1 Hardware Overview | Error! Style not defined. Error! Style not defined. |
1.4Power 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
4.Status display
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.
Satellite L450/Pro L450/L450D/Pro L450D Maintenance Manual |
