초록 ▼

A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the porta

A power management topology for portable electronic devices that includes a feed-enabled AC/DC adapter that receives feedback data from a charge controller associated with the portable device. The feedback data can include battery charging current, battery voltage, or power requirements of the portable device. Using the feedback data, the external AC/DC adapter can adjust the DC output to meet the charging requirement of the battery and/or the power requirements of the portable device.

대표청구항 ▼

What is claimed is: 1. An adapter for providing an output DC signal, said adapter comprising: a PWM generator and a DC to DC converter, said. PWM generator generating a PWM signal in response to receipt of an analog feedback signal from one of a plurality of error amplifiers of a charge controller

What is claimed is: 1. An adapter for providing an output DC signal, said adapter comprising: a PWM generator and a DC to DC converter, said. PWM generator generating a PWM signal in response to receipt of an analog feedback signal from one of a plurality of error amplifiers of a charge controller of an external device, said analog feedback signal representative of a power condition of said external device, said DC to DC converter configured to receive said PWM signal and adjust said output DC signal in response to said PWM signal. 2. The adapter of claim 1, wherein said PWM generator adjusts a duty cycle of said PWM signal in response to said analog feedback signal. 3. The adapter of claim 1, wherein said power condition of said external device is a power condition of a battery of said external device. 4. The adapter of claim 3, wherein said power condition of said battery is a battery voltage level. 5. The adapter of claim 3, wherein said power condition of said battery is a battery charging current level. 6. The adapter of claim 1, wherein said power condition of said external device is a power requirement of at least one active system of said external device. 7. An electronic device comprising: a charge controller comprising a plurality of error amplifiers, each one of said plurality of error amplifiers capable of generating an analog feedback signal feedback signal representative of a power condition of said electronic device, wherein an adapter comprises a PWM generator generating a PWM signal in response to receipt of any one of said analog feedback signal to adjust an output DC signal from said adapter. 8. The electronic device of claim 7, further comprising a rechargeable battery and wherein said charge controller provides said output DC signal from said adapter to said rechargeable battery in a battery charging supply mode. 9. The electronic device of claim 7, wherein said power condition of said external device is a power condition of a rechargeable battery of said external device. 10. The electronic device of claim 9, wherein said power condition of said rechargeable battery is a battery voltage level. 11. The electronic device of claim 9, wherein said power condition of said rechargeable battery is a battery charging current level. 12. The electronic device of claim 7, wherein said power condition of said external device is a power requirement of at least one active system of of said electronic device. 13. A method of adjusting of DC power signal from an adapter, said method comprising: monitoring a power condition of an external device coupled to said adapter; providing an analog feedback signal from one of a plurality of error amplifiers of a charge controller of said external device to said adapter representative of said power condition of said external device; adjusting a PWM signal generated by said adapter in response to said analog feedback signal received by said adapter; and adjusting said DC power signal provided by said adapter in response to said PWM signal. 14. The method of claim 13, wherein said power condition of said external device is a power condition of a rechargeable battery of said external device. 15. The method of claim 14, wherein said power condition of said rechargeable battery is a battery voltage level. 16. The method of claim 14, wherein said power condition of said rechargeable battery is a battery charging current level. 17. The method of claim 13, wherein said power condition of said external device is a power requirement of a t least one active system of said external device.