Uninterruptable Power Supply (UPS) with DSP56F80x Overview uninte

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Uninterruptable Power Supply (UPS) with DSP56F80x
Overview uninterruptable power supply (UPS) system provides backup power supply application event electrical outage. Combining microcontroller unit (MCU) digital signal processor (DSP) single chip allows creation digital offering higher performance lower cost. Benefits Combines calculation ability with controller function single chip Offers unique configuration peripherals on-board memory cost
Voltage Line Input Battery
ONLINE CONTROLLED DSP56F80X
On-chip SCIs allow connection into local network Out-of-the-box software components designed expedite time-to-market reduce development costs
Filter
Line Output
Battery Voltage Current Sensing Output Voltage Current Sensing
Temperature Sensing
Battery Charger Gate Driver
Battery Boost Gate Driver
Fault
DC-Bus Voltage Sensing
High Side Driver
Side Driver
Fault
Fault1 ADC6 PWM2 PWM3 ADC4 ADC5 ADC0 ADC1 PWM0
Fault0 PWM1 ADC2 ADC3
DSP5680x
Freescale Ordering Information
Part Number DSP56F803 Product Highlights MHz, MIPS, CAN, SCI, SPI, ADC, PWMs, Quadrature Decoder, Quad Timer 31.5K Program Flash 512K Program Data Flash Data MHz, MIPS, CAN, SCIs, SPI, ADC, PWMs, Quadrature Decoder, Quad Timer 31.5K Program Flash 512K Program Data Flash Data MHz, MIPS, CAN, SCIs, SPI, ADCs, PWMs, Quadrature Decoder, Quad Timer Program Flash Program Data Flash Data MHZ, MIPS, 144KB Flash 12KB RAM, with SPI, SCI, ADC, PWM, COP, PLL, Decoders, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, temperature sensor. Additional Information MCU-friendly instruction set, OnCE debug, onchip relaxation oscillator, BootFLASH, external memory expansion, GPIO available 100-pin LQFP
DSP56F805
MCU-friendly instruction set, OnCE debug, onchip relaxation oscillator, BootFLASH, external memory expansion, GPIO available 144-pin LQFP
DSP56F807
MCU-friendly instruction set, OnCE debug, onchip relaxation oscillator, BootFLASH, external memory expansion, GPIO available both 160-pin LQFP MAPBGA
MC56F8345
Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges, with GPIOs 128-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 144-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 160-pin LQFP.
MC56F8346
MC56F8347
MC56F8355
MHZ, MIPS, 280KB Flash 20KB RAM, with SPI, SCI, ADC, PWM, COP, PLL, Decoders, Quad Timers, FlexCAN, MCU-friendly instruction set, Enhanced OnCE debug, temperature sensor.
Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 128-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 144-pin LQFP. Industrial (-40°C 105°C) Extended (-40°C 125°C) Temperature Ranges with GPIOs 160-pin LQFP.
MC56F8356
MC56F8357
Design Challenges Although traditionally been designed analog circuitry, digital UPSs preferred. These devices low-cost MCUs DSPs offer sophisticated control algorithms with highly flexible software, ability user interfaces, reduce components, introduce testing procedures, increase reliability. Several basic topologies exist, differentiated function during power outage. online offers greatest reliability continuity power supply. During normal operation,
load connected inverter powered battery and/or another inverter. power outage occurs, inverter supplied battery with switching switching delay. Freescale Semiconductor Solution Freescale Semiconductor DSP56F80x family well-suited digital control, combining DSP's calculation ability with MCU's controller function single chip. Each family members offers unique configuration peripherals onboard memory.
figure page shows online controlled Freescale Semiconductor DSP56F80x. This design produces optimal system through single DSP56F80x controller. controller monitors necessary parameters, such voltage, current, temperature, controls individual subsystems. sensing blocks contain simple circuitry that brings measurements within range DSP's analog-to-digital converters (ADCs). Details basic blocks, peripherals' utilization, brief software description follow.
