Toshiba SATEGO L300D Laptop User Manual


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1HardwareOverview 1.6PowerSupply
20 SatelliteL300D/L305D/SatelliteProL300D/EQUIUML300D/SATEGOL300DMaintenanceManual
1.6PowerSupply
Thepowersupplyunitprovidesmanydifferentvoltagesforthesystemboardandperformsthe
followingfunctions:
1. Powerinputmonitor
CheckswhethertheDCpowersupply(ACadapter)isconnectedtothecomputer.
Checkswhetherthebatterypackisconnectedtothecomputer.
MonitorstheDCpowersupplyinputvoltage(ACAdapteroutputvoltage).
2. Powersupply'sinternalcontrol
Turnsonandoffthebatterypackchargingpowersupply.
IssuesachargingcurrentinstructiontothePWMcontrolICofthebatterypackcharging
powersupply.
ControlsthesupplyofDCpowersupplyinput(ACAdapteroutput)tothepowersupply
unit.
Controlsthesupplyofpowertothesystemblock(load/logiccircuitside).
Controlsforcedshutdownifthepowersupplymalfunctions.
3. Logiccircuitcontrol
Instructsthegatearraytoenable/disabletuningthepoweron.
Controlspower-on/offoperation.
4. Statusdisplay
TurnsonthePowerLED(inGreenorAMBER).
Batteryindicator(inGreenorAMBERorAMBERFlash).
5. Externalinterface
PerformscommunicationthroughtheI2Cbus(viatheinternalEC/KBC).
Transfersthepowersupplyoperationmode.
6. Outputmonitor
Monitorsthevoltageoutputtothesystemblock(load/logiccircuitside).
Monitorsthevoltage,overvoltage,input/outputcurrentofthebatterypack.
Monitorstheinternaltemperatureofthebatterypack.
MonitorsthesupplyvoltagefromtheACadapter.
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