Freescale Semiconductor M68HC08 manual Dimmable Light Ballast Inverter

Page 29

System Modules

J2

TUBE Connector

HALF BRIDGE

OUTPUT INDUCTANCE CIRCUITY

O1 O2 O3 O4 O5 O6 O7 O8

 

 

DCB

 

 

 

 

15V/1

R15 10R

 

 

D3

 

 

MURA160

 

 

 

 

IC1

 

 

 

1

Vcc

VB

8

 

2

7

TOP

HIN

HO

3

6

BOT

LIN

Vs

4

5

 

COM LO

2

 

 

 

IR2106

 

 

C13

 

 

 

 

 

1

1uF

 

 

 

 

25V

 

 

 

Q5

 

IRF830A

D

 

R16 33R

 

G

 

 

S

C11

 

100nF

 

 

D

R18 33R

 

G

 

Q6

S

IRF830A

 

2 12 1

1

2

3

4

5

6

7

8

C26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10nF 630V TC356

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

D4

 

2

7

4

5

4

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESONANT CIRCUIT

 

BZG05C22

L4B

 

L4C

 

 

L5D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAT7

 

HEAT7

 

 

HEAT6

 

 

1KV

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

C12

 

L3D

DIFF8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

6

3

6

 

 

 

 

 

100nF

 

4

5

 

 

 

 

 

 

 

 

 

 

3

1

2

 

 

1

2

 

L4D

L5C

 

 

 

 

L7

 

 

 

 

 

 

 

 

HEAT7HEAT6

 

 

 

 

RES5

 

 

 

1

8

R17

10K

 

 

 

 

 

 

 

1mH

1

C15

 

L3A

DIFF8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1KV

 

8n2

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

D5

 

 

 

 

 

 

 

 

D6

 

 

 

 

 

 

 

 

 

 

 

 

0R

Tube Current 1

 

 

 

 

 

 

7

2

 

 

 

R152

BAT48

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BZG05C22

 

 

 

 

 

 

 

 

 

GND

Tube Voltage difference

C17 6n8

GND GND

 

 

 

L5B

GND

2

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAT6

 

R19

D7

 

R20

 

 

 

 

 

20R

MBRS140

C16

 

 

2

7

 

0.5W

 

22nF

10K

 

 

 

1

 

 

 

D8

 

R21

 

 

 

 

 

 

BAT48

0R

3K3

DIFF8 L3B GND

 

GND

D9

 

 

R151

 

 

 

R150 0R

 

 

 

 

 

 

 

BAT48

 

 

 

 

 

 

 

2

 

Tube Current 2

R22

 

R24

 

 

 

 

 

 

 

R23

D10

 

 

 

30K

 

N/P

 

C18

R25

 

 

 

 

 

20R

MBRS140

22nF

 

 

 

GND

 

0.5W

 

 

10K

 

 

 

 

 

1

 

 

 

DIFFERENT VOLTAGE SENSING

 

 

 

GND

 

