UBA2014_4 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 04 — 16 October 2008 13 of 19
NXP Semiconductors
UBA2014
600 V driver IV for HF fluorescent lamps
[1] The maximum non-overlap time is determined by the level of the CF signal. If this signal exceeds a level of 1.25 V, the non-overlap will
end, resulting in a maximum non-overlap time of 7.5 µs at a bridge frequency of 40 kHz.
Lamp voltage sensor
Input: pin LVS
I
i
input current V
LVS
= 0.81 V - - 1 µA
V
lamp(fail)
lamp fail voltage 0.77 0.81 0.85 V
V
lamp(fail)(hys)
lamp fail hysteresis voltage 119 144 169 mV
V
lamp(max)
maximum lamp voltage 1.44 1.49 1.54 V
Output: pin CT
I
o(sink)
output sink current V
CSW
=2.0V 273033µA
I
o(source)
ignition output source current V
CSW
= 2.0 V 9.0 10 11 µA
Average current sensor
Input: pins CSP and CSN
I
i
input current V
CS
=0V --1µA
V
offset
offset voltage V
CSP
=V
CSN
= 0 V to 2.5 V −2 0 +2 mV
g
m
transconductance f = 1 kHz 1900 3800 5700 µA/mV
Output: pin CSW
I
o
output current source and sink; V
CSW
=2V 8595105µA
Preheat timer; pin CT
t
ph
preheat time C
CT
= 330 nF;
R
IREF
=33kΩ
1.6 1.8 2.0 s
t
ign
ignition time C
CT
= 330 nF;
R
IREF
=33kΩ
- 0.32 - s
I
o
output current V
CT
= 2.5 V 5.5 5.9 6.3 µA
V
OL
LOW-level output voltage - 1.4 - V
V
OH
HIGH-level output voltage - 3.6 - V
V
hys
hysteresis voltage 2.05 2.20 2.35 V
Table 6. Characteristics
…continued
V
DD
=13V; V
FVDD
−
V
SH
= 13 V; T
amb
=25
°
C; all voltages referenced to GND; see test circuit of Figure 8; unless otherwise
specified.
Symbol Parameter Conditions Min Typ Max Unit
