Digital Power Seminar

Transcription

1 Digital Power Seminar Agenda 1.What is Digital Power 2.Benefits of Digital Power 3.Digital Power Applications 4.Levels of Integration 5.Full Digital Control 6.Solutions from Microchip for Digital Power 7. Conclusion 8. Demonstration 2

2 Digital Power What is Digital Power 3 What is Digital Power DIGITAL ANALOG No intelligence Lowest low power Low to high end products Off the shelf chips based 4

3 What is Digital Power HYBRID Analog circuit + micro Medium complexity Medium/high performances 5 What is Digital Power FULLY DIGITAL High performance High versatility Easy to upgrade 6

4 What is Digital Power Example of analog implementation (buck converter) Vin Vout RAMP GENERATOR DRIVER PWM GENERATOR NET WORK - + NET WORK Vref ANALOG COMPENSATOR Analog Solution Basic functionalities: Input and Output Voltage Monitoring Current Monitoring 7 What is Digital Power Example of hybrid implementation (buck converter) Vin Vout RAMP GENERATOR LEDs / DISPLAY COMMUNICATION DRIVER PWM GENERATOR NET WORK - + NET WORK Vref ANALOG COMPENSATOR Microcontroller based Human interface management Basic functionalities Input and Output Voltage Monitoring Current Monitoring 8

5 What is Digital Power Example of fully digital implementation (buck converter) Vin Vout LEDs / DISPLAY COMMUNICATION LOAD SHARING SYNCHRONIZATION dspic DIGITAL PWM DIGITAL CONTROLLER System management Fully digital control loops Human interface management Basic Functionalities Input and Output Voltage Monitoring Current monitoring 9 What is Digital Power But Digital Power is much more... 10

6 Digital Power Benefits of Digital Power 11 Benefits of Digital Power Digital power allows designers: 1. to be focused on a system level approach more than specific aspects of the design 2. to think of a power converter as a unit integrating multiple functionalities, on top of the power conversion itself 12

7 Benefits of Digital Power Digital power allows designers: 1. to be focused on a system level approach more than specific aspects of the design CONSEQUENCES Faster time to market 2. to think of a power Higher converter system as reliability a unit integrating multiple functionalities, Lower on system top of cost the power conversion itself Platform reusability 13 Benefits of Digital Power Benefits of Digital Power: Efficiency 1. Implementation of complex topologies 2. Implementation of hard switching 3. Implementation of advanced and sophisticated control algorithms (non linear systems) 4. Possibilty to dynamically change the control law 5. Dynamically adapt the system behavior to input and load changes 6. Possibility to dynamically switch on and off phases in multiphase systems 14

8 Benefits of Digital Power Benefits of Digital Power: Efficiency 1. Implementation of complex topologies 2. Implmentation of hard switching CONSEQUENCES 3. Implementation of advanced and sophisticated control Smaller systems algorithms No (smaller) fans needed 4. Possibilty to dynamically Market trend change compliance the control law 5. Dynamically adapt the system Lower cost behavior to input/load changes 6. Possibility to dynamically switch on and off phases in multiphase systems 15 Benefits of Digital Power Benefits of Digital Power: Power Density 1. Different control loops implemented into a single chip 2. Different functions implemented into the controller reduce the number of components i. Control ii. Supervision iii. Communication 3. High efficiency allow to reduce size of inductors, capacitors, transformers, heat sinks 16

9 Benefits of Digital Power Benefits of Digital Power: Power Density 1. Different control loops implemented into a single chip 2. Different functions implemented into the controller reduce CONSEQUENCES the number of components Compact systems i. Control Additional application areas ii. Supervision More Watts per inch 3 iii. Communication Lower cost 3. High efficiency allow to reduce size of inductors, capacitors, transformers, heat sinks 17 Benefits of Digital Power Benefits of Digital Power: Power Management 1. A converter is often part of a system 2. Interconnections are requested between the local converter and the whole system 3. Possibility to manage power conversion and distribution 4. Possibility to generate power according to real application needs 18

