PWP RHB NT
www.德州仪器.com
FEATURESAPPLICATIONS
描述
延迟
x0
12−bit grayscale
pwm 控制
直流 寄存器
gs 寄存器
直流 可擦可编程只读存储器
常量 电流
驱动器
led 打开 发现
温度
错误 标记
(tef)
最大值 outn
电流
延迟
x1
12−bit grayscale
pwm 控制
直流 寄存器
gs 寄存器
直流 可擦可编程只读存储器
常量 电流
驱动器
led 打开 发现
延迟
x15
6−bit 点
12−bit grayscale
pwm 控制
直流 寄存器
gs 寄存器
直流 可擦可编程只读存储器
常量 电流
驱动器
led 打开 发现
OUT0
OUT1
OUT15
SOUT
SINSCLK
IREF
XERR
XLAT
GSCLK
BLANK
DCPRG
DCPRG
DCPRG
VPRG
VPRG
VPRG
GNDVCC
VPRG
输入
变换
寄存器
输入
变换
寄存器
VPRG
110
2312
191180
9590
116
5
VPRG
0
0
95
96
191
led 打开
发现
(lod)
5
9590
6 11
DCPRG
0
192
96
0
1
01 0
1
01
gs 计数器
CNT
CNT
CNT
CNT
96
96
状态
信息:
lod,
ted,
直流 数据
192
0
191
1
0
0
1
V
REF
=1.24 v
纠正
6−bit 点
纠正
6−bit 点
纠正
01
Blank
TLC5940
SLVS515A–DECEMBER2004–REVISEDAUGUST2005
16CHANNELLEDDRIVERWITHDOTCORRECTIONANDGRAYSCALEPWMCONTROL
•
monocolor,multicolor,fullcolorleddisplays
•
16Channels
•
LEDSignboards
•
12bit(4096steps)grayscalepwmcontrol
•
DisplayBacklighting
•
DotCorrection
•
一般,高-currentleddrive
–6bit(64steps)
–StorableinIntegratedEEPROM
•
drivecapability(constantcurrentsink)
thetlc5940isa16-channelconstant-currentsink
–0mato60ma(v
CC
<3.6v)
leddriver.eachchannelhasanindividuallyadjust-
–0mato120ma(v
CC
>3.6v)
able4096-stepgrayscalepwmbrightnesscontrol
anda64-stepconstant-currentsink(dotcorrection).
•
LEDPowerSupplyVoltageupto17V
Thedotcorrectionadjuststhebrightnessvariations
•
V
CC
=3vto5.5v
betweenledchannelsandotherleddrivers.这
•
serialdatainterface,spicomp.
dotcorrectiondataisstoredinanintegrated
可擦可编程只读存储器.bothgrayscalecontrolanddotcorrection
•
controlledin-rushcurrent
areaccessibleviaaserialinterface.asingleexternal
•
30-mhzdatatransferrate
resistorsetsthemaximumcurrentvalueofall16
•
cmosleveli/o
途径.
•
ErrorInformation
thetlc5940featurestwoerrorinformationcircuits.
–lod:ledopendetection
theledopendetection(lod)indicatesabrokenor
disconnectedledatanoutputterminal.thethermal
–tef:thermalerrorflag
errorflag(tef)indicatesanovertemperaturecon-
dition.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2004–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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