Texas Instruments BQ24707A Handleiding
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R
SR
Adapter
4.5-24 V
HOST
bq2707x
SYS
Battery
Pack
1S-4S
SMBus
SMBusControlsV&I
withhighaccuracy
AdapterDetection
EnhancedSafety:
OCP,OVP,FETShort
Integration:
LoopCompensation;Soft-Start
Comparator
R
AC
Charge
Controller
PP
Q1Q2
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Folder
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Reference
Design
bq24707
,
bq24707A
SLUSA78C–JULY2010–REVISEDJULY2015
bq24707x1-4CellLi+BatterySMBusChargeControllerWithIndependentComparator
andAdvancedCircuitProtection
1Features3Description
Thebq24707andbq24707Adevicesarehigh-
1
•SMBusHost-ControlledNMOS-NMOS
efficiency,synchronousbatterychargers,offeringlow
SynchronousBuckConverterWithProgrammable
componentcountforspace-constrained,multi-
615kHz,750kHz,and885kHzSwitching
chemistrybatterychargingapplications.
Frequency
SMBuscontrolledinputcurrent,chargecurrent,and
•Real-TimeSystemControlonILIMPintoLimit
chargevoltageDACsallowforveryhighregulation
ChargeCurrent
accuraciesthatcanbeeasilyprogrammedbythe
•EnhancedSafetyFeaturesforOvervoltage
systempowermanagementmicro-controller.
Protection,OvercurrentProtection,Battery,
TheICusestheinternalinputcurrentregisteror
Inductor,andMOSFETShort-CircuitProtection
externalILIMpintothrottledownPWMmodulationto
•ProgrammableInputCurrent,ChargeVoltage,
reducethechargecurrent.
ChargeCurrentLimits
TheICprovidesanIFAULToutputtoalarmifany
–±0.5%ChargeVoltageAccuracyupto19.2V
MOSFETfaultorinputovercurrentoccurs.This
–±3%ChargeCurrentAccuracyupto8.128A
alarmoutputallowsuserstoturnoffinputpower
selectorswhenthefaultoccurs.Meanwhile,an
–±3%InputCurrentAccuracyupto8.064A
independentcomparatorwithinternalreferenceis
–±2%20×AdapterCurrentorChargeCurrent
availabletomonitorinputcurrent,outputcurrent,or
OutputAccuracy
outputvoltage.
•ProgrammableAdapterDetectionandIndicator
TheICchargesone-,two-,three-,orfour-seriesLi+
•IndependentComparatorWithInternalReference
cells,andisavailableina20-pin,3.5×3.5mmQFN
•IntegratedSoft-Start
package.
•IntegratedLoopCompensation
DeviceInformation
(1)
•ACAdapterOperatingRange5Vto24V
PARTNUMBERPACKAGEBODYSIZE(NOM)
•15-µAOff-StateBatteryDischargeCurrent
bq24707
VQFN(20)3.50mm×3.50mm
•20-pin3.5mm×3.5mmQFNPackage
bq24707A
•bq24707:ACOKDelayDefault1.3s
(1)Forallavailablepackages,seetheorderableaddendumat
•bq24707A:ACOKDelayDefault1.2ms
theendofthedatasheet.
2Applications
SimplifiedSchematic
•PortableNotebookComputers,UMPCs,Ultra-Thin
Notebooks,andNetbooks
•PersonalDigitalAssistants
•HandheldTerminals
•IndustrialandMedicalEquipment
•PortableEquipment
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | BQ24707A |
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