MAX9702ETI+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, stereo Class D audio amplifier
• Package: 28-pin TQFN (Thin Quad Flat No-Lead) package
• Essence: Provides high-quality audio amplification in a compact form factor
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Power Supply Voltage Range: 4.5V to 14V
• Output Power: Up to 2 x 20W into 8Ω speakers
• Efficiency: Up to 92%
• Total Harmonic Distortion + Noise (THD+N): <0.1% at 1kHz, 1W output power
• Signal-to-Noise Ratio (SNR): >100dB
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX9702ETI+T has a total of 28 pins. The pin configuration is as follows:

1. SDZ (Shutdown Input)
2. GND (Ground)
3. INL- (Left Channel Negative Input)
4. INL+ (Left Channel Positive Input)
5. VDD (Power Supply)
6. PVDD (Power Supply for Power Stage)
7. BST (Bootstrap Capacitor Connection)
8. OUTL (Left Channel Output)
9. FB (Feedback Input)
10. PGND (Power Ground)
11. AGND (Analog Ground)
12. INR+ (Right Channel Positive Input)
13. INR- (Right Channel Negative Input)
14. SD (Shutdown Output)
15. MUTE (Mute Control Input)
16. BYP (Bypass Capacitor Connection)
17. OUTR (Right Channel Output)
18. NC (No Connection)
19. NC (No Connection)
20. NC (No Connection)
21. NC (No Connection)
22. NC (No Connection)
23. NC (No Connection)
24. NC (No Connection)
25. NC (No Connection)
26. NC (No Connection)
27. NC (No Connection)
28. NC (No Connection)

Functional Features

• High-efficiency Class D amplifier architecture
• Low total harmonic distortion and noise for high-quality audio reproduction
• Shutdown and mute control inputs for power management
• Bypass capacitor connection for improved stability
• Bootstrap capacitor connection for efficient power delivery
• Compact package size for space-constrained applications

Advantages and Disadvantages

Advantages: - High efficiency results in lower power consumption - Compact form factor allows for integration into small devices - Low distortion and noise ensure high-quality audio output - Shutdown and mute control inputs provide power management flexibility

Disadvantages: - Limited output power compared to larger amplifiers - Requires external components for proper operation - Sensitive to electromagnetic interference (EMI) due to high-frequency switching

Working Principles

The MAX9702ETI+T is a stereo Class D audio amplifier that utilizes pulse-width modulation (PWM) to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to drive the connected speakers.

The amplifier operates by rapidly switching the power supply voltage on and off, controlling the duty cycle of the square wave. This allows for efficient power delivery to the speakers, resulting in high efficiency and low power dissipation.

The feedback input (FB) ensures accurate amplification by comparing the output signal with the input signal and adjusting the PWM accordingly. The shutdown input (SDZ) and mute input (MUTE) provide control over the amplifier's power state and audio output.

Detailed Application Field Plans

The MAX9702ETI+T is suitable for a wide range of audio amplification applications, including:

1. Portable Bluetooth speakers
2. Home theater systems
3. Car audio systems
4. Gaming consoles
5. Soundbars
6. Musical instruments

Its compact size and high efficiency make it particularly well-suited for portable and battery-powered devices.

Detailed and Complete Alternative Models

1. MAX9702ETI: Similar to MAX9702ETI+T but without tape and reel packaging.
2. MAX9702EVKIT: Evaluation kit for MAX9702ETI+T, includes all necessary components for testing and development.
3. MAX98357A: Class D audio amplifier with integrated digital-to-analog converter (DAC).
4. TPA3116D2: High-performance Class D audio amplifier with built-in audio processing features.

These alternative models offer similar functionality and can be considered as alternatives to the MAX9702ETI+T based on specific application requirements.

In conclusion, the MAX9702ETI+T is a high-performance stereo Class D audio amplifier that provides efficient and high-quality audio amplification in a compact form factor