CONFIGURABLE POWER CONTROLLER WITH COMBINATION INPUT

摘要

Embodiments described herein describe a power supply configured to provide power to an output load via a power supply transformer. The power supply includes a controller configured to operate in a configuration state and an operating state. During the configuration state, the controller receives a configuration signal from a sense circuit coupled to the controller and selects one of a plurality of operating modes from the configuration signal. During the operating state, the controller controls a switch coupled to the transformer based on the selected operating mode and a sense signal received from the sense circuit representative of the power provided to the output load by the power supply. When the switch is closed, current flows from a power source through the transformer, and when the switch is open, current is prevented from flowing from the power source through the transformer.

主权项

1. A power supply comprising:
a transformer configured to provide power to an output load, the transformer coupled to a power source; a switch, coupled to the transformer, configured to allow current to flow from the power source through the transformer when closed and to prevent current from flowing from the power source through the transformer when open; a sense circuit configured to provide a sense signal representative of the power provided to the output load, the sense circuit comprising at least one resistor; and a controller comprising a current source and a second switch, the second switch configured to allow current to flow from the current source and out a combination input/output line when the controller is in a configuration state and to isolate the current source from the combination input/output line when the controller is in an operating state, the controller configured to:
responsive to being in the configuration state, output a current through the combination input/output line to the sense circuit and detect a corresponding voltage across the at least one resistor; andresponsive to being in the operating state, receive the sense signal via the combination input/output line and control the opening and closing of the switch based on the sense signal and one of a plurality of operating modes selected based on the detected corresponding voltage.