L6564TD

Overview

The L6564TD is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM). It serves as the compact version of the L6563S, embedding identical driver, reference, and control stages within a 10-pin SSOP package. The device features a highly linear multiplier and a special correction circuit to reduce mains current crossover distortion, ensuring wide-range operation with extremely low Total Harmonic Distortion (THD). Output voltage regulation utilizes a voltage mode error amplifier and an accurate internal reference. Loop stability is optimized via a fast bidirectional input voltage feed-forward function (1/V² correction), which significantly improves line transient response during mains drops and surges.

Feature Summary

• Fast bidirectional input voltage feed-forward for improved line transient response
• Accurate adjustable output overvoltage protection with latched shutdown capability
• Integrated protection against feedback loop disconnection and boost inductor saturation
• AC brownout detection and low start-up current for efficient standby operation

Applications

• PFC pre-regulators for high-end AC-DC adapters and chargers
• Desktop PC, server, and web server power supplies
• SMPS compliant with IEC61000-3-2 or JEITA-MITI standards

Procurement Notes

Verify that the ordering suffix 'TD' corresponds to the specific tube packaging configuration required for your assembly process. Confirm the pinout matches the standard 10-pin SSOP footprint. Ensure the component meets the environmental compliance standards specified in the official datasheet for your target market. Cross-reference the manufacturer's latest documentation to confirm active status and any potential design-in recommendations.

Selection Notes

Select this component for applications requiring transition mode PFC control with a compact form factor. It is suitable for designs needing robust protection features such as brownout detection and inductor saturation handling. Consider the bidirectional feed-forward capability if line transient immunity is critical. Evaluate the total harmonic distortion performance against regulatory requirements like EN61000-3-2. Compare with the L6563S if a larger package is acceptable for thermal management.

Part Context

The L6564TD belongs to STMicroelectronics' family of transition-mode PFC controllers. It shares core functionality with the L6563S but offers a more compact 10-pin SSOP package. This series is designed for medium-power switched-mode power supplies up to 400 W. The device integrates advanced protection mechanisms and precise internal references to simplify design and enhance system reliability in consumer and industrial electronics.

Replacement Considerations

The L6563S is the functional equivalent with a larger package. Other variants include L6564H for high-voltage startup and L6564T/L6564TD for different tape-and-reel or tube options. Verify pin compatibility and thermal characteristics when substituting.