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L4984 - CCM PFC controller

Datasheet Summary

Description

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Features

  • Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators.
  • Proprietary LM-FOT modulator for nearly fixedfrequency operation.
  • Proprietary multiplier design for minimum THD of AC input current.
  • Fast “bi-directional” input voltage feedforward (1/V2 correction).
  • Accurate adjustable output overvoltage protection.
  • Protection against feedback loop failure (latched shutdown).
  • Inductor saturation protection.
  • AC brownout detection.
  • Digi.

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Datasheet preview – L4984

Datasheet Details

Part number L4984
Manufacturer STMicroelectronics
File Size 2.36 MB
Description CCM PFC controller
Datasheet download datasheet L4984 Datasheet
Additional preview pages of the L4984 datasheet.

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Full PDF Text Transcription

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L4984 CCM PFC controller Features ■ Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators ■ Proprietary LM-FOT modulator for nearly fixedfrequency operation ■ Proprietary multiplier design for minimum THD of AC input current ■ Fast “bi-directional” input voltage feedforward (1/V2 correction) ■ Accurate adjustable output overvoltage protection ■ Protection against feedback loop failure (latched shutdown) ■ Inductor saturation protection ■ AC brownout detection ■ Digital leading-edge blanking on current sense ■ Soft-start ■ 1% (at Tj = 25 °C) internal reference voltage ■ - 600 / + 800 mA totem pole gate driver with active pull-down during UVLO and voltage clamp ■ SSOP10 package Applications ■ PFC pre-regulators for: – IEC61000-3-2 and JEIDA-MITI compliant SMPS i
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