MAX9778ETI+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High-performance, low-power, stereo 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, available in quantities of 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: Up to 1.4W per channel into 8Ω loads
• Total Harmonic Distortion + Noise (THD+N): 0.03% at 1kHz, 1.2W output power
• Efficiency: Up to 88%
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX9778ETI+T features a 28-pin TQFN package with the following pin configuration:

1. VDD
2. GND
3. SD (Shutdown)
4. INL- (Left Channel Negative Input)
5. INL+ (Left Channel Positive Input)
6. BYP (Bypass Capacitor Connection)
7. OUTL (Left Channel Output)
8. PVDD (Power Supply for Class D Amplifier)
9. PGND (Ground for Class D Amplifier)
10. BST (Bootstrap Capacitor Connection)
11. INR+ (Right Channel Positive Input)
12. INR- (Right Channel Negative Input)
13. OUTR (Right Channel Output)
14. VREF (Reference Voltage)
15. AGND (Analog Ground)
16. VCM (Common Mode Voltage)
17. VCLIP (Clip Detector Output)
18. VCLIPGND (Clip Detector Ground)
19. VCLIPH (Clip Detector Supply Voltage)
20. VCLIPREF (Clip Detector Reference Voltage)
21. VCLIPFB (Clip Detector Feedback Voltage)
22. VCLIPIN (Clip Detector Input Voltage)
23. VCLIPRST (Clip Detector Reset)
24. VCLIPFLT (Clip Detector Filter Capacitor Connection)
25. VCLIPFIL (Clip Detector Filter Resistor Connection)
26. VCLIPDIS (Clip Detector Disable)
27. VCLIPEN (Clip Detector Enable)
28. VCLIPVDD (Clip Detector Supply Voltage)

Functional Features

• High-quality audio amplification for stereo applications
• Low-power consumption, suitable for portable devices
• Class D amplifier architecture for improved efficiency
• Shutdown mode for power-saving when not in use
• Clip detector to prevent distortion and protect speakers

Advantages and Disadvantages

Advantages: - High-performance audio amplification - Compact form factor - Low-power consumption - Efficient operation - Built-in clip detector for speaker protection

Disadvantages: - Limited output power compared to larger amplifiers - Requires external components for proper operation

Working Principles

The MAX9778ETI+T is a stereo audio amplifier that utilizes a Class D amplifier architecture. It operates by converting the input audio signal into a high-frequency pulse-width modulated (PWM) signal. This PWM signal is then amplified by the power stage of the IC and filtered to produce the desired audio output.

The amplifier features a shutdown mode, which reduces power consumption when the device is not in use. Additionally, it includes a clip detector that monitors the output signal for distortion and protects the connected speakers from damage.

Detailed Application Field Plans

The MAX9778ETI+T is commonly used in various audio applications, including:

1. Portable audio devices such as smartphones, tablets, and portable media players
2. Headphone amplifiers
3. Home audio systems
4. Automotive audio systems
5. Multimedia speakers

Detailed and Complete Alternative Models

1. MAX9777ETI+T: Similar to MAX9778ETI+T but with a different pin configuration
2. MAX9779ETI+T: Higher output power version of MAX9778ETI+T
3. MAX9780ETI+T: Dual-channel audio amplifier with additional features

These alternative models offer similar functionality and can be considered as alternatives to the MAX9778ETI+T based on specific requirements and design considerations.

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