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bq24100,bq24103
bq24105,bq24108
bq24113,bq24115
SLUS606C–JUNE2004–REVISEDSEPTEMBER2005
terminalfunctions(持续)
终端
i/odescription
bq24100,
NAMEbq24103bq24105bq24113bq24115
bq24108
availableonpartswithfixedoutputvoltage.groundorfloatforsingle-cell
cells1313ioperation(4.2v).fortwo-celloperation(8.4v)pullupthispinwitharesistor
toV
CC
.
chargemodeselection:lowforprechargeassetbyiset2pinandhigh(拉
CMODE77I
uptovtsbor<7v)forfastchargeassetbyiset1.
outputvoltageanalogfeedbackadjustment.connecttheoutputofaresistive
FB1313Ivoltagedividerpoweredfromthebatteryterminalstothisnodetoadjustthe
outputbatteryvoltageregulation.
in3,43,43,43,43,4ichargerinputvoltage.
chargercurrentsetpoint1(fastcharge).usearesistortogroundtosetthis
iset188888i/o
值.
chargecurrentsetpoint2(prechargeandtermination),setbyaresistor
connectedtoground.alow-levelcmodesignalselectstheiset2charge
iset299999i/o
比率,butifthebatteryvoltagereachestheregulationsetpoint,bqswitcher
changestovoltageregulationregardlessofcmodeinput.
n/c131919-noconnection.thispinmustbeleftfloatingintheapplication.
11111O
outchargecurrentoutputinductorconnection.
2020202020O
电源-goodstatusoutput(opendrain).thetransistorturnsonwhenavalid
PG55555OV
CC
isdetected.itisturnedoffinthesleepmode.pgcanbeusedtodrivea
ledorcommunicatewithahostprocessor.
pgnd17,1817,1817,1817,1817,18powergroundinput
chargecurrent-senseinput.batterycurrentissensedviathevoltagedrop
SNS1515151515Idevelopedonthispinbyanexternalsenseresistorinserieswiththebattery
包装.a0.1-µfcapacitortopgndisrequired.
chargestatus1(打开-drainoutput).whenthetransistorturnsonindicates
stat122222ochargeinprocess.whenitisoffandwiththeconditionofstat2indicates
variouschargerconditions(看Table1)
chargestatus2(打开-drainoutput).whenthetransistorturnsonindicates
stat2191919ochargeisdone.whenitisoffandwiththeconditionofstat1indicates
variouschargerconditions(看Table1)
temperaturesenseinput.thisinputmonitorsitsvoltageagainstaninternal
ts1212121212ithresholdtodetermineifchargingisallowed.useanntcthermistoranda
voltagedividerpoweredfromvtsbtodevelopthisvoltage.(看Figure7)
timerandterminationcontrol.connectacapacitorfromthisnodetogndto
ttc777isetthebqswitchertimer.whenthisinputislow,thetimerandtermination
detectionaredisabled.
VCC66666IAnalogdeviceinput
VSS1010101010Analoggroundinput
tsinternalbiasregulatorvoltage.connectcapacitor(withavaluebetweena
VTSB1111111111O
0.1-µfand1-µf)betweenthisoutputandvss.
Thereisaninternalelectricalconnectionbetweentheexposedthermalpad
exposedandvss.theexposedthermalpadmustbeconnectedtothesamepotential
thermalpadpadpadpadpadasthevsspinontheprintedcircuitboard.thepowerpadcanbeusedasa
垫子
星
groundconnectionbetweenV
SS
andpgnd.acommongroundplanemay
beused.vsspinmustbeconnectedtogroundatalltimes.
7
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