STMicroelectronics

L6569AD

L6569AD Description

The L6569AD from STMicroelectronics is a high-voltage half-bridge gate driver IC designed for synchronous power applications. Operating within a 10V to 16.6V supply range, it features two drivers capable of delivering peak output currents of 170mA (source) and 270mA (sink), ensuring robust switching performance for power MOSFETs or IGBTs. The device supports a maximum bootstrap voltage of 600V, making it suitable for high-side driving in demanding power topologies. Packaged in an 8-pin SOIC (Surface Mount), it is optimized for compact designs while maintaining reliability. Although marked as Obsolete, it remains a viable choice for legacy systems due to its ROHS3 compliance and REACH unaffected status.

L6569AD Features

• Synchronous Half-Bridge Driver: Enables precise control of high-side and low-side switches.
• High-Side Voltage Support: Up to 600V bootstrap capability for robust high-voltage applications.
• High Current Drive: 170mA source / 270mA sink ensures fast switching and reduced losses.
• RC Input Circuit: Simplifies interfacing with control logic or PWM signals.
• Wide Supply Range (10V–16.6V): Compatible with standard power rails.
• Surface-Mount Package (8SO): Space-efficient for PCB designs.
• RoHS3 Compliant: Meets environmental standards despite obsolete status.

L6569AD Applications

The L6569AD excels in high-voltage power conversion systems, including:

• Switch-Mode Power Supplies (SMPS): For efficient AC/DC or DC/DC conversion.
• Motor Drives: Driving IGBTs or MOSFETs in brushless DC (BLDC) motor controllers.
• Lighting Systems: High-voltage LED drivers or electronic ballasts.
• Industrial Inverters: Used in solar inverters or UPS systems requiring reliable gate driving.
• Legacy Equipment Maintenance: Suitable for repairs or upgrades in systems where newer alternatives are incompatible.

Conclusion of L6569AD

The L6569AD offers a balance of high-voltage tolerance, efficient drive capability, and compact packaging, making it a dependable choice for synchronous half-bridge topologies. While obsolete, its performance metrics and compliance with environmental standards ensure continued utility in industrial, lighting, and power supply applications. Engineers working with legacy designs or requiring a proven gate driver solution will find the L6569AD a technically sound option.