Class-D chipset provides flexibility for inspired audio designers

Audio engineers new to designing high-power switching circuitry for 50-500W Class-D amplifiers can now choose a chipset solution without compromising performance or design flexibility.

The International Rectifier IRS2092 Class-D controller integrates the error amplifier, PWM comparator, gate-driver and overload-protection functions to provide a proven platform that audio engineers can scale to meet power and performance requirements. When combined with external MOSFETs from IR’s large range of devices optimised for digital audio, the IRS2092 solves the toughest Class-D design challenges while leaving engineers free to customise feedback and output filter design for enhanced performance and differentiation.

The IRS2092 input stage features high noise immunity and wide bandwidth, allowing designers to achieve Total Harmonic Distortion plus Noise as low as 0.005%. A proprietary junction-isolation technique effectively isolates switching noise from the analogue audio input. In addition, the PWM comparator has a short propagation delay, which helps designers when optimising the feedback loop.

The gate driver stage includes dead-time insertion, and is optimised for low pulse-width distortion and close matching for maximum linearity.

Designers can scale the amplifier to the required output power rating through selection of the external output transistors, and by optimising the IRS2092’s internal protection thresholds. Multi-channel designs, such as 5.1 or 7.1 surround sound, are also easily achieved.

 

FEATURES High audio performance Programmable bidirectional over-current protection with self-reset Under-Voltage Lockout (UVLO) protection Programmable preset dead-time Pop and click noise reduction

APPLICATIONS Professional audio equipment Musical instrument amplifiers Active speakers Home theatre High-end consumer audio

 

 

International Rectifier/IRS2092