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AT9919K7-G 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.

Product Features

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-With Modulation (PWM) Control Signal for PWM Dimming

Overtemperature Protection

–40ºC to +125ºC Operating Temperature Range

Applications

LED Lighting Applications

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