Article: Simple circuit allows long PWM soft starts.

Robert N Buono, Aeolian Audio LLC, Bloomfield, NJ

Edited by Brad Thompson and Fran Granville

Available from multiple sources, the UC384X family of current-mode, PWM (pulse-width-modulated) power-supply controllers offers good performance and has spawned a variety of similar ICs. All members of the UC384X family and its variants share a common characteristic--an internal voltage-error amplifier that provides a current-limited output. Designated as the COMP pin, the amplifier's output provides a convenient connection for applying compensation to ensure overall feedback-loop stability. In addition, the COMP pin allows attachment of shutdown and ...

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