UBA2021 datasheet(2/20 Pages) PHILIPS

2 / 20 page

2001 Jan 30

Philips Semiconductors

Product speciﬁcation

630 V driver IC for CFL and TL lamps

UBA2021

FEATURES

• Adjustable preheat and ignition time

• Adjustable preheat current

• Adjustable lamp power

• Lamp temperature stress protection at higher mains

voltages

• Capacitive mode protection

• Protection against a too-low drive voltage for the power

MOSFETs.

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.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

High voltage supply

VFS

high side supply voltage

IFS <15 µA; t < 0.5 s −−

630

Start-up state

VVS(start)

oscillator start voltage

−

11.95

−

VVS(stop)

oscillator stop voltage

−

10.15

−

IVS(standby)

standby current

VVS =11V

−

200

−µA

Preheat mode

fstart

start frequency

−

108

−

kHz

tph

preheat time

CCP = 100 nF

−

666

−

VRS(ctrl)

control voltage at pin RS

−−600

−

Frequency sweep to ignition

bottom frequency

−

42.9

−

kHz

tign

ignition time

−

625

−

Normal operation

bottom frequency

−

42.9

−

kHz

tno

non-overlap time

−

1.4

−µs

Itot

total supply current

fB = 43 kHz

−

RG1(on), RG2(on) high and low side on resistance

−

126

−Ω

RG1(off), RG2(off) high and low side off resistance

−

−Ω

Feed-forward

fff

feed-forward frequency

IRHV = 0.75 mA

−

63.6

−

kHz

IRHV = 1.0 mA

−

84.5

−

kHz

Ii(RHV)

operating range of input current at pin RHV

−

1000

µA

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