24 W LED Driver Solution Based on the DK8924AN by DK Semiconductor – Complete Technical Overview

The rapid growth of LED lighting applications demands driver solutions that are increasingly efficient, compact, and reliable. To meet these requirements, DK Semiconductor offers an architecture based on the DK8924AN, a next-generation integrated GaN chip designed for constant-voltage applications with primary-side control.

This solution stands out by delivering a high power factor (PF), low total harmonic distortion (THD), and high operational efficiency, while also integrating a robust set of protection features that ensure safety and stability across a wide range of operating conditions.

Overview of the DK8924AN-Based Solution

The DK8924AN is a GaN power device optimized for isolated LED drivers, integrating multiple functions into a single chip:

• Advanced primary-side control

• Single-stage active power factor correction (PFC)

• Integrated high-voltage startup circuit

• Intelligent THD compensation

• High-precision voltage regulation

• Comprehensive protection mechanisms

By leveraging GaN (Gallium Nitride) technology, this solution delivers superior performance compared to traditional silicon-based devices, providing higher efficiency, lower thermal dissipation, and increased power density.

Key System Features

High Efficiency in Quasi-Resonant Mode

Operation in QR (Quasi-Resonant) mode reduces switching losses while maintaining high efficiency across the full load range. This minimizes heat generation and extends system lifespan.

Single-Stage Active Power Factor Correction

Integrating active PFC into a single stage enables:

• Simplified circuit design

• Reduced external component count

• Power factor above 0.9 at full load

• Significant reduction of harmonic interference

Fast and Reliable Startup

The integrated 650 V startup circuit:

• Reduces standby power consumption

• Improves startup time

• Eliminates the need for external auxiliary circuits

High Constant-Voltage Accuracy (±3%)

Precise output voltage regulation is critical for LED applications that require stability and long component lifetime.

Low Power Consumption and High Stability

• Low startup current

• Low operating current

• Ultra-low standby power consumption

Ideal for meeting international energy efficiency standards.

Application Scenarios

The 24 W DK8924AN-based solution is suitable for a wide range of applications:

• High-power LED strips

• External power supplies

• Smart lighting systems

• Architectural and landscape lighting

• Home automation

• Commercial lighting systems

The wide input voltage range (90–264 Vac) ensures global compatibility and stable operation even in unstable power grids.

Partial Test Results

Standby Power Consumption

The solution demonstrates extremely low no-load power consumption, meeting efficiency standards for modern external power supplies and LED lighting systems.

Average Efficiency

Average efficiency reaches up to 88.91%, a high value for isolated LED drivers with integrated PFC.

Output Voltage Ripple

Ripple measurements were conducted at:

• 90 Vac and 264 Vac

• No-load and full-load conditions

Results show excellent output stability, essential for LED durability.

Voltage Regulation

Tests performed at input voltages of:

• 90 Vac

• 115 Vac

• 230 Vac

• 264 Vac

and loads ranging from 0% to 100% confirm voltage regulation within the specified ±3% range.

THD and Power Factor

THD and PF tests confirm:

• Low THD, compliant with IEC61000-3-2 Class C

• Power factor above 0.9, reducing losses in the electrical grid

EMC Testing (Conducted and Radiated)

The solution successfully passed:

• Conducted EMI tests

• Radiated EMI tests

Meeting regulatory limits and simplifying final product certification.

Conclusion

The 24 W LED driver solution based on the DK8924AN from Dongke Semiconductor delivers a robust set of technical advantages:

• High efficiency

• Low THD

• High power factor

• Low thermal dissipation

• Comprehensive protection features

• Proven reliability for professional applications

Thanks to integrated GaN technology, the DK8924AN stands out as a modern and efficient solution for LED lighting and external power supplies.

Next Steps

If you are interested in implementing this solution in your products, contact our team. We provide:

• Development kits

• Complete documentation

• Reference design files

• Specialized technical support

• Test reports and PCB layouts

We are ready to help your company accelerate development and bring high-quality, energy-efficient products to market.

Dongke Semiconductor appreciates your interest and looks forward to collaborating toward a more efficient and brighter future.

Integration with Grupo Autcomp

At Grupo Autcomp, we continuously work to deliver innovative and reliable technology solutions to the Brazilian market. Our partnership with manufacturers such as Dongke Semiconductor reinforces our commitment to providing high-performance, safe, and energy-efficient products.

If your company is looking for LED drivers, power components, electronic solutions, or complete integration projects, our technical team is ready to support you from component selection to final product development.

👉 Contact Grupo Autcomp to learn how we can integrate the DK8924AN-based solution into your projects and accelerate your time-to-market.

Together, we build high-performance technology for a brighter future.