TPA3128D2,

TPA3129D2

4.5 V–26 V

PSU

LC Filter

OUTPR

OUTNR

OUTPL

OUTNL

Right

Left

MONO

Detect

TPA3128D2

4.5 V–26 V

PSU

LC Filter

OUTPR

OUTNR

OUTPL

OUTNL

Right

Left

PBTL

Detect

21

TPA3128D2, TPA3129D2

www.ti.com

SLOS941C – MAY 2016 – REVISED JANUARY 2018

Product Folder Links: TPA3128D2 TPA3129D2

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Copyright © 2016–2018, Texas Instruments Incorporated

Table 6. AM Frequencies (continued)

US

EUROPEAN

SWITCHING FREQUENCY (kHz)

AM2

AM1

AM0

AM FREQUENCY (kHz)

AM FREQUENCY (kHz)

1547-1700

1548-1701

600 (or 500)

0

1

0

0

0

1

7.4 Device Functional Modes

7.4.1 PBTL Mode

The TPA3128D2 can be connected in PBTL mode enabling up to 60W output power. This is done by:

•

Connect INPL and INNL directly to Ground (without capacitors) this sets the device in Mono mode during

power up.

•

Connect OUTPR and OUTNR together for the positive speaker terminal and OUTNL and OUTPL together for

the negative pin.

•

Analog input signal is applied to INPR and INNR.

Figure 34. PBTL Mode

7.4.2 Mono Mode (Single Channel Mode)

The and TPA3129D2 can be connected in MONO mode to cut the idle power-loss nearly by half. This is done by:

•

Connect INPR and INNR directly to Ground (without capacitors) this sets the device in Mono mode during

power up.

•

Connect OUTPL and OUTNL to speaker just like normal BTL mode.

•

Analog input signal is applied to INPL and INNL.

Figure 35. MONO Mode