TPA3251 (ACTIVE)

175W Stereo / 350W Mono Ultra-HD, Analog-In Class-D Amplifier

175W Stereo / 350W Mono Ultra-HD, Analog-In Class-D Amplifier - TPA3251
 

Description

TPA3251 is a high performance class-D power amplifier that enables true premium sound quality with class-D efficiency. It features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath™ Ultra-HD). This technology allows ultra low distortion across the audio band and superior audio quality. The device can drive up to 2 x 175 W into 4-Ω load and 2 x 220 W into 3-Ω load and features a 2 VRMS analog input interface that works seamlessly with high performance DACs such as TI’s PCM5242. In addition to excellent audio performance, TPA3251 achieves both high power efficiency and very low power stage idle losses below 1 W. This is achieved through the use of 60 mΩ MOSFETs and an optimized gate driver scheme that achieves significantly lower idle losses than typical discrete implementations.

Features

  • Differential Analog Inputs
  • Total Output Power at 10%THD+N
    • 175-W Stereo into 4 Ω in BTL Configuration
    • 220-W Stereo into 3 Ω in BTL Configuration
    • 350-W Mono into 2 Ω in PBTL Configuration
  • Total Output Power at 1%THD+N
    • 140-W Stereo into 4 Ω in BTL Configuration
    • 175-W Stereo into 3 Ω in BTL Configuration
    • 285-W Mono into 2 Ω in PBTL Configuration
  • Advanced Integrated Feedback Design with High-
    speed Gate Driver Error Correction
    (PurePath Ultra-HD)
    • Signal Bandwidth up to 100 kHz for High
      Frequency Content From HD Sources
    • Ultra Low 0.005% THD+N at 1 W into 4 Ω and
      <0.01% THD+N to Clipping
    • 60 dB PSRR (BTL, No Input Signal)
    • <60 µV (A-Weighted) Output Noise
    • >111 dB (A Weighted) SNR
  • Multiple Configurations Possible:
    • Stereo, Mono, 2.1 and 4xSE
  • Click and Pop Free Startup and Stop
  • 90% Efficient Class-D Operation (4 Ω)
  • Wide 12-V to 36-V Supply Voltage Operation
  • Self-Protection Design (Including Undervoltage,
    Overtemperature, Clipping, and Short Circuit
    Protection) With Error Reporting
  • EMI Compliant When Used With Recommended
    System Design

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Parametrics Compare all products in Speaker Amps

 
Audio Input Type
Architecture
Speaker Channels (Max)
Power Stage Supply (Min) (V)
Power Stage Supply (Max) (V)
Output Power (W)
Load (Min) (ohms)
SNR (dB)
THD + N @ 1 kHz (%)
Iq (Typ) (mA)
Control Interface
Closed/Open Loop
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Power to Parallel Bridge Tied Load (Max) (W)
PSRR (dB)
Operating Temperature Range (C)
TPA3251 TPA3220 TPA3221 TPA3244 TPA3245 TPA3250 TPA3255
Analog Input    Analog Input    Analog Input    Analog Input    Analog Input    Analog Input    Analog Input   
Class-D    Class-D    Class-D    Class-D    Class-D    Class-D    Class-D   
4    Stereo    Stereo    4    4    4    4   
12    7    7    12    12    12    18   
36    30    30    30    30    36    53.5   
175    100    100    100    115    130    315   
1.5    1    1    1.5    1.5    1.5    4   
111    108    108    110    112    110    112   
0.005    0.02    0.02    0.005    0.005    0.005    0.006   
12.5      15    15    15    12.5    24   
Hardware    Hardware    Hardware    Hardware    Hardware    Hardware    Hardware   
Closed    Closed    Closed    Closed    Closed    Closed    Closed   
10.8    5    5    10.8    10.8    10.8    10.8   
13.2    30    30    13.2    13.2    13.2    13.2   
355    200    200    160    230    189    600   
80    60    60    60    60    60    80   
0 to 70    -40 to 85    -40 to 85    0 to 70    0 to 70    0 to 70    0 to 70