UC3634 Datasheet | Unitrode

FEATURES - - - - - - - - - Precision Phase Locked Frequency Control System munication Logic for 2-Phase Motors Disable Input for Motor Inhibit Crystal Oscillator Programmable Reference Frequency Dividers Phase Detector with Absolute Frequency Steering Digital Lock Indicator Two High Current Op-Amps 5V Reference Output DESCRIPTION The UC1634 series of devices is optimized to provide precision phase locked frequency control for two phase DC brushless motors. These devices include most of the features of the general purpose UC1633 Phase Locked Control family and also provide the out-of-phase mutation signals required for driving two phase brushless motors. Only an external power booster stage is required for a plete drive and control system. The two mutation outputs are open collector devices that can sink in excess of 16m A. A disable input allows the user to simultaneously force both of these outputs to an active low state. Double edge logic, following the sense amplifier, doubles the...