This reference design is a high efficiency, high power
factor and digital dimming electronic ballast designed to
drive rapid start fluorescent lamp types. The design
contains an active power factor correction circuit for
universal voltage input as well as a ballast control cir-
cuit using the IR2159. The design also includes a
PIC16F628 microcontroller and an isolation circuit for
connecting to a Digitally Addressable Lighting Interface
(DALI). Other features include EMI filtering, transient
protection and lamp FAULT protection. AN809
Digitally Addressable DALI Dimming Ballast
FIGURE 1: DALI DIMMING BALLAST
Authors: Ross Fosler
Microchip Technology Incorporated
Cecilia Contenti
International Rectifier
Tom Ribarich
International Rectifier
INTRODUCTION
This reference design is a high efficiency, high power
factor and digital dimming electronic ballast designed to
drive rapid start fluorescent lamp types. The design
contains an active power factor correction circuit for
universal voltage input as well as a ballast control cir-
cuit using the IR2159. The design also ……
