Power management circuit
AssigneeQuanta Computer Inc.
InventorWei-Ting YEN
Life of this patent
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Abstract
A power management circuit for a battery cell is provided. The battery cell is coupled to a load through an output terminal. The power management circuit includes a current detection circuit, a loading determination circuit, and a voltage determination circuit. The current detection circuit detects a discharge current of the battery cell when the battery cell is discharged through the load to generate a discharge-current signal. The loading determination circuit determines a loading value of the load according to the discharge-current signal to generate a loading signal. When the battery voltage of the battery cell drops to the cut-off voltage, the power management circuit terminates the discharge of the battery cell through the load.
Claims10
A power management circuit for a battery cell coupled to a load through an output terminal comprising:
- a current detection circuit detecting a discharge current of the battery cell when the battery cell is discharged through the load to generate a discharge-current signal;
- a loading determination circuit determining a loading value of the load according to the discharge-current signal to generate a loading signal;
- and
- a voltage determination circuit receiving the loading signal and determining a cut-off voltage of the battery cell according to the loading signal,
- wherein when the battery voltage of the battery cell drops to the cut-off voltage, the power management circuit terminates the discharge of the battery cell through the load.
Dependencies are inferred from the claim text.