ICB2FL02G Datasheet, PDF (4/55 Pages) Infineon Technologies AG – Smart Ballast Control IC for Fluorescent Lamp Ballasts

2^nd Generation FL-Controller for FL-Ballasts
Table of Contents
1 Pin Configuration and Description............................................................................................... 6
1.1 Pin Configuration....................................................................................................................... 6
1.2 Pin Description .......................................................................................................................... 6
2 Functional Description ................................................................................................................ 11
2.1 Typical Application Circutry..................................................................................................... 11
2.2 Normal Start Up ...................................................................................................................... 12
2.2.1 Operating Levels from UVLO to Soft Start............................................................................ 13
2.2.2 Operating Levels from Soft Start to Run Mode ..................................................................... 15
2.3 Filament Detection during Start Up and Run Mode ................................................................ 17
2.3.1 Start Up with broken Low Side Filament............................................................................... 17
2.3.2 Low Side Filament Detection during Run Mode.................................................................... 18
2.3.3 Start Up with broken High Side Filament .............................................................................. 19
2.4 PFC Pre Converter.................................................................................................................. 20
2.4.1 Discontinuous Conduction and Critical Conduction Mode Operation ................................... 20
2.4.2 PFC Bus Voltage Sensing..................................................................................................... 21
2.4.2.1 Bus Over Voltage and PFC Open Loop ................................................................... 21
2.4.2.2 Bus Voltage 95% and 75% Sensing......................................................................... 21
2.4.3 PFC Structure of Mixed Signal.............................................................................................. 22
2.4.4 THD Correction via ZCD Signal ............................................................................................ 23
2.4.5 Optional THD Correction dedicated for DCM Operation....................................................... 24
2.5 Detection of End-of-Life and Rectifier Effect........................................................................... 25
2.5.1 Detection of End of Life 1 (EOL1) – Lamp Overvoltage........................................................ 25
2.5.2 Detection of End of Life 2 (EOL2) – Rectifier Effect.............................................................. 26
2.6 Detection of Capacitive Load .................................................................................................. 27
2.6.1 Capacitive Load 2 (Over Current / Operation below Resonance) ........................................ 28
2.6.2 Adjustable self adapting Dead Time ..................................................................................... 29
2.7 Emergency Lighting ................................................................................................................ 30
2.7.1 Short Term PFC Bus Under Voltage..................................................................................... 31
2.7.2 Long Term PFC Bus Under Voltage ..................................................................................... 32
2.8 Built in Customer Test Mode Operation.................................................................................. 33
2.8.1 Pre Heating Test Mode ......................................................................................................... 33
2.8.1.1 Skip the Pre Heating Phase – Set RTPH Pin to GND.............................................. 33
2.8.1.2 IC remains in Pre Heating Phase ............................................................................. 34
2.8.2 Deactivation of the Filament Detection ................................................................................. 35
2.8.3 Built in Customer Test Mode (Clock Acceleration) ............................................................... 36
2.8.3.1 Enabling of the Clock Acceleration........................................................................... 36
2.8.3.2 Starting the Chip with accelerated Clock.................................................................. 36
3 State Diagram ............................................................................................................................... 37
3.1 Features during different operating modes............................................................................. 37
3.2 Operating Flow of the Start UP Procedure into the Run Mode............................................... 38
3.3 Auto Restart and Latched Fault Condition Mode.................................................................... 39
4 Protection Functions Matrix........................................................................................................ 40
5 Electrical Characteristics ............................................................................................................ 41
Preliminary Datasheet
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ICB2FL02G
V1.2