AT9933 Datasheet (Supertex) - Hysteretic Boost-Buck (cuk) LED Driver

AT9933, Hysteretic Boost-Buck (cuk) LED Driver

The AT9933 is a variable frequency PWM controller IC, designed to control an LED lamp driver using a low-noise boost-buck (Ćuk) topology.

The AT9933 uses patent-pending hysteretic current-mode control to regulate both the input and the output currents.

This enables superior input surge immunity with

AT9933 Features

* Constant current LED Driver Steps input voltage Up or Down Low EMI Variable frequency operation Internal 8 to 100V linear regulator Input and output current sensing Input current limit Enable & PWM dimming Ambient temperature rating up to 1