Pro.point 10.8V Li-ION Spécifications

LTC176011760f SMBus Charger/Selector for Two Smart Batteries* Voltage and Current Accuracy within 0.2% of ValueReported by Battery Simplifies Construc

LTC1760101760fDCDIV (Pin 16): DCDIV Comparator Input from ExternalResistor Divider Connected from DCIN to GND. If thevoltage at DCDIV pin is above the

LTC1760111760fBLOCK DIAGRA WSHORT CIRCUITSEQUENCER10-BIT ∆ΣCURRENT DACLIMITDECODERPowerPathCONTROLLERSMBusINTERFACECHARGE+–+–––––11-BIT ∆ΣVOLTAGE

LTC1760121760fUUTABLE OF CO TE TS(For Operation Section)1 Overview...

LTC1760131760f1 OverviewThe LTC1760 is composed of an SMBus interface withdual port capability, a sequencer for managing systempower and the charging

LTC1760141760f2.2 Data Bit Definition of Supported SMBus Functions.LTC1760SMBus SMBus Command DataFunction Mode Access Address Code TypeD15 D14 D13 D1

LTC1760151760fLTC1760 SMBus Command DataFunction Mode Access Address Code TypeD15 D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00Current(

LTC1760161760f2.3 Description of Supported SMBus FunctionsThe functions are described as follows:Function Name() (command code)Description:A brief des

LTC1760171760fCHARGE_BAT[4:1]The read only CHARGE_BAT[4:1] nibble is used by theSMBus Host to determine which, if any, battery is beingcharged. All wr

LTC1760181760fOPERATIOUCALIBRATE_REQUEST BitThe read only CALIBRATE_REQUEST bit is set wheneverthe LTC1760 has determined that one or more of theconne

LTC1760191760fBATTERY_SYSTEM_REVISION NibbleThe read only BATTERY_SYSTEM_REVISION nibble re-ports the version of the Smart Battery System Managerspeci

LTC176021760f123456789101112131415161718192021222324TOP VIEWFW PACKAGE48-LEAD PLASTIC TSSOP484746454443424140393837363534333231302928272625SCH2GCH2GCH

LTC1760201760f2.3.7 Current() ('h0a)Description:This function is used by the LTC1760 to read the actualcurrent being supplied through the battery

LTC1760211760fTERMINATE_CHARGE_RESERVED BitThe read only TERMINATE_CHARGE_RESERVED bit isused by the LTC1760 to determine if charging may con-tinue.Al

LTC1760221760f2.5 LTC1760 SMBus Controller OperationSMBus communication with the LTC1760 is handled bythe SMBus Controller, a sub-block of the SMBus I

LTC1760231760fFigure 3. LTC1760 Queries Battery 1 Followed By Battery 2 For Requested Current. (Configuration b)SMBus DUALPORTSCLSDASCL1SDA1SCL2SDA2SM

LTC1760241760f2.6 LTC1760 SMBALERT OperationThe SMBALERT pin allows the LTC1760 to signal to theSMBus Host that there has been a change of status.This

LTC1760251760f6. An SMBus Host write asserts the LTC1760BatterySystemStateCont(CHARGING_INHIBIT) high.7. Hardware controlled charging inhibit is asser

LTC1760261760fThis bit will remain set if a subsequent AlarmWarning()fails to respond. The cached alarm will be cleared by anyof the following conditi

LTC1760271760f4 System Power Management Algorithm and BatteryCalibration4.1 Turning Off System PowerThe LTC1760 allows the user to turn off system pow

LTC1760281760f5 Battery Calibration (Conditioning)Calibration allows the SMBus Host to fully discharge abattery for conditioning purposes. The SMBus H

LTC1760291760f6 MODE Pin OperationThe MODE pin is a multifunction pin that allows theLTC1760 to: 1) display charging status in stand aloneoperation; 2

LTC176031760fELECTRICAL CHARACTERISTICSThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications

LTC1760301760fat hand. The average current control loop converts thevoltage between CSP and BAT to a representative current.Error amp CA2 compares thi

LTC1760311760f8 PowerPath ControllerThe PowerPath switches are turned on and off by thepower management algorithm. The external PFETs areusually conne

LTC1760321760f–+CB1CB2CSN1760 F07EAVREFVSETRVSET7.2kRVF405.3k∆ΣMODULATORSWV11TOITHDACVALUE(11 BITS)Figure 7. Voltage DAC Operation–+1760 F08VREFISETRS

LTC1760331760fCapacity rating will change with age and use and hence thecurrent sharing ratios can change over time.Adapter LimitingAn important featu

LTC1760341760fAs is often the case, the wall adapter will usually have atleast a +10% current limit margin and many times one cansimply set the adapte

LTC1760351760fCA1. Remember the maximum ∆IL occurs at the maxi-mum input voltage. In practice 10µH is the lowest valuerecommended for use.Charger Swit

LTC1760361760fFor thermistors that are IDEAL-RANGE:ISAFETYX = 4/64 • VVCC2/(RXB + RTHX) + 2/64 • VVCC2/(R1A +RTHX)For thermistors that are HOT-RANGE:I

LTC1760371760fis essentially DC. CB2 is the primary filter capacitor andCB1 is used to provide a zero in the response to cancel thepole associated wit

LTC1760381760fThe relatively high ESR of an aluminum electrolytic forC15, located at the AC adapter input terminal, is helpful inreducing ringing duri

LTC1760391760fC/10 or less which is well within the linear operationrange of the MOSFETs.3. Voltage tracking for the discharge process does notneed su

LTC176041760fThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VDCIN =

LTC1760401760fAPPLICATIO S I FOR ATIOWUUUA) Single Battery Configuration.To limit the LTC1760 to a single battery, modify the batteryslot to be el

LTC1760411760fAPPLICATIO S I FOR ATIOWUUU4. Place the output current sense resistor right next to theinductor output but oriented such that the IC

LTC1760421760f3641321637474846451340242529182220333226CB1, 0.1µFCB20.47µFC30.012µFR6100ΩR749.9kR51.21kR412.7kC50.15µFCL20µFC70.1µFR93.3kD4C130.1µF1769

LTC1760431760fPACKAGE DESCRIPTIOUFW Package48-Lead Plastic TSSOP (6.1mm)(Reference LTC DWG # 05-08-1651)FW48 TSSOP 02040.09 – 0.20(.0035 – .008)0° – 8

LTC1760441760fLinear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com© LINEAR

LTC176051760fELECTRICAL CHARACTERISTICSThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications

LTC176061760fELECTRICAL CHARACTERISTICSThe ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications

LTC176071760fTYPICAL PERFOR A CE CHARACTERISTICSUWELECTRICAL CHARACTERISTICSNote 10. Does not include current supplied by VCC to VCC2 (IVCC2_AC1

LTC176081760fTYPICAL PERFOR A CE CHARACTERISTICS UWEfficiency vs Charging CurrentLoad DumpLoad RegulationIOUT (A)00EFFICIENCY (%)10304050100700.02

LTC176091760fCOMP1 (Pin 37): This is the Compensation Node for theAmplifier CL1. A capacitor is required from this pin toGND if input current amplifie