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NXP 公司的UBA2211 是用于節(jié)能燈CFL的半橋配置的電源集成電路，火線電壓220VAC，最大起輝電流有0.9A,1.35A 和1.85A三個型號。具有預(yù)熱狀態(tài)和飽和電流保護(hù)，RMS電流控制和超溫保護(hù)以及容性模式保護(hù)。主要用在功率高達(dá)25W室內(nèi)外熒光燈（CFL）。本文介紹了UBA2211主要特性和優(yōu)勢以及專利技術(shù)，方框圖，應(yīng)用電路圖和230V 12W CFL UBA2211演示板主要指標(biāo)，電路圖和材料清單（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主要特性和優(yōu)勢：
1．系統(tǒng)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．點(diǎn)火器使用壽命
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應(yīng)用：
Compact Fluorescent Lamps up to 25 W for indoor and outdoor applications

圖1。UBA2211方框圖

圖2。UBA2211應(yīng)用電路圖
230V 12W CFL UBA2211演示板
The UBA2211B demo board is set up to drive a 12 W burner.

230V 12W CFL UBA2211演示板主要指標(biāo)：
• 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

圖3。230V 12W CFL UBA2211演示板電路圖

圖4。230V 12W CFL和演示板外形圖
230V 12W CFL UBA2211演示板材料清單（BOM）：