ATAVRFBKIT / EVLD001 User Guide

1

7597A–AVR–02/06

Section 1

Introduction ........................................................................................... 1-1

1.1

General Description ..................................................................................1-2

1.2

Ballast Demonstrator Features .................................................................1-3

Section 2

Ballast Demonstrator Device

Features................................................................................................ 2-5

2.1

Atmel Supported Products ........................................................................2-5

2.2

IXYS

® Supported Products .......................................................................2-5

Section 3

Microcontroller Port Pin Assignments ................................................... 3-7

Section 4

Ballast Demonstrator Operation ........................................................... 4-9

4.1

General Requirements ..............................................................................4-9

4.2

Circuit Topology ........................................................................................4-9

4.3

Startup and PFC Description ..................................................................4-10

4.4

Lamp Operation Description ...................................................................4-11

Section 5

Device Design & Application............................................................... 5-15

5.1

Magnetics................................................................................................5-15

5.2

IXYS IXTP02N50D depletion mode Mosfet Used As Current Source ....5-15

5.3

IXYS IXD611 Half- bridge MOSFET driver .............................................5-15

5.4

IXYS IXI859 Charge Pump Regulator.....................................................5-16

5.5

IXYS IXTP3N50P PolarHVTM N-Channel Power MOSFET ...................5-17

Section 6

ATPWMx Demonstrator Software....................................................... 6-19

6.1

Main_pwmx_fluo_demo.c .......................................................................6-20

6.2

Pfc_ctrl.c .................................................................................................6-26

6.3

Lamp_ctrl.c .............................................................................................6-30

Section 7

Conclusion .......................................................................................... 7-33

7.1

Appendix 1: SWISS DIM .........................................................................7-33

7.2

Appendix 2: Capacitor Coupled Low Voltage Supply..............................7-34

7.3

Appendix 3: PFC Basics .........................................................................7-35

7.4

Appendix 4: Bill Of Material.....................................................................7-36

7.5

Appendix 5: Schematics..........................................................................7-39