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1.75-W 3-Channel Stereo Audio Power Amplifier

Qty Price
1-9 $2.97
10-24 $2.68
25-99 $2.49
100-249 $2.18
250-499 $2.05
500-749 $1.74
750-999 $1.47
1000+ $1.40


  • Desktop Computer Amplifier Solution
    • 1.75-W Bridge Tied Load (BTL) Center Channel
    • 500-mW L/R Single-Ended Channels
  • Low Distortion Output
    • < 0.05% THD+N at Full Power
  • Full 3.3-V and 5-V Specifications
  • Surface-Mount Power Package
    24-Pin TSSOP
  • L/R Input MUX Feature
  • Shutdown Control...IDD = 5 uA

    PowerPAD is a trademark of Texas Instruments Incorporated.

Texas Instruments  TPA0103PWPR

The TPA0103 is a 3-channel audio power amplifier in a 24-pin TSSOP thermal package primarily targeted at desktop PC or notebook applications. The left/right (L/R) channel outputs are single ended (SE) and capable of delivering 500 mW of continuous RMS power per channel into 4- loads with a 3.3-V supply voltage.

Amplifier gain is externally configured by means of two resistors per input channel and does not require external compensation for settings of 1 to 10. A two channel input MUX circuit is integrated on the L/R channel inputs to allow two sets of stereo inputs to the amplifier. In the typical application, the center channel amplifier is driven from a mix of the L/R inputs to produce a monaural representation of the stereo signal. The center channel amplifier can be shut down independently of the L/R output for speaker muting in headphone applications. The TPA0103 also features a full shutdown function for power sensitive applications holding the bias current to 5 uA.

The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only in TO-220-type packages. Thermal impedances of less than 35°C/W are readily realized in multilayer PCB applications. This allows the TPA0103 to operate at full power at ambient temperature of up to 85°C.