HR2000 Fluorescent Lamp HB Driver SOIC16

HR2000 Fluorescent Lamp HB Driver SOIC16

The HR2000 is a fluorescent lamp ballast controller with PFC function and high voltage half-bridge driver.

Key Specifications

Features

• PFC PART
• Only four pins realize PFC function.
• Ton control.
• Boundary Conduction Mode operation.
• Less peripheral components.
• Over voltage and over current protection. HALF-BRIDGE PART
• 600V bootstrap half-bridge driver.
• Programmable preheat current.
• Programmable preheat time.
• Programmable ignition time.

Typical Application Circuit

Applications

• Tube fluorescent lamp ballast

Design Notes

• Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
• In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
• Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
• Size the inductor and output capacitor for the string current ripple, not the total LED current.

Common Questions