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TDA8947J from PHI,Philips

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TDA8947J

Manufacturer: PHI, NXP

BTL: 4 W to 50 W)

Partnumber Manufacturer Quantity Availability
TDA8947J PHI, NXP 266 In Stock

Description and Introduction

BTL: 4 W to 50 W) The TDA8947J is a Class-D audio amplifier manufactured by NXP Semiconductors. Below are its key specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Type:** Class-D Audio Amplifier  
- **Output Power:**  
  - 2 × 7 W (4 Ω, THD = 10%)  
  - 2 × 5 W (8 Ω, THD = 10%)  
- **Supply Voltage Range:** 4.5 V to 18 V  
- **Efficiency:** Up to 90%  
- **THD (Total Harmonic Distortion):** < 0.5% (typical)  
- **Signal-to-Noise Ratio (SNR):** > 70 dB  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** HSOP24 (PowerSO36)  

### **Descriptions:**
- The TDA8947J is a stereo Class-D amplifier designed for efficient audio amplification in consumer electronics.  
- It operates in bridge-tied load (BTL) mode for each channel, eliminating the need for output capacitors.  
- Features built-in protection against short-circuit, over-temperature, and under-voltage conditions.  
- Suitable for battery-powered applications due to low power consumption.  

### **Features:**
- **High Efficiency:** Reduces power dissipation and extends battery life.  
- **Low Standby Current:** < 100 µA (typical) in mute mode.  
- **Pop-Free Operation:** Soft-start and shutdown to avoid audible noise.  
- **Thermal Protection:** Automatic shutdown in case of overheating.  
- **Short-Circuit Proof:** Robust protection for output stages.  
- **Flexible Supply Voltage:** Supports a wide range for various applications.  

This information is strictly based on NXP's official documentation for the TDA8947J.

Application Scenarios & Design Considerations

BTL: 4 W to 50 W)

Alternative Part Number

  • STK433-130 --: Thick-film hybrid audio power amplifier IC with similar multi-channel output capability, commonly used as a substitute in audio amplifier designs.
  • LM4766 --: Dual-channel class-AB audio power amplifier offering comparable output power and supply range, suitable for similar audio applications.
  • TDA7294 --: Popular DMOS audio power amplifier IC with similar voltage and power ratings, widely available and often used in comparable amplifier circuits.

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