UBA2016AP datasheet(31/42 Pages) PHILIPS

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UBA2016A_15_15A

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Objective data sheet

Rev. 1 — 20 May 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

Ω resistor must be connected between pin IREF and GND. The tolerance of this

resistor adds to any current related tolerances of the IC, including fsw(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 fsw(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

Ω is recommended on pins AUXPFC and SLHB.

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