NXP UBA2211 12W节能灯CFL电源解决方案

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 ha...