TAS5731MPHPR datasheet(65/81 Pages) TI1

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RESET

PDN

SDA

PLL_FLTM

PLL_FLTP

AVDD/DVDD

PVDD

3.3 V

8 V–24 V

SCL

Digital

Audio

Source

I C

Control

Inputs

B0264-26

Loop

Filter

SDIN

LRCLK

SCLK

MCLK

OUT_A

OUT_B

BST_A

BST_B

OUT_C

OUT_D

BST_C

BST_D

PBTL

TAS5731M

www.ti.com

SLOS838C – JULY 2013 – REVISED AUGUST 2015

10.2.2 Mono Parallel Bridge Tied Load Application

A mono system refers to a system in which the amplifier is used to drive a single loudspeaker. Parallel Bridge

Tied Load (PBTL) indicates that the two full-bridge channels of the device are placed in parallel and drive the

loudspeaker simultaneously using an identical audio signal. The primary benefit of operating the TAS5731M

device in PBTL operation is to reduce the power dissipation and increase the current sourcing capabilities of the

amplifier output. In this mode of operation, the current limit of the audio amplifier is approximately doubled while

the on-resistance is approximately halved.

The loudspeaker can be a full-range transducer or one that only reproduces the low-frequency content of an

audio signal, as in the case of a powered subwoofer. Often in this use case, two stereo signals are mixed

together and sent through a low-pass filter in order to create a single audio signal which contains the low

frequency information of the two channels.

The Mono Parallel Bridge Tied Load application is shown in Figure 71.

Figure 71. Mono Parallel Bridge Tied Load Application

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