Datasheet4U Logo Datasheet4U.com

L4984 - CCM PFC controller

General Description

.

.

.

.

.

.

Key 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.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
L4937 Dual Low Drop Fixed Output Linear Regulator ETC
L493EC T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493GC T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493GT T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493IT T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC

Other Datasheets by STMicroelectronics

Part Number Description
L4984D CCM PFC controller
L4981A POWER FACTOR CORRECTOR
L4981B POWER FACTOR CORRECTOR
L4985 CCM PFC controller
L4986 CCM PFC controller

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
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