NXP UBA20262

Description

The UBA20262 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:

• 4.7 mH mains filter inductor; ISAT = 300 mA

• 2000/1.3/1.3/ 22 µH lamp inductor

Typical applications

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

More information

• Datasheet
• IC product information