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HV9919B Datasheet High Brightness LED Driver

Manufacturer: Microchip Technology

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General Description

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 frequency range by selecting the proper inductor.

Overview

HV9919B Hysteretic, Buck, High Brightness LED Driver with High-Side Current.

Key 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 for PWM dimming.
  • Over-temperature protection.
  • -40ºC to +125ºC operating temperature range.

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