參數(shù)資料
型號： LTC4099EPDC#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC20
封裝： 3 X 4 MM, 0.55 MM HEIGHT, LEAD FREE, PLASTIC, UTQFN-20
文件頁數(shù)： 15/36頁
文件大?。?/td> 536K
代理商： LTC4099EPDC#TRPBF
LTC4099
4099fd
downtheSDAlineduringthewriteacknowledgeclock
pulsesothatitisastableLOWduringtheHIGHperiod
ofthisclockpulse.
WhentheLTC4099isreadfrom,itreleasestheSDAline
sothatthemastermayacknowledgereceiptofthedata.
SincetheLTC4099onlytransmitsonebyteofdata,amaster
notacknowledgingthedatasentbytheLTC4099hasno
specificconsequenceontheoperationoftheI2Cport.
However,withoutareadacknowledgefromthemaster,a
pendinginterruptfromtheLTC4099willnotbecleared
andtheIRQpinwillnotbereleased.
Slave Address
TheLTC4099respondstoa7-bitaddresswhichhasbeen
factory programmed to 0b0001001[R/W]. The LSB of
theaddressbyte,knownastheread/writebit,shouldbe
0whenwritingdatatotheLTC4099,and1whenreading
datafromit.Consideringtheaddressan8-bitword,then
thewriteaddressis0x12,andthereadaddressis0x13.
TheLTC4099willacknowledgebothitsreadandwrite
addresses.
Sub-Addressed Writing
TheLTC4099hasthreecommandregistersforcontrol
input. They are accessed by the I2C port via a sub-
addressedwritingsystem.
EachwritecycleoftheLTC4099consistsofexactlythree
bytes.ThefirstbyteisalwaystheLTC4099’swriteaddress.
ThesecondbyterepresentstheLTC4099’ssubaddress.
Thesubaddressisapointerwhichdirectsthesubsequent
databytewithintheLTC4099.Thethirdbyeconsistsof
thedatatobewrittentothelocationpointedtobythe
subaddress.TheLTC4099containscontrolregistersat
onlythreesubaddresslocations:0x00,0x01and0x02.
OnlythetwoLSBsofthesubaddressbytearedecoded,
theremainingbitsaredon’t-cares.Therefore,awriteto
subaddress0x06forexample,iseffectivelyawriteto
subaddress0x02.
Bus Write Operation
The master initiates communication with the LTC4099
withaSTARTconditionandtheLTC4099’swriteaddress.
IftheaddressmatchesthatoftheLTC4099,theLTC4099
returnsanacknowledge.Themastershouldthendeliver
thesubaddress.Again,theLTC4099acknowledgesand
thecycleisrepeatedforthedatabyte.Thedatabyteis
transferredtoaninternalholdinglatchuponthereturnof
itsacknowledgebytheLTC4099.Thisproceduremustbe
repeatedforeachsubaddressthatrequiresnewdata.After
oneormorecyclesof[ADDRESS][SUB-ADDRESS][DATA],
themastermayterminatethecommunicationwithaSTOP
condition.Alternatively,arepeatSTARTconditioncanbe
initiatedbythemasterandanotherchipontheI2Cbuscan
beaddressed.Thiscyclecancontinueindefinitely,andthe
LTC4099willrememberthelastinputofvaliddatathatit
received.Onceallchipsonthebushavebeenaddressed
andsentvaliddata,aglobalSTOPcanbesentandthe
LTC4099willupdateitscommandlatcheswiththedata
thatithadreceived.
Bus Read Operation
ThebusmasterreadsthestatusoftheLTC4099witha
STARTconditionfollowedbytheLTC4099readaddress.If
thereadaddressmatchesthatoftheLTC4099,theLTC4099
returnsanacknowledge.Followingtheacknowledgement
ofitsreadaddress,theLTC4099returnsonebitofstatus
informationforeachofthenexteightclockcycles.ASTOP
commandisnotrequiredforthebusreadoperation.
Input Data
Table1illustratesthethreedatabytesthatmaybewrit-
tentotheLTC4099.Thefirstbyteatsubaddress0x00
controlsthethreeinputcurrentlimitbitsILIM2-ILIM0,the
threebatterychargecurrentcontrolbitsICHARGE2-ICHARGE0
and the two C/x state-of-charge indication control bits
COVERX1andCOVERX0.
Theinputcurrentlimitsettingsaredecodedaccordingto
Table2.Thistableindicatesthemaximumcurrentthatwill
bedrawnfromtheVBUSpinintheeventthattheloadat
VOUT(batterychargerplussystemload)exceedsthepower
available.Anyadditionalpowerwillbedrawnfromthebat-
tery.Thedefaultstatefortheinputcurrentlimitsettingis
000,representingthelowpower100mAUSBsetting.
operaTion
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LTC4099EUDC#PBF 功能描述:IC USB PWR MANAGER/CHRGR 20-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:PowerPath™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LTC4099EUDC#PBF 制造商:Linear Technology 功能描述:IC BATTERY CHARGER 1.2A UTQFN-20
LTC4099EUDC#TRPBF 功能描述:IC USB PWR MANAGER/CHRGR 20-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:PowerPath™ 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件
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