IRIRS20921700W single-channel class D audio power amplifier solution

IR’s IRS2092 is a high-voltage high-performance Class-D audio amplifier with integrated PWM modulator and protection. The operating frequency is up to 800kHz, and the rated voltage of ±100 V can provide 500W output power. It is mainly used in home theater, close your stereo system, general purpose audio amplifier, etc. This article introduces the IRS2092 main features, block diagram, typical connection diagram, typical application circuit diagram and 1700W single-channel class D audio power amplifier block diagram, main features, circuit diagram and bill of materials.

The IRS2092 is a high voltage, high performance Class D audio amplifier driver with PWM modulator and protection.

In conjunction with two external MOSFETs and a few external components, a complete Class D audio amplifier with protection can be realized.

International Rectifier’s proprietary noise isolation technology allows high current gate drive stage and high speed low noise error amplifier reside on a single small silicon die.Open elements of PWM modulator section allow flexible PWM topology implementation.

Main features of IRS2092:

• Integrated analog input Class D audio amplifier driver in a small 16 pin package

• Floating inputs enable easy half bridge implementation

• Programmable bidirectional over-current protection with self-reset function

• Programmable preset deadtime for improved THD performances

• Start and stop click noise reduction

• High noise immunity

• ±100 V ratings deliver up to 500 W in output power

• Operates up to 800 kHz

• RoHS compliant

Typical applications of IRS2092:

• Home theater systems

• Mini component stereo systems

• Powered speaker systems

• General purpose audio power amplifiers
IRIRS20921700W single-channel class D audio power amplifier solution
figure 1. IRS2092 block diagram
IRIRS20921700W single-channel class D audio power amplifier solution
figure 2. Typical connection diagram of IRS2092
IRIRS20921700W single-channel class D audio power amplifier solution
image 3. IRS2092 typical application circuit diagram

1700W single-channel class D audio power amplifier

IRAUDAMP9: 1.7 kW / 2-Ω Single Channel Class D Audio Power Amplifier Using the IRS2092S and IRFB4227

The IRAUDAMP9 reference design is a single-channel 1.7-kW ( @ 2Ω load) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IRS2092S Class D audio controller and external gate buffer, to implement protection circuits, and design an optimum PCB layout using the IRFB4227 (x 2 Pairs) TO-220 MOSFETs. This reference design may require additional heatsink or fan for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies for ease of use. The 1-channel design is capable of delivering higher than its rated power with provision of larger heat sink ( Rth <2° C / W).

Main applications of 1700W single-channel class D audio power amplifier:

• Pro-Audio amplifiers

• Powered speakers

• Active Sub-woofers

• PA Systems

• Car audio amplifiers

Musical Instrument amplifier

Main features of 1700W single-channel class D audio power amplifier:

Output Power: 1.7 kW Single channel (2 Ω load, 1kHz, THD+N=10%),

Residual Noise: 290μV, IHF-A weighted, AES-17 filter

Distortion: 0.07% THD+N @ 600W, 2Ω

Efficiency: 97% @ 1.7 kW, 2Ω

Multiple Protection Features: Output Over-current protection (OCP), high side and low side

Input Over-voltage protection (OVP),

Input Under-voltage protection (UVP),

Output DC-offset protection (DCP),

Over-temperature protection (OTP)

PWM Modulator: Self-oscillating half-bridge topology with optional clock synchronization

IRIRS20921700W single-channel class D audio power amplifier solution
Figure 4. Functional block diagram of a 1700W single-channel Class D audio power amplifier
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 5. Outline Drawing of 1700W Single-Channel Class D Audio Power Amplifier

IRIRS20921700W single-channel class D audio power amplifier solution
Figure 5. IRS2092S protection circuit functional block diagram
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 6. 1700W Single Class D Audio Power Amplifier Test Diagram
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 7. 1700W Single-Channel Class D Audio Power Amplifier Circuit Diagram
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 8. 1700W single-channel class D audio power amplifier circuit diagram (1)

IRIRS20921700W single-channel class D audio power amplifier solution
Figure 9. 1700W Single-Channel Class D Audio Power Amplifier Mainboard Input/Output Power Connection Diagram
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 10. 1700W single-channel class D audio power amplifier motherboard circuit diagram (1)
IRIRS20921700W single-channel class D audio power amplifier solution
Figure 9. 1700W Single Class D Audio Power Amplifier Daughter Board Circuit Diagram

IRAUDAMP9 motherboard bill of materials:
IRIRS20921700W single-channel class D audio power amplifier solution
IRIRS20921700W single-channel class D audio power amplifier solution
IRIRS20921700W single-channel class D audio power amplifier solution
IRAUDAMP9 Daughter Board Bill of Materials:
IRIRS20921700W single-channel class D audio power amplifier solution
IRIRS20921700W single-channel class D audio power amplifier solution
IRAUDAMP9 Mechanical Parts List:

For details, see:
http://www.irf.com/product-info/datasheets/data/irs2092.pdf
and
http://www.irf.com/technical-info/refdesigns/iraudamp9.pdf

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