STMicroelectronics L4983 CCM PFC Boost Controller

STMicroelectronics L4983 Continuous Conduction Mode (CCM) Power Factor Correction (PFC) Boost Controller includes a proprietary multiplier “emulator”. This feature, in combination with innovative THD optimizers, ensures very low Total Harmonic Distortion (THD) performance under all operating conditions. The device comes in a pin SO package and offers a high-performance, low-component-count solution for CCM-operated boost PFC pre-regulators in EN61000-3-2 and JEIDA-MITI-compliant applications, spanning a power range from a few hundred W to some kW.

The STMicroelectronics L4983, thanks to a proprietary off-time modulator, operates at a quasi-fixed frequency across all operating conditions. Two options are available, 65kHz for A and 130kHz for B. The device features low power consumption and disable functions, allowing use in applications that comply with even the current energy-saving requirements issued by Energy Star, the Department of Energy (DoE) in the United States, the European Code of Conduct, the European Union’s Ecodesign Directive, and other guidelines.

In addition to an overvoltage protection able to keep the output voltage under control during transient conditions, the IC is also provided with protection against feedback loop failures or boost inductor saturation and erroneous settings. Soft-start limits the peak current. The totem-pole output stage, capable of 0.7A source and 1.5A sink current, is suitable for big MOSFET or IGBT drives.

Features

Peak current mode CCM-operated
Proprietary multiplier “emulator” with minimum THD of line current in all operating conditions (CCM and DCM)
Extremely few external components
Protections
- Feedback loop failure
- OVP
- OCP
- Inductor saturation

Inductor current sense
Disable and low consumption function
In-rush current monitoring
Soft-start for smooth startup
1.2% (at T_j = 25°C) internal reference voltage
65kHz (A version) and 130kHz (B version) switching frequency
SO-8 package

Applications

PFC pre-regulators for:
- IEC61000-3-2 and JEIDA-MITI compliant SMPS in excess of 1kW
- Desktop PC, server, web server, game console
- High-power LED luminaries
- Industrial and medical SMPS according to IEC 60601-1-2