AT9919
Description
The AT9919 is a PWM controller IC designed to drive high brightness LEDs using a buck topology. It operates from an input voltage of 4.5 to 40VDC and employs hysteretic control with a high-side current sense resistor to set the constant output current.
Key Features
- Hysteretic control with high-side current sensing *
- Wide input voltage range: 4.5 to 40V *
- >90% Efficiency *
- Typical ±5% LED current accuracy *
- Up to 2.0MHz switching frequency *
- Adjustable constant LED current *
- Analog or PWM control signal for PWM dimming *
- Over-temperature protection *
- -40ºC to +125ºC operating temperature range *
- AEC-Q100 compliant
