Microchip Technology HV9919B
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.| Part No. | HV9919B |
|---|---|
| Datasheet | HV9919B Download |
| Manufacturer |  Microchip Technology |
| Description | High Brightness LED Driver |
| Buy | Stock & Price |
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
Set the operating frequency range by selecting the proper inductor. Ope
