ML5238手册

FEDL5238-05Issuedate：Jan.22,2014ML523816seriesLi-ionsecondarybatteryprotection,AnalogFrontEndICGENERALDESCRIPTIONTheML5238isanalogfrontendICfor16seriesLithiumIonsecondarybatterypackprotectionsystem.TheML5238providesthefunctionofcellvoltagemonitoring,charge/dischargecurrentmonitoringfunction,anditcandetectover-charge/over-dischargeofeachbatterycellcharge/dischargeover-current.TheML5238hasshortcurrentdetectingfunctionwhichcanturnofftheexternalcharge/dischargeMOS-FETwithoutexternalMCU.FEATURES•16cellhighlyaccuratevoltagemonitoringfunction:outputcellvoltagebyhalffromVMONpin•built-incellbalancingswitchesforeachcell•charge/dischargecurrentmonitoringfunction:SelectvoltagegainofISP-ISMandoutputfromIMONpin.Voltagegainselection:x10/x50•shortcurrentdetectingfunction:detectingthresholdvoltageisselectable,ISP-ISMvoltage=0.1V/0.2V/0.3V/0.4V(typ),thedetectingdelaytimeissetbyexternalcapacitor•externalcharge/dischargeFETcontrol:NMOS-FETdriverbuilt-in•MCUinterface:SPIserialinterface(mode0)•3.3VregulatorforexternalMCUbuilt-in:outputcurrentis10mA(max)•ReferencevoltageregulatorforexternalADC:3.3V(typ),3.28V(min),3.34V(max)@Ta=-10°Cto+60°C•SmallpowerconsumptionNormalstate:50µA(typ),100µA(max)Powersavestate:25µA(typ),50µA(max）Powerdownstate:0.1µA(typ),1µA(max)•powersupplyvoltage:+7Vto+80V•operatingtemperature:-40°Cto+85°C•package:44pinplasticQFP(QFP44-P-910-0.80-2K)Note:TheML5238isforbiddentobeusedforautomotiveoranyequipment,deviceorsystemwhichrequiresanextremelyhighlevelofreliabilityandquality,suchasamedicalinstrument,transportationequipment,aerospacemachinery,nuclear-reactorcontroller,fuel-controllerorothersafetydevice.Ifwhetherproductisintendedtobeusedforanysuchspecialpurposeisdifficulttobedecided,pleasecontactaROHMsalesrepresentativebeforepurchasing.1/30ConfidentialFEDL5238-05ML5238BLOCKDIAGRAMPINCONFIGURATION(TOPVIEW)VDDSWV8V7V6V5V4V3V2V1V0GNDISPCellSelection&CellBalanceSwitchesVoltageRegulatorC_FETVDDPChargerLoadDetectorD_FETPSENSERSENSEVMON/CSSDO/RES/INTOVREGV10V9IMONCellVoltageMonitorMCUI/FControlLogic/PUPINFETDriverCurrentMonitorTESTReferenceGeneratorSCKSDIShortDetectorV14V13V12V11V16V15ISMCDLYVREFVDD4443424140393837363534V7V6V5V4V3V2V1V0GNDISMISPVDDVDD_SWV16V15V14V13V12V11V10V9V81234567891011VREFVMONIMONCDLYNCPSENSERSENSENCC_FETNCD_FET33323130292827262524231213141516171819202122VDDP/PUPINTESTVREG/RES/INTO/CSSCKSDISDOGND2/30ConfidentialFEDL5238-05ML5238PINDESCRIPTIONPinNo.PinnameI/ODescription1VDD−Powersupplyinputpin.ConnectCRfiltersfornoiserejection.2VDD_SW−Powersupplyinputpinforbatteryselectionswitchesandcellbalancingswitched.ConnectthispintoVDDviaresistor.3V16IBatterycell16highvoltageinputpinIfnumberofconnectedcellis5to16,connectthispintoVDD_SWpin.4V15IBatterycell16lowvoltageinputandBatterycell15highvoltageinputpin5V14IBatterycell15lowvoltageinputandBatterycell14highvoltageinputpin6V13IBatterycell14lowvoltageinputandBatterycell13highvoltageinputpin7V12IBatterycell13lowvoltageinputandBatterycell12highvoltageinputpin8V11IBatterycell12lowvoltageinputandBatterycell11highvoltageinputpin9V10IBatterycell11lowvoltageinputandBatterycell10highvoltageinputpin10V9IBatterycell10lowvoltageinputandBatterycell9highvoltageinputpinForthe5cellseriesconnectedbatterypackapplication,connectthispintoGND11V8IBatterycell9lowvoltageinputandBatterycell8highvoltageinputpinForthe5to6cellseriesconnectedbatterypackapplication,connectthispintoGND12V7IBatterycell8lowvoltageinputandBatterycell7highvoltageinputpinForthe5to7cellseriesconnectedbatterypackapplication,connectthispintoGND13V6IBatterycell7lowvoltageinputandBatterycell6highvoltageinputpinForthe5to8cellseriesconnectedbatterypackapplication,connectthispintoGND14V5IBatterycell6lowvoltageinputandBatterycell5highvoltageinputpinForthe5to9cellseriesconnectedbatterypackapplication,connectthispintoGND15V4IBatterycell5lowvoltageinputandBatterycell4highvoltageinputpinForthe5to10cellseriesconnectedbatterypackapplication,connectthispintoGND16V3IBatterycell4lowvoltageinputandBatterycell3highvoltageinputpinForthe5to11cellseriesconnectedbatterypackapplication,connectthispintoGND17V2IBatterycell3lowvoltageinputandBatterycell2highvoltageinputpinForthe5to12cellseriesconnectedbatterypackapplication,connectthispintoGND18V1IBatterycell2lowvoltageinputandBatterycell1highvoltageinputpinForthe5to13cellseriesconnectedbatterypackapplication,connectthispintoGND19V0IBatterycell1lowvoltageinputpinForthe5to14cellseriesconnectedbatterypackapplication,connectthispintoGND20,34GND−Groundpin.21ISMICurrentsensingresistorconnectingpin.Connectthispintothelowvoltageterminalofthelowestlevelbatterycell.22ISPICurrentsensingresistorconnectingpin.ThevoltageofthispinshouldbehigherthantheISMpinindischargingstate.23D_FETODischargingNMOS-FETcontrolsignalpin.ConnectthispintothegatepinoftheexternalNMOSFET.Outputvoltageis14V(typ)forsettingON,outputvoltageis0VforsettingOFF.3/30ConfidentialFEDL5238-05ML5238PinNo.PinnameI/ODescription25C_FETOChargingNMOS-FETcontrolsignaloutputpin.ConnectthispintothegatepinoftheexternalNMOSFET.Outputvoltageis