Microchip-dsPIC33-Explorer-16数字电源开发方案

MicrochipdsPIC33Explorer16数字电源开发方案关键词：电源管理,数字电源,DC／DC转换器,AC／DC转换器Microchip公司的dsPIC33FJxxGSxx系列是高性能16位数字信号控制器,包括有扩展的DSP功能和高性能16位微控制器(MCU)架构.工作电压时的性能高达40MIPS,主要用于AC/DC转换器,汽车电子HID,电池充电器,DC/DC转换器,数字照明,电磁炉,LED镇流器,可再生能源以及UPS等.本文介绍dsPIC33FJxxGSxx系列主要特性,方框图,多种转换构成框图以及Explorer16数字电源开发板电路图.

dsPIC33主要特性:

OperatingRange:

•Upto40MIPSoperation(at3.0-3.6V):

-Industrialtemperaturerange(-40℃to+85℃)

-Extendedtemperaturerange(-40℃to+125℃)

High-PerformanceDSCCPU:

•ModifiedHarvardarchitecture

•Ccompileroptimizedinstructionset

•16-bitwidedatapath

•24-bitwideinstructions

•Linearprogrammemoryaddressingupto4Minstructionwords

•Lineardatamemoryaddressingupto64Kbytes

•83baseinstructions:mostly1word/1cycle

•Two40-bitaccumulatorswithroundingandsaturationoptions

•Flexibleandpowerfuladdressingmodes:

-Indirect

-Modulo

-Bit-Reversed

•Softwarestack

•16x16fractional/integermultiplyoperations

•32/16and16/16divideoperations

•Single-cyclemultiplyandaccumulate:

-AccumulatorwritebackforDSPoperations

-Dualdatafetch

•Upto±16-bitshiftsforupto40-bitdata

DirectMemoryAccess(DMA):

•4-channelhardwareDMA

•1KbytedualportedDMAbufferarea(DMARAM)tostoredatatransferredviaDMA:

-AllowsdatatransferbetweenRAMandaperipheralwhileCPUisexecutingcode(no

cyclestealing)

•MostperipheralssupportDMA

DigitalI/O:

•Upto85programmabledigitalI/Opins

•Wake-up/Interrupt-on-Changeforupto24pins

•Outputpinscandrivevoltagefrom3.0Vto3.6V

•Upto5Voutputwithopendrainconfiguration

•5Vtolerantdigitalinputpins

•16mAsource/sinkonallPWMpins

On-ChipFlashandSRAM:

•Flashprogrammemory(upto64Kbytes)

•DataSRAM(upto8Kbytes)

•BootandGeneralSecurityforprogramFlash

PeripheralFeatures:

•Timer/Counters,uptofive16-bittimers

-Canpairuptomakeone32-bittimer

•InputCapture(uptofourchannels):

-Captureonup,downorbothedges

-16-bitcaptureinputfunctions

-4-deepFIFOoneachcapture

•OutputCompare(uptofourchannels):

-SingleorDual16-bitComparemode

-16-bitGlitchlessPWMmode

•4-wireSPI(uptotwomodules):

-FramingsupportsI/Ointerfacetosimplecodecs

-1-deepFIFObuffer

-Supports8-bitand16-bitdata

-Supportsallserialclockformatsandsamplingmodes

•I2C™(uptotwomodules):

-SupportsFullMulti-MasterSlavemode

-7-bitand10-bitaddressing

-Buscollisiondetectionandarbitration

-Integratedsignalconditioning

-Slaveaddressmasking

•UART(uptotwomodules):

-Interruptonaddressbitdetect

-InterruptonUARTerror

-Wake-uponStartbitfromSleepmode

-4-characterTXandRXFIFObuffers

-LINbussupport

-IrDA©encodinganddecodinginhardware

-High-SpeedBaudmode

-HardwareFlowControlwithCTSandRTS

•EnhancedCAN(ECAN™module)2.0Bactive:

-Uptoeighttransmitandupto32receivebuffers

-16receivefiltersandthreemasks

-Loopback,ListenOnlyandListenAll

-Messagesmodesfordiagnosticsandbusmonitoring

-Wake-uponCANmessage

-AutomaticprocessingofRemote

TransmissionRequests

-FIFOmodeusingDMA

-DeviceNet™addressingsupport

•QuadratureEncoderInterface(upto2modules):

-PhaseA,PhaseB,andindexpulseinput

-16-bitup/downpositioncounter

-Countdirectionstatus

-PositionMeasurement(x2andx4)mode

-Programmabledigitalnoisefiltersoninputs

-Alternate16-bitTimer/Countermode

-Interruptonpositioncounterrollover/underflow

High-SpeedPWMModuleFeatures:

