Click to expand full text
HIGH-VOLTAGE MONOLITHIC IC
ECN3021
ECN3021 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
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.