iC-GE and iC-GE100 are PWM drivers for inductive loads, such as relays, valves and other inductive actuators.
The setpoints for the coil's energizing and hold current are preset by means of external resistors RACT and RHOLD. These currents can be set in a range from 100 mA to 1 A (iC-GE) resp. 10 to 100 mA (iC-GE100). The drivers intrinsically switch from energizing to hold mode after 50 ms, provided that the energizing current has been reached. A capacitor at TACT prolongs the time before the switching to hold mode occurs (iC-GE only). The changeover between energizing and hold modes is suitable for typical relays, requiring a powerful initial energizing current, which can then be reduced after closing the air gap in the magnetic circuit. The quadratic dependence on the current means that reducing the current by e.g. 30% reduces the power dissipation by more than 50%.