Supply Voltage (V)

0

10

20

30

40

50

60

70

80

20

5

15

25

10

20

D002

TPA3116 (BD Mode)

TPA3126 (Hybrid Mode)

Audio

Source

And Control

RIGHT

LEFT

TPA3126D2

PLIMIT

MODSEL

SDZ

Power Limit

Mode Select

PVCC

Power Supply

4.5V t 26V

LC

Filter

LC

Filter

MUTE

FAULTZ

MONO

DETECT

PBTL

DETECT

AM Avoidance Control

AM2,1,0

GAIN/SLV

GAIN control and Master/Slave setting

SYNC

Capable of synchronizaing to other devices

AVCC

Separate Power

Supply (Optional)

4.5V-26V

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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.

TPA3126D2

SLOS942 – APRIL 2018

TPA3126D2 50-W Stereo, Analog-Input, Class-D Audio Amplifier with Low, 15-mA Idle

Current and AM Avoidance

1

1 Features

1

•

Longer Battery-Operating Time:

–

Ultra-Low Idle Current: 15 mA at 12 V

•

2 × 50 W Into a 4-Ω Load at 21 V, 10% THD+N

•

Wide Voltage Range: 4.5 V to 26 V

•

Highly Efficient Class-D Operation

–

Hybrid Modulation Scheme Dynamically

Reduces Power Loss

–

•

Pop-and-Click Noise Suppression

•

Supports Stereo, Mono BTL and Mono PBTL

•

Multiple Switching Frequencies:

–

AM Avoidance

–

Master and Slave Synchronization

–

300-KHz to 1.2-MHz Switching Frequencies

•

Selectable Gains: 20 dB, 26 dB, 32 dB, 36 dB

•

Programmable Power Limit

•

Supports Both Single and Dual Power Supply

•

Integrated Protections with Error Report:

–

Overvoltage, Undervoltage, Overtemperature,

DC-Detect, and Short Circuit

•

Thermally Enhanced Package

–

DAD (32-Pin HTSSOP PowerPAD™ Up)

•

Performance Upgrade of the TPA3116D2

–

70% Less Idle Current; Pin-to-Pin Compatible

2 Applications

•

Speaker Docks

•

•

Voice Operated Speakers or Smart Speakers

•

Sound Bars

•

Bookshelf Stereo System

3 Description

The TPA3126D2 is a 50-W, stereo, low-idle-current

Class-D amplifier in a thermally enhanced package.

The TPA3126D2 includes TI's proprietary hybrid

modulation scheme, which dynamically reduces idle

current at low power levels to extend the battery life

of portable audio systems, like bluetooth speakers.

To further simply the design, the Class-D amplifier

integrates full protection features including short

circuit, thermal shutdown, overvoltage, undervoltage,

and DC speaker protection. Faults are reported back

to the processor to prevent devices from being

damaged during overload conditions.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPA3126D2

HTSSOP (32)

11.00 mm × 6.20 mm

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

the end of the data sheet.

SPACER

TPA3126 and TPA3116 Idle Current

Simplified Application Circuit