L6564D

Overview

The L6564D is a current mode Power Factor Correction (PFC) controller operating in Transition Mode (TM). It integrates driver, reference, and control stages within a compact 10-pin SSOP package. Key electrical parameters include a supply voltage range of 10.3V to 22.5V, an operating temperature range of -25°C to 125°C, and a startup current of 90 µA. The device features a highly linear multiplier with special correction circuitry to reduce mains current crossover distortion, ensuring low Total Harmonic Distortion (THD) across wide load ranges.

Feature Summary

• Integrates a highly linear multiplier with specialized correction circuits to minimize mains current crossover distortion for improved power quality.
• Features fast bidirectional input voltage feed-forward using proprietary 1/V² correction to enhance line transient response during voltage drops or surges.
• Includes comprehensive protection mechanisms such as output overvoltage control, feedback loop disconnection detection, AC brownout detection, and boost inductor saturation protection.

Applications

• Power factor correction pre-regulators for desktop computer power supplies
• Transition-mode PFC controllers for electronic lamp ballasts
• Power factor correction stages for high-end adapters and flat screen televisions

Procurement Notes

Verify the specific suffix 'D' corresponds to the 10-SSOP tube packaging configuration. Confirm that the component status remains Active for new designs. Ensure compatibility with the required thermal management for the specified operating temperature range. Cross-reference the manufacturer part number against official datasheets to validate pinout and electrical specifications before integration.

Selection Notes

Select this component for applications requiring Transition Mode operation up to moderate power levels where compliance with EN61000-3-2 standards is necessary. The integrated fixed-off-time control capability simplifies design compared to standard TM controllers. Consider the 10-pin SSOP package constraints for PCB layout and thermal dissipation requirements relative to the target power output.

Part Context

The L6564D serves as a compact variant within the L6564 family, embedding the same functional blocks as the larger L6563S device into a smaller footprint. It is designed for systems requiring efficient power factor correction without the complexity of Continuous Conduction Mode controllers. The device supports SMPS designs aiming for high efficiency and regulatory compliance in consumer and industrial electronics.

Replacement Considerations

The L6564H offers similar functionality but includes high-voltage start-up capabilities suitable for systems lacking auxiliary power supplies. Verify if the specific package type or start-up requirements necessitate switching between these variants based on the system architecture.

FAQ

How does the L6564D handle input voltage transients?

It utilizes a fast bidirectional input voltage feed-forward function with 1/V² correction to significantly improve line transient response during both voltage drops and surges.

What protection features are integrated into the L6564D?

The IC provides output overvoltage protection, feedback loop disconnection latched shutdown, AC brownout detection, and boost inductor saturation protection.