10 Benefits of Digital Power Benefits of Digital Power: Power Management 1. A converter is often part of a system 2. Interconnections are requested between the local CONSEQUENCES converter and the whole Higher system reliability 3. Need to manage Higher power system conversion performances and distribution Lower system cost 4. Possibility to generate Lower power generation according cost to real application needs 19 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques 1. Easy implementation in firmware of any control mode i. Voltage Mode ii. Average Current Mode iii. Peak Current Mode 2. Easy implementation in firmware of any operating mode i. Continuous Current ii. Discontinuous Current iii. Critical Current 20

11 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques 1. Easy implementation in firmware of any control mode i. Voltage mode ii. Average Current CONSEQUENCES Mode Selection of the best fitting technique iii. Peak Current Mode Higher performances Higher reliability 2. Easy implementation in Lower firmware cost of any operating mode Upgradability i. Continuous Current ii. Discontinuous Current iii. Critical Currrent 21 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques Freedom to implement a wide number of controllers i. Digital version of analog compensators ii. PI(D) iii. State variable implementation iv. Non linear controllers v. Pure digital synthesis 22

12 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques Freedom to implement a wide number of controllers i. Digital version of analog compensators ii. PI(D) CONSEQUENCES iii. State variable Control methodology implementation matches the level iv. Non linear controllers of knowledge of the designer Control methodology may be tweaked/changed according to required performances Higher performances Faster time to market v. Pure digital synthesis 23 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques 1. Use of advanced control techniques i. Multiphase systems (with variable # of phases) ii. Interleaved systems (with variable # of phases) iii. hard switching 2. Non linear, predictive, and adaptive control algorithms to get better transient response 3. Controlled voltage and/or current transitions eliminate need for over-specified components 24

13 Benefits of Digital Power Benefit of Digital Power: Advanced Techniques 1. Use of advanced control techniques i. Multiphase systems (with variable # of phases) ii. Interleaved systems (with variable # of phases) CONSEQUENCES iii. hard switching Higher power density 2. Non linear, predictive, and Greater adaptive efficiency control algorithms to get better transient response Higher reliability 3. Controlled voltage and/or current transitions eliminate need for over-specified components 25 Benefits of Digital Power Benefit of Digital Power: Integration of Functionalities 1. Fully programmable soft start 2. Fully programmable sequencing 3. Load share 4. Current share 5. Synchronization with external devices 6. Easy implementation of human interface: i. Led ii. Displays iii. Buttons 26

14 Benefits of Digital Power Benefit of Digital Power: Integration of Functionalities 1. Fully programmable soft start 2. Fully programmable sequencing 3. Load share CONSEQUENCES Lower component count Ease/versatility in changing parameters 4. Current share 5. Synchronization with external devices Expandibility (sequencing) 6. Implementation of Reliability human (current interface: share) i. Led Easier design Faster time to market ii. Displays Improved reliability iii. Buttons 27 Benefits of Digital Power Benefit of Digital Power: Versatility The core is a micro/dsp so that it is possible to: 1. Reprogram the micro i. Production line test firmware, replaced by ii. End application fw iii. Last minute fw upgrade (additional features added) 2. Change operating parameters i. Eliminated components tolerance ii. Trimming and calibration performed during board testing 3. Reuse of platform and code 28

15 Benefits of Digital Power Benefit of Digital Power: Versatility The core is a micro/dsp so that it is possible to: 1. Reprogram the micro i. Production line test firmware, replaced by ii. End application fw CONSEQUENCES iii. Last minute Reduced fw upgrade manufacturing (additional costsfeatures added) Improved reliability 2. Change operating parameters Ease of production i. Eliminated components Faster time tolerance market ii. Trimming and calibration Lower cost performed during board testing 3. Reuse of platform and code 29 Benefits of Digital Power Benefit of Digital Power: Monitoring and Protection 1. Fully programmable fault detection/management 2. Easy implementation in fw of i. Over voltage protection ii. Over current protection iii. Under voltage protection iv. Over temperature protection 30

16 Benefits of Digital Power Benefit of Digital Power: Monitoring and Protection 1. Fully programmable fault detection/management 2. Easy implementation in fw of i. Over voltage protection CONSEQUENCES ii. Over current Improved protection converter reliability iii. Under voltage Improved protection system level reliability iv. Over temperature Higher power protection density 31 Benefits of Digital Power Benefit of Digital Power: Communication 1. All parameters are configurable run time 2. All parameters can be changed locally or remotely 3. All internal values can be monitored/changed 4. All system parameters can be monitored/changed 5. Code itself can be upgraded 6. Data logging is easily implemented 7. Implementation of different communication protocols 32

