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Freescale Semiconductor M68HC08 manual Hardware Design, Freescale Semiconductor

Models: M68HC08

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Hardware Design

Dimmable Light Ballast with Power Factor Correction, Rev. 1

34	Freescale Semiconductor

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Freescale Semiconductor M68HC08 manual Hardware Design, Freescale Semiconductor

Contents

M68HC08 Microcontrollers Designer Reference ManualDRM067 Rev. 1 12/2005 Page Designer Reference Manual Draft 2 for Review Freescale SemiconductorChapter Reference Design Contents Chapter IntroductionChapter Control Theory Chapter Hardware DesignChapter Software Design Chapter Demo SetupAppendix A. Schematics and Part List Appendix B. ReferencesChapter Introduction 1.2 Benefits of this Solution1.1 Introduction 1.3 The MC68HC908LB8 Microcontroller 7-bitkeyboard interrupt Introduction Freescale Semiconductor2.1.1 Fluorescent Lamp Control Theory Chapter Control Theory2.1 Introduction 2.1.2 Fluorescent Lamp OperationGas filling mixture 2.1.3 Controlling the Fluorescent Lamp Freescale SemiconductorFreescale Semiconductor 2.2PFC Control Theory 2.2.1 IntroductionFreescale Semiconductor Freescale Semiconductor DC Bus Voltage MCU PWM PWM1 FAULT PINControl Theory Zero2.2.4 Concept Summary Figure 2-8.Generated Input Current WaveformControl Theory Freescale SemiconductorChapter Reference Design 3.2 Dimmable Light Ballast Characteristics3.1 Application Outline 3.3 Application Description Table 3-1.Light Ballast CharacteristicsCONTROL BOARD 3.3.2 Power Factor Correction3.3.1 Light Ballast Control MC68HC908LB83.5 Hardware Specification 3.4 Software Specification3.3.3 Protection Features 4.1 Hardware Implementation Chapter Hardware Design4.2 System Modules 4.2.1 Input and PFC Hardware DesignFigure 4-3.Dimmable Light Ballast - Input and PFC 4.2.2 Inverter Freescale SemiconductorFreescale Semiconductor Figure 4-4.Dimmable Light Ballast - InverterSystem Modules HALF BRIDGE4.2.3 Microcontroller Pin number SignalSystem Modules TOP BOT Comp Comp Out Zero DetectHardware Design SignalTable 4-2.J2 Interface Header Pin numberFigure 4-6.Dimmable Light Ballast - Power Supply 4.2.4 Power SupplyTable 4-3.Supplied Voltages Hardware Design Freescale Semiconductor5.1 Introduction Chapter Software Design5.2 Control Algorithm Description 5.2.1.4 Generation of Output PFC Control SIgnal 5.2.1 Power Factor Correction Control5.2.1.2 Phase Shift Synchronization 5.2.1.1 DC-busVoltage Control5.2.2.1 Tube Start Mode 5.2.2 Light Ballast Control5.2.2.2 Luminance Level Control Tube Run Mode rounditmin ⋅ ADmax ⁄ imax q = itADmin - A ⋅ ek ⋅ ADminireq = A ⋅ ek ⋅ ireqAD + q rounditmax ⋅ ADmax ⁄ imax5.3.1 Initialization Setup 5.3 Software Implementation5.3.1.1 PWM Setup BusFrequency 5.3.1.2 HRP SetupPWM Frequency = Hz Hz5.3.2 Main Program Loop 5.3.4 Sine Wave Generation Interrupt Routine 5.3.3 Synchronization Interrupt RoutineFreescale Semiconductor interrupt void pwmISRvoid Set 1ms flag and reset 1ms counterSoftware Design Read new PWM value from table * sineGain5.3.4.1 Fault Detection and Processing Software Design 5.4 Detailed Software DescriptionFigure 5-6.Flow Chart - timovISR and faultISR Stop HRPFigure 5-7.Flow Chart - Main Flow, Part Detailed Software DescriptionSoftware Design Figure 5-8.Flow Chart - Main Flow, PartFreescale Semiconductor Detailed Software Description Figure 5-9.Flow Chart - Main Flow, PartFreescale Semiconductor Software Design Figure 5-10.Flow Chart - Main Flow, PartFreescale Semiconductor 5.5 Microcontroller Usage 5.5.1.1 High Resolution PWM HRP5.5.1.4 Timer Interface Module TIM 5.5.1 Microcontroller Peripheral UsageSoftware Design 5.6 Definitions of Constants and Variables5.5.3 I/O Usage I/O pin5.6.1 System Setup Definitions defines the minimum HRP frequency in kHz 5.6.2 System Constants and Variables Page 6.2 Software Setup Chapter Demo Setup6.1 Hardware Setup 6.2.1 Required Software Tools\prm\P&E FCS linker.prm, linker program file 6.2.3 Executing the Application6.2.4 Project Files \Sources\pi controller.c, PI regulators fileAppendix A. Schematics and Part List A.1 SchematicsComp 2.7mHPFC Current Sense PFC GatePFC Gate PFC Current SenseComp Zero DetectO1 O2 O3 O4 O5 O6 O7 O8 Figure A-3.InverterDCB TOP BOT COM LOSerial Data DCB Divider Tube Current Tube Current TOP BOT Comp - Comp Out Zero DetectSerial Data Tube Voltage differenceSerial Data DCB Divider Tube Current Tube Current GNDSerial Data5 Tube Voltage differenceFigure A-6.Power supply QUANTITY A.2 Parts ListDESIGNATORS DESCRIPTIONDESCRIPTION DESIGNATORSQUANTITY MANUFACTURERFreescale Semiconductor Appendix B. References Freescale Semiconductor Page E-mail How to Reach UsHome Page USA/Europe or Locations Not Listed