Proximity detection circuit having short protection
First Claim
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1. A proximity detection circuit for use in awakening a microcontroller to detect connection of a charging cordset to a receptacle of a vehicle charging system, the proximity detection circuit comprising:
- a low-voltage power supply;
a pulse signal generating circuit operable to generate a first signal having a first duration, the pulsed signal generating circuit being powered by the low-voltage power supply;
a connection circuit configured to adjust an input voltage of the pulse signal generation circuit upon connection of the charging cordset to the vehicle charging system in order to enable the pulse signal generating circuit to generate the first signal, the connection circuit being powered by the low-voltage power supply; and
a short protection circuit configured to disconnect the connection circuit from the low-voltage power supply.
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Abstract
A proximity detection circuit is contemplated to detect connection of a cordset to a vehicle charging system or connection of another device to some other electrical circuit where it may be desirable to facilitate detection. A short protection circuit may be included as part of the proximity detection circuit to facilitate disconnection in the event of a shorter other condition where undesirable currents and/or voltages may be propagated to other systems of portions of the vehicle charging system.
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Citations
17 Claims
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1. A proximity detection circuit for use in awakening a microcontroller to detect connection of a charging cordset to a receptacle of a vehicle charging system, the proximity detection circuit comprising:
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a low-voltage power supply; a pulse signal generating circuit operable to generate a first signal having a first duration, the pulsed signal generating circuit being powered by the low-voltage power supply; a connection circuit configured to adjust an input voltage of the pulse signal generation circuit upon connection of the charging cordset to the vehicle charging system in order to enable the pulse signal generating circuit to generate the first signal, the connection circuit being powered by the low-voltage power supply; and a short protection circuit configured to disconnect the connection circuit from the low-voltage power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A proximity detection circuit for a vehicle charging system comprising:
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a low-voltage power supply; a connection circuit configured to generate a signal upon connection of a charging cordset to the vehicle charging system, the connection circuit being powered by the low-voltage power supply; and a protection circuit configured to disconnect the connection circuit from the low-voltage power supply upon occurrence of a reverse current flow to the low-voltage power supply. - View Dependent Claims (14, 15, 16, 17)
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Specification