17 Benefits of Digital Power Benefit of Digital Power: Communication 1. All parameters are configurable run time 2. All parameters can be changed locally or remotely 3. All internal values can be monitored/changed 4. All system parameters CONSEQUENCES can be monitored/changed 5. Code itself can be Improved upgraded reliability Longer lifetime 6. Data logging is easily implemented Ease of maintenance/upgrading 7. Implementation of different communication protocols Ease of system integration 33 Digital Power Digital Power Applications 34

18 Digital Power Applications Applications: Electrical power to electrical power converters: 1. Ac-dc i. internal power supply units ii. external power supply units iii. power factor correction front end iv. battery chargers v. lighting 35 Digital Power Applications Applications: Electrical power to electrical power converters: 2. Dc-dc i. distributed power systems ii. point oif load iii. lighting 36

19 Digital Power Applications Applications: Electrical power to electrical power converters: 3. Dc-ac (inverters) i. ups ii. solar systems iii. lighting (HID) 37 Digital Power Applications Applications: Mechanical power to/from electrical power: 1. Dc-ac: motor control 2. Ac-ac: turbines 38

20 Digital Power Level of Integration 39 Level of Integration Level 1 control improves a traditional analog power design Soft Start and Power Sequencing Voltage and Temperature Monitoring Communication and data logging 40

21 Level of Integration Level 2 Micro controls reference signals for the PWM Controller chip In addition to Level 1 control the micro will: Indirectly Set Voltage, Current and Thermal Limits Determine PWM Period and Duty Cycle Self calibration 41 Level of Integration Level 3 Analog power supply functions are integrated in the micro, and can be reconfigured if needed for changing load conditions In addition to Level 2 control the micro will: Control the feedback and PWM topology 42

22 Level of Integration PIC16HV785 Voltage Ref Software ERROR AMP Current Feedback Voltage Feedback 10-bit ADC COMP PWM Driver Vout MCP1402 Level 4 Analog feedback is removed and replaced with a complete digital DSP based control algorithm PID algorithm with Voltage or Current mode control 43 Digital Power Full Digital Control 44

23 Full Digital Control Buck Boost Board Buck Boost Board We will use it to investigate the following items: 1. Digital PWM 2. Digital Controller 3. PID implementation in a dspic 4. Analog to Digital Converter 5. Voltage Mode Implementation in a dspic 6. Average Current Mode Implementation in a dspic 45 Full Digital Control Buck-Boost Board Boost Converter Buck Converter Main Building Blocks: 2 buck converters 1 boost converter Buck Converter PWM ADC dspic33fj16gs502 46

24 Full Digital Control Buck Converter and Control Unit PWM ADC DIGITAL PWM DIGITAL CONTROLLER 47 Full Digital Control Digital PWM DIGITAL PWM MASTER PERIOD PTMR x PDC x STMR x SDC x OUTPUT LOGIC OVERRIDE LOGIC CURRENT LIMIT FAULT LOGIC DEA D TIM E PIN CTRL PWM1L PWM1H PTMR x PDC x STMR x SDC x OUTPUT LOGIC OVERRIDE LOGIC CURRENT LIMIT FAULT LOGIC DEA D TIM E PIN CTRL PWM2L PWM2H PWM ADC PTMR x PDC x STMR x SDC x OUTPUT LOGIC OVERRIDE LOGIC CURRENT LIMIT FAULT LOGIC DEA D TIM E PIN CTRL PWM3L PWM3H DIGITAL PWM DIGITAL CONTROLLER PTMR x PDC x STMR x SDC x OUTPUT LOGIC OVERRIDE LOGIC CURRENT LIMIT FAULT LOGIC DEA D TIM E PIN CTRL PWM4L PWM4H MASTER DUTY 48

25 Full Digital Control Digital Controller DIGITAL CONTROLLER Vref Boundary Check PID Σ ADC PWM ADC DIGITAL PWM DIGITAL CONTROLLER 49 Full Digital Control PID implementation with the dspic DIGITAL CONTROLLER Vref Boundary Check PID Σ ADC Buffers in RAM K A error (n) PWM ADC K A K B K C error (n-1) error (n-2) DIGITAL PWM DIGITAL CONTROLLER u ( n) = u( n 1) + Ke( n 2) + Ke( n 1) Ke( n) C B + Digital PID Equation A 50

