Phase Locked Frequency Controller

The UC1635 UC2635 UC3635 family of integrated circuits was designed for use in preci- sion speed control of DC motors. An extension to the UC1633 line of phase locked controllers, these devices provide access to both of the digital phase detectors inputs, and include a reference frequency di- vider output pin. With this added flexibility, this family of controllers CAN be used to obtain phase synchronization of multiple motors. A reference frequency CAN be generated using the devices crystal oscil- lator and programmable dividers. The Oscillator operates using a broad range of crystals, or, CAN function as a Buffer stage to an external fre- quency source. The phase detector responds proportionally to the phase error between the detectors minus input pin and the sense Amplifier output. This phase detector includes absolute frequency steering to provide maxi- mum drive signals when any frequency error exists. This feature allows optimum start-up and lock times to be realized. Two op-amps are included that CAN be configured to provide necessary loop filtering. The outputs of these op-amps will source or sink in excess of 16mA, so they CAN provide a low impedance control signal to driving circuits. By Texas Instruments
UC2635 's PackagesUC2635 's pdf datasheet

UC2635 Pinout, Pinouts
UC2635 pinout,Pin out
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