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Circuit for obtaining less than 1 watt power consumption in a washer or dryer control

IP.com Disclosure Number: IPCOM000031213D
Publication Date: 2004-Sep-17
Document File: 3 page(s) / 89K

Publishing Venue

The IP.com Prior Art Database

Abstract

The following circuit allows for easy switching off of operating components of a washer or dryer control system where multiple power supplies are involved for powering the various components of the appliance. The circuit uses FET devices to switch off power sources that are not need in a "Stand-by" or non-functioning mode of the appliance. This approach also allows for the microcontroller to be put into a sleep mode by keeping only the 5 volt line alive to the required pins. The advantage of this is that it allows the appliance to be powered up by a membrane switch instead of a hard switch, therefore allowing for very late definition of the switch location in a development program. Other advantages include minimal risk of EMI or radiated transients to the DC side of the control from the switch.

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INVENTION DISCLOSURE

Subject: ______ Circuit for obtaining less than 1 watt power consumption in a washer or dryer
control ___________________________________________________

Sketch and Description: The following circuit allows for easy switching off of operating components of a washer or dryer control system where multiple power supplies are involved for powering the various components of the appliance. The circuit uses FET devices to switch off power sources that are not need in a "Stand-by" or non-functioning mode of the appliance. This approach also allows for the microcontroller to be put into a sleep mode by keeping only the 5 volt line alive to the required pins. The advantage of this is that it allows the appliance to be powered up by a membrane switch instead of a hard switch, therefore allowing for very late definition of the switch location in a development program. Other advantages include minimal risk of EMI or radiated transients to the DC side of the control from the switch.

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