SG2070-2
AC/DC Converter AC/DC converter generates voltage UPS. rectifier supplies both output current battery-charging current. simplest AC/DC converter standard half-bridge rectifier, containing diodes (D1, D2), requires control means. advantage simple reliable design. drawback nonsinusoidal input current with high harmonic content electromagnetic interference (EMI) that becomes more apparent high-power systems. sinusoidal input current required, implement DSP-controlled active power factor correction (PFC) circuit. DC/AC Inverter DC/AC inverter generates output voltage, which must sinusoidal with specific frequency amplitude (equal main line voltage). inverter contains power switches half-bridge configuration with antiparallel diodes (Q3, Q4). Both power devices (isolating gate bipolar transistors, IGBTs) controlled through drivers using pulse width modulation (PWM). When filtered, sinusoidal output voltage generated. limitation this topology amplitude generated sinusoidal voltage that depends voltage level. output voltage approximately equal input voltage: Vrms_out Vrms_in power devices output filter create voltage drop several volts, which within voltage tolerance. more precise output voltage required, voltage transformer added output. voltage level battery critical, because DC/DC boost converter
(see below) increase voltage required voltage level. generates sinusoidal modulated complementary pulses channels limited turn-on turn-off time power switches, dead-time inserted between complementary switching instances disables burn-out inverter. audible noise, switching frequency must about 16-20 kHz. DSP56F80x on-chip module with dedicated hardware circuitry meets these requirements, containing complementary channels with dead-time, protection block, other features. algorithm controls output voltage using voltage control loop, current control loop, sine wave generation. algorithm requires voltage current feedback, simple voltage current sensors detect appropriate analog values. DSP's on-chip reads voltage ADC2 current ADC3 appropriate instances given control loop time constants. inverter also contains circuitry protect against output overcurrent. Output current compared with maximum allowed value, generated fault signal DSP's fault input, Fault overcurrent detected, inverter disabled main relay switches bypass. DC/DC Converter DC/DC converter accommodates basic functions: charging battery when required providing appropriate level voltage inverter main line disconnected. Often battery voltage lower than voltage, DC/DC converter increases voltage appropriately. hardware circuitry
contains IGBT half-bridge with antiparallel diodes. Both transistors half-bridge controlled from unit. channels independent edge-aligned mode, which controls power switches individually. Overcurrent protection circuitry available. unit control fault handling from individual fault inputs separately, even DC/DC converter faults, DC/AC inverter operation continues voltage present. battery protected from high temperature: temperature sensed (ADC6) fault state evaluated. IGBT half-bridge used both charging boost operations described below: Battery Charger. battery charger charges battery from bus. battery's voltage charging current sensed voltage sensor (ADC5) current sensor (ADC4) connected DSP. control algorithm controls charging current through module upper power switch (Q1) bridge (PWM2). lower switch (Q2) permanently switched this mode. Boost Converter. boost converter supplies from battery through inductance boost current voltage sensed voltage (ADC0, ADC1) sensors current (ADC4) sensor. control algorithm controls voltage through module lower power switch (Q2) bridge (PWM3). upper switch (Q1) permanently switched this mode operation, operates standard boost converter.
SG2070-3
Development Tools
Tool Type Software Software Product Name CW568X MSW3SDK000AA Vendor Freescale Semiconductor Freescale Semiconductor Description CodeWarriorDevelopment Studio 56800/E Hybrid Controllers with Processor Expert (Metrowerks) Software infrastructure that allows development efficient, high level software applications that fully portable reusable across 56800/56800E family processors. CodeWarrior Software Development Tools 56800 (Metrowerks) 56F800 Demonstration Evaluation Module 56F803 Evaluation Module 56F805 Evaluation Module 56F807 56F8300 Developers Start Evaluation Module 56F8345, 56F8346, 56F8347, 56F8355, 56F8356, 56F8357 Emulation Support 56F80x Processors (Requires Ethernet Network)
Software Hardware Hardware Hardware Hardware Hardware Hardware Development
CWDSP56800 56F800DEMO DSP56F803EVM DSP56F805EVM DSP56F807EVM MC56F8300DSK MC56F8357EVM DSPOSRTOS
Freescale Semiconductor Freescale Semiconductor Freescale Semiconductor 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.
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. SG2070 12/2004
December2004

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