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Low Power (≤30W per channel)

2 x 25Watt Class D Audio Amplifier Board - TPA3123[144]

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It is a stereo Class D audio amplifier board with a Texas Instruments TPA3123 chip to achieve high efficiency up to 95%. Each channel is capable of delivering outputting nominal power simultaneously and continuously. Its excellent self-dissipation eliminates the need for an external heatsink. The module dissipates only 0.8W with no signal when in ON mode (around 0.16W when in stand-by). Its reliability and longevity is ensured by a variety of protection including over current protection, short-circuit protection and over temperature protection. Excellent design of the power ports allows you to connect multiple amplifier boards in series (Terminal Block Optional).

  • StyleBoards
  • Number Of Channel(s)2
  • Output Power25
  • Size3.6 x 2.7 inches (91.44mm x 68.58mm)
  • ChipsetTPA31xx
  • Heat DissipationNo Heat Sink & FAN
  • Supported Parallel Bridge Tied Load ModeNO
  • inputSingle ended Line-in,
  • Power Voltage10V-27V
  • Output Power
  • 25W@4Ohm 27V DC THD+N 10%
  • 19W@4Ohm 27V DC THD+N 1%
  • Power Indicator
  • Heat Dissipation through PCB Copper
  • Over current Protection
  • Over temperature Protection
  • 4-screw Easy Installation
  • Weight: 167g/ 0.37 lbs (±10%)
  • Size: 3.60 x 2.70 x 0.65 inches
ParameterConditionsMin.Typ. Max.Units
Power Supply-102730VDC
Idle PowerSD Floating-0.81.6W
Standby PowerSD Connected to GND-0.160.4W
Maximum Current 50W @ 4Ohm -2-A
Efficiency25W @ 4Ohm 90-95%
Minimum Load Impedance--3.2-Ω
Switching FrequencySD Floating- 250-KHz
Input Sensitivity(RMS)@4Ω, 25W, 1KHz-635-mV
Input Impedance--22-
Output Power@4Ω THD+N 1%    -19-W
@4Ω THD+N 10%-25-W
Bandwidth @ ±3dB@4Ω20-20K   Hz
THD@4Ω, 1W, 1KHz-0.02-%
@4Ω, 10W, 1KHz-0.06-%
Output Noise LevelA-weighting,Input Connected to GND       -103.68-µV
SNR19W @4Ω THD+N 1%-91-dB






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