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US 6,642,632 B2Granted
Efficient battery transfer circuit
AssigneeMitel Knowledge Corporation
InventorsChristopher Graham Lucas, Scott Richard Burton
Life of this patent
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AssigneeMitel Knowledge Corporation
InventorsChristopher Graham Lucas, Scott Richard Burton
Estimating the term…
The present invention is a battery transfer circuit connected to a load, a power supply for powering the load with at least a minimum supply voltage during normal operating conditions, and a source of battery voltage for powering the load during a power fail condition when the power supply is unable to power said load at the minimum supply voltage. The battery transfer circuit comprises a first circuit for applying at least the minimum supply voltage to the load during normal operating conditions and a second circuit for charging the battery to an optimal voltage greater than the minimum supply voltage and for down-regulating the optimal charge voltage to a predetermined voltage and for applying the predetermined voltage to the load during the power fail condition, wherein the predetermined voltage is less than the minimum supply voltage.
A battery transfer circuit connected to a load, a power supply for powering said load with at least a minimum supply voltage during normal operating conditions, and a source of battery voltage for powering said load during a power fail condition when said power supply is unable to power said load at said minimum supply voltage, said battery transfer circuit comprising:
Dependencies are inferred from the claim text.