HC2618A AC-DC Secondary PWM Controller 18W SOP-8 | Output OVP Protection | HCW-HENGCHENGWEI

The HCW-HENGCHENGWEI AC-DC PWM controller IC series provides a comprehensive range of primary-side and secondary-side control solutions for high-efficiency offline power supplies. Designed for flyback power architectures, these controllers support a wide range of applications from low-power adapters to high-performance fast charging systems.

The primary-side PWM controller ICs feature advanced control techniques including high-frequency switching, low standby power consumption, and reduced external component requirements, enabling compact and cost-effective power supply designs. Many models support full voltage input operation, dual-winding transformer configurations, and minimal BOM designs, making them ideal for efficient adapter and charger applications.

The secondary-side PWM controller series enhances system performance through constant power control, precise current limiting, output over-voltage protection (OVP), and high-frequency operation, ensuring stable output regulation and improved safety. Select models offer pin-to-pin compatibility with industry-standard ICs, allowing easy replacement and design upgrades.

Advanced variants include high-frequency control, cable compensation, integrated protection features, and support for adapter and fast charging applications, ensuring reliable operation under dynamic load conditions.

Available in SOP, DIP, ESOP, and QFN packages, these ICs provide flexible integration for a wide range of compact power designs.

This series is ideal for AC-DC adapters, USB chargers, LED drivers, consumer electronics power supplies, and industrial power modules, delivering high efficiency, reliability, and optimized performance.

Key Features (Series Highlights):

• Primary-side and secondary-side PWM control solutions
• Wide power range: low power to 30W+ applications
• Full voltage input support (select models)
• Reduced or minimal external components
• Dual-winding transformer support
• Constant power and precision current limiting
• Output OVP and protection features
• High-frequency operation for compact design
• Pin-to-pin compatible replacement options
• Multiple package options: SOP, DIP, ESOP, QFN

Applications:

• AC-DC power adapters
• USB chargers and fast charging systems
• Flyback SMPS designs
• LED drivers
• Consumer electronics power supplies
• Industrial AC-DC converters
• Smart home and IoT devices
• Compact offline power modules