Voltage reference capable of sourcing up to 240µA. The current sunk from this pin fixes the switching frequency of the half-bridge for each operating state. A resistor (RRUN) connected to ground sets the half-bridge operating frequency combined with the capacitor connected to the pin OSC.
A resistor connected to EOI (RPRE) sets the maximum half-bridge switching frequency during preheating combined with RRUN and COSC.