AT9919 Datasheet (Supertex) - High Brightness LED Driver

AT9919, High Brightness LED Driver

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.

The operating frequency range can be set by sel

AT9919 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