Energy conserving (stand-by mode) power saving design for battery chargers and power supplies with a control signal
A system is described that turns off a high power, power supply when a device no longer needs high power. A low power, power supply or a rechargeable battery provides power to determine when the device again needs high power. The low power supply consumes a minimum possible power when the device does not need high power and the power rechargeable battery is not charged. That is, the high power and low power, power supplies are turned on or off based on the real time power consumption need of the device and the charged state of the battery. The power need of the device is monitored by a current shunt monitoring circuit and a control signal monitoring circuit.
1. A memory device having instructions stored thereon that, in response to execution by a control device, cause the control device to perform operations comprising:
recharging a battery during a high-power mode of operation associated with an electronic device, wherein the battery is recharged by an AC to DC power supply configured to provide power to the electronic device;
determining when the battery is recharged;
receiving a control signal indicating that the power consumed by the electronic device is zero; and
in response to receiving the control signal, turning off the AC to DC power supply during a power-off mode of operation.
2. The memory device of claim 1 , wherein the operations further comprise:
monitoring a power requirement of the electronic device; and
causing a second power source to provide power for monitoring the electronic device, wherein the second power source is associated with a low-power mode of operation of the electronic device.
3. The memory device of claim 2 , wherein the second power source comprises the battery.
4. The memory device of claim 2 , wherein the second power source is caused to provide the power for monitoring the power requirement during the high-power mode of operation, and wherein the second power supply is turned off during the power-off mode of operation.
5. The memory device of claim 2 , wherein the second power source is caused to provide the power for monitoring the power requirement during the power-off mode of operation.
6. The memory device of claim 5 , wherein the operations further comprise:
identifying a change to the power requirement during the power-off mode of operation; and
turning on the AC to DC power supply in response to identifying the change to the power requirement.
7. An apparatus, comprising:
means for recharging a battery during a high-power mode of operation associated with an electronic device, wherein the electronic device is powered by an AC to DC power supply;
means for determining when the battery is recharged;
means for receiving a control signal indicating that the power consumed by the electronic device is zero; and
means for turning off the AC to DC power supply during a power-off mode of operation in response to receiving the control signal.
8. The apparatus of claim 7 , wherein the AC to DC power supply is configured to recharge the battery.
9. The apparatus of claim 7 , further comprising means for monitoring a power requirement of the electronic device, wherein the control signal is received from the means for monitoring.
10. The apparatus of claim 9 , wherein the means for monitoring is powered by the battery.
11. The apparatus of claim 7 , wherein the control signal is received in response to the electronic device being turned off or disconnected from the AC to DC power supply.
12. The apparatus of claim 7 , wherein the means for receiving comprises means for receiving a second control signal indicating that the electronic device has been turned on, and wherein the means for turning off the AC to DC power supply comprises means for turning on the AC to DC power supply in response to receiving the second control signal.
13. The apparatus of claim 12 , wherein the control signal is received during the high-power mode of operation, and wherein the second control signal is received during a power-on mode of operation.
14. An apparatus, comprising:
a monitoring circuit configured to monitor a state of charge of a battery during a high-power mode of operation associated with an electronic device, wherein an AC to DC power supply is configured to provide power to the electronic device; and
a control circuit configured to:
receive a control signal indicating that the power consumed by the electronic device is zero; and
turn off the AC to DC power supply during a power-off mode of operation, in response to receiving the control signal.
15. The apparatus of claim 14 , wherein the monitoring circuit is powered by the battery.
16. The apparatus of claim 14 , wherein the control device is further configured to:
receive a second control signal indicating that the electronic device has been turned on; and
turn on the AC to DC power supply in response to receiving the second control signal.
17. The apparatus of claim 16 , wherein the control signal is received during the high-power mode of operation, and wherein the second control signal is received during the power-off mode of operation.
18. The apparatus of claim 14 , wherein the control signal is received from the monitoring circuit.
19. The apparatus of claim 14 , wherein the control signal is received in response to the electronic device being turned off or disconnected from the AC to DC power supply.
20. The apparatus of claim 14 , wherein the control signal is received during the power-off mode of operation.