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LD7837 - High Performance Primary Side Flyback LED Controller

General Description

The LD7837 is a high performance primary side Flyback or Buck Boost LED Controller with HV start-up special design for LED lighting.

This IC operating on transition mode(TM) and integrated with completed safety requirement protections.

It minimizes the components counts in a SOP-7 package.

Key Features

  • High voltage 700V startup circuit.
  • Primary Side PFC controller.
  • Optimize THDi Over Wide Universal Range.
  • High LED Current Accuracy.
  • Line Regulation 1%.
  • +/-10% output voltage variation Regulation +/-1%.
  • ± 5% Inductance variation ± 2%.
  • Power Saving 0.3W @ No Load VAC=264V.
  • Output Short Circuit Protection.
  • CS Short / Open Protection.
  • 150/-450mA Driving Capability.

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Datasheet Details

Part number LD7837
Manufacturer Leadtrend
File Size 778.94 KB
Description High Performance Primary Side Flyback LED Controller
Datasheet download datasheet LD7837 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.

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LD7837 04/06/2017 High Performance Primary Side Flyback LED Controller with HV Start-up REV. 00 General Description The LD7837 is a high performance primary side Flyback or Buck Boost LED Controller with HV start-up special design for LED lighting. This IC operating on transition mode(TM) and integrated with completed safety requirement protections. It minimizes the components counts in a SOP-7 package. Those make it easy design for cost- effective applications. This chip provides High Current Accuracy at full input voltage range form from 85V to 277V Vac. The constant on time PFC control and THDi compensator could easily achieve PF>0.90 and THDi <10% to meet most of the international standard requirements.