The UBA2014 integrated half bridge driver IC has been designed for driving electronically ballasted fluorescent lamps.The IC provides the drive function for 2 discrete power mosfets. Besides the drive function the IC also includes thelevel-shift circuit, the oscillator , a lamp voltage monitor, a current control function a timer function and protections.This application note will give a des cription of a typical integrated 36W TLD application. The voltage fed half bridge issupplied by a constant 400Vdc supply (either an external or a PFC supply). According IEC61000-3-2 (Limits forharmonic current emission), power factor correction for loads over 25W is required, see figure 1.
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