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. It 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
- AEC-Q100 Automotive Qualified, See Product Identification System
- Constant Current LED Driver
- Steps Input Voltage Up or Down
- Low Electromagnetic Interference (EMI)
- Variable Frequency Operation
- Internal 75V Linear Regulator
- Input and Output Current Sensing
- Input Current Limit
- Enable and Pulse-width Modulation (PWM)
- Ambient Temperature Rating of up to 125°C