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Freescale Semiconductor M68HC08 manual Software Specification, Hardware Specification

Models: M68HC08

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3.3.3 Protection Features

Reference Design

the PFC switch in hysteresis current control mode or output is used for switch off PWM1 in DCM. Than PWM1 signal is used directly for switching the PFC switch transistor.

3.3.3 Protection Features

During the startup phase and run phase, some erroneous states can occur. When the DC-bus voltage does not reach the required value or is out of limits then a fault signal is generated. The DC-bus voltage is also checked against limits in run mode. If any of the previously mentioned faults occurs, all modules are disabled, lamps go out, and the fault diode blinks.

3.4 Software Specification

The software is written in C. The software specifications are listed in Table 3-2. A useful feature of this application is the ability to debug software via the MON08 CYCLONE debug tool connected to JP1 header connector. The Real-Time Debugger from Metrowerks can be used as a debug tool.

Table 3-2. Software Specification

	Dithering control

Control Algorithm	Current loop control

	Voltage loop control

Target Processor	MC68HC908LB8

Language	C with some arithmetical functions in assembler

Compiler	Metrowerks ANSI-C/C++ Compiler for HC08

MCU Oscillator Frequency	16 MHz (with default software setting)

MCU Bus Frequency	4 MHz (with default software setting)

Targeted Hardware	Dimmable Light Ballast With PFC Demo Board

A detailed description of how to set Debugger for commutation with MON08 CYCLONE is given in Reference [2]. For safe debugging it is recommended use an opto-isolation board connected between the MON08 CYCLONE and the Light Ballast Demo Board. The Opto-isolation Board user manual can be found in Reference [3].

3.5 Hardware Specification

The other system specifications are determined by the target hardware and lamp characteristics. The board and its connections are shown in Chapter 4 Hardware Design.

This hardware set is designed for fluorescent lamp and mains voltage. The specifications for a high voltage hardware and fluorescent lamp set are listed in Table 3-1. The hardware operates on 230 VAC and 110 VAC mains.

Dimmable Light Ballast with Power Factor Correction, Rev. 1

24	Freescale Semiconductor

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Freescale Semiconductor M68HC08 manual Software Specification, Hardware Specification, Protection Features

Contents

Designer Reference Manual M68HC08 MicrocontrollersDRM067 Rev. 1 12/2005 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. References1.2 Benefits of this Solution Chapter Introduction1.1 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 Semiconductor3.2 Dimmable Light Ballast Characteristics Chapter Reference Design3.1 Application Outline 3.3 Application Description Table 3-1.Light Ballast Characteristics3.3.2 Power Factor Correction 3.3.1 Light Ballast ControlCONTROL BOARD 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 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 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 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 Light Ballast Control 5.2.2.1 Tube Start Mode5.2.2.2 Luminance Level Control Tube Run 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 5.3.3 Synchronization Interrupt Routine 5.3.4 Sine Wave Generation Interrupt RoutineFreescale Semiconductor 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 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 5.5.1.1 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