1. General description
The UBA2021 is a high voltage IC intended to drive and control Compact Fluorescent
Lamps (CFL) or fluorescent TL lamps. It contains a driver circuit for an external
half-bridge, an oscillator and a control circuit for starting up, preheating, ignition, lamp
burning and protection.
2. Features
n Adjustable preheat and ignition time.
n Adjustable preheat current.
n Adjustable lamp power.
n Lamp power independent from mains voltage variations.
n Overpower protection.
n Lamp temperature stress protection at higher mains voltages.
n Capacitive mode protection.
n Protection against a drive voltage that is too low for the power MOSFETs.
3. Quick reference data
UBA2021
630 V driver IC for CFL and TL lamps
Rev. 04 — 25 July 2008 Product data sheet
Table 1. Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
High voltage supply
V
FS
high side supply voltage I
FS
<15µA; t < 0.5 s - - 630 V
Start-up state
V
VS(start)
oscillator start voltage - 11.95 - V
V
VS(stop)
oscillator stop voltage - 10.15 - V
I
VS(standby)
standby current V
VS
= 11 V - 200 - µA
Preheat mode
f
start
start frequency - 108 - kHz
t
ph
preheat time C
CP
= 100 nF - 666 - ms
V
RS(ctrl)
control voltage at pin RS - −600 - mV
Frequency sweep to ignition
f
B
bottom frequency - 42.9 - kHz
t
ign
ignition time - 625 - ms
Normal operation
f
B
bottom frequency - 42.9 - kHz
t
no
non-overlap time - 1.4 - µs