TUBE CURRENTS SENSING

Figure 4-4. Dimmable Light Ballast — Inverter

Dimmable Light Ballast with Power Factor Correction, Rev. 1

Freescale Semiconductor

29

Image 29
Contents Dimmable Light Ballast with Power Factor Correction Page Designer Reference Manual Dimmable Light Ballast with Power Factor CorrectionDraft 2 for Review Chapter Control Theory Contents Chapter IntroductionChapter Reference Design Chapter Hardware DesignAppendix A. Schematics and Part List Chapter Demo SetupChapter Software Design Appendix B. ReferencesIntroduction Benefits of this SolutionMC68HC908LB8 Microcontroller MC68HC908LB8 Microcontroller Freescale Semiconductor Fluorescent Lamp Operation Fluorescent Lamp Control TheoryTypical Low Pressure Fluorescent Tube I/V Characteristic Typical Fluorescent Tube Equivalent Circuit in Steady State Controlling the Fluorescent LampControl Theory PFC Control Theory Main Characteristics of the Dual Switch TopologiesDigital Power Factor Concept Hysteresis Current Control Mode Hysteresis Current Control Mode Current Waveform Digital Power Factor Concept Discontinuous Conduction ModeDiscontinuous Conduction Mode Principle Generated Input Current Waveform Concept SummaryFreescale Semiconductor Application Outline Dimmable Light Ballast CharacteristicsApplication Description Light Ballast CharacteristicsLight Ballast Control Power Factor CorrectionHardware Specification Software SpecificationProtection Features Software SpecificationSystem Modules Hardware ImplementationInput and PFC Dimmable Light Ballast Input and PFC Inverter Dimmable Light Ballast Inverter Microcontroller J1 Luminance Header Dimmable Light Ballast MicrocontrollerJ2 Interface Header Supplied Voltages Power SupplyFreescale Semiconductor Control Algorithm Description Chapter Software DesignDC-bus Voltage Control Power Factor Correction ControlTube Start Mode Roundi tmin ⋅ AD max ⁄ i max Software Implementation Initialization SetupPWM Setup PWM Frequency = BusFrequency Hz Hz Main Program Loop Sine Wave Generation Interrupt Routine Synchronization Interrupt RoutineFlow Chart Sine Wave Generation Interrupt Routine Fault Detection and Processing Detailed Software Description Flow Chart timovISR and faultISRFlow Chart Main Flow, Part Reference sine gain Yes Is preheat frequency reached? Has 1ms gone? 10. Flow Chart Main Flow, Part Microcontroller Peripheral Usage Microcontroller UsageProgram and Data Memory Usage Memory UsageI/O Usage Definitions of Constants and Variables3 I/O Usage System Setup Definitions Defines the maximum HRP frequency in kHz during run mode Defines the minimum HRP frequency in kHz during run modeRepresents the number of fault states during run mode Represents the number of fault states during tube ignitionExtern tSWFLAGS Swflags System Constants and VariablesExtern tU08 CurrT1 Software Setup Hardware SetupRequired Software Tools Building and Uploading the ApplicationProject Files Executing the Application\prm\P&EFCSlinker.prm, linker program file \Sources\main.c, main programSchematics Appendix A. Schematics and Part List7mH 7mH Figure A-3. Inverter TOP BOT TOP Figure A-6. Power supply Table A-1. Printed Circuit Board Parts List Parts ListInternational IRF830A Dimmable Light Ballast with Power Factor Correction, Rev Appendix B. References Dimmable Light Ballast with Power Factor Correction, Rev Page How to Reach Us
Related manuals
Manual 30 pages 41.27 Kb

M68HC08 specifications

Freescale Semiconductor, known for its innovative solutions in the field of embedded systems, developed the M68HC08 microcontroller family, which includes the MC68HC908QT2. This 8-bit microcontroller is engineered to meet the demands of diverse applications, including automotive, industrial, and consumer electronics.

The MC68HC908QT2 is designed around Freescale’s M68HC08 core, which is renowned for its efficient and reliable performance. This microcontroller integrates a powerful instruction set, enabling developers to create high-performance applications with relatively low power consumption. The device operates at a clock frequency of up to 3 MHz, which is adequate for various control tasks.

One of the key features of the MC68HC908QT2 is its memory architecture. It includes a 2 KB Flash memory for program storage, representing a significant advantage for developers requiring non-volatile memory. Additionally, it encompasses 128 bytes of EEPROM memory, allowing for data retention even after power loss. The microcontroller also has 256 bytes of RAM for efficient data manipulation during operation.

In terms of input/output capabilities, the MC68HC908QT2 supports a variety of interfacing options. The microcontroller features up to 20 general-purpose I/O pins for flexibility in connecting with peripheral devices. Additionally, it provides multiple analog-to-digital converters (ADC) and timers that facilitate efficient analog signal processing and precise control through timing functions.

The architecture of the MC68HC908QT2 also incorporates sophisticated on-chip peripherals, enhancing its functionality. These peripherals include PWM (Pulse Width Modulation) outputs, which are essential for applications requiring motor control and other precise duty cycle processes. The integrated watchdog timer ensures reliable operation by resetting the system in the event of an application failure.

Moreover, the MC68HC908QT2 is equipped with an efficient power management system, enabling operation in a low-power mode, ideal for battery-powered applications. This microcontroller is packaged in a compact 28-pin dual in-line package (DIP), making it suitable for space-constrained designs.

In summary, the Freescale Semiconductor MC68HC908QT2 microcontroller is distinguished by its robust performance, extensive memory options, and versatile I/O capabilities. Its advanced features, including built-in timers, ADC, and a power management system, make it an exceptional choice for developers seeking to implement reliable and efficient embedded solutions. With its comprehensive architecture, the MC68HC908QT2 remains a popular choice in the landscape of 8-bit microcontrollers.