Datasheet

UBA2028 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet Rev. 02 — 19 July 2010 15 of 23
NXP Semiconductors
UBA2028
600 V dimmable power IC for compact 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.
Output: pin CSW
I
sink(o)
output sink current V
i(CSW)
=2.0V 27 30 33 μA
I
source(o)
output source current V
i(CSW)
= 2.0 V 9.0 10 11 μA
Average current sensor
Input: pins CSP and CSN
I
I
input current V
CS
=0V - - 1 μA
V
offset
offset voltage V
i(CSP)
=V
i(CSN)
=
0Vto2.5V
−20 +2mV
g
m
transconductance f = 1 kHz 1900 3800 5700 μA/mV
Output: pin CSW
I
o
output current source and sink;
V
i(CSW)
=2V
85 95 105 μA
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
o(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 for output 2.05 2.20 2.35 V
Table 6. Characteristics …continued
V
DD
=13V; V
FS
− V
SH
=13V; T
amb
=25 ° C; all voltages referenced to GND unless otherwise specified
(see application circuits of Figure 8 and Figure 9).
Symbol Parameter Conditions Min Typ Max Unit