1. A system for controlling the power dissipated by a device when charging a battery in said device comprising:
one or more circuits operable for, at least:
first determining a first value of a current, said first value based on a maximum power capable of being dissipated by said device, said device powered by said battery;
second determining the minimum of said first value and a second value, wherein said first value is a function of time, said first value computed by dividing said maximum power by a difference between a first voltage measured at the supply terminal of a charging device and a second voltage taken at the input terminal of said battery; and
receiving a current for charging said battery using said minimum, said charging device performing said charging.
2. The system of claim 1 wherein said maximum power equals a maximum power tolerated by said device.
3. The system of claim 1 wherein said second value equals the maximum value of current found within a constant current phase of a typical charge cycle of said device.
4. The system of claim 1 wherein said second value equals the maximum current attained while charging said battery using said charging device.
5. The system of claim 1 wherein said maximum power is specified by a manufacturer of said device.
6. The system of claim 1 wherein said device comprises a wireless headset.
7. The system of claim 1 wherein said second value and a value of said maximum power are stored in a memory within said device.
8. The system of claim 1 wherein said battery comprises a lithium polymer battery.
9. The system of claim 1 wherein said battery comprises a lithium-ion battery.
10. A system for controlling the power dissipated by a device when charging a battery in said device comprising:
one or more circuits operable for, at least:
computing a difference between a first voltage and a second voltage, said first voltage generated by a charger for charging said device, said second voltage corresponding to the voltage across said battery; said charger providing current to charge said battery; and
generating a controlled battery current, wherein said controlled battery current is equal to a minimum of a first value and a second value, said first value equal to the maximum value of current during a typical charge cycle of said battery divided by said difference, said second value equal to a maximum power dissipation tolerated by said device.
11. The system of claim 10 wherein said maximum power dissipation tolerated by said device is specified by a manufacturer of said device.
12. The system of claim 10 wherein said device comprises a wireless headset.
13. The system of claim 10 wherein said second value and value of said maximum power dissipation are stored in a memory of said device.
14. The system of claim 10 wherein said battery comprises a lithium polymer battery.
15. The system of claim 10 wherein said battery comprises a lithium-ion battery.
16. A method of controlling the power dissipated by a device when charging a battery in said device comprising:
first monitoring a first voltage output by a charger used for said charging said battery;
second monitoring a second voltage at said battery;
first determining a first current based on a power dissipation value associated with said device, said first voltage, and said second voltage;
second determining a minimum of said first current and a second current, wherein said second current equals the maximum charging current during a typical charge cycle of said device; and
applying a control signal to a control circuit to generate said minimum, said control circuit communicatively coupled to:
said charger at a first port, and
said battery at a second port.
17. The method of claim 16 wherein said device comprises a wireless headset.
18. The method of claim 16 wherein said battery comprises a lithium battery.
19. A system for controlling the power dissipated by a device when charging a battery in said device comprising:
one or more circuits operable for, at least:
first monitoring a first voltage output by a charger used for said charging said battery;
second monitoring a second voltage at said battery;
first determining a first current based on a power dissipation value associated with said device, said first voltage, and said second voltage;
second determining a minimum of said first current and a second current, wherein said second current equals the maximum charging current during a typical charge cycle of said device; and
applying a control signal to a control circuit of said one or more circuits to generate said minimum, said control circuit communicatively coupled to:
said charger at a first port, and
said battery at a second port.
20. The system of claim 19 wherein said device comprises a wireless headset.
21. The system of claim 19 wherein said battery comprises a lithium battery.
22. A method of controlling the power dissipated by a device when charging a battery in said device comprising:
monitoring the battery voltage of said battery;
first determining a first current based on a power dissipation value associated with said device, said battery voltage, and an estimated voltage;
second determining a minimum of said first current and a second current, wherein said second current equals the maximum charging current during a typical charge cycle of said device; and
applying a control signal to a control circuit to generate said minimum, said control circuit communicatively coupled to:
said charger at a first port, and
said battery at a second port.
23. The method of claim 22 wherein said charger powers said battery using a USB (Universal Serial Bus) connector.
24. The method of claim 23 wherein said estimated voltage is 5 volts.
25. The method of claim 22 wherein said first current is determined by dividing said power dissipation value by the difference between said estimated voltage and said battery voltage.
26. The method of claim 22 wherein said estimated voltage, said power dissipation value, and said maximum charging current are stored in a memory of said device.
27. A system for controlling the power dissipated by a device when charging a battery in said device, said system comprising:
monitoring the battery voltage of said battery;
first determining a first current based on a power dissipation value associated with said device, said battery voltage, and an estimated voltage output by a charger;
second determining a minimum of said first current and a second current, wherein said second current equals the maximum charging current during a typical charge cycle of said device; and
applying a control signal to a control circuit to generate said minimum, said control circuit communicatively coupled to:
said charger at a first port, and
said battery at a second port.
28. The system of claim 27 wherein said charger powers said battery using a USB (Universal Serial Bus) connector.
29. The system of claim 28 wherein said estimated voltage is 5 volts.
30. The system of claim 27 wherein said first current is determined by dividing said power dissipation value by the difference between said estimated voltage and said battery voltage.
31. The method of claim 28 wherein said estimated voltage, said power dissipation value, and said maximum charging current are stored in a memory of said device.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of manufacturing an insulated coil comprising:
stacking a mica layer sheet to which a resin is adhered and glass cloth to which a resin is adhered, followed by pressurizing to obtain a mica layer sheet to which the glass cloth is adhered;
applying a coating, to a surface of the glass cloth adhered to the mica layer sheet, of a mixture of inorganic particles having a thermal conductivity of at least 5 WmK, a resins, and a solvent to form a layer of the mixture of the inorganic particles, the resin, and the solvent;
reducing thickness of the layer of the mixture with a doctor blade, followed by pressurizing;
volatilizing the solvent in the layer of the mixture to leave a thermally conductive layer containing the inorganic particles on a surface of the glass cloth adhered to the mica layer sheet;
cutting the mica layer sheet to which the thermally conductive layer is attached to obtain a mica insulating tape with the thermally conductive layer on a surface of the glass cloth; and
winding the mica insulating tape around a coil conductor.
2. The method of manufacturing an insulated coil according to claim 1, wherein a gap of the doctor blade when the layer of mixture is reduced in thickness is in a range of 0.01 mm to 0.1 mm.
3. The method of manufacturing an insulated coil according to claim 1, wherein speed of the mica layer sheet relative to the doctor blade when reducing the thickness of the layer of the mixture does not exceed 5 mmin.
4. The method of manufacturing an insulated coil according to claim 1, wherein the glass cloth has an open area ratio in a range of 80% to 98%.