Patent ID: 9703311
Date: 2017-07-11
CPC Classifications: G05F

Claim:
1. An interface module for use in a power conversion system, comprising: a first current circuit coupled to a single external programming terminal, wherein the first current circuit is coupled to conduct a programming current through an external programming circuitry coupled to the single external programming terminal, wherein the programming current is conducted through the external programming circuitry during normal operation of the power conversion system; a current comparator coupled to the first current circuit to compare a current representative of the programming current with an internal current; a mode select circuit coupled to the current comparator to generate a select signal to select one of a plurality of modes in response to a comparison of the current representative of the programming current with the internal current by the current comparator; and a second current circuit coupled to the first current circuit and the mode select circuit to generate a reference current in response to the programming current through the external programming circuitry during the normal operation of the power conversion system and the select signal from the mode select circuit.