dynabook Satellite Pro L50-G - Power Supply; Powersupply

1.5 Power Supply 1 Hardware Overview
Satellite Pro L50-G / DynabookP* -C*
MaintenanceManual 17
1.5 Power Supply
The power supply unit provides many different voltages for the systemboard and performs the
following functions:
1. Powerinput monitor
Checkswhether the DC power supply (AC adapter) is connectedto the computer.
Checkswhether 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 andoff the battery pack charging power supply.
Issuesa 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 systemblock (load/logic circuit side).
Controls forced shutdown if the power supply malfunctions.
3. Logic circuit control
Instructs the gatearray to enable/disable tuning the power on.
Controls power-on/off operation.
4. Statusdisplay
Turns on the Power.
Battery indicator (in White or Amber or Amber Blink).
5. External interface
Performscommunication through the I2C bus (via the internal EC/KBC).
Transfers the power supply operation mode.
6. Output monitor
Monitors the voltage output to the systemblock (load/logic circuit side).
Monitors the voltage, over voltage, input/output current of the battery pack.
Monitors the internal temperatureof the battery pack.
Monitors the supply voltage from the AC adapter.