Audio

Source

And Control

RIGHT

LEFT

TPA3138D2

PLIMIT

MOD_SEL

SD/FAULT

Power Limit

PVCC/AVCC

Power Supply

3.5V t 14.4V

FB

FB

GAIN_SEL

20dB/26dB GAIN Select

PBTL

DETECT

20.50 mm

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPA3138D2

SLOS993A – MARCH 2018 – REVISED JUNE 2018

TPA3138D2 10-W, 3.5-V to 14.4-V, Inductor Free, Stereo Class-D Speaker Amplifier

1

1 Features

1

•

Wide Supply Range 3.5-V to 14.4-V

–

2 × 10 W into 6-Ω, 1% THD+N, 12-V Supply

–

1 x 18.5 W into 4-Ω, 10% THD+N, 12-V Supply

–

THD+N : 0.04% at 1 W, 1 kHz input, 6-Ω

•

Longer Battery Life for Portable Applications:

–

20-mA (12-V) Idle Current in 1SPW Mode

–

>90% Class-D Efficiency

•

Reduced Solution Size and Cost:

–

Inductor-Free Operation

–

EN55013 and EN55022 EMC Compliant When

No Inductors are Used

–

No External Heatsink Required

•

Flexible Audio Solution:

–

Single-ended or Differential Analog Inputs

–

Selectable Gain: 20 dB and 26 dB

–

Pop and Click-Free Startup

•

Integrated Protections and Auto Recovery:

–

Pin-to-pin, Pin-to-Ground, and Pin-to-Power

Short Circuit Protection

–

Thermal Protection, Undervoltage Protection,

and Overvoltage Protection

–

Power Limiter and DC Speaker Protection

•

Pin-to-Pin Compatible with TPA3110D2,

TPA3136D2 and TPA3136AD2

2 Applications

•

Televisions and Monitors

•

•

Audio Amplifiers in Smart Appliance

•

Audio Speakers in Internet of Things

•

Consumer Audio Equipment

3 Description

The TPA3138D2 is a 10-W/ch, high-efficiency, low-

idle-current Class-D stereo audio amplifier. It can

drive stereo speakers with a load as low as 3.2-Ω. In

the 1SPW mode, it consumes a low idle current of

only 21-mA (12-V) and can operate down to 3.5-V,

allowing for longer audio play and improved thermal

performance in bluetooth speakers, battery-powered

appliances and other power-sensitive applications.

Advanced EMI Suppression with Spread Spectrum

Control enables the use of inexpensive ferrite bead

filters while meeting EMC requirements for system

cost reduction.

To further simplify the design, the TPA3138D2

integrates essential protection features including

undervoltage, overvoltage, power limit, short circuit,

overtemperature, as well as DC speaker protection.

All

of

these

protections

come

with

automatic

recovery.

Customers can leverage every TPA3138D2 feature in

existing designs as it is fully pin-to-pin compatible to

TI's TPA3110D2, TPA3136D2 and TPA3136AD2.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPA3138D2

HTSSOP (28)

9.70 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

TPA3138 Layout with Ferrite Beads