UBA2017

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Product data sheet

Rev. 2 — 15 May 2012

7 of 29

NXP Semiconductors

UBA2017/UBA2017A

600 V fluorescent lamp driver with linear dimming function

7.3 Fluorescent lamp control

The IC incorporates all the regulation and control needed for the fluorescent lamp(s), such

as filament preheat, ignition frequency sweep, lamp voltage limitation, lamp current

control, dimming, end-of-life detection, overcurrent protection and hard switching limiting.

In the UBA2017/UBA2017A, seven different operating states can be distinguished. In

each state the IC acts in a specific way, as described in the next paragraphs. Figure 6

shows the possible transitions between the states with their conditions.

Fig 5.

Oscillator, driver and half-bridge voltages

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