26 Full Digital Control Digital Controller DIGITAL CONTROLLER Vref Boundary Check PID Σ ADC SAR PWM ADC DIGITAL PWM DIGITAL CONTROLLER SAR 51 Voltage Mode Control (1) Full Digital Control The analog way DRIVER FILTER Vref 52

27 Voltage Mode Control (2) Full Digital Control DRIVER FILTER Vref The digital way dspic Vref VM PID PWM PROCESS ADC 53 Full Digital Control Average Current Mode Control (1) The analog way DRIVER FILTER Vref 54

28 Full Digital Control Average Current Mode Control (2) The digital way DRIVER FILTER Vref Vref dspic Σ VM PID Σ CM PI(D) PWM PROCESS ADC ADC 55 Ac-dc Reference Design Full Digital Control Ac-dc Reference Design We will use it to investigate the following items: 1. PFC implementation 2. Soft Switching 3. Multiphase Implementation 4. Comparator 56

29 Ac-dc Reference Design Full Digital Control PHASE SHIFT DC-DC MULTIPHASE DC-DC PFC CONTROL BOARD DC-DC EMI FILTER Main Building Blocks: Emi filter Pfc Phase shift dc-c Multiphase dc-dc Single phase dc-dc Control board 57 Power Factor Correction Full Digital Control ADC PWM dspic PFC 58

30 Full Digital Control Power Factor Correction ADC PWM Voltage and Current loop Feed forward dspic PFC Vref Σ V PID X Σ I PID PWM 1/V 2 ADC ADC 59 Ac-dc Reference Design Full Digital Control PHASE SHIFT DC-DC ADC PWM dspic 60

31 Ac-dc Reference Design Full Digital Control PHASE SHIFT DC-DC ADC PWM Phase shift PWM operation Voltage loop closed via UART dspic Vref V PID PWM Phase UART UART ADC dspic dspic 61 Full Digital Control MULTIPHASE DC-DC ADC PWM dspic 62

32 Full Digital Control MULTIPHASE DC-DC ADC Multiphase Buck Fault Management PWM dspic Vref PID PWM PROCESS FAULT Mgmt ADC 63 Full Digital Control MULTIPHASE DC-DC ADC Multiphase Buck Fault Management PWM dspic CMPxA CMPxB CMPxC CMPxD CMP to PWM GLITCH FILTER INTERRUPT REQUEST AVdd/2 INTREF DAC DACOUT EXTREF dspic 64

33 Digital Power Microchip Solutions 65 Microchip Solutions Level 4 Full Digital Control Level 3 Topology Control Level 2 Proportional Control Level 1 On/off Control Levels of introduction of digital processing into power converters Microchip offers valuable solutions (hardware and software) for all the levels 66

34 Microchip Solutions Level 4 Full Digital Control Level 3 Topology Control Level 2 Proportional Control Level 1 On/off Control Technical Functions Low-power standby Programmable soft start Power up sequencing Primary/secondary communication bridge Recommended Devices PIC10F PIC12F 67 Microchip Solutions Level 4 Full Digital Control Level 3 Topology Control Level 2 Proportional Control Level 1 On/off Control Technical Functions Output voltage margining Load sharing and balancing History logging Primary/secondary communication bridge Recommended Devices PIC12F PIC16F PIC18F PIC24F 68

35 Microchip Solutions Technical Functions Recommended Devices Level 4 Full Digital Control Level 3 Topology Control Level 2 Proportional Control Level 1 On/off Control Optimize control loop for load changes Enable common platform for multiple applications Operational flexibility for different power levels PIC16HV785 MCP1631 High-Speed PWM Controller PIC18F 69 Microchip Solutions Level 4 Full Digital Control Level 3 Topology Control Level 2 Proportional Control Level 1 On/off Control Dynamic control loop adjustment Predictive control loop algorithms Technical Functions Operational flexibility for different power levels Recommended Devices dspic30f dspic33f 70

36 Microchip Solutions dspic30f DSC (MCU+DSP) 30 5V Target Power Conversion Same Base Architecture Same Base Instruction Set Same Pinout Same or Compatible Peripherals Same HW and SW Tools Same Application Libraries dspic33f DSC (MCU+DSP) V PIC24F MCU V PIC24H MCU V 71 Microchip Solutions dspic33f GS Series For Digital Power Conversion Seven Devices 18- to 44-Pin Packages 72

