Microchip dsPIC33FJ PSFB砖形DCDC转换器参考设计.docx

Microchip dsPIC33FJ PSFB砖形DCDC转换器参考设计.docx

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MicrochipdsPIC33FJPSFB砖形DCDC转换器参考设计

MicrochipdsPIC33FJPSFB砖形DC-DC转换器参考设计

关键词：

电源管理,DC/DC转换器

Microchip公司的dsPIC33FJ06GS101/X02和dsPIC33FJ16GSX02/X04包括有广泛的DSP功能和高性能16位MCU架构。

3.0-3.6V的性能达到40MIPS，具有16位宽的数据通路，24位宽指令，广泛应用在AC/DC转换器，汽车HID，电池充电器，DC/DC转换器，数字照明，电磁炉，可再生能源/纯正弦波逆变器和UPS。

本文介绍了dsPIC33FJ系列主要特性，方框图和CPU核方框图，DSP引擎方框图，数字PFC框图以及多种应用框图。

此外还介绍了相移全桥（PSFB）1/4砖形DC-DC转换器参考设计主要特性和指标，详细电路图与材料清单（BOM）。

dsPIC33FJ06GS101/X02anddsPIC33FJ16GSX02/X04devicescontainextensiveDigitalSignalProcessor（DSP）functionalitywithahigh-performance,16-bitmicrocontroller（MCU）architecture.

dsPIC33FJ系列主要特性：

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

DigitalI/O:

•PeripheralPinSelectFunctionality

•Upto35ProgrammableDigitalI/OPins

•Wake-up/Interrupt-on-Changeforupto30Pins

•OutputPinscanDriveVoltagefrom3.0Vto3.6V

•Upto5VOutputwithOpen-DrainConfiguration

•5VTolerantDigitalInputPins（exceptRB5）

•16mASource/SinkonAllPWMpins

On-ChipFlashandSRAM:

•FlashProgramMemory（upto16Kbytes）

•DataSRAM（upto2Kbytes）

•BootandGeneralSecurityforProgramFlash

PeripheralFeatures:

•Timer/Counters,uptoThree16-BitTimers:

-Canpairuptomakeone32-bittimer

•InputCapture（uptotwochannels）:

-Captureonup,downorbothedges

-16-bitcaptureinputfunctions

-4-deepFIFOoneachcapture

•OutputCompare（uptotwochannels）:

-SingleorDual16-BitComparemode

-16-BitGlitchlessPWMmode

•4-WireSPI:

-FramingsupportsI/Ointerfacetosimplecodecs

-1-deepFIFOBuffer.

-Supports8-bitand16-bitdata

-Supportsallserialclockformatsandsamplingmodes

•I2C™:

-SupportsFullMulti-MasterSlavemode

-7-bitand10-bitaddressing

-Buscollisiondetectionandarbitration

-Integratedsignalconditioning

-Slaveaddressmasking

•UART:

-Interruptonaddressbitdetect

-InterruptonUARTerror

-Wake-uponStartbitfromSleepmode

-4-characterTXandRXFIFObuffers

-LINbussupport

-IrDA®encodinganddecodinginhardware

-High-SpeedBaudmode

-HardwareFlowControlwithCTSandRTS

InterruptController:

•5-CycleLatency

•Upto35AvailableInterruptSources

•UptoThreeExternalInterrupts

•SevenProgrammablePriorityLevels

•FourProcessorExceptions

High-SpeedPWMModuleFeatures:

•UptoFourPWMGeneratorswithFourtoEightOutputs

•IndividualTimeBaseandDutyCycleforeachoftheEightPWMOutputs

•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-LimitInputsfor8PWMOutputs

•OutputOverrideControl

•SpecialEventTrigger

•PWMCaptureFeature

•PrescalerforInputClock

•DualTriggerfromPWMtoADC

•PWMxL,PWMxHOutputPinSwapping

•PWM4H,PWM4LPinsRemappable

•On-the-FlyPWMFrequency,DutyCycleandPhaseShiftChanges

•DisablingofIndividualPWMGenerators

•Leading-EdgeBlanking（LEB）Functionality

High-SpeedAnalogComparator

•UptoFourAnalogComparators:

-20nsresponsetime

-10-bitDACforeachanalogcomparator

-DACOUTpintoprovideDACoutput

-Programmableoutputpolarity

-Selectableinputsource

-ADCsampleandconvertcapability

•PWMModuleInterface:

-PWMdutycyclecontrol

-PWMperiodcontrol

-PWMFaultdetect

High-Speed10-BitADC

•10-BitResolution

•Upto12InputChannelsGroupedintoSixConversionPairs

•TwoInternalReferenceMonitoringInputsGroupedintoaPair

•SuccessiveApproximationRegister（SAR）

ConvertersforParallelConversionsofAnalogPairs:

