Efficient Shielded 150 Digital Amplifier Inductor for Stable Class D Power

The "150" Series Digital Power Amplifier Inductor, representing a precisely tuned 15µH inductance value, is a specialized energy-storage and filtering component engineered for the output stage of modern Class D audio systems. As the world transitions toward high-efficiency digital amplification, the Low Pass Filter (LPF) has become the most critical factor in determining final sound quality.

This specific model features a unique "Dual-Inductor" THT (Through-Hole Technology) package, which integrates two high-performance inductors into a single, compact footprint. This is invaluable for designers of stereo or multi-channel audio modules, as it significantly reduces PCB real estate and ensures perfect electrical symmetry between audio channels.

• High-Fidelity Signal Reconstruction: Tuned for Class D amplifier output filters, providing flat frequency response across 20Hz-20kHz with minimal phase shift
• Total Magnetic Shielding: Closed-loop ferrite housing prevents crosstalk between audio channels and eliminates noise radiation
• Massive Saturation Current Capacity: Maintains stable inductance during musical transients and bass peaks, preventing audible clipping
• Ultra-Low DC Resistance (DCR): High-purity oxygen-free copper wire minimizes heat generation and power loss
• Integrated Dual-Core Design: 4-pin THT configuration provides two matched inductors for consistent stereo performance
• Acoustic Damping and Silence: Vacuum impregnation process eliminates physical vibrations and switching noise
• Exceptional Thermal Resilience: Rated for continuous operation in high-heat industrial and automotive environments

The technical profile of the 15µH (150) audio inductor reflects its robustness. The following table provides foundational performance ranges for our high-precision audio series, fully customizable based on specific output wattage and load impedance requirements.

For audio system designers, the Saturation Current (Isat) is the most vital metric. If the inductor saturates during loud musical passages, inductance drops, causing increased ripple current and total harmonic distortion (THD). Our audio-grade cores provide a "soft saturation" curve that ensures amplifier clarity even at peak volume.

The Low DCR (DC Resistance) is achieved through proprietary winding tension control and high-cross-section copper, ensuring the inductor doesn't act as a power-draining resistor. The Inductance Symmetry of less than 2% variance between internal cores is critical for high-end stereo imaging, preventing phase imbalances and soundstage shifts.

The Working Temperature Range of -40°C to +125°C makes this series ideal for high-power car audio systems. Every unit is verified using advanced Automatic Test Equipment (ATE), ensuring consistent parameters across every batch.

Unlike traditional open-frame inductors that radiate magnetic noise, the "150" series uses a complete ferrite enclosure. This is essential for audio applications where high-gain circuits are sensitive to interference. By containing magnetic flux within the component, we ensure the inductor doesn't inject "digital hash" into the analog signal path.

The inductor utilizes two identical vertical windings on a shared base. High-precision CNC winding machines monitor wire tension in real-time, preventing "wire crossing" and ensuring perfect layer alignment. We exclusively use high-purity, oxygen-free copper (OFC) for the lowest possible resistive skin-effect at high frequencies.

The vacuum varnish cycle pulls all air pockets from winding layers and replaces them with high-grade dielectric resin. This process is particularly important for audio components because magnetostriction can create audible "buzzing" or "whining" sounds. Our potting ensures the inductor remains silent even under highest loads.

We utilize high-resolution cameras to verify pin alignment and marking clarity, followed by full 100% electrical sweep of every unit under load. This reduces clients' "Total Cost of Ownership" (TCO) by eliminating incoming inspection failures and field returns.

This inductor is the primary choice for output filters of integrated amplifiers, AV receivers, and active subwoofers. Its compact dual-channel design allows creation of multi-channel systems that fit on standard bookshelves without overheating.

The 150 series is prized for ruggedness and space efficiency in electric vehicles and luxury sedans. Robust isolation and thermal stability ensure sound systems remain clear and protected from engine noise and alternator spikes.

Studio monitors and active stage speakers rely on the 150 series for accuracy and low noise floor. Silent operation and low distortion ensure the power stage doesn't inject color into monitor response.

The 150 series provides stable audio filtering for high-quality smart speakers and soundbars. The dual-channel inductor enables sleek, battery-powered soundbars that deliver impressive bass and clear vocals while maximizing battery life.

Chipsen Electronics is a professional manufacturer specializing in high-performance transformers and magnetic components, with more than 26 years of manufacturing expertise. Founded in 2000, Chipsen now operates 4 production bases covering over 7,200 square meters with 400+ skilled employees.

We hold authoritative certifications including ISO9001, ISO14001 and IATF16949. Our products are approved by UL Class B/F/H, CQC, RoHS and REACH. We have obtained 36+ utility patents, supported by our robust in-house R&D team.

• Full Service Customization: Rapid design support within 24-48 hours based on your specifications
• Extensive Product Portfolio: 200+ product types including transformers, inductors, filters, and common mode chokes
• Advanced Manufacturing Capability: Automated winding and assembly machines improving efficiency by 8x
• Strict Quality Control: 100% testing procedures including electrical performance and reliability tests
• High Voltage & High Frequency Expertise: Specialized in 5KV to 40KV transformers and high-frequency power solutions
• Flexible MOQ & Fast Lead Time: Support from prototype to bulk production with 7-15 day lead times
• Competitive Factory Direct Pricing