HV9919B Datasheet (Microchip) - High Brightness LED Driver

HV9919B, High Brightness LED Driver

HV9919B is a Pulse-Width Modulation (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 highside current sense resistor, to set the constant output current.

Set the operating freque

HV9919B 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