Infineon Technologies EVAL_AUDAMP24 Evaluation Board

Infineon EVAL_AUDAMP24 Evaluation Board is a two-channel, 225W/ch (4Ω at ±43V) or 250W/ch (8Ω at ±63V) half-bridge class D audio power amplifier for Hi-Fi audio systems. The EVAL_AUDAMP24 Board demonstrates how to use the CoolGaN™ gallium nitride transistor, IRS20957S controller IC, implement protection circuits, and design an optimum PCB layout. This optimum layout implements the IGT40R070D1 E8220, 400V CoolGaN e-mode HEMT.

The two-channel design is scalable for power and the number of channels. The reference design provides ease of use, including all required housekeeping power supplies.

Features

Output power:
- 225W x 2 channels (1 percent THD+N, 4Ω at ±43V)
- 250W x 2 channels (1 percent THD+N, 8Ω at ±63V)
Multiple protection features:
- Over-Current Protection (OCP), high-side and low-side CoolGaN™ transistors
- Over-Voltage Protection (OVP)
- Under-Voltage Protection (UVP), high-side and low-side CoolGaN™ transistors
- Over-Temperature Protection (OTP)
PWM modulator:
- Self-oscillating half-bridge topology with optional clock synchronization

Applications

Hi-Fi amplifiers
AV receivers
Home theater systems

Powered speakers
Musical instrument amplifiers

Topology

The EVAL_AUDAMP24 self-oscillating topology consists of the following essential functional blocks:
• Front-end integrator
• PWM comparator
• Level shifters
• Gate drivers and CoolGaN™ HEMTs
• Output LPF

Overview

Infineon Technologies EVAL_AUDAMP24 Evaluation Board

Typical connections

Application Circuit Diagram - Infineon Technologies EVAL_AUDAMP24 Evaluation Board

Block Diagram of class D Amplifier

Block Diagram - Infineon Technologies EVAL_AUDAMP24 Evaluation Board

Infineon Power and Sensing Selection Guide