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ST STEVAL-ILL015V1 RGB LED调光解决方案

发布时间:2015-10-05 11:44:36  来源:大电流电感厂家   查看:

ST公司的STEVAL-ILL015V1是采用STP24DP05和STM32™MCU的LED调光演示板,两个STP24DP05可连接16个RGBLED,采用ST1S010的高效开关DC/DC电源,DC电源电压从7.5V到18V,输入电流小于0.7A,LED电流调整.本文介绍了STP24DP05主要特性,典型应用电路图以及STEVAL-ILL015V1LED调光演示电感器厂家板主要特性,电路图和材料清单.

STEVAL-ILL015V1-LEDdimmerdemonstrationboardbasedontheSTP24DP05andSTM32™STP24DP05:24-bitconstantcurrentLEDsinkdriverwithoutputerrordetection

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

The8x3shiftregistersdataflowsequenceordercanbemanagedwithtwodedicatedpins.TheSTP24DP05hasadedicatedpintoactivatetheoutputswithasequentia一体电感ldelay,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


图1.STP24DP05方框图


图2.STP24DP05典型应用电路图

采用STP24DP05LED驱动器和STM32MCU的STEVAL-ILL015V1LED调光演示板

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

STEVAL-ILL015V1LED调光演示板主要特性:

●TwoSTP24DP05(TQFP48)forco扁平型电感nnectionof16RGBLEDs

贴片电感●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.Featuresinc塑封电感器lude:

●LEDdiagnostic

●AdjustablebrightnessandcolorofeachindividualLED

●Animatedtext

●GUI(graphicaluserinterface)softwareforLEDdiagnostics


图3.STEVAL-ILL015V1LED调光演示板外形图


图4.STEVAL-ILL015V1LED调光演示板电路图:MCU,连接器,按钮和USB


图5.STEVAL-ILL015V1LED调光演示板电路图:驱动器,HBLED

材料清单:
平面变压器厂家 | 平面电感厂家

万用表的安全问题万用表是电子测试中必不可少的测试工具,一切电子产品在使用中都有潜在的危险,因此了解其使用的安全性就十分必要。
下面我们来谈一下万用表的安全问题。
首先,了解一下使用万

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