600V and 350V power IC
UBA20261/2
600 V and 350 V power IC for step dimmable CFLs
Rev. 2 — 10 October 2011
Product data sheet
1. General de...
Description
UBA20261/2
600 V and 350 V power IC for step dimmable CFLs
Rev. 2 — 10 October 2011
Product data sheet
1. General description
The UBA20261/2 are high-voltage power integrated circuits designed to drive and control high powered self-ballasted Compact 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 dV/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 high-voltage level-shifter function with integrated bootstrap diode
2.2 Preheat and ignition features
Coil saturation protection during ignition Adjustable saturation protection level Adjustable preheat time Adjustable preheat current Ignition lamp current detection
2.3 Lamp boost features
Adjus...
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