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Why do pulse output continuously during push pull operation of uPC494?

Latest Updated:11/01/2005

Question:

A pulse is sometimes output continuously during push-pull operation of the uPC494.

Answer:

Noise may have entered the GND pin causing malfunction. Check your ground wiring.
Is there a capacitor connected between the Ref Out pin (pin 14) and GND pin (pin 7)? If so, be sure to use a film, tantalum, or ceramic capacitor.
Suitable Products
Power Management Linear