Reference design/Evaluation board - Single-ended, 2-channel CoolGaN™ class D amplifier for premium audio applications
The EVAL_AUDAMP24 e-mode GaN HEMT-based evaluation board is a 2-channel, 225W/ch (4Ω at ±43V) or 250 W/ch( 8Ω at ±63V) half-bridge class D audio power amplifier for high-end Hi-Fi audio systems. This evaluation board demonstrates how to use the IGT40R070D1 E8220 CoolGaN™ gallium nitride transistor together with the MERUS™ IRS20957SPBF controller IC, implement protection circuits, and design an optimum PCB layout. The reference design provides all the required housekeeping power supplies for ease of use. The 2-channel design is scalable for power and the number of channels.
Summary of Features
Output power:
225W x 2 channels (1% THD+N, 4Ω at ±43V)
250W x 2 channels (1% THD+N, 8Ω at ±63V)
Multiple protection features:
Overcurrent protection (OCP), high- and low-side e-mode GaN transistors
Overvoltage protection (OVP)
Undervoltage protection (UVP), high- and low-side e-mode GaN transistors
Overtemperature protection (OTP)
PWM modulator: Self-oscillating half-bridge topology with optional clock synchronization
Benefits
Clean switching performance
Narrow deadtime for better THD
Easy to use: compatible with the MERUS™ IRS20957SPBF class D controller
Outstanding audio quality
High reliability
Potential Applications
Hi-Fi amplifiers
AV receivers
Home theater systems
Powered speakers
Musical instrument amplifiers
List of components:
400V CoolGaN™ e-mode HEMT (IGT40R070D1 E8220)
MERUS™ - Protected digital audio driver (IRS20957SPBF)
Please be aware of the errata sheet.
Reference design/Evaluation board - Single-ended, 2-channel CoolGaN™ class D amplifier for premium audio applications
The EVAL_AUDAMP24 e-mode GaN HEMT-based evaluation board is a 2-channel, 225W/ch (4Ω at ±43V) or 250 W/ch( 8Ω at ±63V) half-bridge class D audio power amplifier for high-end Hi-Fi audio systems. This evaluation board demonstrates how to use the IGT40R070D1 E8220 CoolGaN™ gallium nitride transistor together with the MERUS™ IRS20957SPBF controller IC, implement protection circuits, and design an optimum PCB layout. The reference design provides all the required housekeeping power supplies for ease of use. The 2-channel design is scalable for power and the number of channels.
Summary of Features
- Output power:
- 225W x 2 channels (1% THD+N, 4Ω at ±43V)
- 250W x 2 channels (1% THD+N, 8Ω at ±63V)
- Multiple protection features:
- Overcurrent protection (OCP), high- and low-side e-mode GaN transistors
- Overvoltage protection (OVP)
- Undervoltage protection (UVP), high- and low-side e-mode GaN transistors
- Overtemperature protection (OTP)
- PWM modulator: Self-oscillating half-bridge topology with optional clock synchronization
Benefits
- Clean switching performance
- Narrow deadtime for better THD
- Easy to use: compatible with the MERUS™ IRS20957SPBF class D controller
- Outstanding audio quality
- High reliability
Potential Applications
- Hi-Fi amplifiers
- AV receivers
- Home theater systems
- Powered speakers
- Musical instrument amplifiers
List of components:
- 400V CoolGaN™ e-mode HEMT
(IGT40R070D1 E8220)
- MERUS™ - Protected digital audio driver
(IRS20957SPBF)
Please be aware of the errata sheet.
