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HV9919B - High Brightness LED Driver

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.

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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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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HV9919B Hysteretic, Buck, High Brightness LED Driver with High-Side Current Sensing 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 Applications • Low-voltage industrial and architectural lighting • General purpose constant current source • Signage and decorative LED lighting • Indicator and emergency lighting 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.