UBA2016A_15_15A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 3 — 16 November 2011 31 of 42
NXP Semiconductors
UBA2016A/15/15A
600 V fluorescent lamp driver
11. Application information
11.1 Connecting the IC in an application
A 33 k resistor must be connected between pin IREF and GND. The tolerance of this
resistor adds to any current related tolerances of the IC, including f
sw(low)
. No other
components can be connected to pin IREF.
Tolerance and temperature dependency of the capacitor connected between pin CF and
GND will add to the tolerance on f
sw(low)
.
Small decoupling capacitors (about 100 pF) are recommended on pins FBPFC and IFB
close to the IC.
Normal sized decoupling capacitors (about 10 nF) are recommended on pins DIM and
EOL.
The capacitors at pins CF, COMPPFC, CPT, FSHB and VDD should also be placed close
to the IC.
A capacitor between pin CIFB and GND of at least 470 pF is needed for stability of the low
switching frequency.
A capacitor between pin VDD and GND of at least 10 nF is needed for stability of the
internal VDD voltage clamp. However, for reliable operation of the IC a low ESR type of at
least 470 nF is recommended.
A capacitor between pin FSHB and SHHB is needed to supply the high-side driver. The
recommended value for this capacitor is
1
⁄
5
of the value of the capacitor at VDD.
A series resistor of at least 1 k is recommended on pins AUXPFC and SLHB.
