TPA731

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700-mW, mono, analog input Class-AB audio amplifier with differential inputs

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Data sheet

document-pdfAcrobat 700-mW Mono Low-Voltage Audio Power Amplifier with Differential Inputs datasheet (Rev. B)

TPA731

ACTIVE

Data sheet

Order now

Product details

Audio input type

Analog Input

Architecture

Class-AB

Speaker channels (max)

Mono

Rating

Catalog

Load (min) (Ω)

8

Output power (W)

0.7

THD + N at 1 kHz (%)

0.5

Iq (typ) (mA)

1.55

Control interface

Hardware

Analog supply (min) (V)

2.5

Analog supply voltage (max) (V)

5.5

PSRR (dB)

85

Operating temperature range (°C)

-40 to 85

Audio input type

Analog Input

Architecture

Class-AB

Speaker channels (max)

Mono

Rating

Catalog

Load (min) (Ω)

8

Output power (W)

0.7

THD + N at 1 kHz (%)

0.5

Iq (typ) (mA)

1.55

Control interface

Hardware

Analog supply (min) (V)

2.5

Analog supply voltage (max) (V)

5.5

PSRR (dB)

85

Operating temperature range (°C)

-40 to 85

HVSSOP (DGN)

8

14.7 mm² 3 x 4.9

SOIC (D)

8

29.4 mm² 4.9 x 6

Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility 2.5 V – 5.5 V
Output Power for R_L = 8
- 700 mW at V_DD = 5 V
- 250 mW at V_DD = 3.3 V
Ultralow Supply Current in Shutdown Mode . . . 1.5 nA
Thermal and Short-Circuit Protection
Surface-Mount Packaging
- SOIC
- PowerPAD™ MSOP

PowerPAD is a trademark of Texas Instruments.

Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility 2.5 V – 5.5 V
Output Power for R_L = 8
- 700 mW at V_DD = 5 V
- 250 mW at V_DD = 3.3 V
Ultralow Supply Current in Shutdown Mode . . . 1.5 nA
Thermal and Short-Circuit Protection
Surface-Mount Packaging
- SOIC
- PowerPAD™ MSOP

PowerPAD is a trademark of Texas Instruments.

The TPA731 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications where internal speakers are required. Operating with a 3.3-V supply, the TPA731 can deliver 250-mW of continuous power into a BTL 8- load at less than 0.6% THD+N throughout voice band frequencies. Although this device is characterized out to 20 kHz, its operation is optimized for narrower band applications such as wireless communications. The BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which is particularly important for small battery-powered equipment. This device features a shutdown mode for power-sensitive applications with a supply current of 1.5 nA during shutdown. The TPA731 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD™ MSOP, which reduces board space by 50% and height by 40%.

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