Power supply management controller integrated circuit, power management circuit for electrically powered systems, and method of managing power to such systems

摘要

A power supply management controller integrated circuit for managing power supply to system units of a system, comprising power supply means for powering the system units, a power supply control unit for controlling the powering, a wake-up timer unit, and means for acknowledging an active or passive state of the system, wherein the power supply control unit is arranged for cooperating with the means for acknowledging the state of the system for enabling the power supply control unit to cease powering of the system units for de-activation of the system during the passive state of the system, and for enabling the power supply control unit to maintain powering during an active state of the system, and wherein the power supply control unit is arranged for cooperating with the wake-up timer unit for periodically powering the system units during the passive state of the system for enabling activation of the system.

主权项

1. Power supply management controller integrated circuit for managing power supply to one or more system units of a system, said integrated circuit comprising power supply means for powering said system units, a power supply control unit for controlling said powering of said system units, a wake-up timer unit, a clock unit for providing a clock signal for said wake-up timer unit and means for acknowledging an active or passive state of said system,
wherein said power supply control unit is arranged for cooperating with said means for acknowledging said state of said system for enabling said power supply control unit to cease powering of said system units for de-activation of said system during said passive state of said system, and for enabling said power supply control unit to maintain powering of said system units during an active state of said system, wherein said power supply control unit is arranged for cooperating with said wake-up timer unit for periodically powering said system units during said passive state of said system for enabling activation of said system, and wherein said clock unit is operatively connected to a controlled oscillator, and wherein said oscillator comprises tuning means arranged for periodically tuning said controlled oscillator according to a duty cycle, and wherein said tuning means are also arranged for adapting said tuning duty cycle dependent on a tuning signal which is indicative of an environmental parameter, such that said tuning is performed periodically according to a variable tuning duty cycle, wherein the tuning duty cycle is made dependent on environmental parameters.