Switchmode Driver For 3-?? Brushless DC Motors

The UC3620 is a brushless DC Motor Driver capable of decoding and driving all 3 windings of a 3-phase brushless DC motor. In addition, an on-board current Comparator Oscillator and high gain Op-Amp provide all necessary circuitry for implementing a high performance, chopped mode servo Amplifier Full protection, including thermal shutdown, pulse-by-pulse current limiting, and under-voltage lockout aid in the simple implementation of reliable designs. Both conducted and radiated EMI have been greatly reduced by limiting the output dv/dt to 150V/s for any load condition. The UC1620SP is characterized for operation over the full military tem- perature range of -55C to +125C, while the UC3620SP is charac- terized for 0C to +70C. By Texas Instruments