L4981BD013TR

Overview

The L4981BD013TR is a Power Factor Correction (PFC) controller from STMicroelectronics, part of the L4981A series. It utilizes BCD 60II technology to achieve a power factor up to 0.99 with sinusoidal line current consumption. The device operates at a switching frequency of 115 kHz and supports universal input mains voltages between 85V and 265V without requiring line switches. Key electrical parameters include a maximum supply voltage of 19V, a minimum operating voltage of 12V, and a typical start-up supply current of 0.3mA. It functions as an average current mode PWM controller.

Feature Summary

• Line-modulated frequency average current mode operation for optimized input filter size
• Integrated high-current bipolar and DMOS totem pole output gate driver
• Built-in overvoltage and overcurrent protection mechanisms
• Precise 2% on-chip voltage reference available externally

Applications

• High efficiency-mode power supplies with sinusoidal line current consumption
• Universal input mains systems operating between 85V and 265V
• Pre-regulator designs for power factor correction

Procurement Notes

Verify the specific suffix 'D013TR' corresponds to the reel packaging format required for your assembly line. Confirm that the L4981B variant's line-modulated frequency characteristics align with your electromagnetic interference (EMI) filtering strategy compared to fixed-frequency alternatives. Ensure external component selection matches the precision requirements for the line-modulated control loop.

Selection Notes

Select this model when line-modulated frequency operation is preferred to minimize input filter size while maintaining average current mode benefits. It is suitable for applications requiring universal AC input compatibility without manual line switching. Consider the integrated protections and soft-start features to simplify the design of robust PFC pre-regulators.

Part Context

This component belongs to the L4981 family of PFC controllers manufactured by STMicroelectronics. The L4981 series is designed to provide all necessary control functions for designing efficient power supplies. The L4981B variant specifically offers line-modulated frequency operation, distinguishing it from the fixed-frequency L4981A version.

Replacement Considerations

L4981AD013TR: Fixed frequency alternative within the same package.