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TPA321DGNR from TI,Texas Instruments

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TPA321DGNR

Manufacturer: TI

350-mW Low-Voltage Audio Power Amp with differential inputs
Partnumber Manufacturer Quantity Availability
TPA321DGNR TI 1451 In Stock

Description and Introduction

350-mW Low-Voltage Audio Power Amp with differential inputs The TPA321DGNR is a Class-D audio amplifier manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Output Power:** 20W per channel into 4Ω at 10% THD+N (with 12V supply)  
- **Supply Voltage Range:** 4.5V to 14V  
- **Efficiency:** Up to 90%  
- **THD+N (Total Harmonic Distortion + Noise):** 0.1% (typical)  
- **Signal-to-Noise Ratio (SNR):** 100dB (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-pin MSOP PowerPAD™ (DGNR)  

### **Descriptions:**  
The TPA321DGNR is a stereo Class-D audio amplifier designed for efficient power delivery in portable and battery-powered applications. It features a differential input and integrates protection circuits such as thermal shutdown and overcurrent protection.  

### **Features:**  
- **Class-D Operation:** High efficiency with minimal heat dissipation  
- **Differential Inputs:** Reduces noise pickup  
- **Pop-and-Click Suppression:** Minimizes audible noise during power-up/down  
- **Thermal and Short-Circuit Protection:** Enhances reliability  
- **Low Quiescent Current:** Extends battery life in portable applications  
- **Small Footprint:** Suitable for space-constrained designs  

This amplifier is commonly used in applications like portable speakers, LCD TVs, and gaming systems.  

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Application Scenarios & Design Considerations

350-mW Low-Voltage Audio Power Amp with differential inputs

Alternative Part Number

  • LMV321IDBVR --: Low-voltage rail-to-rail op-amp in SOT-23-5 with similar bandwidth and supply range, pin-compatible in many designs and widely available.
  • MAX4291EUK+T --: Low-power rail-to-rail CMOS op-amp in SOT-23-5 offering comparable gain-bandwidth and supply current, suitable as a functional drop-in.
  • OPA340NA/3K --: Rail-to-rail CMOS op-amp in SOT-23-5 with similar low-voltage operation and low quiescent current, good alternative when slightly higher bandwidth is acceptable.
  • LM4871MM --: Similar low-voltage audio power amplifier in an MSOP package with comparable output power and pin function, suitable drop-in for many designs.
  • PAM8302AAS --: Class-D audio amplifier with similar supply range and output power, commonly used as a cost-effective alternative in portable audio designs.
  • MAX9710EUA --: Low-voltage audio power amplifier offering comparable gain and output capability, usable as a functional substitute with layout adjustments.

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