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UC3634 Datasheet(PDF) 1 Page - Texas Instruments |
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UC3634 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 5 page Phase Locked Frequency Controller UC1634 UC2634 UC3634 FEATURES • Precision Phase Locked Frequency Control System • Communication 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 mo- tors. These devices include most of the features of the general purpose UC1633 Phase Locked Control family and also provide the out-of-phase commutation signals required for driving two phase brushless motors. Only an external power booster stage is required for a complete drive and control system. The two commutation outputs are open collector devices that can sink in excess of 16mA. A disable input allows the user to simul- taneously force both of these outputs to an active low state. Double edge logic, following the sense amplifier, doubles the ref- erence frequency at the phase detector by responding to both edges of the input signal at Pin 7. BLOCK DIAGRAM 6/93 |
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