UBA20262
description
The UBA20261/2 are high-voltage power integrated circuits designed to drive and control high powered self-ballasted pact Fluorescent Lamp (CFL) lighting applications operating at mains supply voltages of 120 V or 230 V. The IC includes a half-bridge power circuit consisting of two NMOST power MOSFETs, an advanced feature for step dimming and a lamp current controlled boost feature for boosting cold (amalgam) CFLs.
The controller contains a CFL half-bridge drive function, a high-voltage level-shift circuit with integrated bootstrap diode, an oscillator function, a current control function for preheat and burn, a timer function and protection circuits. The UBA20261/2 are supplied using the d V/dt current charge supply circuit from the half-bridge circuit.
Remark: The mains voltages given in this data sheet are AC voltages.
2. Features and benefits
2.1 Half-bridge features
- UBA20261: two internal 350 V, 1 , maximum 5 A NMOST half-bridge power MOSFETs
- UBA20262: two internal 600 V, 3 , maximum 2.7 A NMOST half-bridge power MOSFETs
- Integrated...
