AT9919 Datasheet - Microchip

AT9919 Hysteretic Buck High-Brightness LED Driver

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 VDC to 40 VDC 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 se.

AT9919 Features

* AEC-Q100 Qualified

* Hysteretic Control with High-side Current Sensing

* Wide Input Voltage Range: 4.5V to 40V

* >90% Efficiency

* Typical ±5% LED Current Accuracy

* Up to 2 MHz Switching Frequency

* Adjustable Constant LED Current

AT9919 Datasheet (532.81 KB)