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L4990 PRIMARY CONTROLLER

L4990 Description

® L4990 L4990A PRIMARY CONTROLLER CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SU.
This primary controller I.

L4990 Features

* as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start intervention.

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PRIMARY CONTROLLER STMicroelectronics
STMicroelectronics L4990-like datasheet