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1 Hardware Overview 1.9 Power Supply
1.7 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).
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, overvoltage, input/output current of the battery pack.
•
Monitors the internal temperature of the battery pack.
•
Monitors the supply voltage from the AC adapter.
1-18 Satellite A60/ Pro A60 Maintenance Manual