-4MspsfordeviceswithtwoSARs

-2MspsfordeviceswithoneSAR

•DedicatedResultBufferforeachAnalogChannel

•IndependentTriggerSourceSectionforeachAnalogInputConversionPair

PowerManagement:

•On-Chip2.5VVoltageRegulator

•SwitchbetweenClockSourcesinRealTime

•Idle,Sleep,andDozemodeswithFastWake-up

CMOSFlashTechnology:

•Low-Power,High-SpeedFlashTechnology

•FullyStaticDesign

•3.3V（±10%）OperatingVoltage

•IndustrialandExtendedTemperature

•Low-PowerConsumption

SystemManagement:

•FlexibleClockOptions:

-External,crystal,resonator,internalRC

-Phase-LockedLoop（PLL）with120MHzVCO

-PrimaryCrystalOscillator（OSC）intherangeof3MHzto40MHz

-InternalLow-PowerRC（LPRC）oscillatoratafrequencyof32kHz

-InternalFastRC（FRC）oscillatoratafrequencyof7.37MHz

•Power-onReset（POR）

•Brown-outReset（BOR）

•Power-upTimer（PWRT）

•OscillatorStart-upTimer（OST）

•WatchdogTimerwithitsRCOscillator

•Fail-SafeClockMonitor（FSCM）

•ResetbyMultipleSources

•In-CircuitSerialProgramming™（ICSP™）

•ReferenceOscillatorOutput

dsPIC33FJ系列应用：

•AC-to-DCConverters

•AutomotiveHID

•BatteryChargers

•DC-to-DCConverters

•DigitalLighting

•InductionCooking

•LEDBallast

•RenewablePower/PureSineWaveInverters

•UninterruptiblePowerSupply（UPS）

图1。

dsPIC33FJ06GS101/X02和dsPIC33FJ16GSX02/X04方框图

图2。

dsPIC33FJ06GS101/X02和dsPIC33FJ16GSX02/X04CPU核方框图

图3。

DSP引擎方框图

图4。

dsPIC33FJ数字PFC框图

图5。

dsPIC33FJ升压转换器框图

图6。

dsPIC33FJ单相同步降压转换器框图

图7。

dsPIC33FJ多相同步降压转换器框图

图8。

dsPIC33FJ离线UPS框图

图9。

dsPIC33FJ交叉PFC框图

图10。

dsPIC33FJ相移全桥（PSFB）转换器框图

图11。

带PFC三输出（12V,5V和3.3V）AC/DC电源框图

1/4砖形DC/DC转换器参考设计

QuarterBrickDC/DCConverterReferenceDesign

Thisreferencedesignprovidesaneasymethodtoevaluatethepower,andfeaturesofSMPSdsPIC®DigitalSignalControllersinhighdensityquarterbrickDC-DCconvertersforintermediatebusarchitectures（IBA）.ThisreferencedesignisimplementedusingasingledsPIC33F“GS”digital-powerDSCsfromMicrochipthatprovidesthefulldigitalcontrolofthepowerconversionandsystemmanagementfunctions.AsshowninthisreferencedesignthedsPIC33F‘GS’devicesenabledesignerstoeasilyandcosteffectivelycreateproductsusingadvancedswitchingtechniquessuchasPhaseShiftFullBridge（PSFB）topologythatlowerswitchinglossesandenableefficienciesashighas94%.TheQuarterbrickDC/DCConverterReferenceDesignisroyaltyfreewhenusedinaccordancewiththelicensingagreement. 

Thisreferencedesignworkswithtelecominputrange36V–76VDCandprovides12Vwith200Wpower.Designedwithplanarmagnetics,thisreferencedesignimplementsvariousnon-lineartechniques,whichimprovestheperformanceandefficiency.

1/4砖形DC/DC转换器参考设计主要特性：

PrimaryandSecondaryMOSFETcontrol 

ActiveCurrentShare 

RemoteON/OFF 

Programmablesoftstart 

ControlledFalltime 

Voltage,Current,Temperaturemonitoring&Protection 

Configurableoutputvoltage 

FullDigitalControl

1/4砖形DC/DC转换器参考设计指标：

IndustrystandardQuarter-brick（36.8x58.4x11.4mm） 

Wideinputrange36V-76V 

OutputVoltage:

12V 

OutputCurrent:

17A 

OutputPower:

200W 

Efficiencygreaterthan93% 

1500Vdcinputtooutputisolation 

图12。

1/4砖形DC/DC转换器参考设计外形图

图13。

1/4砖形DC/DC转换器的dsPIC®DSC资源图

图14。

PSFB1/4砖形DC/DC转换器电路图

（1）

图15。

PSFB1/4砖形DC/DC转换器电路图

（2）

图16。

PSFB1/4砖形DC/DC转换器电路图（3）

图17。

PSFB1/4砖形DC/DC转换器电路图（4）

AO-Electronics傲壹电子官网：

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图18。

基板电路图