TPA321

ACTIVE

700-mW, mono, analog input Class-AB audio amplifier

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Data sheet

document-pdfAcrobat TPA321: 350-mW Mono Audio Power Amplifier with Differential Inputs datasheet (Rev. C)

TPA321

ACTIVE

Data sheet

Order now

Product details

Audio input type

Analog Input

Architecture

Class-AB

Speaker channels (max)

Mono

Rating

Catalog

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.5

Load (min) (Ω)

8

Output power (W)

0.35

THD + N at 1 kHz (%)

1

Iq (typ) (mA)

0.7

Control interface

Hardware

Closed/open loop

Closed

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

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.5

Load (min) (Ω)

8

Output power (W)

0.35

THD + N at 1 kHz (%)

1

Iq (typ) (mA)

0.7

Control interface

Hardware

Closed/open loop

Closed

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
- 350 mW at V_DD = 5 V
- 250 mW at V_DD = 3.3 V
Ultralow Supply Current in Shutdown Mode...0.15 µA
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
- 350 mW at V_DD = 5 V
- 250 mW at V_DD = 3.3 V
Ultralow Supply Current in Shutdown Mode...0.15 µA
Thermal and Short-Circuit Protection
Surface-Mount Packaging
- SOIC
- PowerPAD™ MSOP

PowerPAD is a trademark of Texas Instruments.

The TPA321 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 TPA321 can deliver 250-mW of continuous power into a BTL 8- load at less than 1% THD+N throughout voice band frequencies. Although this device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as cellular 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 quiescent current of 0.15 µA during shutdown. The TPA321 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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