EVLB001 Datasheet, PDF (2/35 Pages) ATMEL Corporation – Automatic microcontroller dimmable ballast

Section 1
Introduction ........................................................................................... 1-1
1.1 General Description ..................................................................................1-3
1.2 Ballast Demonstrator Features .................................................................1-3
Section 2
Ballast Demonstrator Device Features ................................................. 2-4
2.1 Atmel Supported Products ........................................................................2-4
2.2 IXYS^® Supported Products .......................................................................2-4
Section 3
Microcontroller Port Pin Assignments ................................................... 3-6
Section 4
Ballast Demonstrator Operation ........................................................... 4-7
4.1 General Requirements ..............................................................................4-7
4.2 Startup features ........................................................................................4-7
4.3 Circuit Topology ........................................................................................4-8
4.4 Startup and PFC Description ....................................................................4-8
4.5 Lamp Operation Description ...................................................................4-10
Section 5
Device Design & Application............................................................... 5-13
5.1 Magnetics................................................................................................5-13
5.2 IXYS IXTP02N50D depletion mode Mosfet Used As Current Source ....5-13
5.3 IXYS IXD611 Half- bridge MOSFET driver .............................................5-13
5.4 IXYS IXI859 Charge Pump Regulator.....................................................5-14
5.5 IXYS IXTP3N50P PolarHVTM N-Channel Power MOSFET ...................5-15
5.6 Clare LDA111S Optocoupler...................................................................5-15
Section 6
ATPWMX Demonstrator Software ...................................................... 6-16
6.1 Main_pwmx_fluo_demo.c .......................................................................6-18
6.2 Pfc_ctrl.c .................................................................................................6-19
6.3 Lamp_ctrl.c .............................................................................................6-22
Section 7
Conclusion .......................................................................................... 7-25
7.1 Appendix 1: SWITCH DIM ......................................................................7-25
7.2 Appendix 2: Capacitor Coupled Low Voltage Supply..............................7-26
7.3 Appendix 3: PFC Basics .........................................................................7-27
7.4 Appendix 4: Bill Of Material.....................................................................7-28
7.5 Appendix 5: Schematics..........................................................................7-31
ATAVRFBKIT / EVLB001 User Guide
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7597B–AVR–10/07