AN4213 Datasheet, PDF (1/42 Pages) STMicroelectronics – Fluorescent lamps are increasingly driven by electronic

AN4213
Application note
High-frequency ballast 2x58 W (T8 fluorescent tubes)
based on a PowerFLAT™ 5x6 package
By Santina Leo
Introduction
Fluorescent lamps are increasingly driven by electronic rather than electromagnetic ballasts
mainly because fluorescent lamps can produce around 20% more light for the same input
power when driven above 20 kHz instead of 50/60 Hz. Operation at high frequency also
eliminates both light flickering and audible noise.
This application note describes the design calculations and test results of the STEVAL-
ILB010V1demonstration board able to drive 2x58 W linear T8 fluorescent tubes. The
electronic ballast consists of two sections: a power factor correction pre-regulator (PFC),
using the L6562A, and the lamp ballast stage with the L6569. The main purpose of this
application note is to evaluate the electrical features of the new PowerFLAT™ 5x6 package
and to compare its thermal results with that of the DPAK package. The PowerFLAT™5x6
package is used in the STEVAL-ILB010V1 demonstration board shown below.
Figure 1. STEVAL-ILB010V1
AM17315v1
May 2014
DocID023984 Rev 2
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