Power bank circuit and the method thereof
First Claim
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1. A power bank circuit, comprising:
- a high voltage port;
a low voltage port;
an intermediate port;
a first power switch, coupled between the high voltage port and the intermediate port;
a second power switch, coupled between the intermediate port and a reference ground;
an inductor, coupled between the low voltage port and the intermediate port;
a first capacitor, coupled between the high voltage port and the reference ground;
a second capacitor, coupled between the low voltage port and the reference ground; and
a controller, configured to receive;
a high voltage sense signal indicative of a voltage at the high voltage port, a high port current sense signal indicative of a current flowing through the high voltage port, a low voltage sense signal indicative of a voltage at the low voltage port, a low port current sense signal indicative of a current flowing through the low voltage port, and wherein the controller is configured to generate a first switch control signal and a second switch control signal to control the operations of the first power switch and the second power switch, respectively.
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Abstract
A power bank circuit controlling power switches to operate at different modes in accordance with different external coupling situations is discussed. The power bank circuit may be coupled to either a power source, a digital device, or a plurality of series coupled batteries at a high voltage port; and may be coupled to either a power source, a digital device, or a single battery at a low voltage port.
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Citations
16 Claims
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1. A power bank circuit, comprising:
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a high voltage port; a low voltage port; an intermediate port; a first power switch, coupled between the high voltage port and the intermediate port; a second power switch, coupled between the intermediate port and a reference ground; an inductor, coupled between the low voltage port and the intermediate port; a first capacitor, coupled between the high voltage port and the reference ground; a second capacitor, coupled between the low voltage port and the reference ground; and a controller, configured to receive;
a high voltage sense signal indicative of a voltage at the high voltage port, a high port current sense signal indicative of a current flowing through the high voltage port, a low voltage sense signal indicative of a voltage at the low voltage port, a low port current sense signal indicative of a current flowing through the low voltage port, and wherein the controller is configured to generate a first switch control signal and a second switch control signal to control the operations of the first power switch and the second power switch, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method used for a power bank circuit, the power bank circuit including a high voltage port, a low voltage port, and a charge-discharge circuit coupled between the high voltage port and the low voltage port, the method comprising:
controlling the charge-discharge circuit to operate under different modes according to different coupling situations; when the high voltage port is coupled to a power source, and the low voltage port is coupled to a single battery;
controlling the charge-discharge circuit to operate at step-down charge mode, so that the single battery is charged by the power source;when the high voltage port is coupled to a digital device, and the low voltage port is coupled to the single battery;
controlling the charge-discharge circuit to operate at step-up discharge mode, so that the digital device is powered by the single battery;when the high voltage port is coupled to two series coupled batteries, and the low voltage port is coupled to the power source;
controlling the charge-discharge circuit to operate at step-up charge mode, so that the two series coupled batteries are charged by the power source; andwhen the high voltage port is coupled to the two series coupled batteries, and the low voltage port is coupled to the digital device;
controlling the charge-discharge circuit to operate at step-down discharge mode, so that the digital device is powered by the two series coupled batteries.
Specification