CIRCUIT FOR CHARGING PROTECTION WITH ENHANCED OVERCURRENT PROTECTION CIRCUITRY
First Claim
1. A charging protection circuit comprising:
- a fuse with a first end and a second end, the first end being coupled to a power supply for receiving a current from the power supply and the second end transmitting the current;
an output end coupled to the second end of the fuse for outputting the current transmitted from the power supply; and
an over-current protector coupled to the second end of the fuse for increasing a current load of the fuse in order to burn down the fuse when the current at the second end is greater than a predetermined value.
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Accused Products
Abstract
A charging protection circuit with an overcurrent protector circuit takes input from a power supply, and provides output power to a power storage device, such as a battery. A fuse is connected between an input and an output of the charging protection circuit to protect the power storage device from a current spike, or overcurrent, that would damage the power storage device. When the overcurrent is above a threshold of the fuse, the fuse melts, effectively creating an open circuit and blocking the overcurrent from reaching the power storage device. To speed up the fuse meltdown, the overcurrent protector circuit is connected to the output of the fuse, and draws an extra current through the fuse when the overcurrent is detected.
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Citations
16 Claims
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1. A charging protection circuit comprising:
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a fuse with a first end and a second end, the first end being coupled to a power supply for receiving a current from the power supply and the second end transmitting the current;
an output end coupled to the second end of the fuse for outputting the current transmitted from the power supply; and
an over-current protector coupled to the second end of the fuse for increasing a current load of the fuse in order to burn down the fuse when the current at the second end is greater than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification