Arcam RCUBE - Important Safety Instructions (Continued); Handling Abnormal Conditions; Servicing and Damage; Product Disposal and Compliance

PSUandchargecontinued
thefeedbackgivenbyIC602allowingforintelligentchargingwithchargeenableprovidedfrom
themicroviaM602onthecontrollinelabeledascharge_enablemakingaprovisionfor
extendedcelllife.
Multipleregulatorsareusedtosupplythe(low)voltageareasofthedesigntheseare1.4Astep
downadjustableregulators,REG600receivesa19vsourceatpinonetheoutputvoltageisset
byR601andR640,MosfetM600allowsforthePSUdisablewiththe3Vstandbysupplybeing
tappedofpriortotheswitch.
REG602andREG603operateinasimilarfashionalthoughutilizethechipsownPSUshutdown
controloptionatpin2(SD)undercontrolofmicroU301,amoreconventionalregulator isused
atlocationREG601toprovidethe1.8vcoresupplytoU301.
IC601providesalogicswitched(EN_iPod_PWR)currentlimited+5vsupplytotheiPodtowhilst
alsopreventinganovercurrentsituationattherearpanelUSBinput+3v1thisisreportedto
themainmicroviatheUSB_PWR_FAULTline.
REG604(LDO)providesa3v1supplytotheKleerandR.Fcircuitsandissourcedfromthe+5v
supply.
IC600isachargepumpconvertoronthe+5VApowersupplyrail.
Micro
TheMicroisshownintwohalvesonthediagramshownasIC301(a)detailingportallocation
andIC301(b)detailingpowersupplyrequirementsandprogrammingheaderwithreset
providedbyIC303.
PSUrequirementsinclude3V3STBYandV1.8(internallygeneratedbytheATMEL)
ThebelowtabledetailstheIC301pinallocationsandfunctions
Pin
number
Description Associatedcircuit(s)
6 AMP_TEMP_COM Pin32ofpowerampsandlocationsIC504IC505IC506
7 DC_PWR_PRESENT FromTR600(sheet6)
9 V_IOUT_POT FromIC603viaIC602MAX1873(sheet6)
10 BATT_PWR_PRESENT FromTR603(sheet6)
11 POS_SW SW301RearPanelBassselectswitch
12 DSP_12C_SDA DSPatlocationIC400
13 DSP_12C_SDL DSPatLocationIC400