1. General description
The UBA2024 is a family of high-voltage monolithic Integrated Compact Fluorescent
Lamp (CFL) drivers for a large range of lamp powers. Specific versions are optimized for
230 V and 110 V mains supplies. The product family integrates full CFL controller
functionality with high voltage half-bridge transistors. All products in the UBA2024 family
are pin-to-pin compatible enabling a single application design covering a wide range of
power ratings.
The IC features a soft start function, an adjustable internal oscillator and an internal drive
function with a high-voltage level shifter for driving the half-bridge.
To guarantee an accurate 50 % duty cycle, the oscillator signal is passed through a divider
before being fed to the output drivers.
2. Features and benefits
The common feature set includes:
high power efficiency
a high integration level with low component counts enabling small form factor
electronic ballast
integrated bootstrap diode
soft start function
minimum glow time control
integrated low-voltage supply
adjustable operating frequency as a result of the embedded oscillator
an accurate 50 % duty cycle provided by an embedded oscillator signal
integrated half-bridge power transistors
an internal drive function with a high-voltage level shifter up to 550 V (300 V for the
UBA2024BP and UBA2024BT)
3. Applications
Driver for any kind of half-bridge configured load up to 23 W, provided that the
maximum junction temperature is not exceeded
Designed for electronically self-ballasted CFL lamps
UBA2024
Half-bridge power IC for CFL lamps
Rev. 6.2 — 1 November 2010 Product data sheet
