Claims
- 1. A power management topology for a portable electronic device, comprising:
a portable electronic device comprising a rechargeable battery and a charge controller comprising circuitry generating a feedback signal indicative of battery voltage and/or battery charging current; and an external AC/DC adapter generating a DC source signal from an AC source, said adapter comprising a PWM generator generating a PWM signal and controller, said controller receiving said feedback signal and adjusting the duty cycle of said PWM signal thereby adjusting the voltage and/or current value of said DC source signal.
- 2. A topology as claimed in claim 1, wherein said portable electronic device further comprising a serial data interface and said feedback signal being generated as serial data, and wherein said AC/DC adapter further comprising a serial communications interface for receiving said serial data.
- 3. A topology as claimed in claim 1, wherein said feedback signal is an analog signal.
- 4. A topology as claimed in claim 1, wherein said portable electronic device further comprising modulation circuitry to modulate said feedback signal on top of said DC source signal, and said AC/DC adapter further comprising demodulation circuitry coupled to said DC source signal to demodulate said feedback signal.
- 5. A topology as claimed in claim 1, wherein charge controller further comprising circuitry to generate a feedback signal indicative of power requirements of said portable electronic device and battery charge current.
- 6. An AC/DC adapter, comprising a PWM generator generating a PWM signal, a controller receiving a feedback signal generated by an external portable electronic device, and a DC/DC converter circuit generating a DC source signal, said controller adjusting the duty cycle of said PWM signal based on said feedback signal thereby adjusting the voltage and/or current value of said DC source signal.
Parent Case Info
[0001] The present application claims priority to Provisional Application Serial No. 60/234,442, filed Sep. 21, 2000, and assigned to the same assignee.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60234442 |
Sep 2000 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09960453 |
Sep 2001 |
US |
Child |
10685043 |
Oct 2003 |
US |