Power converter output voltage clamp and supply terminal

摘要

A secondary control circuit includes a voltage regulator circuit coupled to an output of the power converter to provide a regulated power supply. One or more switched loads are coupled between a first terminal and an output ground terminal. The first terminal is coupled to the output of the power converter. Each switched load is coupled to draw a respective current from a load current to clamp the output of a power converter. One or more comparator circuits are coupled to a second terminal. The second terminal is coupled to receive an output sense signal. Each comparator circuit is coupled to receive a reference signal that is a scaled representation of a first reference signal. Each switched load is switched in response to a respective comparator circuit to draw a respective current from the load current of the power converter to clamp the output of the power converter.

主权项

1. A secondary control circuit for use in a power converter, comprising:
a voltage regulator circuit to be coupled to an output of the power converter coupled to provide power to an output load coupled to the output of the power converter, the voltage regulator circuit coupled to provide a regulated power supply of the secondary control circuit; one or more switched loads coupled between a first terminal and an output ground terminal of the power converter, wherein the first terminal is to be coupled to the output of the power converter, wherein each one of the one or more switched loads is coupled to draw a respective current from a load current to clamp the output of a power converter; and one or more comparator circuits coupled to a second terminal, the second terminal coupled to receive an output sense signal representative of an output of the power converter, wherein each one of the one or more comparator circuits is coupled to receive a respective one of one or more reference signals, wherein each respective one of the one or more reference signals is a scaled representation of a first one of the one or more reference signals, and wherein each one of the one or more switched loads is coupled to be switched in response to an output of a respective one of the one or more comparator circuits to draw the respective current from the load current of the power converter to clamp the output of the power converter.