NXP UBA20260

Description

The UBA20260 is a high-voltage integrated circuit designed to control high power self-ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20260 is a controller circuit with advanced features for step dimming and a lamp current controlled boost feature for boosting cold (amalgam) CFLs.The controller contains a half-bridge drive function for CFLs, 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 UBA20260 is 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

Features

• 2.1 Half-bridge 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
•  4-level step dimming adjustment using a standard on/off mains switch
•  Adjustable memory retention time for step dimming
•  Adjustable minimum dimming level
• 2.5 Protection
•  OverTemperature Protection (OTP)
•  Capacitive Mode Protection (CMP)
•  OverPower Protection (OPP)
•  OverCurrent Protection (OCP) in both boost and burn states
•  Power-down function
• 2.6 Other features
•  Current controlled operation in both boost and burn state
•  External power-down function

Note:L1 4.7 mH mains filter inductor; ISAT = 300 mAL2 Würth Elektronik: 7608000902 2000/21.31.3/22 H lamp inductor

Typical applications

• Step-dimmable compact fluorescent lamps above 20 W and for universal mains

More information

• Datasheet
• IC product information