1.9 Power Supply | 1 Hardware Overview |
1.9 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
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, 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.
Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual | 24 |