37 Microchip Solutions What Controller Features are needed for Digital Power? DSP Resources + MCU = Digital Signal Controller Low Cost Under 5KU Small Size As small as 6x6 mm Footprint (Industry s smallest DSC) Optimized Peripherals and Flexible Interconnect PWM with SMPS Modes, High Resolution, and HW override Software-Configurable Peripherals Fast (20 ns) Comparators Optimal ADC with multiple S&Hs for simultaneous samples Ability to Adapt to New Innovation is Key! 73 Microchip Solutions Product P I N S P K G Flash KB SRAM Bytes T I M E R S C I A N P P T U U T R E C O o u m t p p a u r t e U A R T S P I I 2 C PS PWM 10-bit 2/4 MSPS ADC Channels # inputs S/H A n a l o g C o m p. D A C o u t p u t dspic33fj06gs SOIC MSPS dspic33fj06gs SDIP SOIC QFN MSPS dspic33fj06gs SDIP SOIC QFN 6 1K MSPS dspic33fj16gs SDIP SOIC QFN 16 2K MSPS dspic33fj16gs TQFP QFN 16 2K MSPS dspic33fj16gs SDIP SOIC QFN 16 2K MSPS dspic33fj16gs TQFP QFN 16 2K MSPS

38 Microchip Solutions Analog Portfolio for Intelligent Power Applications 75 Microchip Solutions Analog Portfolio for Intelligent Power Applications: EEPROM 76

39 Microchip Solutions Explorer 16 Development Board Supports All PIC24 and dspic33f Families G MPLAB ICD 2 and MPLAB REAL ICE Emulation Interface G Alpha-numeric LCD G PICtail Plus connector to allow easy system expansion G DM (100-pin) DM (44-pin) DV (100-pin + MPLAB ICD 2) $ $ $ Microchip Solutions 16-Bit 28-pin Starter Board G G G DM (Board Only) Supports 28-pin PIC24 and dspic33f Families MPLAB ICD 2/3 and MPLAB REAL ICE Emulation Interface Ideal Prototyping Tool $

40 Microchip Solutions Plug-in Buck-Boost Board Part # AC164133, $89.99, Available Now Prototyping platform to investigate digital power conversion and digital SMPS design Supports dual-buck and single-boost stage conversion Includes example software for implementing digital dual-synchronous buck converter and boost converter Daughter Board for: 16-bit 28-Pin Starter Board ($79.99) As well as the modular Explorer 16 Board ($129.99) 79 Microchip Solutions dspicdem SMPS Buck Development Board An easy and economical way to evaluate the dspic30f202x/1010 SMPS & Digital Power Conversion family Prototyping platform to investigate digital power conversion and digital SMPS design Socketed dspic30f2020 on board Input voltage range 7V to 15V (nominal 9V) User can enable a dynamic output load to investigate transient response User potentiometers to simulate application features such as voltage trim, remote voltage sense, voltage tracking, current sharing, etc. Example software for implementing digital dual synchronous buck converter DM $

41 Microchip Solutions 300 Watt AC-to-DC Power Converter Full Digital Control Multi-stage Design Includes: Universal Inputs (85V 265V AC, Hz) Boost PFC (PF > 0.98) Soft-Start (programmable) Full-Bridge ZVT (soft-switching) Synchronous Rectification 12-Volt Intermediate Bus Multi-Phase Synchronous Buck Converter 3.3-Volt Output Single-Phase 5.0-Volt Output Automatic Fault Handling Remote Power-Management Capability Flexible Start-up Capability Complete, Free Design Details: 81 Digital Pure Sine Wave Offline UPS Input Range AC: 95 to 135V,60 HZ +/ to 280V,50 HZ +/-3 Output Voltage AC : 60 Hz +/-1 50 Hz +/-1 DC Input: 36V (12 VDC x3) Adjustable Charging Current High Efficiency Pure Sine Wave Output With THD <3% Rating: 1000 VA Steady-State Output Power 1350 VA Peak Power (Surge) Mains to Battery Transfer Time <10ms Supports Crest Factor of 3:1 Fault Indications Microchip Solutions Royalty Free Reference Design Documentation, software and Gerber files on Web 82

