UBA2000T datasheet(9/16 Pages) PHILIPS

9 / 16 page

1996 Jan 03

Philips Semiconductors

Product speciﬁcation

Electronic TL-lamp starter

UBA2000T

Output stage

Isource

peak source current

(pulse shape Fig.6)

Vout < 2 V; striking

switching device

1.5

−

Isink

output sink current

Vout = 0.8 V

−−

pulse width

VCC =30V

−−µs

pulse charge

VCC = 30 V; note 3

−−

Vout

output voltage

Isink = 0.5 mA; driving gate

device in preheat mode

−

6.8

−

Timing

tprf

preheat time (ﬁrst)

N = 1; note 4

−

1.52

−

tprn

preheat time (next)

≤ N ≤ 7; note 5

−

0.64

−

tini

initial time

−

125

−

Current protection

Iprot(m)

current protection level (peak value)

2.2

3.4

−

delay time before current protection is

enabled

note 6

−

Sense resistor

Rsense

internal sense resistor

note 7

−

Ω

Preheat current

Ipr(rms)

preheat current (RMS value)

note 8

0.33

−

1.4

Switching off current

Iso

preheat current level at the moment it

is switched off

note 9

285

380

475

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Notes

1. When the switching device is triggered, ICC =Isource.

2. This is the active current when the lamp is lit.

The given value is valid for Vlamp = 115 V. The total

current at Vin equals: Iin =ICC +Ic (leakage currents

are neglected).

3. Qp =Isource × tp.

4. Time is derived from the mains frequency; division

factor equals 76.

5. Time is derived from the mains frequency; division

factor equals 32.

6. The delay time is set by a clock signal, which is derived

from the current through the sense resistor. Due to

inrush transients of the preheat current, variation of td

is possible.

7. This is the resistance of the internal sense circuit

(excluding the bonding wires).

8. To guarantee good functioning, a crest factor of at

least 1.5 is needed at low currents.

9. When the holding current of TH1 is lower than Iso, TH1

is switched off at the holding current (in case of a

trigger device).

Fig.6 Pulse shape (typical value).

handbook, halfpage

MGE008

Isource

(mA)

tw = 7 µs

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