The EVAL_MA5302MS_200x2 evaluation board is a two-channel, 200 W/ch (2 Ω at ±28.5 V; with heatsink) halfbridge class D audio power amplifier for Hi-Fi audio systems. This evaluation board demonstrates how to use MA5302MS IC, implement protection circuits, and design an optimum PCB layout using Infineon integrated Class D IC.
（Image source: Infineon）
The EVAL_MA5302MS_200Wx2 features a two-channel self-oscillating type PWM modulator for the lowest component count, highest performance, and robust design, including CODACA power inductor CPD2315-100M and CPD1715F-100M, which are designed with low loss Mn-Zn ferrite core to offer exceptional linearity of the inductor concerning load current and voltage.
Figure 1 Simplified block diagram of class D amplifier （Image source: Infineon）
CODACA Class D Inductor Parameters
Figure 2 Saturation Current vs Temperature Rise Current Curve
Optimized Sound Quality with Good Inductance Linearity
Our high current power inductors, the CPD2315-100M and CPD1715F-100M, are pivotal in achieving unparalleled sound clarity and fidelity in the Infineon reference design. These inductors are engineered to ensure low output resistance while maintaining high linearity relative to the load current and voltage. This meticulous design translates to a pristine audio experience, free from distortion and coloration, allowing the true essence of the music to shine through. The following text will show you the test results.
Audio performance testing
1.Power vs. THD+N
Test conditions: Vbus = ± 28.5 V,Input signal = 1 kHz,Load impedance = 2 Ω,FPWM = 400 kHz.
Figure 3 Power vs. THD+N 2 Ω load. （Image source: Infineon）
2.Frequency response
Test conditions: Vbus = ± 28.5 V ,Output power = 1 W Load impedance = 2 Ω ,FPWM = 400 kHz.
Figure 4 Frequency response 2 Ω load . （Image source: Infineon）
Reduced Noise for Pure Audio Enjoyment
Noise reduction is a critical aspect of high-quality audio systems. The CODACA inductors in the Infineon reference design play a crucial role in minimizing noise, ensuring that your audio output is as clean as it is powerful. Whether it's the subtle nuances in a classical piece or the dynamic range in a rock anthem, our inductors help preserve the integrity of the original sound.
3.Noise floor
Test conditions: Vbus = ±28.5 V,No input signal Load impedance = 2 Ω,FPWM = 400 kHz
Figure 5. Noise floor 2 Ω load. （Image source: Infineon）
4.Noise floor with 1 VRMS output
Test conditions:Vbus = ±28.5 V,Output = 1 VRMS at 1 kHz Load impedance = 2 Ω,FPWM = 400 kHz.
Figure 6 Noise floor with 1 VRMS output 2 Ω load. （Image source: Infineon）
Unmatched Efficiency for Sustainable Performance
Efficiency is at the heart of modern audio system design, not only to conserve energy but also to minimize heat generation for longer component life. Our inductors contribute to a significantly higher efficiency within the Infineon amplifier design, ensuring that your audio systems are both powerful and eco-friendly. This efficiency does not come at the expense of power; on the contrary, our inductors facilitate greater output power, enabling your designs to deliver robust audio performance without compromise.
1.Efficiency
Test conditions:Vbus = ±28.5 V,Frequency = 1 kHz Load impedance = 2Ω x 2,FPWM = 400 kHz.
Figure 7 EVAL_MA5302MS_200X2 2 Ω load stereo, ±B supply = ±28.5 V. （Image source: Infineon）
Customization Magnetic Component
We understand that every design has its unique challenges and requirements. Our R&D team at is ready to support your specific needs, offering customization options for inductors to fit seamlessly into your projects. With CODACA inductors integrated into Infineon's reference design, you can expect a solution that is not only high-performing but also tailored to your specifications.
As one of leading global supplier of magnetic component technology, CODACA continues to improve the perfermence of class D power inductor technology through cooperation with well-known semiconductor companies. In order to meet the design requirements of small size, high power, low radiation, and low distortion, CODACA has designed and developed multiple series of digital power amplifier inductors, such as CPD series, CSD series, CPE series, CSAD series, VSAD series, etc. have been applied in the design of various D class high-power amplifier schemes.
We are eager to see how our advanced inductors can transform your next audio project with Infineon. If you're interested in exploring this further or have any technical inquiries, please don't hesitate to get in touch www.codaca.com or info@codaca.com.
Our team is here to provide you with detailed information and support to ensure your designs set new standards in the audio industry.