Product details

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 4.5 Load (min) (Ω) 4 Output power (W) 2 SNR (dB) 105 THD + N at 1 kHz (%) 0.3 Iq (typ) (mA) 8 Control interface I2C Closed/open loop Closed Analog supply (min) (V) 2.5 Analog supply voltage (max) (V) 5.5 PSRR (dB) 75 Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 4.5 Load (min) (Ω) 4 Output power (W) 2 SNR (dB) 105 THD + N at 1 kHz (%) 0.3 Iq (typ) (mA) 8 Control interface I2C Closed/open loop Closed Analog supply (min) (V) 2.5 Analog supply voltage (max) (V) 5.5 PSRR (dB) 75 Operating temperature range (°C) -40 to 85
HTSSOP (PWP) 24 49.92 mm² 7.8 x 6.4
  • I2C Bus Controllable
  • 2-W/Ch Output Power Into 4- Load
  • Low Supply Current and Shutdown Current
  • Depop Circuitry
  • Digital Volume Control From 20 dB to -60 dB
  • Internal Gain Control, Which Eliminates External Gain-Setting Resistors
  • Fully Differential Input
  • Stereo Input MUX
  • PC-Beep Input
  • Compatible With PC 99 Desktop Line-Out Into 10-k Load
  • Compatible With PC 99 Portable Into 8- Load
  • Surface-Mount Power Packaging 24-Pin TSSOP PowerPAD™

PowerPAD is a trademark of Texas Instruments.

  • I2C Bus Controllable
  • 2-W/Ch Output Power Into 4- Load
  • Low Supply Current and Shutdown Current
  • Depop Circuitry
  • Digital Volume Control From 20 dB to -60 dB
  • Internal Gain Control, Which Eliminates External Gain-Setting Resistors
  • Fully Differential Input
  • Stereo Input MUX
  • PC-Beep Input
  • Compatible With PC 99 Desktop Line-Out Into 10-k Load
  • Compatible With PC 99 Portable Into 8- Load
  • Surface-Mount Power Packaging 24-Pin TSSOP PowerPAD™

PowerPAD is a trademark of Texas Instruments.

The TPA0172 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of delivering 2 W of continuous RMS power per channel into 4- loads. This device utilizes the I2C bus to control its functionality, which minimizes the number of external components needed, simplifies the design, and frees up board space for other features. When driving 1 W into 8- speakers, the TPA0172 has less than 0.2% THD+N from 20 Hz to 20 kHz.

Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in the speakers at power up, power down, and while transitioning in and out of shutdown mode.

The overall gain of the amplifier is controlled digitally by the volume control registers which are programmed via the I2C interface. At power up, the amplifier defaults to -60 dB in BTL mode, or -66 dB in SE mode. There are four registers that contain the gains: left BTL, right BTL, left SE, and right SE. Each register contains six bits, which allows 64 gain steps from -60 dB to 20 dB in 1.25-dB steps, and two bits that mute the amplifier.

The TPA0172 only consumes 6.5 mA of supply current during normal operation. A shutdown mode is included that reduces supply current to less than 15 uA.

The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable on TO-200-type packages. Thermal impedances of approximately 35°C/W are truly realized in multilayer PCB applications. This allows the TPA0172 to operate at full power into 8- loads at ambient temperatures of 85°C.

The TPA0172 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of delivering 2 W of continuous RMS power per channel into 4- loads. This device utilizes the I2C bus to control its functionality, which minimizes the number of external components needed, simplifies the design, and frees up board space for other features. When driving 1 W into 8- speakers, the TPA0172 has less than 0.2% THD+N from 20 Hz to 20 kHz.

Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in the speakers at power up, power down, and while transitioning in and out of shutdown mode.

The overall gain of the amplifier is controlled digitally by the volume control registers which are programmed via the I2C interface. At power up, the amplifier defaults to -60 dB in BTL mode, or -66 dB in SE mode. There are four registers that contain the gains: left BTL, right BTL, left SE, and right SE. Each register contains six bits, which allows 64 gain steps from -60 dB to 20 dB in 1.25-dB steps, and two bits that mute the amplifier.

The TPA0172 only consumes 6.5 mA of supply current during normal operation. A shutdown mode is included that reduces supply current to less than 15 uA.

The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable on TO-200-type packages. Thermal impedances of approximately 35°C/W are truly realized in multilayer PCB applications. This allows the TPA0172 to operate at full power into 8- loads at ambient temperatures of 85°C.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
TPA6017A2 ACTIVE 1.9-W, stereo, analog input Class-AB audio amplifier Lower min load impedance

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet 2-W Stereo Audio Power Amplifier with I2C Bus datasheet (Rev. C) 17 May 2001
User guide TPA0172EVM - User Guide (Rev. A) 01 Mar 2001

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
HTSSOP (PWP) 24 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos