Click to expand full text
P1/9
HIGH-VOLTAGE MONOLITHIC IC
ECN3022
ECN3022 is a single chip three-phase bridge inverter IC which has 6 IGBTs in the circuit. Especially, it is very suitable for controlling the speed of 3-phase DC brushless motors to which converted AC200∼230V power supplies are applied. Fig. 1 shows the internal block diagram. Functions ∗ Integrated charge pump circuit ∗ Integrated free wheel diodes ∗ Integrated PWM circuit ∗ Integrated FG circuit ∗ Integrated over current protection circuit ∗ Integrated rotating direction monitor circuit ∗ All output IGBTs shut off function Features ∗ Speed control for a 3-phase DC brushless motor is available with an external microprocessor. ∗ Bottom arm circuits can be operated in 20kHz chopping frequency of PWM. ∗ For converted AC200 to 230V power supplies.