Toshiba L635, L630 manual Power Supply

1 Hardware Overview 1.7 Batteries

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 White).

Battery indicator (in White, 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.

20 Satellite/Satellite Pro/L630/L635 Maintenance Manual