图1。UBA2211方框图

图2。UBA2211应用电路图
230V 12W CFL UBA2211演示板
The UBA2211B demo board is set up to drive a 12 W burner.

230V 12W CFL UBA2211演示板主要指标：
• 230 V (AC)
Input voltage range: 220 V to 240 V; 50 Hz
Input power: 12 W at 230 V (AC)
– Input current: 80 mA at 230 V (AC)
– Power factor:> 0.58
– Operating frequency: 42 kHz
– 800 ms preheat
• Burners
– Baishi 3U 12 W burner
Other burners with 70 V lamp voltage and 150 mA current

图3。230V 12W CFL UBA2211演示板电路图

图4。230V 12W CFL和演示板外形图
230V 12W CFL UBA2211演示板材料清单（BOM）：