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LD7838 - High Power Factor Flyback LED Controller

General Description

The LD7838 is a 700V HV start-up active PFC Flyback controller, specially designed for LED lighting application.

This device operates in transition or boundary mode and integrates with completed protections required.

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

Key Features

  • High voltage (700V) startup circuit by HV pin for 85~305VAC input range.
  • High Power Factor ( > 0.92).
  • High-efficiency Transition mode operation.
  • Lower Power Saving ( < 0.5W).
  • Accurate OLP Compensation for High/ Low Line.
  • Built in BNI/ BNO Function.
  • Wide UVLO (16Von and 8 Voff) range.
  • Built in VCC Over Voltage Protection.
  • Built in Over Load Protection.
  • Adjustable Over Output Current Protection (Cycle by Cycle Current Limiting).
  • Internal Over.

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Datasheet Details

Part number LD7838
Manufacturer Leadtrend Technology
File Size 489.21 KB
Description High Power Factor Flyback LED Controller
Datasheet download datasheet LD7838 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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LD7838 11/22/2016 High Power Factor Flyback LED Controller with HV Start-up REV. 01 General Description The LD7838 is a 700V HV start-up active PFC Flyback controller, specially designed for LED lighting application. This device operates in transition or boundary mode and integrates with completed protections required. It minimizes the components counts in either SOP-7 package. Those make it easy to design with for costeffective applications. With High Voltage start-up technology, power factor correction and boundary mode switching control, the start-up time and resistor loss could be minimized efficiently. The circuit can easily achieve power factor is upper 0.92 to meet most of the international requirements as IEC61000-3-2 standard certifications.