Power supply for a communications module that demands high power during predetermined periods
First Claim
1. A power supply including:
- a supply rail that provides a supply current of up to a predetermined current limit to a load that draws a load current; and
a supercapacitive device connected in parallel with the supply rail or the load for allowing the load current to temporarily exceed the predetermined current limit while maintaining the supply current at less than the predetermined current limit.
3 Assignments
0 Petitions
Accused Products
Abstract
A power supply (1) is provided for a communications module, in the form of a cellular telephone GPRS module (2). This module demands high power during predetermined periods. Supply (1) includes a battery module (3) for providing module (2) with a supply voltage that, in this embodiment, is about 3.6 Volts. During the predetermined periods, module (3) provides a first current at a first voltage that is less than the supply voltage. A supercapacitive device, in the form of a single supercapacitor (4), is connected in parallel with module (3) for providing module (2) with, a second current during the predetermined periods such that first voltage is maintained above about 90% of the supply voltage. That is, the first voltage is maintained above about 3.24 Volts.
32 Citations
14 Claims
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1. A power supply including:
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a supply rail that provides a supply current of up to a predetermined current limit to a load that draws a load current; and
a supercapacitive device connected in parallel with the supply rail or the load for allowing the load current to temporarily exceed the predetermined current limit while maintaining the supply current at less than the predetermined current limit. - View Dependent Claims (2, 3, 4, 8)
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5. A power supply for a load, the power supply including:
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a voltage rail for providing a voltage to the load;
a supercapacitive device having a predetermined footprint and a predetermined ESR for connecting to the rail in parallel with the load, wherein the quotient of the predetermined footprint and the predetermined ESR is greater than about 4 mm2/mΩ
. - View Dependent Claims (6, 7)
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9. A power supply for a load, the power supply including:
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a voltage rail for providing a voltage to the load;
a supercapacitive device having a predetermined volume and a predetermined ESR for connecting to the rail in parallel with the load, wherein the quotient of the predetermined volume and the predetermined ESR is greater than about 6 mm3/mΩ
. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification