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TB9931 - Unity Power Factor LED Lamp Driver

Download the TB9931 datasheet PDF. This datasheet also covers the TB9931-Top variant, as both devices belong to the same unity power factor led lamp driver family and are provided as variant models within a single manufacturer datasheet.

Key Features

  • ± Constant output current ± Large step-down ratio ± Unity power factor ± Low input current harmonic distortion ± Fixed frequency or fi xed off-time operation ± Internal 450V linear regulator ± Input and output current sensing ± Input current limit ± Enable, PWM and phase dimming.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (TB9931-Top-Best.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number TB9931
Manufacturer Top-Best
File Size 171.01 KB
Description Unity Power Factor LED Lamp Driver
Datasheet download datasheet TB9931 Datasheet

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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.

View original datasheet text
TB9931 Unity Power Factor LED Lamp Driver Description Features ± Constant output current ± Large step-down ratio ± Unity power factor ± Low input current harmonic distortion ± Fixed frequency or fi xed off-time operation ± Internal 450V linear regulator ± Input and output current sensing ± Input current limit ± Enable, PWM and phase dimming Applications ± Offl ine LED lamps and fi xtures ± Street lamps ± Traffi c signals ± Decorative lighting General Description The TB9931 is a fi xed frequency PWM controller IC designed to control an LED lamp driver using a single-stage PFC buckboost-buck topology. It can achieve a unity power factor and a very high step-down ratio that enables driving a single high-brightness LED from the 85-264VAC input without a need for a power transformer.