Toshiba L500D manual PowerSupply

Error!￿Use￿the￿Home￿tab￿to￿apply￿￿￿￿2￿to￿the￿text￿that￿you￿want￿to￿appear￿here.￿Error!￿Use￿the￿

Home￿tab￿to￿apply￿￿￿￿2￿to￿the￿text￿that￿you￿want￿to￿appear￿here.￿1￿HARDWARE￿OVERVIEW￿

1.4￿ Power￿Supply￿

The￿power￿supply￿unit￿provides￿constant￿voltage￿(19V)￿for￿the￿system￿board￿and￿performs￿the￿ following￿functions:￿

1.￿ Power￿input￿monitor￿

￿￿ Checks￿whether￿the￿AC￿adapter￿(DC￿power￿supply)￿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).￿

￿￿ Battery￿indicator￿(in￿Green￿or￿Amber).￿

￿￿ DC-IN￿indicator￿(in￿Green)￿￿

5.￿ External￿interface￿

￿￿ Performs￿communication￿through￿the￿I2C￿bus￿(via￿the￿internal￿EC/KBC).￿

￿￿ Transfers￿the￿power￿supply￿operation￿mode.￿

SATELLITE￿L500D￿MAINTENANCE￿MANUAL￿ 1-15￿