AT9933 Description
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 without the necessity for plex loop pensation.
AT9933 Key Features
- Constant current LED Driver Steps input voltage Up or Down Low EMI Variable frequency operation Internal 8 to 100V linea
- 100% and a high dimming ratio. The AT9933 based LED driver is ideal for automotive LED lamps. The part is rated for up t