By continuing to improve audio quality, Class D audio amplifiers are fast becoming the preferred solution for home audio and video systems. International Rectifier has leveraged its advanced high voltage technology to offer high performance MOSFETs and gate driver ICs for Class D audio applications. When combined with our industry-leading device ruggedness, we will enable customers to deliver higher performance audio systems with higher power density and better reliability. Audio Output MOSFETs
IR continues to improve the performance capabilities of Class D audio amplifier by offering the new IRFI4xxxH-117 series of MOSFETs. In addition to low on-state resistance, the series of half-bridge N-channel MOSFETs provide optimized gate charge, body-diode reverse recovery and internal gate resistance to improve key Class D audio amplifier performance parameters such as efficiency, THD and EMI. For example, the IRFI4xxxH-117P features a typical RDS(on) of 48 mOhms for high efficiency, and a typical Qg of 8.9nC and Qsw of 4.3nC for improved THD.
Features at a glance: - Low RDS(on) for higher power density
- Lower gate charge for higher speed
- 175°C capability offers improved reliability
Audio Amplifier MOSFETs
IR continues to improve the performance capabilities of Class D audio amplifier by offering the new DirectFET® MOSFET IRF6665. The DirectFET was developed with optimized characteristics specifically for audio amplifier applications. The small can DirectFET® package enables system benefits such as reduced footprint, improved PCB layout, reduced EMI, and improved thermal characteristics over other plastic package devices. IRF6665, with its improved electrical and thermal characteristics, delivers 100W Pout into 8 mOhms load without a heat sink. Class D audio critical parameter RG(int) has a guaranteed maximum value for improved dead time control. This is an important factor to reduce system THD level. IRF6665 uses IR’s benchmark DirectFET package technology plus the latest MOSFET process to maximize performance in medium power class D audio amplifier applications. The device parameters are tuned specifically for improved audio performance. This innovative solution enables customers to provide high performance audio systems with better reliability and higher amplifier output power. Class D amplifier applications range from battery-powered portable products to high-end professional amplifiers, musical instruments and home multimedia systems. Package Designed Specifically for Power Applications
IRF6665 DirectFET MOSFET has a uniquely simple construction that provides breakthroughs in die-free package resistance and heat dissipation capabilities, increasing efficiency and current carrying capacity of the device in a given footprint for optimal performance.
Audio Gate Driver ICs
Audio Reference Designs
Designing Class D Audio Amplifiers
The International Rectifier IRS20124S, a 200V control IC developed specifically for Class D audio applications, enables audio system manufacturers to safely and efficiently design audio amplifier up to 500W per channel level with better sound quality. Integrated features such as adjustable dead-time generation and bi-directional over-current sensing protect the amplifier system. Also, these features allow audio designers to simplify circuits and minimize component count for Class D audio amplifiers in home theatre entertainment systems, audio-video receivers and automotive sound systems. Turn to the power management experts for high performance Driver ICs and MOSFETs designed specifically for your next generation Class D audio design.
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