L6563STR

Overview

The L6563STR is a transition-mode PFC controller from STMicroelectronics, housed in a 14-SOIC surface-mount package. It operates within a supply voltage range of 10.3V to 22.5V and supports temperatures from -25°C to 125°C. Key electrical parameters include a startup current of 90 µA, running current of ≤5 mA, and a reference accuracy of 1.5% at 25°C. The device features a highly linear multiplier for low THD, voltage feedforward (1/V² correction), and an internal error amplifier. Protection mechanisms include two-step OVP, brown-out detection, feedback disconnection, and boost inductor saturation protection.

Feature Summary

• Transition-mode operation with highly linear multiplier for low total harmonic distortion
• Voltage feedforward function for improved stability during mains changes
• Integrated boost inductor saturation protection
• Interface capability with downstream PWM controllers for system synchronization

Applications

• PFC pre-regulators for AC-DC power supplies
• High-end portable computer power adapters
• Systems requiring compliance with Energy Star and Blue Angel standards
• Two-stage SMPS architectures

Procurement Notes

Verify the specific suffix 'STR' corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the 14-SOIC footprint matches the target PCB design. Ensure the operating temperature range aligns with the final application environment. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component for applications requiring enhanced transition-mode performance with integrated saturation protection. It is suitable for designs needing precise output voltage regulation via internal references. Consider the interface pins if coordination with secondary DC-DC converters is necessary for energy-saving modes or fault handling.

Part Context

This part belongs to the L6563 family of advanced transition-mode PFC controllers. The 'S' variant distinguishes itself from the 'H' series by offering specific interface capabilities and saturation protection features not present in all family members. It is designed to improve efficiency and reduce electromagnetic interference in offline switching converters.

Replacement Considerations

The L6563HTR serves as a related alternative within the same family, featuring high-voltage start-up capabilities. However, it utilizes a 16-pin SOIC package and lacks the specific saturation protection found in the L6563S. Direct substitution requires verifying package compatibility and functional differences.