SD

1

FAULT

2

LINP

3

LINN

4

NC

6

NC

13

NC

5

PBTL

14

GVDD

9

GND

8

RINN

11

RINP

12

PLIMIT

10

AVCC

7

PVCCR

15

PVCCR

16

BSPR

17

OUTPR

18

PGND

19

OUTNR

20

BSNR

21

BSNL

22

OUTNL

23

PGND

24

OUTPL

25

BSPL

26

PVCCL

27

PVCCL

28

PAD

29

U1

TPA3136D2

100k

R9

PVCC

RINN

RINP

PVCC

PVCC

1µF

C1

100 µF

C8

0.1µF

C9

1000pF

C10

GND

GND

GND

PVCC

100 µF

C2

0.1µF

C3

1000pF

C4

GND

GND

GND

GND

1µF

C24

1µF

C25

39k

R5

GND

GND

1µF

C16

GND

PLIMIT

SD

0.47µF

C17

0.47µF

C19

0.68uF

C6

GND

0.68uF

C27

GND

FAULT

GND

56k

R6

GND

IN

/SHUTDOWN

100k

R10

PVCC

4R

10µH

L1

10µH

L2

Copyright © 2017, Texas Instruments Incorporated

18

TPA3136D2, TPA3136AD2

SLOS938F – MAY 2016 – REVISED JANUARY 2020

www.ti.com

Product Folder Links: TPA3136D2 TPA3136AD2

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Copyright © 2016–2020, Texas Instruments Incorporated

Typical Applications (continued)

Figure 19. Stereo Class-D Amplifier with PBTL Output and Single-Ended Input with Spread Spectrum

Modulation

10.2.1 Design Requirements

10.2.1.1 PCB Material Recommendation

FR-4 Glass Epoxy material with 1 oz. (35 µm) is recommended for use with the TPA3136D2, TPA3136AD2. The

use of this material can provide for higher power output, improved thermal performance, and better EMI margin

(due to lower PCB trace inductance). It is recommended to use several GND underneath the device thermal pad

for thermal coupling to a bottom side copper GND plane for best thermal performance.

10.2.1.2 PVCC Capacitor Recommendation

The large capacitors used in conjunction with each full-bridge, are referred to as the PVCC Capacitors. These

capacitors should be selected for proper voltage margin and adequate capacitance to support the power

requirements. In practice, with a well designed system power supply, 100 μF, 16 V will support most applications

with 12-V power supply. 25-V capacitor rating is recommended for power supply voltage higher than 12 V. For

The PVCC capacitors should be low ESR type because they are used in a circuit associated with high-speed

switching.

10.2.1.3 Decoupling Capacitor Recommendations

In order to design an amplifier that has robust performance, passes regulatory requirements, and exhibits good

audio performance, good quality decoupling capacitors should be used. In practice, X7R should be used in this

application.

The voltage of the decoupling capacitors should be selected in accordance with good design practices.

Temperature, ripple current, and voltage overshoot must be considered. This fact is particularly true in the

selection of the ceramic capacitors that are placed on the power supply to each full-bridge. They must withstand

the voltage overshoot of the PWM switching, the heat generated by the amplifier during high power output, and

the ripple current created by high power output. A minimum voltage rating of 16 V is required for use with a 12-V

power supply.