Digital Switched-Mode Power Supply (SMPS) Overview main purpose p

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Digital Switched-Mode Power Supply (SMPS) Overview main purpose p

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Digital Switched-Mode Power Supply (SMPS)
Overview main purpose power supply provide clean stable power load, regardless power grid conditions. SMPS been widely used office equipment, computers, communication systems other applications because high efficiency high energy density. Benefits Power applications become more flexible universal High input power factor lowers power pollution power grid Intelligent mode management fault supervision Operating status monitored controlled real time Lower system maintenance cost
GND2 Shunt GND2
EXAMPLE DIGITAL SMPS
AC110V AC220V
Vsynch
GND1 PWM1
Voltage Regulator
Current Regulator Voltage Regulator
Current Regulator
Vref
56F801
Vref
56F8323
Freescale Ordering Information
Part Number DSP56F801 Product Highlights MHz, MIPS, SCI, SPI, ADC, PWM, Quad Timer Program Flash Program Data Flash Data MHz, MIPS, SCI, SPI, ADC, PWM, Quad Timer Program Flash Program Data Flash Data MHz, MIPS, CAN, SCI, SPI, ADC, PWMs, Quadrature Decoder, Quad Timer 31.5K Program Flash 512K Program Data Flash Data MHz, MIPS, SPI, SCI, ADC, PWM, COP, PLL, Decoder, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, on-chip relaxation oscillator, temperature sensor with 48KB Flash 12KB MHz, MIPS, SPI, SCI, ADC, PWM, COP, PLL, Decoder, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, on-chip relaxation oscillator, temperature sensor with 48KB Flash 12KB Additional Information MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH GPIO available 48-pin LQFP.
DSP56F802
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator, BootFLASH GPIO available 32-pin LQFP.
DSP56F803
MCU-friendly instruction set, OnCE debug, on-chip relaxation oscillator,2K BootFLASH, external memory expansion, GPIO available 100-pin LQFP.
MC56F8322
Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 48-pin LQFP
MC56F8323
Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 64-pin LQFP
Design Challenges Presently, vast majority SMPS implemented analog fashion. analog implementations have significant disadvantages that rectified implementing SMPS using modern digital mechanisms. Until recently, this been cost effective, performance cost processors required job. 56F800 56F8300 hybrid controllers specified here have required performance, peripherals, price targets enable SMPS make conversion from analog digital implementations. Freescale Semiconductor Solution digital 56800/E Switched-Mode Power Supply minimizes number system components, maximizes system reliability, makes possible easily advanced functions without increasing cost. performance, integrated peripherals, cost 56F800 56F8300 controllers specified here make digital SMPS possible practical.
system this example 100Watt SMPS controlled 56F801 device primary side 56F8323 secondary side. Optional components could include user interfaces, such display. During normal operation, AC/DC rectifier controlled 56F801 will correct input power factor while simultaneously rectifying input voltage. output AC/DC rectifier voltage that will feed DC/DC converter, which controlled 56F8323 device. DC/DC converter full bridge topology, used convert voltage precise constant output voltage. Power Factor Correction (PFC) converter, 56F801 samples input voltage, input current, output voltage. output voltage regulated 56F801, while maintaining same phase both input current voltage. module 56F801 produces
pulse main power component. DC/DC converter controlled 56F8323 operating phase-shifted soft-switching mode, that switching losses noise kept minimum. Control functions implemented within primary hybrid controller are: Input power factor correction Automatic detection input voltage frequency Control functions implemented within secondary hybrid controller are: Power on/off control voltage regulation Output voltage regulation DC/DC full-bridge phase-shifted control strategy Power system monitoring communication protocols (optional) Fault mode management
SG2074-2
Development Tools
Tool Type Software Product Name CW568X Vendor Freescale Semiconductor Description CodeWarriorDevelopment Studio 56800/E Hybrid Controllers With Processor Expert (Metrowerks) 56F8300 Developers Starter 56F800 Demonstration Evaluation Module 56F801 Processor Evaluation Module 56F803 Processor Evaluation Module 56F8322 56F8323 Hybrid Controllers
Hardware Hardware Hardware Hardware Hardware
MC56F8300DSK 56F800DEMO DSP56F801EVM DSP56F803EVM MC56F8323EVM
Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor
Disclaimer This document include details necessary completely develop this design. provided reference only intended demonstrate variety applications device.
SG2074-3
Notes
Learn More: Contact Technical Information Center +1-800-521-6247 +1-480-768-2130. more information about Freescale products, please visit www.freescale.com.
Freescaleand Freescale logo trademarks Freescale Semiconductor, Inc. other product service names property their respective owners. Freescale Semiconductor, Inc. 2004. rights reserved. SG2074 12/2004
December2004

Digital Switched-Mode Power Supply (SMPS) Overview main purpose p

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