•UptoninePWMgeneratorswithupto18outputs

•PrimaryandSecondarytime-base

•IndividualtimebaseanddutycycleforeachofthePWMoutput

•Deadtimeforrisingandfallingedges:

-Dutycycleresolutionof1.04ns

-Dead-timeresolutionof1.04ns

•Phaseshiftresolutionof1.04ns

•Frequencyresolutionof1.04ns

•PWMmodessupported:

-StandardEdge-Aligned

-TrueIndependentOutput

-Complementary

-Center-Aligned

-Push-Pull

-Multi-Phase

-VariablePhase

-FixedOff-Time

-CurrentReset

-Current-Limit

•IndependentFault/Current-Limitinputs

•Outputoverridecontrol

•SpecialEventTrigger

•PWMcapturefeature

•Prescalerforinputclock

•DualTriggerfromPWMTOADC

•PWMxL,PWMxHoutputpinswapping

•On-the-FlyPWMFrequency,DutycycleandPhaseShiftchanges

•DisablingofIndividualPWMgenerators

•Leading-EdgeBlanking(LEB)functionality

High-SpeedAnalogComparator:

•UptofourAnalogComparators:

-20nsresponsetime

-10-bitDACforeachanalogcomparator

-DACOUTpintoprovideDACoutput

-Programmableoutputpolarity

-Selectableinputsource

-ADCsampleandconvertcapability

•PWMmoduleinterface:

-PWMDutyCycleControl

-PWMPeriodControl

-PWMFaultDetect

InterruptController:

•5-cyclelatency

•Uptofiveexternalinterrupts

•Sevenprogrammableprioritylevels

•Fiveprocessorexceptions

High-Speed10-bitADC:

•10-bitresolution

•Upto24inputchannelsgroupedinto12conversionpairs

•Twointernalreferencemonitoringinputsgroupedintoapair

•SuccessiveApproximationRegister(SAR)convertersforparallelconversionsofanalogpairs:

-4MspsfordeviceswithtwoSARs

-2MspsfordeviceswithoneSAR

•Dedicatedresultbufferforeachanalogchannel

•Independenttriggersourcesectionforeachanaloginputconversionpairs

PowerManagement:

•On-chip2.5Vvoltageregulator

•Switchbetweenclocksourcesinrealtime

•Idle,Sleep,andDozemodeswith

CMOSFlashTechnology:

•Low-power,high-speedFlashtechnology

•Fullystaticdesign

•3.3V(±10%)operatingvoltage

•IndustrialandExtendedtemperature

•Lowpowerconsumption

SystemManagement:

•Flexibleclockoptions:

-External,crystal,resonator,internalRC

-Phase-LockedLoop(PLL)with120MHzVCO

-PrimaryCrystalOscillator(OSC)intherangeof3MHzto40MHz

-Secondaryoscillator(SOSC)

-InternalLow-PowerRC(LPRC)oscillatoratafrequencyof32.767kHz

-InternalFastRC(FRC)oscillatoratafrequencyof7.37MHz

•Power-onReset(POR)

•Brown-outReset(BOR)

•Power-upTimer(PWRT)

•OscillatorStart-upTimer(OST)

•WatchdogTimerwithitsRCoscillator

•Fail-SafeClockMonitor

•Resetbymultiplesources

•In-CircuitSerialProgramming™(ICSP™)

•ReferenceOscillatorOutput

ApplicationExamples:

•AC-to-DCConverters

•AutomotiveHID

•BatteryChargers

•DC-to-DCConverters

•DigitalLighting

•InductionCooking

•LEDBallast

•RenewablePower/PureSineWaveInverters

•UninterruptiblePowerSupply(UPS)

图1.dsPIC33系列方框图

图2.dsPIC33系列DSP引擎方框图

图3.dsPIC33推荐的最少连接方框图

图4.dsPIC33系列数字PFC方框图

图5.dsPIC33系列升压转换器实现方框图

图6.dsPIC33系列单相同步转换器方框图

图7.dsPIC33系列多相同步降压转换器方框图

图8.dsPIC33系列隔行扫描PFC方框图

图9.dsPIC33系列相移全桥转换器方框图

图10.带PFC和三输出(12V,5V和3.3V)的AC/DC电源电路图

Explorer16低成本高效开发板

TheExplorer16isalowcost,efficientdevelopmentboardtoevaluatethefeaturesandperformanceofMicrochip’snewPIC24Microcontroller,thedsPIC33DigitalSignalController(DSC)families,andthenew32-bitPIC32MXdevices.CoupledwiththeMPLABICD2InCircuitDebuggerorMPLABREALICE,real-timeemulationanddebugfacilitiesspeedevaluationandprototypingofapplicationcircuitry.TheExplorer16100-pinfeaturestwointerchangeablePlug-InModules(PIMs),oneeachforthePIC24FJ128GA010andthedsPIC33FJ256GP710DSC.TheExpl