ST公司的STEVAL-ILL015V1是采用STP24DP05和STM32™MCU的LED調光演示板,兩個STP24DP05可連接16個RGBLED,采用ST1S010的高效開關DC/DC電源,DC電源電壓從7.5V到18V,輸入電流小于0.7A,LED電流調整.本文介紹了STP24DP05主要特性，典型應用電路圖以及STEVAL-ILL015V1LED調光演示板主要特性，電路圖和材料清單．

STEVAL-ILL015V1-LEDdimmerdemonstrationboardbasedontheSTP24DP05andSTM32™STP24DP05:24-bitconstantcurrentLEDsinkdriverwithoutputerrordetection

TheSTP24DP05isamonolithic,lowvoltage,lowcurrentpower24-bitshiftregisterdesignedforLEDpanELdisplays.Thedevicecontainsa8x3-bitserial-in,parallel-outshiftregisterthatfeedsa8x3-bitD-typestorageregister.Intheoutputstage,twenty-fourregulatedcurrentsourcesweredesignedtoprovide5-80mAconstantcurrenttodrivetheLEDs.

The8x3shiftregistersdataflowsequenceordercanbemanagedwithtwodedicatedpins.TheSTP24DP05hasadedicatedpintoactivatetheoutputswithasequentialdelay,thatwillpreventinrushcurrentduringoutputsturn-ON.

Thedevicedetectioncircuitchecks3differentconditionsthatcanoccurontheoutputline:shorttoGND,shorttoVOoropenline.

Thedatadetectionresultsareloadedintheshiftregistersandshiftedoutviatheseriallineoutput.Thedetectionfunctionalityisactivatedwithadedicatedpinorasalternative,throughalogicsequencethatallowstheusertoenterorexitfromdetectionmode.

Throughthreeexternalresistors,userscanadjusttheoutputcurrentforeach8-channelgroup,controllinginthiswaythelightintensityofLEDs.

TheSTP24DP05guaranteesa20Voutputdrivingcapability,allowinguserstoconnectmoreLEDsinseries.

Thehighclockfrequency,25MHz,makesthedevicesuitableforhighdataratetransmission.The3.3Vofvoltagesupplyisusefulforapplicationsthatinterfaceanymicrofrom3.3V.

STP24DP05主要特性:

■Lowvoltagepowersupplydownto3V

■8x3constantcurrentoutputchannels

■Adjustableoutputcurrentthroughexternalresistors

■Shortandopenoutputerrordetection

■SerialdataIN/paralleldataOUT

■Shiftregisterdataflowregisterscontrol

■Accepts3.3Vand5Vmicrodriver

■Outputcurrent:5-80mA

■25MHzclockfrequency

■Highthermalefficiencypackage

采用STP24DP05LED驅動器和STM32MCU的STEVAL-ILL015V1LED調光演示板

ThisusermanualprovidesinstructionsforusingtheSTEVAL-ILL015V1LEDdimmerdemonstrationboardbasedontheSTP24DP05LEDdriverandtheSTM32™microcontrolleracceleratedbySPIandDMA.Thisdocumentprovidesinformationincludinghardwaresetup,descriptionofdemonstrationfirmwarefunctionality,PCinterconnectionoptionsandevaluationoftheSTP24DP05LEDdriver.

STEVAL-ILL015V1LED調光演示板主要特性:

●TwoSTP24DP05(TQFP48)forconnectionof16RGBLEDs

●16RGBhigh-brightnessLEDs

●STM32microcontrollerusinginternalHSoscillator

●High-efficiencyswitchingDC-DCpowersupplyusingtheST1S010

●DCpowersupply7.5-18V(undifferentiatedpolarity,overvoltageprotection)

●DCinputcurrent0.7Amax.,standardsupplyconnector

●LEDcurrentregulation

●Controlledby3buttons,aknobandareset/backbutton

●Availabletestpointforeachimportantsignal

●JTAGinterfaceformicrocontrollerfirmwarechange/update

●ErrorandovertemperatureLEDsforeachLEDdriver.

●3jumpersallowingdisconnectionof3LEDsfromthedriverfortestingtheerror

detectionmode

●3jumpersallowingshortingof3LEDsfromthedriverfortestingtheerrordetection

Mode

●MiniUSBconnectorforPCinterconnection

Theboardisdistributedwithfirmwarewhichenablesstandaloneandnonstandalone

demonstration.Featuresinclude:

●LEDdiagnostic

●AdjustablebrightnessandcolorofeachindividualLED

●Animatedtext

●GUI(graphicaluserinterface)softwareforLEDdiagnostics

材料清單:

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