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UC1635J883B Scheda tecnica(PDF) 1 Page - Texas Instruments |
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UC1635J883B Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 6 page 7/97 UC1635 UC2635 UC3635 Phase Locked Frequency Controller • Precision Phase Locked Frequency Control System • Crystal Oscillator • Programmable Reference Frequency Dividers • Phase Detector with Absolute Frequency Steering • Separate Divider Outputs and Phase Detector Input Pins • Double Edge Option on the Frequency Feedback Sensing Amplifier • Two High Current Op Amps • 5V Reference Output The UC1635 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 detector’s 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 device’s 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 detector’s 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. Additional features include a double edge option on the sense amplifier that can be used to double the loop reference frequency for increased loop bandwidths. A 5V reference output can be used to accurately set DC operating levels. FEATURES DESCRIPTION BLOCK DIAGRAM UDG-92019 |
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Descrizione simile - UC1635J883B |
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