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FL7921R - PWM Lightning Controller

General Description

The highly integrated FL7921R combines a Power Factor Correction (PFC) controller and a Quasi

Resonant PWM controller.

Integration provides cost effect design and allows for fewer external components.

time technique to provide a regulated DC outp

Key Features

  • Integrated PFC and Flyback Controller.
  • Critical.
  • Mode PFC Controller.
  • Zero.
  • Current Detection for PFC Stage.
  • Quasi.
  • Resonant Operation for PWM Stage.
  • Internal Minimum tOFF 8 ms for QR PWM Stage.
  • Internal 10 ms Soft.
  • Start for PWM.
  • Brownout Protection.
  • High / Low Line Over.
  • Power Compensation.
  • Auto Recovery Over.
  • Current Protection.
  • Auto Recovery Open.
  • Loop P.

📥 Download Datasheet

Datasheet Details

Part number FL7921R
Manufacturer onsemi
File Size 934.83 KB
Description PWM Lightning Controller
Datasheet download datasheet FL7921R 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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Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Lightning Controller FL7921R Description The highly integrated FL7921R combines a Power Factor Correction (PFC) controller and a Quasi−Resonant PWM controller. Integration provides cost effect design and allows for fewer external components. For PFC, FL7921R uses a controlled on−time technique to provide a regulated DC output voltage and to perform natural power factor correction. An innovative THD optimizer reduces input current distortion at zero−crossing duration to improve THD performance. The PFC function is always on regardless of the PWM stage load condition to ensure that high PF can be achieved at light load condition.