UBA20270
Description
The UBA20270 is a high-voltage power IC intended to control higher powered self ballasted pact Fluorescent Lamp (CFL) lighting applications. The UBA20270 is a controller circuit with advanced features for dimming and has a lamp current controlled boost feature for boosting cold (amalgam) CFLs.
Key Features
- Integrated high-voltage level-shift function with integrated bootstrap diode 2.2 Preheat and ignition features
- Coil saturation protection during ignition
- Adjustable preheat time
- Adjustable preheat current
- Ignition lamp current detection 2.3 Lamp boost features
- Adjustable boost timing
- Fixed boost current ratio of 1.5
- Gradually boost to burn transition timing 2.4 Dim features
- Continuously variable dimming function for standard phase cut dimmers
- Natural dimming curve by logarithmic correction
