L6563H

Overview

The L6563H is a current-mode Power Factor Correction (PFC) controller operating in Transition Mode (TM). It features an internal high-voltage startup circuit, eliminating the need for auxiliary power supplies. Key electrical parameters include a supply voltage range of 10.3V to 22.5V and a switching frequency of 70 kHz. The device operates within a temperature range of -40°C to 150°C and is housed in a 16-pin SO package.

Feature Summary

• Integrates a high-voltage startup source to enhance standby efficiency in systems without auxiliary power supplies.
• Employs a highly linear multiplier with crossover distortion correction to achieve low Total Harmonic Distortion (THD) across wide mains ranges.
• Includes voltage feedforward (1/V² correction) to optimize loop stability and improve line transient response during mains drops or surges.
• Provides comprehensive protection mechanisms including output overvoltage, brown-out detection, feedback disconnection, and boost inductor saturation protection.

Applications

• Power factor correction pre-regulators for AC adapters
• Ballast circuits for lighting applications
• Power supplies for flat-screen displays
• Battery chargers requiring compliance with IEC61000-3-2 regulations

Procurement Notes

Verify the specific package variant (SOIC-16 tube vs. tape & reel) against project requirements. Confirm that the high-voltage startup feature aligns with the system's standby power architecture. Ensure thermal management supports the specified maximum junction temperature. Validate component authenticity through authorized channels to guarantee performance reliability.

Selection Notes

Select the L6563H when transition mode operation offers the optimal balance between efficiency and cost compared to Continuous Conduction Mode (CCM). This controller is suitable for designs where minimizing external components and improving standby efficiency are priorities. It is appropriate for applications requiring robust protection against feedback failures and inductor saturation.

Part Context

The L6563H belongs to STMicroelectronics' family of advanced transition-mode PFC controllers. It shares core functionalities with the L6563S but adds a high-voltage startup capability. This differentiation makes it distinct from standard TM controllers, positioning it specifically for master-stage PFC applications where auxiliary winding availability is limited or undesirable.

Replacement Considerations

The L6563S is a compatible alternative if high-voltage startup is not required. Verify pin compatibility and functional equivalence before substitution. No other direct public substitutes are confirmed in the provided documentation.