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

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

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