AT9919 Datasheet Hysteretic Buck High-brightness Led Driver

Manufacturer: Microchip Technology

Overview: AT9919 Hysteretic Buck High-Brightness LED Driver with High-Side Current.

Datasheet Details

Part number	AT9919
Manufacturer	Microchip Technology
File Size	532.81 KB
Description	Hysteretic Buck High-Brightness LED Driver
Datasheet	AT9919-Microchip.pdf

General Description

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 selecting the proper inductor.

Key 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.
Analog or Pulse-Width Modulation (PWM) Control Signal for PWM Dimming.
Overtemperature Protection.
40ºC to +125ºC Operating Temperature Range.

AT9919 Distributor

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