Power management device
First Claim
1. A power management device, comprising:
- a first voltage regulator to provide regulated power to at least one device external to the power management device;
a second voltage regulator to provide regulated power to the at least one device external to the power management device, wherein the second voltage regulator is configured to provide greater current levels than the first voltage regulator;
a controller to switch between operation of the first voltage regulator and the second voltage regulator; and
a switch to tie a power output lead to a potential that prevents floating when the power output lead is not providing power.
3 Assignments
0 Petitions
Accused Products
Abstract
A power management device is adapted to reduce power consumption, particularly in battery-powered applications such as within a node in a utility network (e.g., in a gas, water, or other utility application). In one example, a low-current voltage regulator provides power to a processor during low-power “sleep” states. A high-current voltage regulator provides power to the processor, metrology devices and/or a radio during “awake” states. A buck-boost device may provide power to a transmitter during radio frequency (RF) transmissions. A max device may determine a greater of voltages output by a battery and the buck-boost device, and use the higher to power the high-current voltage regulator. The power management device may include a state machine, which may include several states and operations to perform within each state. In one state, the processor enters a sleep state prior to recovery of battery voltage after a transmission state.
13 Citations
17 Claims
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1. A power management device, comprising:
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a first voltage regulator to provide regulated power to at least one device external to the power management device; a second voltage regulator to provide regulated power to the at least one device external to the power management device, wherein the second voltage regulator is configured to provide greater current levels than the first voltage regulator; a controller to switch between operation of the first voltage regulator and the second voltage regulator; and a switch to tie a power output lead to a potential that prevents floating when the power output lead is not providing power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A utility meter, comprising:
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a metrology device to obtain metrology information; a transmitter to transmit the metrology information; a processor to operate the metrology device and/or the transmitter; a battery to provide power; a buck-boost device to receive the power from the battery and to provide power to the transmitter; a power management device, comprising a state machine and states comprising; a sleep period as the battery recovers in which the processor is put to sleep; and a sleep period with minimal current use in which the buck-boost device is turned off; a first voltage regulator to provide regulated power to devices within the utility meter; a second voltage regulator to provide regulated power to devices within the utility meter, wherein the second voltage regulator is configured to provide greater current levels than the first voltage regulator at a similar voltage and wherein only one of the first voltage regulator or the second voltage regulator is operational at a time; and a max device to; determine whether voltage of the battery or voltage of the buck-boost device is higher; and select the battery or the buck-boost device to supply power to the second voltage regulator based on the determination. - View Dependent Claims (9, 10, 11, 12)
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13. A utility meter, comprising:
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a metrology device to obtain metrology information; a transmitter to transmit the metrology information; a battery to provide power; a buck-boost device, configured to; receive power from the battery; and power the transmitter; a processor to manage operation of the transmitter and to enter a sleep mode after a transmission sent by the transmitter and before recovery of the battery; a max device to turn off the buck-boost device upon recovery of the battery after the transmission; and one or more switches to prevent floating of power output leads not providing power. - View Dependent Claims (14, 15, 16)
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17. A power management device, comprising:
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a first voltage regulator to provide regulated power to at least one device external to the power management device; a second voltage regulator to provide regulated power to the at least one device external to the power management device, wherein the second voltage regulator is configured to provide greater current levels than the first voltage regulator; a controller to switch between operation of the first voltage regulator and the second voltage regulator; a buck-boost device to provide a programmable output voltage; and a max device to determine whether voltage from a battery or voltage provided by the buck-boost device is higher and the select the higher of the voltage of the battery and the voltage from the buck-boost device to supply the second voltage regulator.
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Specification