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UC2635DWTR PDF预览

UC2635DWTR

更新时间: 2024-11-23 23:38:55
品牌 Logo 应用领域
其他 - ETC 光电二极管
页数 文件大小 规格书
5页 363K
描述
Analog Phase-Locked Loop

UC2635DWTR 数据手册

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UC1635  
UC2635  
UC3635  
Phase Locked Frequency Controller  
FEATURES  
DESCRIPTION  
Precision Phase Locked Frequency  
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.  
Control System  
Crystal Oscillator  
Programmable Reference Frequency  
Dividers  
Phase Detector with Absolute Frequency  
Steering  
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.  
Separate Divider Outputs and Phase  
Detector Input Pins  
Double Edge Option on the Frequency  
Feedback Sensing Amplifier  
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 High Current Op Amps  
5V Reference Output  
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.  
BLOCK DIAGRAM  
UDG-92019  
7/97  
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