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Freescale Semiconductor M68HC08 manual

Models: M68HC08

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Software Design
	for timing 1 ms intervals.
8.	extern tU08	curr_T1;
	This variable represents the current in tube 1.
9.	extern tU08	curr_T2;
	This variable represents the current in tube 2.

10.extern tU08 avg_CurrentT1T2;

This variable represents the average value of the tube currents.

11.	extern tU16	mscounter;
	This variable counts 1 ms intervals. It is incremented every 1 ms. It is used for application timing.
12.	extern tU08	sineGain;
	This variable represents the gain of the reference sine waveform.
13.	extern tU16	timCntVal;
	This variable represents an auxiliary variable used to get the timer value required to trim the
	internal oscillator to the reference frequency (frequecy of mains * 2)
14.	extern tU08	aux;
	This variable represents an auxiliary variable.
15.	extern tU16	ramp;
	This variable represents an auxiliary variable (HRP frequency) for dimming by ramping.
16.	extern tU08	currFltCNT;
	This variable represents the number of fault states occurring during run mode.
17.	extern tU08	currFltMS;
	This variable counts the zero current checking interval. It is incremented every 1 ms.
18.	extern tU08	ignitFltCNT;
	This variable represents the number of fault states occurring during tube ignition.

19.extern tU16 integralPortionK_1;

This variable represents integral n-1 value of the PI PFC stage regulator.

20.extern tU08 proportionalGain;

This variable represents proportional gain of the PI PFC stage regulator.

21.	extern	tU08	integralGain;
	This variable represents integral gain of the PI PFC stage regulator.
22.	extern	tU08	uCreq;
	This variable represents the required value of the DC-bus voltage.

23.extern tU16 integralPortionK_1I;

This variable represents integral n-1 value of the PI ballast stage regulator.

24.extern tU08 proportionalGainI;

This variable represents proportional gain of the PI ballast stage regulator.

25.	extern tU08		integralGainI;
	This variable represents integral gain of the PI ballast stage regulator.
26.	extern	tU08	req_Cur;
	This variable represents the actual value of the required dimming value.
27.	extern	tU08	time500us;

This variable counts PWM interrupts. The variable is incremented at every PWM interrupt. It is used for timing 500 us intervals.

Dimmable Light Ballast with Power Factor Correction, Rev. 1

56	Freescale Semiconductor

Image 56

Freescale Semiconductor M68HC08 manual

Contents

DRM067 Rev. 1 12/2005 Designer Reference ManualM68HC08 Microcontrollers Page Designer Reference Manual Draft 2 for Review Freescale SemiconductorContents Chapter Introduction Chapter Control TheoryChapter Reference Design Chapter Hardware DesignChapter Demo Setup Appendix A. Schematics and Part ListChapter Software Design Appendix B. References1.1 Introduction 1.2 Benefits of this SolutionChapter Introduction 1.3 The MC68HC908LB8 Microcontroller 7-bitkeyboard interrupt Introduction Freescale SemiconductorChapter Control Theory 2.1 Introduction2.1.1 Fluorescent Lamp Control Theory 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 MCU PWM PWM1 FAULT PIN Control TheoryDC Bus Voltage Zero2.2.4 Concept Summary Figure 2-8.Generated Input Current WaveformControl Theory Freescale Semiconductor3.1 Application Outline 3.2 Dimmable Light Ballast CharacteristicsChapter Reference Design 3.3 Application Description Table 3-1.Light Ballast Characteristics3.3.2 Power Factor Correction 3.3.1 Light Ballast ControlCONTROL BOARD MC68HC908LB83.3.3 Protection Features 3.4 Software Specification3.5 Hardware Specification 4.2 System Modules Chapter Hardware Design4.1 Hardware Implementation 4.2.1 Input and PFC Hardware DesignFigure 4-3.Dimmable Light Ballast - Input and PFC 4.2.2 Inverter Freescale SemiconductorFigure 4-4.Dimmable Light Ballast - Inverter System ModulesFreescale Semiconductor HALF BRIDGE4.2.3 Microcontroller Signal System ModulesPin number TOP BOT Comp Comp Out Zero DetectSignal Table 4-2.J2 Interface HeaderHardware Design Pin numberTable 4-3.Supplied Voltages 4.2.4 Power SupplyFigure 4-6.Dimmable Light Ballast - Power Supply Hardware Design Freescale Semiconductor5.2 Control Algorithm Description Chapter Software Design5.1 Introduction 5.2.1 Power Factor Correction Control 5.2.1.2 Phase Shift Synchronization5.2.1.4 Generation of Output PFC Control SIgnal 5.2.1.1 DC-busVoltage Control5.2.2.2 Luminance Level Control Tube Run Mode 5.2.2 Light Ballast Control5.2.2.1 Tube Start Mode q = itADmin - A ⋅ ek ⋅ ADmin ireq = A ⋅ ek ⋅ ireqAD + qrounditmin ⋅ ADmax ⁄ imax rounditmax ⋅ ADmax ⁄ imax5.3.1 Initialization Setup 5.3 Software Implementation5.3.1.1 PWM Setup 5.3.1.2 HRP Setup PWM Frequency =BusFrequency Hz Hz5.3.2 Main Program Loop Freescale Semiconductor 5.3.3 Synchronization Interrupt Routine5.3.4 Sine Wave Generation Interrupt Routine Set 1ms flag and reset 1ms counter Software Designinterrupt void pwmISRvoid Read new PWM value from table * sineGain5.3.4.1 Fault Detection and Processing 5.4 Detailed Software Description Figure 5-6.Flow Chart - timovISR and faultISRSoftware Design Stop HRPFigure 5-7.Flow Chart - Main Flow, Part Detailed Software DescriptionFreescale Semiconductor Figure 5-8.Flow Chart - Main Flow, PartSoftware Design Freescale Semiconductor Figure 5-9.Flow Chart - Main Flow, PartDetailed Software Description Freescale Semiconductor Figure 5-10.Flow Chart - Main Flow, PartSoftware Design 5.5.1.1 High Resolution PWM HRP 5.5.1.4 Timer Interface Module TIM5.5 Microcontroller Usage 5.5.1 Microcontroller Peripheral Usage5.6 Definitions of Constants and Variables 5.5.3 I/O UsageSoftware Design I/O pin5.6.1 System Setup Definitions defines the minimum HRP frequency in kHz 5.6.2 System Constants and Variables Page Chapter Demo Setup 6.1 Hardware Setup6.2 Software Setup 6.2.1 Required Software Tools6.2.3 Executing the Application 6.2.4 Project Files\prm\P&E FCS linker.prm, linker program file \Sources\pi controller.c, PI regulators fileAppendix A. Schematics and Part List A.1 Schematics2.7mH PFC Current SenseComp PFC GatePFC Current Sense CompPFC Gate Zero DetectFigure A-3.Inverter DCB TOP BOTO1 O2 O3 O4 O5 O6 O7 O8 COM LOTOP BOT Comp - Comp Out Zero Detect Serial DataSerial Data DCB Divider Tube Current Tube Current Tube Voltage differenceGND Serial Data5Serial Data DCB Divider Tube Current Tube Current Tube Voltage differenceFigure A-6.Power supply A.2 Parts List DESIGNATORSQUANTITY DESCRIPTIONDESIGNATORS QUANTITYDESCRIPTION MANUFACTURERFreescale Semiconductor Appendix B. References Freescale Semiconductor Page How to Reach Us Home PageE-mail USA/Europe or Locations Not Listed