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Freescale Semiconductor M68HC08 manual Control Theory, DC Bus Voltage, Zero, Crossing, PWM0

Models: M68HC08

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DC Bus

Control Theory

AC

AC

LINE

DC

DC Bus

Voltage

Zero	ADC
Crossing		PWM0
	IC	PWM0

MCU

PWM PWM1

FAULT

PIN

L

Reference

Voltage Comparator

+

-

Actual

Current

MOSFET

+ DC BUS

+

Current Sensing

GND

Figure 2-6. Discontinuous Conduction Mode Principle

Figure 2-7. Discontinuous Conduction Mode Current Waveform

Dimmable Light Ballast with Power Factor Correction, Rev. 1

18	Freescale Semiconductor

Image 18

Freescale Semiconductor M68HC08 manual Control Theory, DC Bus Voltage, Zero, Crossing, PWM0, MCU PWM PWM1 FAULT PIN

Contents

Designer Reference Manual M68HC08 MicrocontrollersDRM067 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. References1.2 Benefits of this Solution Chapter Introduction1.1 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 Semiconductor3.2 Dimmable Light Ballast Characteristics Chapter Reference Design3.1 Application Outline 3.3 Application Description Table 3-1.Light Ballast CharacteristicsCONTROL BOARD 3.3.2 Power Factor Correction3.3.1 Light Ballast Control MC68HC908LB83.4 Software Specification 3.5 Hardware Specification3.3.3 Protection Features Chapter Hardware Design 4.1 Hardware Implementation4.2 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 number4.2.4 Power Supply Figure 4-6.Dimmable Light Ballast - Power SupplyTable 4-3.Supplied Voltages Hardware Design Freescale SemiconductorChapter Software Design 5.1 Introduction5.2 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 Light Ballast Control 5.2.2.1 Tube Start Mode5.2.2.2 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 5.3.3 Synchronization Interrupt Routine 5.3.4 Sine Wave Generation 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 DescriptionFigure 5-8.Flow Chart - Main Flow, Part Software DesignFreescale Semiconductor Figure 5-9.Flow Chart - Main Flow, Part Detailed Software DescriptionFreescale Semiconductor Figure 5-10.Flow Chart - Main Flow, Part Software DesignFreescale 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