42 Microchip Solutions Digital GUI [ 83 Microchip Solutions Digital GUI: Available for the two Buck/Buck-Boost Boards 84

43 Microchip Solutions Digital GUI: All parameters can be selected 85 Microchip Solutions Digital GUI: Time Domain and Frequency Domain Plots 86

44 Microchip Solutions Code Examples 1. CE020 Standard Mode PWM using dspic SMPS DSC 2. CE025 dspic SMPS Negative Deadtime Example 3. CE026 dspic SMPS ADC Early Interrupt 4. CE157 Cycle by Cycle PWM Fault 5. CE158 PWM Latched Fault 6. CE159 PWM Push Pull Mode 7. CE160 Standard Mode PWM 8. CE161 True Independent PWM Output Mode 9. CE162 Complementary PWM Mode 10. CE163 PWM with Negative Deadtime 11. CE164 PWM with Independent Fault Mode 12. CE165 PWM with Leading Edge Blanking 13. CE166 Dual Trigger ADC 14. CE168 Current Reset/Variable frequency mode 15. CE169 PWM Capture Function 16. CE170 Center-Aligned PWM 87 Microchip Solutions Application Notes AN1106 Power Factor Correction in Power Conversion Applications Using the dspic DSC AN1114 Switch Mode Power Supply (SMPS) Topologies (Part I) AN1207 Switch Mode Power Supply (SMPS) Topologies (Part II) AN1208 Integrated Power Factor Correction (PFC) and Sensorless Field Oriented Control (FOC) System... more to come shortly... 88

45 Microchip Solutions Digital Design Center [ 89 Microchip Solutions QUICK DOWNLOADABLE RESOURCES View List of Related Products Download Application Software Find Development Tools Find Training Resources View Published Articles 90

46 Microchip Solutions BROWSE DESIGN CENTER Level 1: On/Off Control Level 2: Proportional Control Level 3: Topology Control Level 4: Full Digital Control 91 Microchip Solutions Technical Training and Education RTC [ high tech engineering labs conveniently located worldwide equipped with the most current embedded control tools, techniques and instructors they conduct hands-on beginner, intermediate and advanced classes on Microchip's 92

47 Microchip Solutions Technical Training and Education RTC [ Current Class Offering: PWR 3210 Digital Power Converter Design Using the dspic SMPS Family [ More Classes on Development 93 Microchip Solutions Technical Training and Education E-Learning: Web Seminars [ more than 100+ training presentations several formats (streaming video, pdf downloads, ) new courses are being added regularly material is created and presented by engineers most presentations take only 20 minutes 94

48 Technical Training and Education E-Learning: Web Seminars Microchip Solutions Current seminars Offering: 1. Introduction to Switch Mode Power Supplies (SMPS) 2. Control System Design for Power Converters 3. Switch Mode Power Supply Topologies - The Forward Converter 4. SMPS Topologies - The Buck Converter 5. SMPS Components and their affects on system Design 6. SMPS Buck Converter Design Example 7. Introduction to SMPS Control Techniques 8. Advanced SMPS Topics 9. Introduction to the dspic SMPS (part 1) 10.Introduction to the dspic SMPS (part 2) 11.Building a dspic SMPS system 95 Microchip Solutions Technical Training and Education Forum 96

49 Digital Power Conclusions 97 Digital Power Microchip is heavily committed in the: 1. Development of dspic products with specific features that make them the best choice for demanding digital power applications 2. Development of hardware tools that enable customers to immediately test the components performances 3. Development of software tools that speed up customers learning curve and supply fully working high performance digital conversion applications 4. Development of collaterals that assist designers in every step of the design process 5. Development of reference designs that enable customers to evaluate the performances of the dspic in finite applications and can be used as a start up for their final applications 98

50 Digital Power The advantages customers can have in working with Microchip are: 1. Faster learning curve of new technologies and techniques 2. Faster time to market of their products 3. Long term reliability of Microchip products (no obsoloscence) 99 Digital Power Demonstration 100

51 Digital Power 1. Buck/Boost Board with Explorer AC/DC Reference Design 3. Pure Sinewave Inverter Reference Design 4. Interleaved PFC Reference Design 101 Digital Power Thank You 102